Journal ArticleDOI
Niches versus neutrality: uncovering the drivers of diversity in a species-rich community.
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TLDR
This work provides the first empirical evidence that a niche-neutral model can explain niche space occupancy pattern in a natural species-rich community and suggests this class of model may be a useful hypothesis for the generation and maintenance of species diversity in other size-structured communities.Abstract:
Ecological models suggest that high diversity can be generated by purely niche-based, purely neutral or by a mixture of niche-based and neutral ecological processes. Here, we compare the degree to which four contrasting hypotheses for coexistence, ranging from niche-based to neutral, explain species richness along a body mass niche axis. We derive predictions from these hypotheses and confront them with species body-mass patterns in a highly sampled marine phytoplankton community. We find that these patterns are consistent only with a mechanism that combines niche and neutral processes, such as the emergent neutrality mechanism. In this work, we provide the first empirical evidence that a niche-neutral model can explain niche space occupancy pattern in a natural species-rich community. We suggest this class of model may be a useful hypothesis for the generation and maintenance of species diversity in other size-structured communities.read more
Citations
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Coexistence of insect species competing for a pulsed resource: toward a unified theory of biodiversity in fluctuating environments.
Samuel Venner,Pierre-François Pélisson,Marie-Claude Bel-Venner,François Débias,Etienne Rajon,Frédéric Menu +5 more
TL;DR: In this paper, the authors explored mechanisms that might promote the local coexistence of phytophagous insects (four sister species of the genus Curculio) competing for oak acorns, a pulsed resource.
Journal ArticleDOI
Neighbour interactions strengthen with increased soil resources in a northern hardwood forest
TL;DR: In this article, the authors developed individual-based growth models as functions of local tree neighbourhood and measurements of soil resources for 10 common tree species from sites established across a soil resource gradient in north-west Lower Michigan, USA.
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Unravelling the role of determinism and stochasticity in structuring the phytoplanktonic metacommunity of the Paraná River floodplain
TL;DR: It is concluded that both processes affect the structure of phytoplankton metacommunities in a floodplain system and suggest the preponderance of stochastic organisation.
Journal ArticleDOI
Opposing Mechanisms Drive Richness Patterns of Core and Transient Bird Species
TL;DR: It is shown that North American bird communities can reliably be divided into core and transient species groups and that the richness of each group is driven by different processes.
Journal ArticleDOI
Stabilizing effects in temporal fluctuations: management, traits, and species richness in high-diversity communities.
Jan Lepš,Jan Lepš,Maria Májeková,Maria Májeková,Alena Vítová,Jiří Doležal,Jiří Doležal,Francesco de Bello,Francesco de Bello +8 more
TL;DR: The negative effect of eutrophication on community stability does not operate through increasing synchrony, but through the reduction of diversity, showing that the weakening of the portfolio effect with species richness decline is a crucial driver of community destabilization.
References
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Book
Generalized Additive Models: An Introduction with R, Second Edition
TL;DR: In this article, a simple linear model is proposed to describe the geometry of linear models, and a general linear model specification in R is presented. But the theory of linear model theory is not discussed.
Book
The Unified Neutral Theory of Biodiversity and Biogeography
TL;DR: A study of the issue indicates that it is not a serious problem for neutral theory, and there is sometimes a difference between some of the simulation-based results of Hubbell and the analytical results of Volkov et al. (2003).
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Mechanisms of Maintenance of Species Diversity
TL;DR: Stabilizing mechanisms are essential for species coexistence and include traditional mechanisms such as resource partitioning and frequency-dependent predation, as well as mechanisms that depend on fluctuations in population densities and environmental factors in space and time.
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The Competitive Exclusion Principle
TL;DR: By emphasizing the very aspects that might result in their denial of them were they less plain the authors can keep the principle explicitly present in their minds untit they see if its implications are, or are noty as unpleasant as their subconscious might suppose.
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The Paradox of the Plankton
TL;DR: The problem that is presented by the phytoplankton is essentially how it is possible for a number of species to coexist in a relatively isotropic or unstructured environment all competing for the same sorts of materials.