A new hypothesis, based on differences in the rates at which populations of competing species approach competitive equilibrium (reduction or exclusion of some species), is proposed to explain patterns of species diversity. The hypothesis assumes that most communities exist in a state of nonequilibrium where competitive equilibrium is prevented by periodic population reductions and ...
A General Hypothesis OF Species Diversity
A General Hypothesis OF Species Diversity. January 1979. The American Naturalist 113 (1):81-101. DOI: 10.1086/283366. Authors: Michael A Huston. Texas State University. Citations (3,371)
A General Hypothesis of Species Diversity
A General Hypothesis of Species Diversity. M. Huston. Published in American Naturalist 1 January 1979. Environmental Science, Biology. A new hypothesis, based on differences in the rates at which populations of competing species approach competitive equilibrium (reduction or exclusion of some species), is proposed to explain…. Expand. View on ...
Journal of Biogeography
We review current diversity theory and terminology in relation to scale of applicability. As a starting point in developing a general theory, we take the issue of geographical gradients in species richness as a main theme and evaluate the extent to which commonly cited theories are likely to operate at scales from the macro down to the local ...
Intermediate dispersal hypothesis of species diversity: New insights
1 INTRODUCTION. Global patterns of species diversity and their origins have fascinated evolutionary biologists since Darwin and provided a critical context for contemporary studies in ecology, evolution, and conservation.The diversity of extant species has been considered a result of the balance between speciation plus migration and species extinction (Hubbell, 2011; MacArthur & Wilson, 1967).
A general hypothesis of species diversity.
Similarly, if one species is GENERAL HYPOTHESIS O F DIVERSITY only a slightly better competitor, we would still expect it to predominate fairly quickly in a situation of rapidly increasing populations. If all competing species in a community have relatively low rates of increase, the rate of competitive displacement for that community would be ...
A GENERAL HYPOTHESIS O F SPECIES DIVERSITY
A GENERAL HYPOTHESIS O F SPECIES DIVERSITY. Published 2007. Biology, Environmental Science. TLDR. Under nonequilibrium conditions, differences in diversity are strongly influenced by variations in the rates of competitive displacement between communities, and such factors as relative competitive abilities, niche partitioning, etc., may not be ...
Species Diversity Patterns Derived From Species-area Models
The three patterns regarding species diversity were consistently supported by the results. A discussion ensues, describing how the three patterns can be used to interpret and predict species diversity, and how they are supported by other diversity hypotheses. The three generalizations suggest that, if we want to understand species diversity, we ...
A General Hypothesis of Species Diversity
A General Hypothesis of Species Diversity. Michael A. Huston. 31 Dec 1978 - The American Naturalist (University of Chicago Press) - Vol. 113, Iss: 1, pp 81-101. TL;DR: A new hypothesis, based on differences in the rates at which populations of competing species approach competitive equilibrium (reduction or exclusion of some species), is ...
Species diversity
Species diversity in a dataset can be calculated by first taking the weighted average of species proportional abundances in the dataset, and then taking the inverse of this. The equation is: [1] [2] [3] = = The denominator equals mean proportional species abundance in the dataset as calculated with the weighted generalized mean with exponent q - 1. In the equation, S is the total number of ...
The geography of climate and the global patterns of species diversity
Here we propose that the area hypothesis to explain global-scale patterns of species diversity should be modified into an area-isolation hypothesis because not only do lower-latitude climates ...
Towards a general theory of biodiversity
Considerable effort has been expended in striving for a general theory that can explain the form of the distribution3,4. ... This departs from the usual definition of diversity based on species ...
Scale and species richness: towards a general, hierarchical theory of
We review current diversity theory and terminology in relation to scale of applicability. As a starting point in developing a general theory, we take the issue of geographical gradients in species richness as a main theme and evaluate the extent to which commonly cited theories are likely to operate at scales from the macro down to the local ...
Scale and species richness: towards a general theory of species diversity
Abstract. Aim: Current weaknesses of diversity theory include: a failure to distinguish different biogeographical response variables under the general heading of diversity; and general failure of ...
PDF Scale and species richness: towards a general, hierarchical theory of
The term species richness is used for the number of species in a sample. Species diversity is commonly used interchangeably for richness, but at local scales of analysis it is often expressed as indices that weight both the richness and equitability (evenness of abundance across species) of a sample.
