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The word endemic is from Neo-Latin endēmicus, from Greek ἔνδημος, éndēmos, "native". Endēmos is formed of en meaning "in", and dēmos meaning "the people". [5] The word entered the English language as a loan word from French endémique, and originally seems to have been used in the sense of diseases that occur at a constant amount in a country, as opposed to epidemic diseases ...
Also Gause's law. A biological rule which states that two species cannot coexist in the same environment if they are competing for exactly the same resource, often memorably summarized as "complete competitors cannot coexist". coniferous forest One of the primary terrestrial biomes, culminating in the taiga. conservation biology The study of Earth's biodiversity with the aim of protecting and ...
Islands as harbors for endemic species are explained by the theory of island biogeography. [6] However, in order to be considered a paleoendemic on an island, the species must have had a widespread distribution previously, [ 1 ] thus eliminating newly formed islands as potential refuges of paleo-endemics.
There are numerous species of cichlids that demonstrate dramatic variations in morphology. Given the right circumstances, and enough time, evolution leads to the emergence of new species. Scientists have struggled to find a precise and all-inclusive definition of species. Ernst Mayr defined a species as a population or group of populations ...
The species-area relationship equation is: =. [10] An example of what a species-area relationship may look like when graphed. In this equation, represents the measure of diversity of a species (for example, the number of species) and is a constant representing the y-intercept.
An endemic disease is one with a continuous occurrence at an expected frequency over a certain period of time and in a certain geographical location. Two terms are used when the degree of transmission or infection of an endemic disease is high: hyperendemic and holoendemic.
The Sierra Nevada are home to half of the vascular plant species of California, with 400 species that are endemic to the region. [16] Like many mountain ranges, the plant communities of the Sierra group into biotic zones by altitude, because of the increasingly harsh climate as elevation increases. [ 19 ]
The Neotropical realm has 31 endemic bird families, which is over twice the number of any other realm. They include tanagers, rheas, tinamous, curassows, antbirds, ovenbirds, toucans, and seriemas. Bird families originally unique to the Neotropics include hummingbirds (family Trochilidae) and wrens (family Troglodytidae).