The importance of competition in determining species coexistence has been much debated. A phylogenetic analysis of sedges indicates that competitive exclusion may inhibit co-occurrence among closely related species, but not among more distant relatives.

Archaeologists argue that the replacement of Neanderthals by modern humans was driven by interspecific competition due to a difference in culture level. To assess the cogency of this argument, we construct and analyze an interspecific cultural competition model based on the Lotka-Volterra model, which is widely used in ecology, but which incorporates the culture level of a species as a variable...

The model presented in this paper is applied to the widespread phenomenon of religious shift, but may be more generally applicable to a variety of competitive social systems. The model allows for either competitive exclusion (a ≥ 1) or stable coexistence (a < 1) in systems composed of two social groups, and makes sense in the context of social networks. A similar model (reference 1) was applied...

—In the Warner Mountains of California, two sympatric species of chipmunk partition their habitat primarily through the mechanism of competitive exclusion by social dominance and aggressive interactions. Forests are optimal habitats for both Neotamias amoenus and N. minimus. In this study N. amoenus actively excludes N. minimus from the forest through successful aggressive interspecific interac...

Methods: Litters from three and two sows, respectively, were treated at birth and again at weaning with either of two porcinederived competitive exclusion cultures, one less diverse than the other. Another litter was treated as above with the least diverse competitive exclusion culture that had been supplemented with Bacteroides thetaiotaomicron, a bacterium implicated in effecting gut cell dev...

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...

There was a long standing contradiction between formulations of the competitive exclusion principle and natural species richness, which is known as the biodiversity paradox. Here we investigate a role of fitness differences in coexistence of two completely competing species using individual-based cellular automata. According to the classical formulations of the competitive exclusion principle s...

&lt;p&gt;In the presence of nitrogen oxides, nitrate-reducing bacteria (NRB) may use nitrate as an electron acceptor, reduce to nitrite, and finally convert nitrite or ammonium (NO N2O). Studies have shown that BCX (Bio-Competitive Exclusion) is a viable , ecologically benign, low-cost technique for regulating NRB in its first phases study application. More precisely, Pseudomonas sp. isolate fr...