2 edition of Testing and extending the neutral theory of biodiversity in lake communities. found in the catalog.
Testing and extending the neutral theory of biodiversity in lake communities.
Steven C. Walker
Written in English
Hubbell"s (2001) neutral model describes how local communities are structured if population dynamics are statistically identical among species in a constant, possibly patchy, environment with random speciation. Tests of this model have been restricted largely to terrestrial communities. Here I tested the fit of this neutral model to fish, zooplankton and phytoplankton species-abundance distributions from 32 well-studied lake communities varying widely in lake size and productivity. I measured the fit of the communities to the neutral model in three ways. All but one zooplankton (9 of 10) and all but three fish (10 of 13) communities were consistent with all three measures of fit. However, all nine phytoplankton communities did not fit the neutral model by at least one measure. I showed that a simple extension of the neutral model could generate a variety of species-abundance distributions similar to both phytoplankton and neutral communities.
|The Physical Object|
|Number of Pages||102|
So, parasites also plays very important role in evolution of biodiversity. In a paper published in Nature by two authors, Levin Ale, Reese Lambert argued that niches are very important in maintenance of biological diversity, also in species diversity. In this way, they challenged the neutral theory of biodiversity. Communities Come, Communities Go. In a recent review, Ricklefs noted that an ecological community comprises a single place that happens to be occupied by an assemblage of species with overlapping distributions and environmental further argued that the community concept be “replaced by the spatial distributions of populations, which now become the primary focus Cited by:
‘‘Biodiversity’’ is a relatively new compound word, but biological diversity (when referring to the number of species) is not. Over the last decade its deﬁnition has taken a more reductionist turn. Possibly the simplest deﬁnition for biodiversity, lacking in speciﬁcity or con-text, is merely the number of species. Yet many have. Among the kinds of diversity patterns I seek to explain with this new theory are those illustrated in ﬁgure This graph shows patterns of relative species abundance in a diverse array of ecological communities, ranging from an open-ocean planktonic copepod community, to a tropical bat community, to a community of rainforest trees, to theFile Size: KB.
Relative species abundance is a component of biodiversity and refers to how common or rare a species is relative to other species in a defined location or community. Relative abundance is the percent composition of an organism of a particular kind relative to the total number of organisms in the area. Scientists have released ground-breaking findings that dismiss the 'Neutral Theory of Biodiversity'. The theory has dominated biodiversity research for the past decade, and been advocated as a.
Solvolytic studies of 1-phenyl-1 chlorocyclopropanes
An exposition continued upon the sixt [sic], seventh, eighth, ninth, tenth, eleventh, twelfth, and thirteenth chapters of the prophet Ezekiel
Dollars, dependents, and dogma
A sincere Christians answer to the appeal to the common sense of all Christian people, concerning an important point of doctrine, imposed upon their consciences, by the authority of church government
Suggested activities for mentally retarded children.
Welcome to the jungle
British Columbias mineral sector
Neuropharmacology of Epilepsy
Where Love HS Gone
Ferrari Berlinetta Boxer, 365 & 512 series
Common Law Procedure Act
Tips for U.S. visas
Natural heritage news
Life of Octavia Hill as told in her letters
This is a book about a new general theory of biodiversity in a geographical context. I definebiodiversityto be synonymous with species richness and relative species abundance in space and s richnessis simply the total number of species in a defined space at a given time, andrelative species abundancerefers to their commonness or rarity.
This is a less inclusive definition of. In many ways Hubbell's theory is the ecological analog to the neutral theory of genetic drift in genetics. The unified neutral theory of biogeography and biodiversity should stimulate research in new theoretical and empirical directions by ecologists, evolutionary biologists, and by: One of the fundamental questions of ecology is what controls biodiversity.
Recent theory suggests that biodiversity is controlled predominantly by neutral drift of species abundances1,2,3, by: In many ways Hubbell’s theory is the ecological analog to the neutral theory of genetic drift in genetics.
The unified neutral theory of biogeography and biodiversity should stimulate research in new theoretical and empirical directions by ecologists, evolutionary biologists, and biogeographers. stochastic theory to explain patterns of species richness in ecological communities.
He called this the unified neutral theory of biodiversity. As in other neutral theories (see Chave  for a review), Hubbell's model is one of zero-sum ecological drift, meaning that a community has a fixed number of individuals and that.
fragmentation in a “uniﬁed neutral theory of biodiversity and biogeography” (Hubbell, ). Hubbell’s theory is modeled on neutral theory in population genetics, where within a species, each individual’s prospects of death and reproduction are independent of its genotype (Kimura, ).
