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A new study by Ann Pearson of Harvard University's Department of Earth and Planetary Sciences suggests that a major outbreak of marine eukaryotic algae, which triggered the Hernant Ice Age and indirectly led to the mass extinction of the last known creatures.
the results of the paper recently published in the world's top journal, Nature Geoscience.
the mass extinction of the last of the Otao period occurred 450 million years ago and is the oldest extinction event in the history of life evolution on Earth.
this extinction event resulted in a sharp decline in biodiversity, with an extinction rate of 85 per cent at the first level. Shen Jiaheng, the first author and communication author of the
thesis, said that for a long time, the Hernant ice age and the climate and marine environment changes caused by it, leading to the mass extinction of organisms, is a more mainstream international view.
However, it remains a mystery why this intense, short-lived ice age can occur against the backdrop of unusually high levels of carbon dioxide.
the research group took the study subject of the study group based on the typical section of late Otaoshi-Early Zhishi in Winnie Creek, Nevada, USA.
results show that at the end of the Otau period, due to the first occurrence and expansion of a large number of terrestrial maintenance plants, the effect of continental weathering has been enhanced, resulting in abundant biological available restricted nutrients in the ocean.
this provides a powerful condition for accelerating the growth and reproduction of phytoplankton.
" Marine Life Pump refers to the process of transferring carbon from the surface of the ocean to the deep in the ecological environment of the ocean, powered by biological or biological behavior.
" Shen Jiaheng said that the rapid expansion of eukaryokargy algae has improved the efficiency of marine biological pumps.
a large amount of organic carbon is buried in the ocean, along with large-scale sea invasion, resulting in a sharp drop in atmospheric carbon dioxide concentration in a short period of time, is the Henant ice age and biological extinction events are an important driver.
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