Latitudinal gradients in species diversity
Species richness, or biodiversity, increases from the poles to the tropics for a wide variety of terrestrial and marine organisms, often referred to as the latitudinal diversity gradient. [1] The latitudinal diversity gradient is one of the most widely recognized patterns in ecology. [1] It has been observed to varying degrees in Earth's past. [2]
The Species-Pool Hypothesis and Plant Community Diversity
The species-pool hypothesis and plant community diversity Ove Eriksson, Dept of Botany, Stockholm Univ., S-106 91, Stockholm, Sweden One of the central problems in ecology is to explain species diversity in communities, and a considerable number of hypotheses with this purpose have been for-mulated during the last three decades. One very influen-
PDF A General Hypothesis OF Species Diversity
A GENERAL HYPOTHESIS O F SPECIES DIVERSITY. Division of Biological Sciences, University of Michigan, Ann Arbor, Michigan 48109. Many explanations for diversity patterns have been proposed, and ...
Disturbance, productivity, and species diversity: empiricism vs. logic
The "intermediate disturbance hypothesis" and the "intermediate productivity hypothesis" have been widely recognized concepts for explaining patterns of species diversity for the past 40 years. While...
Scale and species richness: towards a general, hierarchical theory of
A general theory of diversity cannot be solely equilibrial, nor non-equilibrial, nor can it be based solely on geometry, nor can it be entirely historical, nor ahistorical, rather it Ó Blackwell Science Ltd 2001, Journal of Biogeography, 28, 453±470 Towards a general theory of diversity 467 must incorporate all of these things.
Effects of Biodiversity on Ecosystem Functioning: a Consensus of
Design and analysis of such experiments must account for several factors that covary with species diversity. 4) Because biodiversity both responds to and influences ecosystem properties, understanding the feedbacks involved is necessary to integrate results from experimental communities with patterns seen at broader scales. Likely patterns of ...
Scale and Species Richness: Towards a General, Hierarchical Theory of
Aim Current weaknesses of diversity theory include: a failure to distinguish different biogeographical response variables under the general heading of diversity; and a general failure of ...
Intermediate disturbance hypothesis
The intermediate disturbance hypothesis (IDH) suggests that local species diversity is maximized when ecological disturbance is neither too rare nor too frequent. At low levels of disturbance, more competitive organisms will push subordinate species to extinction and dominate the ecosystem. [1] At high levels of disturbance, due to frequent forest fires or human impacts like deforestation, all ...
Biodiversity 101: Protecting the variety of life on Earth
Biodiversity loss is the active decline in Earth's diversity of life through ecosystem degradation and species extinction. We're losing biodiversity faster than at any time in human history. Between 1970 and 2018, the world's seen wildlife populations decline by an average of 69%. More than one million species could disappear by 2050.
COMMENTS
A new hypothesis, based on differences in the rates at which populations of competing species approach competitive equilibrium (reduction or exclusion of some species), is proposed to explain patterns of species diversity. The hypothesis assumes that most communities exist in a state of nonequilibrium where competitive equilibrium is prevented by periodic population reductions and ...
A General Hypothesis OF Species Diversity. January 1979. The American Naturalist 113 (1):81-101. DOI: 10.1086/283366. Authors: Michael A Huston. Texas State University. Citations (3,371)
A General Hypothesis of Species Diversity. M. Huston. Published in American Naturalist 1 January 1979. Environmental Science, Biology. A new hypothesis, based on differences in the rates at which populations of competing species approach competitive equilibrium (reduction or exclusion of some species), is proposed to explain…. Expand. View on ...
We review current diversity theory and terminology in relation to scale of applicability. As a starting point in developing a general theory, we take the issue of geographical gradients in species richness as a main theme and evaluate the extent to which commonly cited theories are likely to operate at scales from the macro down to the local ...
1 INTRODUCTION. Global patterns of species diversity and their origins have fascinated evolutionary biologists since Darwin and provided a critical context for contemporary studies in ecology, evolution, and conservation.The diversity of extant species has been considered a result of the balance between speciation plus migration and species extinction (Hubbell, 2011; MacArthur & Wilson, 1967).
Similarly, if one species is GENERAL HYPOTHESIS O F DIVERSITY only a slightly better competitor, we would still expect it to predominate fairly quickly in a situation of rapidly increasing populations. If all competing species in a community have relatively low rates of increase, the rate of competitive displacement for that community would be ...
