| predation of mansonia (diptera: culicidae) by native mosquitofish in southern florida. | in experimental tanks and wading pools, the mosquitofish gambusia holbrooki reduced densities of mansonia larvae which, because of their attachment to the roots of aquatic plants, have been regarded previously as relatively impervious to predation. exoskeletal remains of larval mansonia were recovered from 43.5% of stomachs dissected from g. holbrooki, but not from heterandria formosa (least killifish) collected from two undisturbed ponds covered with water lettuce (pistia stratiotes l.). after ... | 1992 | 1495036 |
| monitoring and assessment of mercury pollution in the vicinity of a chloralkali plant. iv. bioconcentration of mercury in in situ aquatic and terrestrial plants at ganjam, india. | in situ aquatic and terrestrial plants including a few vegetable and crop plants growing in and around a chloralkali plant at ganjam, india were analyzed for concentrations of root and shoot mercury. the aquatic plants found to bioconcentrate mercury to different degrees included marsilea spp., spirodela polyrhiza, jussiea repens, paspalum scrobiculatam, pistia stratiotes, eichhornia crassipes, hygrophila schulli, monochoria hastata and bacopa monniera. among wild terrestrial plants chloris barb ... | 1992 | 1536599 |
| chromium-induced biochemical changes in eichhornia crassipes (mart) solms and pistia stratiotes l. | | 1992 | 1568071 |
| colonization of mansonia dives schiner in a field insectary. | successful colonization of mansonia dives, the principal vector of subperiodic brugia malayi was established in a field insectary. mean egg clusters laid on eichhornia crassipes, pistia stratiotes, homalomena cordata and polystyrofoam strips were 12.0, 10.4, 9.5 and 13.7 respectively. however, the mean number of first instar larvae hatched from each egg cluster laid by females on the three plant substrates (range 51.1 to 58.6) was higher than that laid on the polystyrofoam strips (41.8). there w ... | 1991 | 1683011 |
| biological control of pistia stratiotes l. in western state, nigeria. | | 1970 | 5437523 |
| filarial diseases in ceylon: a geographic and historical analysis. | medical records concerning filarial diseases in ceylon date from the account of davy[1], though there are hints as to the more obvious manifestations in the old chronicles of the country, too. a first survey was conducted in 1912/1913 concentrating on urban areas, followed by a second survey in the 1930s with emphasis on the rural parts. the results displayed a remarkable distribution pattern: wuchereria bancrofti, the so-called "urban type", concentrated in galle and matara towns, whereas brugi ... | 1983 | 6152421 |
| aquatic vegetation and their natural hospitability to the immatures of mansonia mosquitos, the vectors of brugia malayi in shertallai, kerala, india. | prevalence of various aquatic vegetation and their role in supporting vector breeding were studied by drawing plant samples from natural fresh water habitats in shertallai region which is endemic for brugia malayi. as many as 30 aquatic plant species were identified in addition to the most abundant and preferred host plants such as pistia stratiotes, salvinia molesta and eichhornia crassipes which are of major concern due to their contribution for vector proliferation. fallow lands and paddy fie ... | 1994 | 7667728 |
| calsequestrinlike calcium-binding protein is expressed in calcium-accumulating cells of pistia stratiotes. | to contend with high calcium (ca) levels in the environment, many plant species contain crystal idioblasts, specialized cells which accumulate large amounts of ca as oxalate crystals. the biochemical processes involved in the accumulation of ca in crystal idioblasts are unknown, as these cells constitute only a minor proportion of the total plant tissue. to address how crystal idioblasts buffer cytosolic ca during crystal formation, we purified these cells from water lettuce and assessed their b ... | 1993 | 8346206 |
| [use of the herbicide diquat for the control of the aquatic plant pistia stratiotes and its importance in the control of mosquitoes (diptera: culicidae)]. | the feasibility of the use of the diquat herbicide (reglone) in the control of the pistia stratiotes aquatic plant is tested. this facilitates the reduction of mosquito larva densities by the action of natural enemies present in the ecosystem. the associated fauna is not affected by the employed concentrations of the herbicide under these conditions. | 1994 | 9768236 |
| ecology of larval mosquitoes, with special reference to anopheles arabiensis (diptera: culcidae) in market-garden wells in urban dakar, senegal. | the urban area of dakar, senegal, contains > 5,000 market-garden wells that provide permanent sites for mosquito larvae, in particular anopheles arabiensis patton, the major vector of malaria. a study of the bioecology of mosquito larvae was conducted over 1 yr with a monthly visit to 48 of these wells. overall, 9,589 larvae were collected of which 80.1% were culicinae and 11.9% anophelinae. larvae from stages iii and iv (n = 853) were identified to 10 species. an. arabiensis represented 86% of ... | 1998 | 9835685 |
| l-ascorbic acid and l-galactose are sources for oxalic acid and calcium oxalate in pistia stratiotes. | axenic pistia stratiotes l. plants were pulse-chase labeled with [14c]oxalic acid, l[1-14c]ascorbic acid, l-6-14c]ascorbic acid, d-[1-14c]erythorbic acid, l-[1-14c]galactose, or [1-14c]glycolate. specific radioactivities of l-ascorbic acid (asa), free oxalic acid (oxa) and calcium oxalate (caox) in labeled plants were compared. samples of leaf tissue were fixed for microautoradiography and examined by confocal microscopy. results demonstrate a biosynthetic role for asa as precursor of oxa and it ... | 2000 | 10731019 |
| population dynamics and net primary production of the aquatic macrophyte nymphaea rudgeana c. f. mey in a lotic environment of the itanhaém river basin (sp, brazil). | in this paper we evaluated the population dynamics and obtained estimates of the net primary production of the aquatic macrophyte nymphaea rudgeana in an arm of the itanhaém river (são paulo state, brazil). this species presents, in the studied area, a broad seasonal variation of biomass. as from november (13.1 g dw/m2) we observed a gradual increase of biomass that reached a maximum in february (163.1 g dw/m2). then, the biomass decreased, maintaining low levels until a new growth period. the r ... | 2000 | 10838927 |
| biosynthesis of l-ascorbic acid and conversion of carbons 1 and 2 of l-ascorbic acid to oxalic acid occurs within individual calcium oxalate crystal idioblasts. | l-ascorbic acid (asa) and its metabolic precursors give rise to oxalic acid (oxa) found in calcium oxalate crystals in specialized crystal idioblast cells in plants; however, it is not known if asa and oxa are synthesized within the crystal idioblast cell or transported in from surrounding mesophyll cells. isolated developing crystal idioblasts from pistia stratiotes were used to study the pathway of oxa biosynthesis and to determine if idioblasts contain the entire path and are essentially inde ... | 2001 | 11161021 |
