منابع مشابه
Grazer–diatom size relationships in an epiphytic community
We investigated the animal–food size relationships of an invertebrate grazer community that feeds on the epiphytic diatoms of mosses in a Québec stream. The relationship between invertebrate head width and maximum size of ingested diatoms was significant (r2 5 0.57, n 5 82, p , 0.00001). This relationship did not differ significantly among widely different taxa of insects, crustaceans, and worm...
متن کاملIs diatom size selection by harpacticoid copepods related to grazer body size?
Copepods are known as important consumers of primary production and are eaten by larger animals. They therefore form a main link to higher trophic levels. While feeding pathways and specificity of planktonic copepods have been well studied, the selectivity of the benthic harpacticoid copepods is far less documented. A better knowledge of the functional ecology of harpacticoids as important graz...
متن کاملSize-abundance relationships in an Amazonian bird community: implications for the energetic equivalence rule.
We studied size-abundance relationships in a species-rich Amazonian bird community and found that the slope of the logarithmic relationship between population density and bodymass (b = -0.22) is significantly shallower than expected under Damuth's energetic equivalence rule (EER), which states that population energy use (PEU) is independent of species body mass. We used estimates of avian field...
متن کاملEnvironmental control of diatom community size structure varies across aquatic ecosystems.
Changes in the size structure of photoautotrophs influence food web structure and the biogeochemical cycling of carbon. Decreases in the median size of diatoms within communities, in concert with climate warming and water column stratification, have been observed over the Cenozoic in the ocean and over the last 50 years in Lake Tahoe. Decreases in the proportion of larger plankton are frequentl...
متن کاملAn upper bound on community size in scalable community detection
It is well-known that community detection methods based on modularity optimization often fails to discover small communities. Several objective functions used for community detection therefore involve a resolution parameter that allows the detection of communities at different scales. We provide an explicit upper bound on the community size of communities resulting from the optimization of seve...
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ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 2006
ISSN: 0024-3590
DOI: 10.4319/lo.2006.51.2.1211