منابع مشابه
Reconciling niche and neutrality: the continuum hypothesis.
In this study, we ask if instead of being fundamentally opposed, niche and neutral theories could simply be located at the extremes of a continuum. First, we present a model of recruitment probabilities that combines both niche and neutral processes. From this model, we predict and test whether the relative importance of niche vs. neutral processes in controlling community dynamics will vary de...
متن کاملA niche for neutrality.
Ecologists now recognize that controversy over the relative importance of niches and neutrality cannot be resolved by analyzing species abundance patterns. Here, we use classical coexistence theory to reframe the debate in terms of stabilizing mechanisms (niches) and fitness equivalence (neutrality). The neutral model is a special case where stabilizing mechanisms are absent and species have eq...
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THE complexity of the process of carcinogenesis has led to the necessity of reducing as far as possible the factors involved in experimental carcinogenesis if there is to be any chance of elucidating the mechanisms at work. One obvious way of cutting down influences from outside the tissue undergoing carcinogenesis is to maintain it in tissue or organ culture for the appropriate period. Unfortu...
متن کاملA unified mechanistic model of niche, neutrality and violation of the competitive exclusion principle
The origin of species richness is one of the most widely discussed questions in ecology. The absence of unified mechanistic model of competition makes difficult our deep understanding of this subject. Here we show such a two-species competition model that unifies (i) a mechanistic niche model, (ii) a mechanistic neutral (null) model and (iii) a mechanistic violation of the competitive exclusion...
متن کاملNiche tradeoffs, neutrality, and community structure: a stochastic theory of resource competition, invasion, and community assembly.
Stochastic niche theory resolves many of the differences between neutral theory and classical tradeoff-based niche theories of resource competition and community structure. In stochastic niche theory, invading species become established only if propagules can survive stochastic mortality while growing to maturity on the resources left unconsumed by established species. The theory makes three pr...
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ژورنال
عنوان ژورنال: Functional Ecology
سال: 2005
ISSN: 0269-8463,1365-2435
DOI: 10.1111/j.0269-8463.2005.00948.x