| integrating nonindigenous aquatic plant control with protection of snail kite nests in florida. | the endangered snail kite (rostrhamus sociabilis) feeds primarily on the freshwater apple snail (pomacea paludosa) in florida. the nonindigenous, floating water hyacinth (eichhornia crassipes) and water lettuce (pistia stratiotes) impede kites from finding snails. effective control of these aquatic plants in the littoral zone of central and south florida lakes benefits kites by maintaining open foraging habitat. however, incidental herbicide spraying of nesting substrates result in nest collapse ... | 2001 | 11436998 |
| cadmium uptake by floating macrophytes. | cd uptake capacity of a group of floating macrophytes (salvinia herzogii, pistia stratiotes, hydromistia stolonifera and eichhornia crassipes) was determined in outdoors experiments during the lowest temperature period of the year. although all studied species were highly efficient in the cd uptake, pistia stratiotes was selected for further research because of its superior performance and its higher average relative growth rate. cadmium% removal by pistia stratiotes was greater in the first 24 ... | 2001 | 11456161 |
| environmental conditions and pathogen removal in macrophyte- and algal-based domestic wastewater treatment systems. | the environmental conditions and pathogen removal in macrophyte (pistia stratiotes and lemna paucicostata) and algal-based wastewater treatment systems were determined over a period of 29 days under tropical conditions. the experiment was conducted on a batch scale in 4.5 plastic containers immersed in moist sand beds. a control of raw sewage stored under dark conditions was included. environmental conditions such as ph, temperature do and conductivity and heterotrophic and faecal enterococci po ... | 2001 | 11700649 |
| application of a constructed wetland for non-point source pollution control. | in taiwan, non-point source (nps) pollution is one of the major causes of impairment of surface waters. the main objective of this study was to evaluate the efficacy of using constructed wetlands on nps pollutant removal and water quality improvements. a field-scale constructed wetland system was built inside the campus of national sun yat-sen university (located in southern taiwan) to remove (1) nps pollutants due to the stormwater runoff, and (2) part of the untreated wastewater from school dr ... | 2001 | 11804154 |
| the effect of ph on enterococci removal in pistia-, duckweed- and algae-based stabilization ponds for domestic wastewater treatment. | a batch scale experiment was conducted to determine the effect of ph on enterococci die-off. a continuous flow system was also established to determine the environmental conditions and their effects on enterococci removal. the batch experiment was conducted for phs: 4, 5, 7, 9, and 11 under light and dark conditions. enterococci and do were measured every day and every other day respectively for nine days. pathogen removal rates at ph 4, 5, 7, 9 and 11 in the light/dark were (expressed as d(-1)) ... | 2002 | 11833733 |
| microcosm wetlands for wastewater treatment with different hydraulic loading rates and macrophytes. | constructed wetlands (cw) usually require large land areas for treating wastewater. this study evaluated the feasibility of applying cw with less land requirement by operating a group of microcosm wetlands at a hydraulic retention time (hrt) of less than 4 d in southern taiwan. an artificial wastewater, simulating municipal wastewater containing 200 mg l(-1) of chemical oxygen demand (cod), 20 mg l(-1) of nh4+-n (an), and 20 mg l(-1) of po4(3-)-p (op), was the inflow source. three emergent plant ... | 2002 | 11931463 |
| a new cytotoxic stigmastane steroid from pistia stratiotes. | a new cytotoxic stigmastane, 7beta-hydroxy-4,22-stigmastadien-3-one (3), together with two known cytotoxic stigmastanes (1, 2) and a norisoprenoid (4), have been isolated from the aquatic plant pistia stratiotes. the structure determination was accomplished by spectroscopic methods. | 2002 | 11939171 |
| combined effects of cadmium and composted manure to aquatic organisms. | to evaluate the interactive toxicity of cadmium (cd) and composted manure to aquatic organisms 96 h static bioassays were conducted in the laboratory with fry of common carp (cyprinus carpio), copepod (diaptomusforbesi) and oligochaete worm (branchiura sowerbyi). five concentrations of composted manure (0, 0.25, 0.5, 1.0 and 6.7 g/l) were prepared from the aquatic weed, pistia stratiotes and each of them was combined with several concentrations of cd to determine 96 h lc-50 values of cd for the ... | 2002 | 11999773 |
| effects of macrophytes and external carbon sources on nitrate removal from groundwater in constructed wetlands. | several microcosm wetlands unplanted and planted with five macrophytes (phragmites australis, commelina communis, penniserum purpureum, ipomoea aquatica, and pistia stratiotes) were employed to remove nitrate from groundwater at a concentration of 21-47 mg no3-n/l. in the absence of external carbon, nitrate removal rates ranged from 0.63 to 1.26 g no3-n/m2/day for planted wetlands. planted wetlands exhibited significantly greater nitrate removal than unplanted wetlands (p<0.01), indicating that ... | 2002 | 12166674 |
| [chemical constituents of pistia stratiotes l]. | to investigate the chemical constituents of pistia stratiotes, a kind of duckweed. | 1999 | 12205884 |
| bioaccumulation of 65zn2+ ions by some hydrophytic plants. | this paper deals with a study on the retention of radioactive ions 65zn2+ from diluted waste solutions by the hydrophytic plants lemna minor, elodea canadensis, pistia stratiotes and riccia fluitans. the bioaccumulation degree decreases in the following order: riccia fluitans approximately pistia stratiotes > or = lemna minor > elodea canadensis the possibility to improve the bioaccumulation degree varying the temperature and the solution ph, in the absence of other cations, has been studied. th ... | 2002 | 12219990 |
| variation of nutrient and metal concentrations in aquatic macrophytes along the rio cachoeira in bahia (brazil). | the use of cuprous fungicides in cocoa production in the southern part of the state of bahia (brazil) for decades has caused an accumulation of copper in various components of the cocoa plantations, and a contamination of regional freshwater ecosystems is suspected. urban and industrial sources are supposed to contribute to water pollution and eutrophication of the rio cachoeira, the main river in this region. in order to study the metal contamination and nutritional status of this freshwater ec ... | 2002 | 12222613 |
| biodegradation of diesel fuel by an azolla-derived bacterial consortium. | the widely distributed water fern azolla was investigated for use as an amendment in the bioremediation of fuel-contaminated environments. in a field experiment azolla pinnata as well as pistia stratiotes and salvinia molesta were applied to plots containing soil that had been surface-contaminated with diesel fuel (2.4 l m(-2)) and flooded with water. the plants quickly died and bacterial flocs developed around the dead a. pinnata fronds. after 16 weeks, diesel concentrations (as determined by l ... | 2002 | 12403010 |
