Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Animal community (1)
- Animals (1)
- Biomass (1)
- Chemical (1)
- Coexistence (1)
-
- Community assembly (1)
- Damselfly (1)
- Daphnia (1)
- Environmental factor (1)
- Environmental gradient (1)
- Eutrophication (1)
- Food chain (1)
- Fresh water (1)
- Freshwater environment (1)
- Habitat (1)
- Hydroperiod (1)
- Indirect effects (1)
- Lestes (1)
- Lestidae (1)
- Life history (1)
- Local vs. regional species richness (1)
- Metabolism (1)
- Methylmercury compounds (1)
- New Hampshire (1)
- Phenologic priority (1)
- Predation (1)
- Predator (1)
- Species richness (1)
- Turnover (1)
- Water pollutants (1)
Articles 1 - 2 of 2
Full-Text Articles in Animal Sciences
Predators And Life Histories Shape Lestes Damselfly Assemblages Along A Freshwater Habitat Gradient, Robby Stoks, Mark A. Mcpeek
Predators And Life Histories Shape Lestes Damselfly Assemblages Along A Freshwater Habitat Gradient, Robby Stoks, Mark A. Mcpeek
Dartmouth Scholarship
Survey data from New England showed that assemblages of Lestes dam- selflies are organized along the entire gradient of pond permanence and predator presence. One assemblage occupies vernal ponds lacking large dragonfly predators and fish; four are largely confined to temporary ponds that typically contain dragonfly predators; one dom- inates fishless permanent ponds and lakes where dragonflies are the top predators; and one dominates permanent ponds and lakes where fish are the top predators. We determined the role of life history and predation in maintaining this striking pattern by conducting a series of transplant experiments in the field and a …
Algal Blooms Reduce The Uptake Of Toxic Methylmercury In Freshwater Food Webs, Paul C. Pickhardt, Carol L. Folt, Celia Y. Chen, Bjoern Klaue, Joel D. Blum
Algal Blooms Reduce The Uptake Of Toxic Methylmercury In Freshwater Food Webs, Paul C. Pickhardt, Carol L. Folt, Celia Y. Chen, Bjoern Klaue, Joel D. Blum
Dartmouth Scholarship
Mercury accumulation in fish is a global public health concern, because fish are the primary source of toxic methylmercury to humans. Fish from all lakes do not pose the same level of risk to consumers. One of the most intriguing patterns is that potentially dangerous mercury concentrations can be found in fish from clear, oligotrophic lakes whereas fish from greener, eutrophic lakes often carry less mercury. In this study, we experimentally tested the hypothesis that increasing algal biomass reduces mercury accumulation at higher trophic levels through the dilution of mercury in consumed algal cells. Under bloom dilution, as algal biomass …