Article: Trophic Level
Animal Sciences;      700+ words ... ... a similar source. Each step in a food chain is a trophic level. A food chain is a series of organisms each eating ... to top predator. Each level in a food chain or food web is known as a trophic level, a group of organisms that all consume ...

Dictionary definition: trophic level
A Dictionary of Biology;      272 words ...trophic level The position that an organism occupies in a food chain . For example, green plants (which obtain their energy directly from sunlight) are the primary producers ; herbivores are primary ...

Article: Trophic studies in a high-latitude fjord ecosystem--a comparison ...
Canadian Journal of Fisheries and Aquatic Sciences;  December 1, 2008 ;     700+ words ... ... webs. Since the introduction of the food chain concept by Elton (1927), the understanding ... are the major food sources for lower trophic-level invertebrates, while krill is the major ... thousand]-4[per thousand] per trophic level for [delta][sup.13]C or [delta ...

Article: Diel vertical migration in the Lake Superior pelagic community. ...
Canadian Journal of Fisheries and Aquatic Sciences;  October 1, 2006 ;     700+ words ... ... applied to DVM behavior of a single trophic level. We evaluate the costs (predation ... trajectories for a three-level pelagic food chain in Lake Superior containing opossum ... namaycush), in a Lake Superior pelagic food chain. The framework, however, is general ...

Article: Evaluating the knowledge base for expanding ...
Canadian Journal of Fisheries and Aquatic Sciences;  December 1, 2008 ;     700+ words ... ... the expansion of fisheries to lower trophic-level marine invertebrate and plant species ... a global trend of declining average trophic level of fisheries (Pauly et al. 1998 ... rapid expansion and profit from low-trophic-level fisheries can be short term. For example ...

Article: Multicriteria Bayesian analysis of lower trophic ...
Human and Ecological Risk Assessment;  June 1, 2003 ;     700+ words ... ... in the structure of the lower trophic level associated with exotic species ... management actions and lower trophic level parameter values. The analysis ... explicitly considering lower trophic level uncertainties can alter decisions ...

Article: Dispersal, boundary processes, and trophic-level ...
Ecology;  April 1, 1995 ;     700+ words ... ... of the influence dispersal-related processes and local trophic level interactions have on population and assemblage dynamics ... the influence of dispersal-related processes and local trophic level interactions on fish assemblages in streams adjacent to beaver ...