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Dugongs are constrained in their feeding by their rudimentary dentition and limited nitrogen abundance in seagrasses. To counter this, they use a strategy called "cultivation grazing". This grazing can alter the composition of seagrass communities and favor species. Early and rapidly growing species will succeed over slow-growing species.
Critically endangered (CR) species face an extremely high risk of extinction in the wild. As of January 2020, the International Union for Conservation of Nature (IUCN) listed 203 critically endangered mammalian species, including 31 which are tagged as possibly extinct.
The Amazonian manatee (Trichechus inunguis) is a species of manatee that lives in the Amazon Basin in Brazil, Peru, Colombia and Ecuador. [2] It has thin, wrinkled brownish or gray colored skin, with fine hairs scattered over its body and a white chest patch.
While the category of data deficient indicates that no assessment of extinction risk has been made for the taxa, the IUCN notes that it may be appropriate to give them "the same degree of attention as threatened taxa, at least until their status can be assessed."
Near threatened (NT) species do not currently qualify for critically endangered (CR), endangered (EN) or vulnerable (VU) statuses, but are likely to qualify for a threatened category in the near future, or are already close to qualifying.
Latin name The scientific name of the species : Common names Common names of the species Image An image of the species Bonn Convention: Appendix I "Migratory species that have been categorized as being in danger of extinction throughout all or a significant proportion of their range are listed on Appendix I of the Convention."
The Beluga sturgeon is an example of a critically endangered species. Their wild populations have been reduced due to overharvesting for its caviar. The current extinction crisis is witnessing extinction rates that are occurring at a faster rate than that of the natural extinction rate.
Umbrella species are species selected for making conservation-related decisions, typically because protecting these species indirectly protects the many other species that make up the ecological community of its habitat (the umbrella effect). Species conservation can be subjective because it is hard to determine the status of many species.