| consequences of nitrogen and phosphorus limitation for the performance of two planthoppers with divergent life-history strategies. | phytophagous insects have a much higher nitrogen and phosphorus content than their host plants, an elemental mismatch that places inherent constraints on meeting nutritional requirements. although nitrogen limitation is well documented in insect herbivores, phosphorus limitation is poorly studied. using factorial experiments in the laboratory and field, in which levels of soil nitrogen and phosphorus were manipulated, we studied the relative consequences of macronutrient limitation for two herbi ... | 2006 | 16794833 |
| trade-off in investment between dispersal and ingestion capability in phytophagous insects and its ecological implications. | in population ecology, dispersal plays a fundamental role, but is potentially costly. traditionally, studies of phenotypic trade-offs involving dispersal focus on resource allocation differences between flight and reproduction. however, investments in dispersal may also result in reduced allocation to other "third-party traits" (e.g. compensatory feeding) that are not directly associated with reproduction. such traits remain largely uninvestigated for any phytophagous insect despite their import ... | 2006 | 16470407 |
| the influence of intraspecific variation in dispersal strategies on the genetic structure of planthopper populations. | the hypothesis that levels of gene flow among populations are correlated with dispersal ability has typically been tested by comparing gene flow among species that differ in dispersal abilities, an approach that potentially confounds dispersal ability with other species-specific differences. in this study, we take advantage of geographic variation in the dispersal strategies of two wing-dimorphic planthopper species, prokelisia marginata and p. dolus, to examine for the first time whether levels ... | 1997 | 28565487 |