| the control of pistia stratiotes in ceylon by means of herbicides. | | 1954 | 13189327 |
| studies on the bionomics of mosquito vectors which transmit filariasis in india. v. further studies on attachment of mansonia annulifera larvae to host plants occurring in tanks containing pistia stratiotes in kerala state, south india. | | 1960 | 13689286 |
| the possible control of pistia stratiotes l. with diquat. | | 1962 | 13988165 |
| studies on infestation of pistia stratiotes linn. by the caterpillar of namangana pectinicornis hymps., a noctuid moth, and its effects on mansonioides breeding. | | 1963 | 14246480 |
| further studies on infestation of pistia stratiotes linn., by the caterpillar of the moth, namangana pectinicornis hymps., and other factors that affect mansonioides breeding in the ponds in kerala. | | 1963 | 14296149 |
| studies on the comparative hospitability of salvinia auriculata aubet and pistia stratiotes linn., to mansonioides annulifera (theobald) in kerala. | | 1963 | 14296157 |
| method of attachment of pupae of mansonia annulifera (theo) and m. uniformis (theo.) to pistia stratiotes. | | 1965 | 14302005 |
| isolation of a crystal matrix protein associated with calcium oxalate precipitation in vacuoles of specialized cells. | the formation of calcium (ca) oxalate crystals is considered to be a high-capacity mechanism for regulating ca in many plants. ca oxalate precipitation is not a stochastic process, suggesting the involvement of specific biochemical and cellular mechanisms. microautoradiography of water lettuce (pistia stratiotes) tissue exposed to 3h-glutamate showed incorporation into developing crystals, indicating potential acidic proteins associated with the crystals. dissolution of crystals leaves behind a ... | 2003 | 14555781 |
| chromium bioaccumulation: comparison of the capacity of two floating aquatic macrophytes. | the capacity of salvinia herzogii and pistia stratiotes to remove cr (iii) from water and their behaviour at different cr (iii) concentrations were studied in outdoor experiments. cr distribution in aerial parts and roots with time and the possible mechanisms of cr uptake were analyzed. both macrophytes efficiently removed cr from water at concentrations of 1, 2, 4 and 6 mgcrl(-1). s. herzogii was the best adapted species. at a greater initial concentration, greater bioaccumulation rates were ob ... | 2004 | 15016526 |
| calcium channels are involved in calcium oxalate crystal formation in specialized cells of pistia stratiotes l. | pistia stratiotes produces large amounts of calcium (ca) oxalate crystals in specialized cells called crystal idioblasts. the potential involvement of ca(2+) channels in ca oxalate crystal formation by crystal idioblasts was investigated. | 2004 | 15087302 |
| arsenic reduction from aqueous environment by water lettuce (pistia stratiotes l.). | arsenate uptake by aquatic plant water lettuce (pistia stratiotes l.) was studied in the laboratory condition to investigate a low cost natural aquatic treatment system for pollutant removal. the plants were harvested from a local pollution free pond in young condition and hydroponically cultured in the laboratory. bioaccumulation was noticed to be both concentration and duration dependent. the results show that the plant could effectively abosrb arsenic between a range of 0.25 to 5.0 mg/l to th ... | 2003 | 15270347 |
| comparative performance studies of water lettuce, duckweed, and algal-based stabilization ponds using low-strength sewage. | a bench-scale continuous-flow wastewater treatment system comprising three parallel lines using duckweed (spirodela polyrhiza), water lettuce (pistia stratiotes), and algae (natural colonization) as treatment agents was set up to determine environmental conditions, fecal coliform profiles and general treatment performance. each line consisted of four ponds connected in series fed by diluted sewage. influent and effluent parameters measured included environmental conditions, turbidity, biochemica ... | 2004 | 15371212 |
| biogeography of the pistia clade (araceae): based on chloroplast and mitochondrial dna sequences and bayesian divergence time inference. | pistia stratiotes (water lettuce) and lemna (duckweeds) are the only free-floating aquatic araceae. the geographic origin and phylogenetic placement of these unrelated aroids present long-standing problems because of their highly modified reproductive structures and wide geographical distributions. we sampled chloroplast (trnl-trnf and rpl20-rps12 spacers, trnl intron) and mitochondrial sequences (nad1 b/c intron) for all genera implicated as close relatives of pistia by morphological, restricti ... | 2004 | 15503671 |
| chromium induced lipid peroxidation in the plants of pistia stratiotes l.: role of antioxidants and antioxidant enzymes. | in the plant, pistia stratiotes l., the effect of different concentrations of chromium (0, 10, 40, 80 and 160 microm) applied for 48, 96 and 144 h was assessed by measuring changes in the chlorophyll, protein, malondialdehyde (mda), cysteine, non-protein thiol, ascorbic acid contents and superoxide dismutase (sod), ascorbate peroxidase (apx) and guiacol peroxidase (gpx) activity of the plants. both in roots and leaves, an increase in mda content was observed with increase in metal concentration ... | 2005 | 15620753 |
| mansonia dyari, mansonia flaveola and aedeomyia squamipennis in the dominican republic, three new country records. | we report the first collection of 3 mosquito species representing 2 genera in the dominican republic. the collections of adults and larvae of mansonia dyari belkin, heinemann, and page and mansonia flaveola (coquillett) from santo domingo city represent 2 additional mosquito species to the mosquito fauna of the dominican republic. larvae were collected in the quitasueno and puerta de hierro lagoons (covered with the pistia stratiotes plants) in santo domingo. the associated species aedeomyia squ ... | 2004 | 15669390 |
| accumulation of trace elements by pistia stratiotes: implications for phytoremediation. | the toxicity of eight potentially toxic trace elements (ag, cd, cr, cu, hg, ni, pb and zn) to pistia stratiotes was examined to determine if this plant showed sufficient tolerance and metal accumulation to be used to phytoremediate waste water and/or natural water bodies polluted with these heavy metals. young plants of equal size were grown hydroponically and amended with 0, 0.1, 0.3, 0.5, 1.0, 3.0 and 5.0 mm of each heavy metal individually for 21 days. root elongation as well as emergence of ... | 2004 | 15673213 |
