Trophic Cascades in Lakes:
نویسندگان
چکیده
منابع مشابه
Introduced Lake Trout Produced a Four-Level Trophic Cascade in Yellowstone Lake
—Introduction of lake trout Salvelinus namaycush into a system can add a trophic level, potentially affecting organisms at lower trophic levels. Similar to many lakes and reservoirs in the western United States, lake trout were introduced into Yellowstone Lake, Wyoming. Previous studies showed that lake trout reduced the population and altered the size structure of native Yellowstone cutthroat ...
متن کاملPiscivores, trophic cascades, and lake management.
The concept of cascading trophic interactions predicts that an increase in piscivore biomass in lakes will result in decreased planktivorous fish biomass, increased herbivorous zooplankton biomass, and decreased phytoplankton biomass. Though often accepted as a paradigm in the ecological literature and adopted by lake managers as a basis for lake management strategies, the trophic cascading int...
متن کاملTrophic Cascades and Compensation: Differential Responses of Microzooplankton in Whole-Lake Experiments
Food webs in three lake basins were manipulated by altering fish communities to either reduce or increase the abundance o f Daphnia. These basins were subsequently fertilized with nitrogen and phosphorus for two years. W e tested three predictions about the response o f heterotrophic flagellates, ciliates, and rotifers (collectively, microzooplankton) derived from prior studies. W e predicted t...
متن کاملTrophic levels and trophic tangles: the prevalence of omnivory in real food webs.
The concept of trophic levels is one of the oldest in ecology and informs our understanding of energy flow and top-down control within food webs, but it has been criticized for ignoring omnivory. We tested whether trophic levels were apparent in 58 real food webs in four habitat types by examining patterns of trophic position. A large proportion of taxa (64.4%) occupied integer trophic position...
متن کاملTrophic status and fish production potential of Golbolagh Lake (West of Kurdistan Province)
The estimation of fish potential production and trophic status are two important and necessary parts of fisheries management in lakes. This study was conducted to determinate the trophic status and fish production potential of Golbolagh Lake, for one year from October 2013 to September 2014. Physicochemical parameters and other necessary data such as chlorophyll a, phytoplankton phylum dominanc...
متن کامل