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David Wilkinson gives a thorough history of the hypothesis in his paper titled, "The disturbing history of the intermediate disturbance". [2] In this paper, he explains that the idea of disturbance relating to species richness can be traced back to the 1940s in Eggeling 1947, [7] Watt 1947, [8] and Tansley 1949. [9]
This concept is a corollary of the competitive exclusion principle, which states that, controlling for all else, two species competing for exactly the same resources cannot stably coexist. It assumes normally-distributed resource utilization curves ordered linearly along a resource axis, and as such, it is often considered to be an ...
An ecological community is a group of trophically similar, sympatric species that actually or potentially compete in a local area for the same or similar resources. [20] Interactions between these species form the first steps in analyzing more complex dynamics of ecosystems. These interactions shape the distribution and dynamics of species.
Wilkins further grouped the species concepts into seven basic kinds of concepts: (1) agamospecies for asexual organisms (2) biospecies for reproductively isolated sexual organisms (3) ecospecies based on ecological niches (4) evolutionary species based on lineage (5) genetic species based on gene pool (6) morphospecies based on form or ...
Consider the two species case, where R* 1 < R* 2. When species 2 is at equilibrium, R = R* 2, and species 1's population will be increasing. When species 1 is at equilibrium, R = R* 1, and species 2's population will be decreasing. [1] This method has been extended to analyze more complex models, such as species with a Type II functional ...
Biological constraints are factors which make populations resistant to evolutionary change. One proposed definition of constraint is "A property of a trait that, although possibly adaptive in the environment in which it originally evolved, acts to place limits on the production of new phenotypic variants."
Hubbell built on earlier neutral models, including Robert MacArthur and E.O. Wilson's theory of island biogeography [1] and Stephen Jay Gould's concepts of symmetry and null models. [7] An "ecological community" is a group of trophically similar, sympatric species that actually or potentially compete in a local area for the same or similar ...
Ecological release refers to a population increase or population explosion that occurs when a species is freed from limiting factors in its environment. Sometimes this may occur when a plant or animal species is introduced, for example, to an island or to a new territory or environment other than its native habitat. When this happens, the new ...