| simultaneous heavy metal removal mechanism by dead macrophytes. | the use of dead, dried aquatic plants, for water removal of metals derived from industrial activities as a simple biosorbent material has been increasing in the last years. the mechanism of simultaneous metal removal (cd2+, ni2+, cu2+, zn2+ and pb2+) by 3 macrophytes biomass (spirodela intermedia, lemna minor and pistia stratiotes) was investigated. l. minor biomass presented the highest mean removal percentage and p. stratiotes the lowest for all metals tested. pb2+ and cd2+ were more efficient ... | 2006 | 15990152 |
| mosquito development and biological control in a macrophyte-based wastewater treatment plant. | a one-year study of the proliferation of mosquito in a pistia stratiotes-based waste stabilization ponds in cameroon revealed that mansonia and culex were the main breeding genera with about 55% and 42% of the total imagoes respectively. though the ponds represent a favorable breeding ground for mosquitoes, only 0.02% of captured imagoes was anopheles gambiae, suggesting that this wastewater treatment plant does not significantly contribute to the development of the malaria vector in the area. g ... | 2005 | 16114683 |
| phytoremediation potential of myriophyllum aquaticum and pistia stratiotes to modify antibiotic growth promoters, tetracycline, and oxytetracycline, in aqueous wastewater systems. | antibiotics are frequently used in the united states as feed efficiency promoters and medicines for livestock that is destined for human consumption. these antibiotics are released into the environment through the runoff and wastewater streams from animal feedlots and land applications of manure. the exposure of microorganisms to these antibiotics has reportedly resulted in the development of resistant species of microorganisms, which in turn can lead to human health hazards. phytoremediation of ... | 2005 | 16128442 |
| first record of cercospora pistiae causing leaf spot of water lettuce (pistia stratioites) in brazil, with particular reference to weed biocontrol. | pistia stratioites, the water lettuce, is an important pantropical aquatic weed. it has been the target of successful classical biocontrol programmes utilizing an insect natural enemy collected in brazil and introduced into australia, papua new guinea and south africa. little attention was given to the fungal pathogens associated with this weed as potential biocontrol agents. an 11-month field survey in the state of rio de janeiro involving repeated visits to 12 sites, and a 2-month survey in th ... | 1998 | 16284837 |
| comparative study on chemical pretreatments to accelerate enzymatic hydrolysis of aquatic macrophyte biomass used in water purification processes. | in this study, enzymatic hydrolysis of two floating aquatic plants which are suitable for water purification, water hyacinth (eichhornia crassipes) and water lettuce (pistia stratiotes l.), was performed to produce sugars. twenty chemical pretreatments were comparatively examined in order to improve the efficiency of enzymatic hydrolysis. as a result, the alkaline/oxidative (a/o) pretreatment, in which sodium hydroxide and hydrogen peroxide were used, was the most effective pretreatment in terms ... | 2006 | 16309902 |
| application of a constructed wetland for industrial wastewater treatment: a pilot-scale study. | the main objective of this study was to examine the efficacy and capacity of using constructed wetlands on industrial pollutant removal. four parallel pilot-scale modified free water surface (fws) constructed wetland systems [dimension for each system: 4-m (l)x1-m (w)x1-m (d)] were installed inside an industrial park for conducting the proposed treatability study. the averaged influent contains approximately 170 mg l(-1) chemical oxygen demand (cod), 80 mg l(-1) biochemical oxygen demand (bod), ... | 2006 | 16413595 |
| application of eichhornia crassipes and pistia stratiotes for treatment of urban sewage in israel. | the effectiveness of sewage purification by aquatic plants, such as water hyacinth (eichhornia crassipes) and water lettuce (pistia stratiotes), was tested on laboratory and pilot scales. cascade and semi-continuous pilot experiments verified that the plants are capable of decreasing all tested indicators of water quality to levels that permit the use of the purified water for irrigation of tree crops. this applies to biochemical oxygen demand (bod), chemical oxygen demand (cod), total suspended ... | 2006 | 16597484 |
| mercury contents in aquatic macrophytes from two reservoirs in the paraíba do sul: guandú river system, se brazil. | this paper reports on a study to determine the hg content in the five most abundant aquatic macrophyte species (elodea densa, sagittaria montevidensis, salvinia auriculata, pistia stratiotes and eichhornia crassipes) in two artificial reservoirs flooded by water diverted from the paraíba do sul river, se brazil. the potential of these species for hg accumulation and their role in hg transport along the river system due to macrophyte management were evaluated. mercury concentrations were higher i ... | 2006 | 16680311 |
| mercury uptake and accumulation by four species of aquatic plants. | the effectiveness of four aquatic plants including water hyacinth (eichornia crassipes), water lettuce (pistia stratiotes), zebra rush (scirpus tabernaemontani) and taro (colocasia esculenta) were evaluated for their capabilities in removing mercury from water. the plants were exposed to concentrations of 0 mg/l, 0.5 mg/l or 2 mg/l of mercury for 30 days. assays were conducted using both microtox (water) and cold vapor atomic absorption spectroscopy (aas) (roots and water). the microtox results ... | 2007 | 16781033 |
| cadmium and chromium removal kinetics from solution by two aquatic macrophytes. | the aim of this work was to determine chromium and cadmium bioaccumulation processes of two free-floating macrophytes commonly used in wetlands for water treatment: salvinia herzogii and pistia stratiotes. metal removal from the solution involves two stages: a fast one and a slow one. the fast stage of the cd uptake is significantly different for each species, while it is not significantly different in cr uptake. the most important processes of cd uptake are biological ones in s. herzogii and ad ... | 2007 | 16815611 |
| winter survival of immature instars of mansonia indubitans dyar & shannon and mansonia titillans walker (diptera: culicidae), in buenos aires, argentina. | we conducted a whole year research on the ecology of mansonia indubitans and ma. titillans in macáes pond, costanera sur reserve, buenos aires, argentina. the usage of different floating plants by immature instars and their overwintering was analyzed. the percentage of usage of the available floating macrophytes (pistia, limnobium, and salvinia) by the larvae and pupae was studied. also, we defined positivity (p+) as the percentage of plants with immature instars for each plant genus on a monthl ... | 2006 | 17072469 |
| effects of light intensity and water temperature on oxygen release from roots into water lettuce rhizosphere. | the oxygen release rate into the rhizosphere by a floating aquatic plant-water lettuce-was determined under various light intensities (0.0-1.2x10(5)lx) and water temperatures (10-35 degrees c). the net specific oxygen release rate was expressed by a model equation comprising the gross oxygen release rate and the rhizosphere respiration terms. experimental and simulated results show that the net specific oxygen release rate increased with light intensity up to the optimal value, but slight inhibi ... | 2007 | 17123569 |
