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A generalist species is able to thrive in a wide variety of environmental conditions and can make use of a variety of different resources (for example, a heterotroph with a varied diet). A specialist species can thrive only in a narrow range of environmental conditions or has a limited diet.
As habitat destruction of an area occurs, the species diversity offsets from a combination of habitat generalists and specialists to a population primarily consisting of generalist species. [3] Invasive species are frequently generalists that are able to survive in much more diverse habitats. [44]
The best-known example is the so-called "paradox of the plankton". [6] All plankton species live on a very limited number of resources, primarily solar energy and minerals dissolved in the water. According to the competitive exclusion principle, only a small number of plankton species should be able to coexist on these resources.
Species can however share a 'mode of life' or 'autecological strategy' which are broader definitions of ecospace. [27] For example, Australian grasslands species, though different from those of the Great Plains grasslands, exhibit similar modes of life. [28] Once a niche is left vacant, other organisms can fill that position.
Animals that have S 1 s that reach the threshold are defined as generalists. In nature, generalists include a wide range of prey items in their diet. [11] An example of a generalist is a mouse, which consumes a large variety of seeds, grains, and nuts. [12] In contrast, predators with relatively short S 1 s are still better off choosing to eat ...
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The bill colour is often yellow with a red spot for the larger white-headed species and red, dark red or black in the smaller species. [13] Gulls are a generalist species that can thrive in various environments and survive on a widely varied diet. They are the least specialised of all the seabirds, and their morphology allows for equal ...
r-selected species are those that emphasize high growth rates, typically exploit less-crowded ecological niches, and produce many offspring, each of which has a relatively low probability of surviving to adulthood (i.e., high r, low K). [10] A typical r species is the dandelion (genus Taraxacum).