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The global assessment of freshwater animals on the International Union for Conservation of Nature’s (IUCN) Red List of Threatened Species evaluated the extinction risk of 23,496 freshwater ...
“Most species don’t have just one threat putting them at risk of extinction, but many threats acting together,” said Sayer, a study-co-author. The tally, published in the journal Nature, is the first that time researchers have analyzed the global risk to freshwater species. Previous studies have focused on land animals including including ...
Researchers assessed the status of 23,496 species of freshwater animals in groups including fishes, crustaceans such as crabs, crayfish and shrimp and insects such as dragonflies and damselflies ...
Those species that are extant, yet are threatened with extinction, are referred to as threatened or endangered species. The dodo of Mauritius, shown here in a 1626 illustration by Roelant Savery, is an often-cited example of modern extinction. [25] Currently, an important aspect of extinction is human attempts to preserve critically endangered ...
The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is an inventory of the global conservation status and extinction risk of biological species. [1]
Of North American freshwater species, an estimated 48.5% of mussels, 22.8% of gastropods, 32.7% of crayfishes, 25.9% of amphibians, and 21.2% of fish are either endangered or threatened. [24] Extinction rates of many species may increase severely into the next century because of invasive species, loss of keystone species, and species which are ...
The theory has been reviewed by Alexander et al in 2014 [11] and continues to grow rapidly, adding both genetic and ecological complexity. Evolutionary rescue is expected to produce a U-shaped curve of population dynamics after a sudden change in the environment, as genotypes that are unable replace themselves are replaced by those that can.
The report concluded that global warming of 2 °C (3.6 °F) over the preindustrial levels would threaten an estimated 5% of all the Earth's species with extinction even in the absence of the other four factors, while if the warming reached 4.3 °C (7.7 °F), 16% of the Earth's species would be threatened with extinction.