| different compensatory mechanisms in two metal-accumulating aquatic macrophytes exposed to acute cadmium stress in outdoor artificial lakes. | mechanisms underlying cadmium (cd) detoxification were compared in two aquatic macrophytes commonly used in phytoremediation, namely pistia stratiotes l. and eichhornia crassipes (mart.) solms. to simulate cd pollution in the open environment, plants growing in outdoor artificial lakes were exposed for 21d to either 25 or 100microm cd, in two consecutive years. toxicity symptoms were absent or mild in both species. metal accumulation was much higher in the roots of p. stratiotes, whereas in e. c ... | 2007 | 17292445 |
| density-dependent reproductive and vegetative allocation in the aquatic plant pistia stratiotes (araceae). | pistia stratiotes is an aquatic macrophyte that grows in temporary-ponds in the southern pantanal, brazil. it reproduces both sexually and asexually and is usually observed forming dense mats on the water surface, a condition favored by the plant's vegetative reproduction coupled with an ability for rapid growth. in this study we examined the effect of densely crowded conditions on the production of reproductive and vegetative structures. in addition, we verified whether there is a trade-off bet ... | 2005 | 17354448 |
| nitrate removal and denitrification affected by soil characteristics in nitrate treatment wetlands. | several small-scale surface flow constructed wetlands unplanted and planted (monoculture) with various macrophytes (phragmites australis, typha orientalis, pennisetum purpureum, ipomoea aquatica, and pistia stratiotes) were established to continuously receive nitrate-contaminated groundwater. soil characteristics and their effects on nitrate removal and soil denitrification were investigated. the results showed that planted wetland cells exhibited significantly higher (p < 0.05) nitrate removal ... | 2007 | 17365317 |
| advanced extraction and lower bounds for removal of pollutants from wastewater by water plants. | the capacity to reach lower bounds for extraction of pollutants from wastewater by four floating aquatic macrophytes--water hyacinth (eichhornia crassipes), water lettuce (pistia stratiotes), salvinia (salvinia rotundifolia), and water primroses (ludvigia palustris)--is investigated. it is shown that the following lower bounds can be established for wastewater purification with water hyacinth: biochemical oxygen demand (bod), 1.3 mg/l; chemical oxygen demand (cod), 11.3 mg/l; total suspended sol ... | 2007 | 17469660 |
| ion exchange during heavy metal bio-sorption from aqueous solution by dried biomass of macrophytes. | in this study, potentials of oven dried biomass of eichhornia crassipes, valisneria spiralis and pistia stratiotes, were examined in terms of their heavy metal (cd, ni, zn, cu, cr and pb) sorption capacity, from individual-metal and multi-metal aqueous solutions at ph 6.0+/-0.1 (a popular ph of industrial effluent). v. spiralis was the most and e. crassipes was the least efficient for removal of all the metals. cd, pb and zn were efficiently removed by all the three biomass. cd was removed up to ... | 2008 | 17513104 |
| ethanol production from candidate energy crops: water hyacinth (eichhornia crassipes) and water lettuce (pistia stratiotes l.). | fermentation modes and microorganisms related to two typical free-floating aquatic plants, water hyacinth and water lettuce, were investigated for their use in ethanol production. except for arabinose, sugar contents in water lettuce resembled those in water hyacinth leaves. water lettuce had slightly higher starch contents and lower contents of cellulose and hemicellulose. a traditional strain, saccharomyces cerevisiae nbrc 2346, produced 14.4 and 14.9 g l(-1) ethanol, respectively, from water ... | 2008 | 17574848 |
| concentrations of heavy metals and aquatic macrophytes of govind ballabh pant sagar an anthropogenic lake affected by coal mining effluent. | five heavy metals cu, cd, mn, pb and hg were found in high concentration from three sampling sites located in asia's largest anthropogenic lake govind ballabh pant gbp sagar. concentrations of these heavy metals were measured in water, bottom sediment and in different parts of the aquatic macrophytes collected from the reservoir. plants collected from the lake were eichhornia crassipes, azolla pinnata, lemna minor, spirodela polyrrhiza, potamogeton pectinatus, marsilea quadrifolia, pistia strati ... | 2008 | 17674134 |
| macroinvertebrate fauna associated with pistia stratiotes and nymphoides indica in subtropical lakes (south brazil). | this study was carried out at the biguás and polegar lakes, both small environments but at different successional stages. the main objective was to characterize the macroinvertebrate community associated to the aquatic macrophyte stand in each lake in order for this community, the environmental conditions and their water quality to interact. the samples were taken in 2003. the abiotic variables of n and p totals, the temperature, electrical conductivity, ph and dissolved oxygen, as well as the d ... | 2007 | 18094833 |
| chromium stress induced alterations in biochemical and enzyme metabolism in aquatic and terrestrial plants. | water is seriously polluted by the discharge of various industrial wastewater containing heavy metals. among them, chromium is considered to be toxic to living organisms and it is released mostly from tanneries. the chromium-contaminated water is discharged into nearby water bodies and it affects both aquatic and terrestrial plants. so the present experiment was conducted with an aquatic plant, water lettuce (pistia stratiotes l.) and a terrestrial plant soybean (glycine max l. merr.). they were ... | 2008 | 18206355 |
| concurrent removal and accumulation of heavy metals by the three aquatic macrophytes. | under the present investigation effectiveness of three aquatic macrophytes pistia stratiotes l. (water lettuce), spirodela polyrrhiza w. koch (duckweed) and eichhornia crassipes were tested for the removal of five heavy metals (fe, zn, cu, cr and cd). these plants were grown at three different concentrations (1.0, 2.0 and 5.0mgl(-1)) of metals in laboratory experiment. result revealed high removal (>90%) of different metals during 15 days experiment. highest removal was observed on 12th day of e ... | 2008 | 18296043 |
| amelioration of municipal sludge by pistia stratiotes l.: role of antioxidant enzymes in detoxification of metals. | pistia stratiotes when exposed to mixture of municipal sludge and effluent accumulated substantial amount of metals in the fronds and roots. with the increase in the metal accumulation by the plants, a reduction in the concentration of metals was found in leachates. the treated plants showed reduced level in chlorophylls but enhanced level of carotenoids and protein. the plant showed a concomitant increase in the activities of antioxidant enzymes; superoxide dismutase, guiacol peroxidase and als ... | 2008 | 18499446 |
