| [preliminary survey on aquatic vegetations in baiyangdian lake]. | a field survey was conducted on the species composition, community type, distribution pattern, and biomass of aquatic vegetations in the baiyangdian lake of hebei province. a total of 39 species were observed, including 16 emergent species, 14 submerged species, 6 floating-leaved species, and 3 floating species, belonging to 21 families and 32 genera. compared with those about 15 years ago, 9 species were disappeared, community types were decreased from 16 to 13, and some predominant communities ... | 2008 | 18839925 |