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Permian–Triassic extinction event 252 Ma Large igneous province (LIP) eruptions [ 23 ] from the Siberian Traps , [ 24 ] an impact event (the Wilkes Land Crater ), [ 25 ] an Anoxic event , [ 26 ] an Ice age , [ 27 ] or other possible causes
An extinction event (also known as a mass extinction or biotic crisis) is a widespread and rapid decrease in the biodiversity on Earth.Such an event is identified by a sharp fall in the diversity and abundance of multicellular organisms.
Evidence for ocean acidification as an extinction mechanism comes from the preferential extinction of marine organisms with thick aragonitic skeletons and little biotic control of biocalcification (e.g., corals, hypercalcifying sponges), [181] [182] which resulted in a coral reef collapse [33] [34] and an early Hettangian "coral gap". [32]
A new climate report card paints a grim future if emissions aren't reduced: "Climate change is rewiring marine ecosystems at an alarming rate." Most marine species will face extinction without ...
The extinction threat is estimated to range from 15 to 37 percent of all species by 2050, [185] or 50 percent of all species over the next 50 years. [16] The current extinction rate is 100–100,000 times more rapid today than the last several billion years. [169]
A modified version of Image:Extinction Intensity.svg. Changes: Time runs from left to right (millions of years ago). Vertical axis is apparent percentage (not the absolute number) of marine animal genera becoming extinct. Periods are coloured as per the Paris system - see w:Template:Period color for full explanation
At the time of the extinction, around 100 marine families became extinct, covering about 49% [20] of genera (a more reliable estimate than species). The brachiopods and bryozoans were strongly impacted, along with many of the trilobite, conodont and graptolite families. [10] The extinction was divided into two major extinction pulses.
Permian–Triassic boundary at Frazer Beach in New South Wales, with the End Permian extinction event located just above the coal layer [2]. Approximately 251.9 million years ago, the Permian–Triassic (P–T, P–Tr) extinction event (PTME; also known as the Late Permian extinction event, [3] the Latest Permian extinction event, [4] the End-Permian extinction event, [5] [6] and colloquially ...