| impact of sugar factory effluent on the growth and biochemical characteristics of terrestrial and aquatic plants. | the physico-chemical characteristics of sugar industry effluent were measured and some were found to be above those limits permissible in the indian irrigation water standard. a pot study was initially conducted to study the effects of different concentrations (20%, 40%, 60%, 80% and 100%) of sugar factory effluent on seed germination, seedling growth and biochemical characteristics of green gram and maize. a similar study was also carried out using the aquatic plants, water hyacinth and water l ... | 2008 | 18784897 |
| bats, clover, water lettuce and malaria. | | 1947 | 18901445 |
| changes in antioxidant enzyme activities in eichhornia crassipes (pontederiaceae) and pistia stratiotes (araceae) under heavy metal stress. | whole plants of eichhornia crassipes and pistia stratiotes were exposed to various concentrations (0, 0.1, 0.3, 0.5, 1.0, 3.0 and 5.0 mm) of 8 heavy metals (ag, cd, cr, cu, hg, ni, pb and zn) hydroponically for 21 days. spectrometric assays for the total activity of catalase, peroxidase, and superoxide dismutase in the leaves were studied. at the end of the experimental period, data referred to metal treated plants were compared to data of untreated ones (control). heavy metals increased the act ... | 2007 | 19086387 |
| phytoremediation to remove nutrients and improve eutrophic stormwaters using water lettuce (pistia stratiotes l.). | water quality impairment by nutrient enrichment from agricultural activities has been a concern worldwide. phytoremediation technology using aquatic plants in constructed wetlands and stormwater detention ponds is increasingly applied to remediate eutrophic waters. the objectives of this study were to evaluate the effectiveness and potential of water lettuce (pistia stratiotes l.) in removing nutrients including nitrogen (n) and phosphorus (p) from stormwater in the constructed water detention s ... | 2010 | 19104863 |
| multivariate modeling of chromium-induced oxidative stress and biochemical changes in plants of pistia stratiotes l. | biochemical changes in the plants of pistia stratiotes l., a free floating macrophyte exposed to different concentrations of hexavalent chromium (0, 10, 40, 60, 80 and 160 microm) for 48, 96 and 144 h were studied. chromium-induced oxidative stress in macrophyte was investigated using the multivariate modeling approaches. cluster analysis rendered two fairly distinct clusters (roots and shoots) of similar characteristics in terms of their biochemical responses. discriminant analysis identified a ... | 2009 | 19396544 |
| microbial enumeration of different functional groups and bacterial behavior in acid basic conditions of a biotoxic landfill leachate of bahía blanca, argentina. | leachate is liquid waste from refuse biological decomposition or rainwater percolation in a landfill. this research focused on leachate produced by a landfill in bahia blanca, buenos aires, argentina. the research studied the main microbial populations involved in wastewater treatment, analyzed the behavior of bacteria isolated from leachate at different ph values, and appraised leachate biotoxicity. the number of bacteria varied by type, ranging from 1 x 10(4) to 1 x 10(5) cuf/ml aerobic hetero ... | 2009 | 19472947 |
| response of pistia stratiotes to heavy metals (cr, ni, and zn) and phosphorous. | the effects of cr, ni, zn, and p exposure on the root anatomic structure, growth, and chlorophyll a concentration of pistia stratiotes l. were studied. plastic aquaria containing 50 g of wet plants and 5 l of pond water added with the contaminant(s) were disposed. the treatments were: (1) cr, (2) ni, (3) zn, (4) p, (5) cr + ni + zn, (6) cr + ni + zn + p, and (7) control. contaminant additions were done seven times. in each addition, concentrations of 1 mg of metals or 5 mg of p per liter of wate ... | 2010 | 19506937 |
| copper-induced growth inhibition, oxidative stress and ultrastructural alterations in freshly grown water lettuce (pistia stratiotes l.). | the effects of increasing concentrations of copper on the growth, ultra-structure and on certain biochemical parameters of water lettuce (pistia stratiotes l.) were investigated under controlled conditions in the nutrient solutions containing increased copper sulfate concentrations ranging from 0 to 100 microm. copper treatment for 12, 18 or 24 h resulted in inhibition of roots and leaves dry biomass. atomic absorption spectrometry analysis of roots and leaves showed that copper accumulation inc ... | 2009 | 19523602 |
| root uptake and reduction of hexavalent chromium by aquatic macrophytes as assessed by high-resolution x-ray emission. | aquatic macrophytes salvinia auriculata, pistia stratiotes and eichhornia crassipes were chosen to investigate the cr(vi) reduced by root-based biosorption in a chromium uptake experiment, using a high-resolution xrf technique. these plants were grown in hydroponics medium supplied with non-toxic cr concentrations during a 27-day metal uptake experiment. the high-resolution cr-kbeta fluorescence spectra for dried root tissues and cr reference material (100% cr, cr(2)o(3), and cro(3)) were measur ... | 2009 | 19595427 |
| removal and accumulation of mercury by aquatic macrophytes from an open cast coal mine effluent. | in this study, the mercury (hg) removal capacities of two aquatic macrophytes, pistia stratiotes and azolla pinnata, were investigated against the coal mining effluent. these plants reduced mercury from the effluent via rhizofiltration and subsequent accumulation in plant. the removal rate of p. stratiotes and a. pinnata was 80% and 68%, respectively, after 21 days of exposure to the effluent containing 10 microg l(-1) of hg. as mercury from the effluent was accumulated in the root and shoot tis ... | 2009 | 19665290 |
| field effectiveness of bacillus thuringiensis israelensis (bti) against aedes (stegomyia) aegypti (linnaeus) in ornamental ceramic containers with common aquatic plants. | this study was undertaken to determine the impact of larvaciding using a bti (bacillus thuringiensis israelensis) formulation (vectobac wg) against aedes aegypti larvae in earthen jars containing aquatic plants. aquatic plants commonly used for landscaping, pistia stratiotes (l.) (liliopsida: araceae) and sagittaria sp. (liliopsida: alismataceae) were placed inside earthen jars filled with 50 l tap water. all earthen jars were treated with bti formulation at 8g/1000l. untreated jars with and wit ... | 2009 | 19696734 |
| evaluation of bacillus sphaericus against mansonia dyari larvae in phosphate lakes in polk county, florida. | effective mansonia larval control is difficult to achieve in polk county, florida, because the larvae attach to the root and stem mass of water lettuce (pistia stratiotes) and water hyacinth (eichhornia crassipes). this study evaluated 2 bacillus sphaericus larvicides as possible control products in 3 phosphate lakes in 2 areas maintained by polk county mosquito control. vectolex wdg was applied at 56 kg/km2 and 170 kg/km2 and vectolex cg at 560 kg/km2 and 1,100 kg/km2. one lake in each site was ... | 2009 | 19852221 |