Ecologists apply neutral theory. Chesson’s theory opens the door for a common set of equations that link concepts in ecological speciation to the ecological maintenance of diversity in competitive communities.
Chesson’s theory has also recently been used to show how species coexistence can predict the efficiency of resource use, and production of biomass in communities that control the functioning of by: 9. Abstract. Recent publications have pitted, on the one hand, the neutral theory of biodiversity – that leaves ample room for demographic processes such as reproduction, mortality, migrations, extinctions and speciation that have major random components – and, on the other hand, the ecological niche theory, more deterministic, that favours relationships with the environment and mechanisms Author: Alain Pavé.
3 45 cornerstone for understanding the impacts of habitat loss and fragmentation (Laurance ). 46 Together, niche theory and island biogeography theory have been considered very influential in 47 the development of conservation concepts (Schulte et al.
Another vein of biodiversity 48 theories are neutral theories that assume that the establishment of individuals in a communityAuthor: Katrin M. Meyer, Marco Sciaini, Clara-Sophie van Waveren.
Steve C. Walker () Testing and extending the neutral theory of biodiversity in lake communities. () Deb J. Walks (Ph.D.) The origin and dynamics of. This ambitious book presents a new, general neutral theory to explain the origin, maintenance, and loss of biodiversity in a biogeographic context.
Until now biogeography (the study of the geographic distribution of species) and biodiversity (the study of species richness and relative species abundance) have had largely disjunct intellectual Cited by: In many ways Hubbell's theory is the ecological analog to the neutral theory of genetic drift in genetics.
The unified neutral theory of biogeography and biodiversity should stimulate research in new theoretical and empirical directions by ecologists, evolutionary biologists, and biogeographers.
The Uniﬁed Neutral Theory of Biodiversity and Biogeography at Age Ten James Rosindell1,2, Stephen P. Hubbell3,4 and Rampal S. Etienne5,6 1Institute of Integrative and Comparative Biology, University of Leeds, Leeds, UK, LS2 9JT 2Institute of Bioinformatics and Evolutionary Studies, University of Idaho, Moscow, IDUSA 3Department of Ecology and Evolutionary Biology, University of.
A decade has now passed since Hubbell published The Unified Neutral Theory of Biodiversity and Biogeography. Neutral theory highlights the importance of dispersal limitation, speciation and ecological drift in the natural world and provides quantitative null models for assessing the role of adaptation and natural selection.
Significant advances have been made in providing methods for Cited by: The theory aims to explain the diversity and relative abundance of species in ecological communities, although like other neutral theories of ecology, Hubbell's theory assumes that.
biodiversity. Recent theory suggests that biodiversity is con-trolled predominantly by neutral drift of species abundances1–4. This theory has generated considerable controversy5–12, because it claims that many mechanisms that have long been studied by ecologists (such as niches) have little involvement in structuring communities.
stochastic theory to explain patterns of species richness in ecological communities. He called this the uniﬁed neutral theory of biodiversity. As in other neutral theories (see Chave  for a review), Hubbell’s model is one of zero-sum ecological drift, meaning that a community has a ﬁxed number of individuals and that.
This assumption is simple enough to allow neutral theory to unify diverse aspects of ecology and biogeography such as species abundance distributions, changes in species composition over space and time, and the impacts of habitat fragmentation in a “unified neutral theory of biodiversity and biogeography” (Hubbell, ).
Hubbell’s theory is modeled on neutral theory in population. Learn Biological Diversity (Theories, Measures and Data sampling techniques) from National Research Tomsk State University. The course presents an overview of the theory behind biological diversity evolution and dynamics and of methods for Commitment: 6 weeks of study, hours/week.
Policy support and biodiversity assessment Meet two famous researchers from the early days of biodiversity research: Charles Darwin and Alexander von Humboldt. Darwin developed a powerful theory, using a limited amount of data by modern standards.
Humboldt, in contrast, compiled a “Cosmos” of data without developing a major theory, although some of Humboldt’s observations on Cited by:.
Hubbell SP. The Unified Neutral Theory of Biodiversity and Biogeography. Princeton University Press, Princeton, NJ. Princeton University Press, Princeton, NJ. Google ScholarCited by: More recently, Hubbell's unified neutral theory of biodiversity and biogeography similarly, “ rests on a key first principle, namely that the interspecific dynamics of ecological communities is a stochastic zero-sum game”.
That is, the total number of individuals in a community is constant or at least only stochastically by: Many theoretical models of community dynamics predict that species richness (S) and total abundance (N) are regulated in their temporal fluctuations.
We present novel evidence for widespread regulation of biodiversity. For 59 plant and animal assemblages from around the globe monitored annually for a decade or more, the majority exhibited regulated fluctuations compared to Cited by: