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Extinction sometimes results for species evolved to specific ecologies [46] that are subjected to genetic pollution—i.e., uncontrolled hybridization, introgression and genetic swamping that lead to homogenization or out-competition from the introduced species. [47]
It is possible that the niches of introduced species as herbivores too closely mirrored those of the natives, and thus competition was the primary cause of ecological extinction. The effect of introduction of new competitors, such as the red deer and rabbit, also served to alter the vegetation in the habitat, which could have further pronounced ...
The dodo is the most famous example of a species that was probably driven to extinction by introduced species (although human hunting also played a role), other species that were victims of introduced species were the Lyall's wren, poʻo-uli and the Laysan millerbird.
Invasive species may drive local native species to extinction via competitive exclusion, niche displacement, or hybridisation with related native species. Therefore, alien invasions may result in extensive changes in the structure, composition and global distribution of the biota at sites of introduction.
An introduced species, alien species, exotic species, adventive species, immigrant species, foreign species, non-indigenous species, or non-native species is a species living outside its native distributional range, but which has arrived there by human activity, directly or indirectly, and either deliberately or accidentally. Non-native species ...
Many bird extinction events tied to disease also correlate with introduced species. Hawaiian honeycreepers , a family of finches native to Hawaii, are a prime example of this. Hawaiian honeycreeper populations are harmed by avian malaria , and its spread to these birds correlates with the arrival of the invasive southern house mosquito , a ...
Possibly introduced disease, hunting, and habitat degradation. [262] Oʻahu ʻōʻō: Moho apicalis: Oahu, Hawaii, United States 1890 1988 (IUCN) Habitat loss and introduction of disease-carrying mosquitos. [263] Mauritius owl: Mascarenotus sauzieri: Mauritius 1859 1988 (IUCN) Possibly deforestation, hunting, and predation by introduced mammals ...
Mass extinctions are characterized by the loss of at least 75% of species within a geologically short period of time (i.e., less than 2 million years). [18] [51] The Holocene extinction is also known as the "sixth extinction", as it is possibly the sixth mass extinction event, after the Ordovician–Silurian extinction events, the Late Devonian extinction, the Permian–Triassic extinction ...