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niche theory
As an alternative to the niche theory, Hubbell and other ecologists introduced a neutral model.
      
We also suggest that the most important task in the future is to bridge the niche-assembly theory and the neutral theory, and to add species differences to the neutral theory and more stochasticity to the niche theory.
      
Niche theory is one of the most important ecological theories.
      
Niche theory and techniques were used to analyze the changes of these functional modules in the period 1994-2003.
      
In this study, we attempt to put forward a conception of landscape ecological niche, enlightened by international scholars on extending the ecological niche theory from spatial niche to functional niche.
      
Two hypotheses which are generally applicable predict the extent of density compensation on islands: (1) Niche theory predicts that summed population densities should be low if island species number is low.
      
Lower summed densities in allopatry, which is predicted by niche theory, was found on the Outer Hebrides, but not on Gotland.
      
Niche theory predicts that species which share resources should evolve strategies to minimise competition for those resources, or the less competitive species would be extirpated.
      
Broadly speaking, there are two major theoretical foundations for microbial community assembly: one based on island biogeography theory and another based on niche theory.
      
Thus, the multiple dimensions of niche theory are reduced to factors which define the magnitudes of the phase-spatial system, in particular the boundaries of population spaces and of periods of activity.
      
A reformulation of the continuum concept is presented after considering the implications of the community/continuum controversy and current niche theory.
      
When applying niche theory to plants, the mechanisms of competition are ill-defined and the assumption of bell-shaped response curves for species unrealistic.
      
In this paper GF variation is viewed along structural niche axes, and related to classical niche theory; several corollaries of the theory are examined in the light of plant GF patterns.
      
The data are consistent with the fine-grained niche theory but difficult to reconcile with bottlenecks and genetic drift.
      
An ecological niche theory approach to the measurement of brand competition
      
Ecologists have long used niche theory to describe the ecology of a species as a whole, treating conspecific individuals as ecologically equivalent.
      
However, the relevance of niche theory here is that the ecological niche for the depleted population may actually have been reduced greatly in size.
      
Niche theory is only one possible model leading to the importance of species interactions and species differences.
      
Of course, we do not expect niche theory to apply unchanged to an economic environment.
      
The results obtained for this technology show classic evolutionary specialization patterns that can be understood on the basis of niche theory.
      
 

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