Results 311 to 320 of about 558,694 (351)

Abundance models in ecology—examples

1978
A generating process In Chapter 2 we made some general assumptions concerning the distribution of X = (X1,X2,…,XS) stating that the probability generating function of X was $$ {{G}_{x}}\left( z \right) = {{M}_{v}}\left( {\Sigma {{p}_{i}}{{z}_{i}} - 1} \right), $$ where Mv( ) denotes some moment-generating function.
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Ecological Interactions and the Distribution, Abundance, and Diversity of Sponges

2012
Although abiotic factors may be important first-order filters dictating which sponge species can thrive at a particular site, ecological interactions can play substantial roles influencing distribution and abundance, and thus diversity. Ecological interactions can modify the influences of abiotic factors both by further constraining distribution and ...
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Abundance Inequality in Freshwater Communities Has an Ecological Origin

The American Naturalist, 2016
The hollow-shaped species abundance distribution (SAD) and its allied rank abundance distribution (RAD)-showing that abundance is unevenly distributed among species-are some of the most studied patterns in ecology. To explain the nature of abundance inequality, I developed a novel framework identifying environmental favorability, which controls the ...
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Variations in cone photoreceptor abundance and the visual ecology of birds

Journal of Comparative Physiology A: Sensory, Neural, and Behavioral Physiology, 2001
The relative abundance and topographical distribution of retinal cone photoreceptors was measured in 19 bird species to identify possible correlations between photoreceptor complement and visual ecology. In contrast to previous studies, all five types of cone photoreceptor were distinguished, using bright field and epifluorescent light microscopy, in ...
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Ecological Observations on the Abundance of Black Walnut in Kansas

Journal of Forestry, 1971
Abstract Observations along the prairie-forest transition zone show that the high ratio of woodland edge to woodland area creates conditions of early forest succession which are highly favorable to black walnut and other early stage intolerant tree species.
Gene W. Grey, Gary G. Naughton
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Simple and robust models of ecological abundance

1. Counts of species in ecological samples are of interest when they tell us about community assembly processes. Older process-based models of count distributions are either complex, widely rejected, or not able to predict high unevenness. 2. I leverage a general strategy for deriving simple one-parameter models.
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Abundance and feeding ecology of Antarctic phaeodarian radiolarians

Marine Biology, 1989
Phaeodarian radiolarians were sampled from the upper 200 m along a transect through the ice-edge zone in the Weddell Sea in the austral autumn (March 1986) and at several stations in the western Antarctic Peninsula region in the austral winter (June 1987).
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Ecological factors limiting the distributions and abundances of Odonata

2008
AbstractThis chapter reviews the ecological processes that define and limit the distributions and abundances of many odonate species across ecological environments. Distributions of species among standing bodies of water seem to be limited mainly by the distributions of their predators in the larval stage (e.g., larger dragonflies and fish).
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Latent Block Model for ecological abundance data

2015
Latent Block Model for ecological abundance data.
Aubert, Julie, Schbath, Sophie, Mougel, Christophe, Robin, Stephane   +3 more
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Stochastic Abundance Models in Ecology

Biometrics, 1979
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