A GENERAL HYPOTHESIS O F SPECIES DIVERSITY. Published 2007. Biology, Environmental Science. TLDR. Under nonequilibrium conditions, differences in diversity are strongly influenced by variations in the rates of competitive displacement between communities, and such factors as relative competitive abilities, niche partitioning, etc., may not be ...
The three patterns regarding species diversity were consistently supported by the results. A discussion ensues, describing how the three patterns can be used to interpret and predict species diversity, and how they are supported by other diversity hypotheses. The three generalizations suggest that, if we want to understand species diversity, we ...
A General Hypothesis of Species Diversity. Michael A. Huston. 31 Dec 1978 - The American Naturalist (University of Chicago Press) - Vol. 113, Iss: 1, pp 81-101. TL;DR: A new hypothesis, based on differences in the rates at which populations of competing species approach competitive equilibrium (reduction or exclusion of some species), is ...
Species diversity in a dataset can be calculated by first taking the weighted average of species proportional abundances in the dataset, and then taking the inverse of this. The equation is: [1] [2] [3] = = The denominator equals mean proportional species abundance in the dataset as calculated with the weighted generalized mean with exponent q - 1. In the equation, S is the total number of ...
Here we propose that the area hypothesis to explain global-scale patterns of species diversity should be modified into an area-isolation hypothesis because not only do lower-latitude climates ...
Considerable effort has been expended in striving for a general theory that can explain the form of the distribution3,4. ... This departs from the usual definition of diversity based on species ...
We review current diversity theory and terminology in relation to scale of applicability. As a starting point in developing a general theory, we take the issue of geographical gradients in species richness as a main theme and evaluate the extent to which commonly cited theories are likely to operate at scales from the macro down to the local ...
Abstract. Aim: Current weaknesses of diversity theory include: a failure to distinguish different biogeographical response variables under the general heading of diversity; and general failure of ...
The term species richness is used for the number of species in a sample. Species diversity is commonly used interchangeably for richness, but at local scales of analysis it is often expressed as indices that weight both the richness and equitability (evenness of abundance across species) of a sample.
Species richness, or biodiversity, increases from the poles to the tropics for a wide variety of terrestrial and marine organisms, often referred to as the latitudinal diversity gradient. [1] The latitudinal diversity gradient is one of the most widely recognized patterns in ecology. [1] It has been observed to varying degrees in Earth's past. [2]
The species-pool hypothesis and plant community diversity Ove Eriksson, Dept of Botany, Stockholm Univ., S-106 91, Stockholm, Sweden One of the central problems in ecology is to explain species diversity in communities, and a considerable number of hypotheses with this purpose have been for-mulated during the last three decades. One very influen-
A GENERAL HYPOTHESIS O F SPECIES DIVERSITY. Division of Biological Sciences, University of Michigan, Ann Arbor, Michigan 48109. Many explanations for diversity patterns have been proposed, and ...
The "intermediate disturbance hypothesis" and the "intermediate productivity hypothesis" have been widely recognized concepts for explaining patterns of species diversity for the past 40 years. While...
A general theory of diversity cannot be solely equilibrial, nor non-equilibrial, nor can it be based solely on geometry, nor can it be entirely historical, nor ahistorical, rather it Ó Blackwell Science Ltd 2001, Journal of Biogeography, 28, 453±470 Towards a general theory of diversity 467 must incorporate all of these things.
Design and analysis of such experiments must account for several factors that covary with species diversity. 4) Because biodiversity both responds to and influences ecosystem properties, understanding the feedbacks involved is necessary to integrate results from experimental communities with patterns seen at broader scales. Likely patterns of ...
Aim Current weaknesses of diversity theory include: a failure to distinguish different biogeographical response variables under the general heading of diversity; and a general failure of ...
The intermediate disturbance hypothesis (IDH) suggests that local species diversity is maximized when ecological disturbance is neither too rare nor too frequent. At low levels of disturbance, more competitive organisms will push subordinate species to extinction and dominate the ecosystem. [1] At high levels of disturbance, due to frequent forest fires or human impacts like deforestation, all ...
Biodiversity loss is the active decline in Earth's diversity of life through ecosystem degradation and species extinction. We're losing biodiversity faster than at any time in human history. Between 1970 and 2018, the world's seen wildlife populations decline by an average of 69%. More than one million species could disappear by 2050.