| response of phytochelatins and their relationship with cadmium toxicity in a floating macrophyte pistia stratiotes l. at environmentally relevant concentrations. | an indoor experiment was undertaken to investigate the response of phytochelatins and their relationship to cadmium toxicity in pistia stratiotes l., a free-floating macrophyte, exposed to low concentrations of cadmium typically found in realistic environments. cadmium concentrations of 0.01 to 0.08 microm had no toxic effects on the growth of this plant, as indicated by no significant changes in the fresh weights of leaves and roots and the slight induction of phytochelatins in plant tissues, w ... | 2010 | 20183981 |
| dynamics of nitrogen in subtropical wetland and its uptake and storage by pistia stratiotes. | the paper describes the dynamics of nitrogen in different components (water, soil and plants) of kabar wetland situated in begusarai district of bihar. contents of nitrogen in the natural components were determined and were compared with the rate of uptake and accumulation under the experimental conditions. physico-chemical characteristics of natural water and of test basins were quite similar. the trend of seasonal variation of no3(-)-n in water and total n in soil and p. stratiotes tissue was ... | 2009 | 20329393 |
| inhibitory effect of pistia tannin on digestive enzymes of indian major carps: an in vitro study. | aquatic weeds are one of the major unconventional feed ingredients tested for aquafeed formulation. tannin content in the water lettuce, pistia, has been quantified (26.67 mg g(-1); dry weight) and graded levels of which (12.5-200 μg) have been incorporated in the reaction mixtures to evaluate any change in the in vitro activity of the principal digestive enzymes from the three indian major carps (imc), namely rohu (labeo rohita), catla (catla catla) and mrigala (cirrhinus mrigala). result of th ... | 2010 | 20369287 |
| [malaria transmission in lagoon areas in côte d'ivoire: the villages of n'gatty and allaba]. | the ecological and climatic variations in tropical areas of africa make the transmission of malaria very heterogeneous. several species of mosquitoes of the anopheles genus transmit the disease. in côte d'ivoire, studies in the southern and northern forests have shown the involvement of anopheles gambiae, an. funestus and an. nili in this transmission. this study was conducted in n'gatty and allaba, two villages in a lagoon area of southern côte d'ivoire, in the district of dabou. the district i ... | 2010 | 20685640 |
| aerobic and anaerobic decomposition of pistia stratiotes leachates from a tropical eutrophic reservoir (barra bonita, sp, brazil). | the present study discussed the kinetic aspects of leachate decomposition from an aquatic macrophyte, pistia stratiotes l (water lettuce). this species was collected from barra bonita reservoir located in the state of são paulo (brazil). decomposition chambers were prepared with high molecular weight (hmw), low molecular weight (lmw) and integral (int = hmw + lmw) dissolved organic matter (dom) diluted with reservoir water. the samples were incubated at 20 degrees c, in darkness and under aerobi ... | 2010 | 20730342 |
| comparison of the community structures of ammonia-oxidizing bacteria and archaea in rhizoplanes of floating aquatic macrophytes. | some common floating aquatic macrophytes could remove nutrients, such as nitrogen, from eutrophic water. however, the relationship between these macrophytes and the ammonia-oxidizing microorganisms on their rhizoplanes is still unknown. in this study, we examined communities of ammonia-oxidizing archaea (aoa) and bacteria (aob) on the rhizoplanes of common floating aquatic macrophytes (eichhornia crassipes, pistia stratiotes and ipomoea aquatic) in a eutrophic reservoir.the results show that aob ... | 2011 | 21239153 |
| uptake and distribution of metals by water lettuce (pistia stratiotes l.). | water quality impairment by heavy metal contamination is on the rise worldwide. phytoremediation technology has been increasingly applied to remediate wastewater and stormwater polluted by heavy metals. | 2011 | 21287283 |
| aquatic arsenic: phytoremediation using floating macrophytes. | phytoremediation, a plant based green technology, has received increasing attention after the discovery of hyperaccumulating plants which are able to accumulate, translocate, and concentrate high amount of certain toxic elements in their above-ground/harvestable parts. phytoremediation includes several processes namely, phytoextraction, phytodegradation, rhizofiltration, phytostabilization and phytovolatilization. both terrestrial and aquatic plants have been tested to remediate contaminated soi ... | 2011 | 21435676 |
| removal of chlorpyrifos by water lettuce (pistia stratiotes l.) and duckweed (lemna minor l.). | the potential of water lettuce (pistia stratiotes l.) and duckweed (lemna minor l.) to remove chlorpyrifos in water was investigated under laboratory greenhouse conditions. at initial chlorpyrifos concentrations of 0.0, 0.1 and 0.5 mg/l, the relative growth rates (rgr) of l. minor and p. stratiotes were not significantly different. in contrast, in the presence of 1 mg/l chlorpyrifos the rgr was significantly inhibited, giving an observed fresh weight based rgr(fw) for p. stratiotes and l. minor ... | 2011 | 21598800 |
| cobbania corrugata gen. et comb. nov. (araceae): a floating aquatic monocot from the upper cretaceous of western north america. | the fossil record of aquatic flowering plants broadens our understanding of their former diversity and origins from terrestrial ancestors. this paper describes a floating aquatic monocot from 71 whole plants and several isolated leaf fragments from upper cretaceous oxbow lake sediments in the dinosaur park formation, alberta, canada. the new material is represented by rosettes of leaves and roots attached to short stems that are interconnected by stolons and corresponds to the fossil aroid origi ... | 2007 | 21636430 |
| effect of nickel-stresses on uptake, pigments and antioxidative responses of water lettuce, pistia stratiotes l. | water lettuce plants were exposed to various concentrations (0, 0.01,0.1, 1.0 and 10.0 ppm) of nickel as nickel sulphate in nutrient medium. the effect of graded nickel (ni +2) concentrations on visible symptoms of toxicity, pigments (chlorophyll a, b and total) and antioxidative attributes were evaluated. plants exposed to high nickel (1.0 and 10.0 ppm) showed visible toxicity symptoms, such as wilting, chlorosis in young leaves, browning of root tips and broken off roots, observed at 6 days af ... | 2011 | 22167955 |
