Results 211 to 220 of about 71,090 (260)
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Science, 1999
In their report “Conservatism of ecological niches in evolutionary time” (20 Aug., p. [1265][1]), A. T. Peterson et al. demonstrate that geographically isolated sister taxa show little differentiation in ecological niche. Their results imply that ecology diverges slowly in allopatry (the geographic isolation of species), and the authors therefore ...
Chris D. Jiggins, Margarita Beltran
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In their report “Conservatism of ecological niches in evolutionary time” (20 Aug., p. [1265][1]), A. T. Peterson et al. demonstrate that geographically isolated sister taxa show little differentiation in ecological niche. Their results imply that ecology diverges slowly in allopatry (the geographic isolation of species), and the authors therefore ...
Chris D. Jiggins, Margarita Beltran
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Frontiers in Ecology and the Environment, 2007
Fifty years ago, GE Hutchinson defined the ecological niche as a hypervolume in n-dimensional space with environmental variables as axes. Ecologists have recently developed renewed interest in the concept, and technological advances now allow us to use stable isotope analyses to quantify these niche dimensions. Analogously, we define the isotopic niche
Seth D Newsome +3 more
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Fifty years ago, GE Hutchinson defined the ecological niche as a hypervolume in n-dimensional space with environmental variables as axes. Ecologists have recently developed renewed interest in the concept, and technological advances now allow us to use stable isotope analyses to quantify these niche dimensions. Analogously, we define the isotopic niche
Seth D Newsome +3 more
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Analysis of an ecological niche
Mathematical Biosciences, 1987A model of an ecological niche for different populations of organisms with competition among them is considered using the concepts of food web and niche overlap graph. The descriptive situation is given analytically by means of a strategy game in normal form where the players involved are the respective populations as separate entities.
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Physiology, Ecological Niches and Species Distribution
Ecosystems, 2009Although many studies have debated the theoretical links between physiology, ecological niches and species distribution, few studies have provided evidence for a tight empirical coupling between these concepts at a macroecological scale. We used an ecophysiological model to assess the fundamental niche of a key-structural marine species.
Helaouet, P., Beaugrand, Gregory
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The ecological niche of the consortium " Pelochromatium roseum "
Archives of Microbiology, 1998A dense accumulation of the phototrophic consortium "Pelochromatium roseum" in a small, eutrophic, freshwater lake (Dagowsee, Brandenburg, Germany) was investigated. Within the chemocline, the number of epibionts of the consortia represented up to 19% of the total number of bacteria. Per "P. roseum" a mean value of 20 epibionts was determined.
, Overmann, , Tuschak, , Sass, , Frostl
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Denitrification: ecological niches, competition and survival
Antonie van Leeuwenhoek, 1983Organisms with the denitrification capacity are widely distributed and in high density in nature. It is not well understood why they are so successful. A survey of denitrifying enzyme content of various habitats is presented which indicates a role of carbon and oxygen, but not nitrate, in affecting denitrifier populations.
J M, Tiedje +3 more
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2019
Abstract Impact assessments increasingly rely on models to project the potential impacts of climate change on species distributions. Ecological niche models have become established as an efficient and widely used method for interpolating (and sometimes extrapolating) species’ distributions.
Damaris Zurell, Jan O. Engler
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Abstract Impact assessments increasingly rely on models to project the potential impacts of climate change on species distributions. Ecological niche models have become established as an efficient and widely used method for interpolating (and sometimes extrapolating) species’ distributions.
Damaris Zurell, Jan O. Engler
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Environmental fluctuations and the theory of the ecological niche
Journal of Theoretical Biology, 1978May and MacArthur proposed that a limit to the permissible degree of similarity between competing species might result from the resilience of any of the species to environmental fluctuations dropping dramatically as the differences between the competitors were reduced. For certain idealized models of species competing for a single type of resource this
Nisbet, R.M. +2 more
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2011
This chapter explains how environmental data can be used to create models that characterize species’ ecological niches in environmental space. It introduces a model, which is a function constructed by means of data analysis for the purpose of approximating the true relationship (that is, the niche) in the form of the function f linking the environment ...
A. Townsend Peterson +6 more
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This chapter explains how environmental data can be used to create models that characterize species’ ecological niches in environmental space. It introduces a model, which is a function constructed by means of data analysis for the purpose of approximating the true relationship (that is, the niche) in the form of the function f linking the environment ...
A. Townsend Peterson +6 more
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Conservatism of Ecological Niches in Evolutionary Time
Science, 1999Theory predicts low niche differentiation between species over evolutionary time scales, but little empirical evidence is available. Reciprocal geographic predictions based on ecological niche models of sister taxon pairs of birds, mammals, and butterflies in southern Mexico indicate niche conservatism over several million years of independent ...
, Peterson +2 more
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