| biting midges (diptera: ceratopogonidae) from martín garcía island, argentina. | nearly 230 species of biting midges have been recorded or described from argentina; 38 of them are known from the buenos aires province and only one is cited from martín garcía island. this paper presents the results raised from six collecting trips which took place on the island during spring 2005, summer 2006 and autumn 2009. diverse sampling sites including permanent and temporary aquatic environments were chosen, most of the ten sampling sites were ponds of diverse origin, some of these envi ... | 2011 | 22017124 |
| the use of water lettuce (pistia stratiotes l.) for rhizofiltration of a highly polluted solution by cadmium and lead. | the effectiveness of heavy metal uptake from contaminated nutrient solution by four aquatic macrophytes (pistia stratiotes l., salvinia auriculata aubl, salvinia minima baker, and azolla filiculoides lam) was estimated in this study. the influence of cadmium (3.5 mg l(-1) and 10.5 mg l(-1)) and lead (25 mg l(-1) and 125 mg l(-1)) on the stress symptoms was observed through the determination of chlorophyll content and transpiration rate over 14 days of the experiment. the results of the present s ... | 2011 | 21972509 |
| biodiversity and importance of floating weeds of dara ismail, khan district of kpk, pakistan. | the present paper is based on the results of taxonomic research work conducted in dera ismail khan district of kpk, pakistan, during 2005 - 2007. the area was extensively surveyed in order to collect floating aquatic weeds. from the study area 11 floating aquatic weed species belonging to 9 genera and 9 families were collected and identified in the light of available literature. these plants include bryophytes: 1 species, ricciocarpus natans (l.) corda; pteridophytes: 2 species, azolla pinnata r ... | 2011 | 22754062 |
| antiarthritic effect of aqueous and ethanolic leaf extracts of pistia stratiotes in adjuvant-induced arthritis in sprague-dawley rats. | pistia stratiotes has been used effectively to treat a number of inflammatory conditions. this study aims to determine the antiarthritic effect of aqueous and ethanolic leaf extracts of p. stratiotes. | 2012 | 27186115 |
| pistia stratiotes (jalkumbhi). | pistia stratiotes (family: araceae) is commonly used in ayurvedic medicine. this review article is a compilation of all the updated information on its phytochemical and pharmacological activities, which were performed by different methods. studies indicate that p. stratiotes possesses diuretic, antidiabetic, antidermatophytic, antifungal, and antimicrobial properties. these results are very encouraging and indicate that this plant should be studied more extensively to confirm the reproducibility ... | 0 | 22228955 |
| a co-beneficial system using aquatic plants: bioethanol production from free-floating aquatic plants used for water purification. | a co-beneficial system using constructed wetlands (cws) planted with aquatic plants is proposed for bioethanol production and nutrient removal from wastewater. the potential for bioethanol production from aquatic plant biomass was experimentally evaluated. water hyacinth and water lettuce were selected because of their high growth rates and easy harvestability attributable to their free-floating vegetation form. the alkaline/oxidative pretreatment was selected for improving enzymatic hydrolysis ... | 2013 | 23752400 |
| culex (melanoconion) panocossa from peninsular florida, usa. | culex (melanoconion) panocossa is a suspected vector of venezuelan equine encephalitis virus in central america. prior to this report, cx. panocossa was known from central america (belize, costa rica, el salvador, guatemala, southern mexico, panama), northern south america (colombia, venezuela) and the greater antilles (cuba and jamaica). larvae (n=5) and adults (n=4286) of cx. panocossa were collected at two locations near homestead, fl, which indicates substantial established populations of th ... | 2017 | 28012907 |
| decline of a sylvatic focus of schistosoma mansoni in guadeloupe (french west indies) following the competitive displacement of the snail host biomphalaria glabrata by ampullaria glauca. | grand etang lake in guadeloupe is a focus of intestinal schistosomiasis characterized by the virtual absence of human contact and the presence of a heavily infested rat population. the lake, with a surface area of 0.03 km(2), is situated in rain forest at an altitude of 450 m. originally it contained an extensive belt of the floating plant pistia stratiotes which provided a favourable habitat for biomphalaria glabrata, the intermediate host snail of schistosoma mansoni. in 1974 and 1975, a low p ... | 1988 | 28311831 |
| aedeomyia squamipennis (diptera: culicidae) in florida, usa, a new state and country record. | aedeomyia squamipennis (lynch arribalzaga) is a tropical mosquito (diptera: culicidae) found throughout most of the american tropics, from eastern mexico through argentina, including several caribbean islands. larvae are typically associated with bodies of water with dense growths of aquatic vegetation, particularly pistia stratiotes l., water lettuce. adult females feed predominantly on the blood of birds and seek hosts in forest canopies. aedeomyia squamipennis is considered an important vecto ... | 2017 | 28399225 |
| predicting plant invasions following china's water diversion project. | china's south to north water diversion (snwd) project connects portions of the yangtze river in the south to the yellow river system in the north, overcoming biogeographic barriers to water movement. the diversion will supply potable water to over 110 million people and provide multiple other socioeconomic benefits. however, an inadvertent negative impact of this connection includes creation of conduits for species invasions. alligator weed (alternanthera philoxeroides), water hyacinth (eichhorn ... | 2017 | 28059505 |
| [impacts of human disturbance on the species composition of higher plants in the wetlands around dianchi lake, yunnan province of southwest china]. | introducing higher plants to build semi-natural wetland ecosystem is one of the key approaches to restore the wetlands and lakes that suffered from serious pollution and destruction. based on the investigation data from 128 quadrats at 26 sampling sites in the wetlands around dianchi lake in december 2011-october 2012, and in combining with the references published in the 1960s, this paper discussed the impacts of human activities on the species composition of higher plants in the wetlands aroun ... | 2013 | 24417101 |
| nutrient changes and biodynamics of eisenia fetida during vermicomposting of water lettuce (pistia sp.) biomass: a noxious weed of aquatic system. | this paper reports the results of vermicomposting of water lettuce biomass (wl) spiked with cow dung at ratios of 20, 40, 60, and 80 % employing eisenia fetida. a total of four treatments were established and changes in chemical properties of mixtures were observed. vermicomposting caused a decrease in ph, toc, volatile solids, and c/n ratio by 1.01-1.08-fold, 0.85-0.92-fold, 0.94-0.96-fold, 0.56-0.70-fold, respectively, but increase in ec, totn, totp, totk, totca, totzn, totfe, and totcu, by 1. ... | 2017 | 27709429 |