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Permian Triassic Extinction

All articles tagged with #permian triassic extinction

science2 days ago•8 min saved

Metabolism and Oxygen Rates Shaped Survival in Earth's Greatest Mass Extinction

A Stanford-led study shows that during the Permian–Triassic extinction about 252 million years ago, rapid warming and falling oxygen favored more metabolically active animals with efficient oxygen uptake (like mollusks) over slow, low-energy groups (such as brachiopods), helping explain why clams and snails survived while many ancient rivals vanished and highlighting how current ocean warming could drive similar patterns.

via SciTechDaily|

#brachiopods #great-dying #metabolism

earth-science7 days ago•16 min saved

Ancient Ocean Heatwaves Hint at Today’s Warming Danger

A new study links the Permian-Triassic 'Great Dying' to warming oceans with expanding oxygen-poor waters, showing species most vulnerable to higher temperatures and low oxygen died off at higher rates; the findings serve as a warning that contemporary human-driven warming could trigger a similar marine crisis if carbon emissions aren’t curbed.

via Gizmodo|

#earth-science #global-warming #great-dying

science3 months ago•55 min saved

CAM-like photosynthesis may have aided lycophytes through the Permian–Triassic crisis

A study links Early Triassic pioneer lycophytes to modern Isoetes, showing a CAM-like photosynthetic strategy that could have boosted survival under extreme heat and drought during the Permian–Triassic mass extinction. Climate-model simulations show land temperatures exceeding modern C3 tolerance, while carbon-isotope data suggest these plants employed a mixed C3/CAM physiology. The work implies CAM flexibility helped sustain low-diversity lycophyte communities, influencing ecosystem recovery and broader carbon cycling in a greenhouse Early Triassic world.

via Nature|

#cam-photosynthesis #climate-modeling #isoetes

science1 year ago•2 min saved

Scientists Uncover Why Earth Remained a Hot Wasteland After the Great Dying

Scientists have uncovered that the prolonged super greenhouse conditions after the Permian–Triassic extinction were caused by the destruction of tropical forests, which normally help regulate Earth's carbon cycle. The volcanic eruptions in Siberia decimated these forests, reducing the planet's ability to absorb carbon and prolonging the hot, uninhabitable state for millions of years. Recovery was slow, with only small plants initially recolonizing the land, delaying the stabilization of Earth's climate.

via The Daily Galaxy|

#carbon-cycle #climate-change #permian-triassic-extinction

science1 year ago•5 min saved

Ancient Earth’s Prolonged Greenhouse Era Explained by Vegetation Collapse

Scientists have discovered that the prolonged super greenhouse conditions after the Permian–Triassic mass extinction were caused by the loss of tropical forests, which reduced Earth's ability to absorb carbon dioxide, leading to a sustained hothouse state for about five million years. This research highlights the critical role of tropical biomes in maintaining climate stability and the potential consequences of their loss today.

via ScienceAlert|

#carbon-cycle #climate-change #greenhouse-gases

science1 year ago•4 min saved

Scientists Uncover How Past Climate Catastrophes Shaped Earth's Recovery

Scientists have discovered that the prolonged super greenhouse conditions after the Permian–Triassic mass extinction were caused by the loss of tropical forests, which disrupted Earth's organic carbon cycle and kept the planet in a hothouse state for millions of years, highlighting the importance of tropical biomes in climate regulation.

via The Conversation|

#carbon-cycle #climate-change #mass-extinction

science1 year ago•4 min saved

New Fossil Evidence Reveals Causes of Earth's Most Severe Extinction and Post-Event Climate Crisis

New research on fossils from Earth's most famous extinction event shows that the collapse of tropical forests led to reduced carbon sequestration, causing prolonged global warming and crossing climate tipping points, with implications for understanding past and future climate change.

via Phys.org|

#carbon-sequestration #climate-change #fossil-record

science2 years ago•4 min saved

Species Adaptation During Earth's Largest Extinction: A Study on Shell Life Competition

A new study conducted by paleontologists from the University of Bristol and Wuhan University challenges the long-held belief that bivalves outcompeted brachiopods during the end-Permian mass extinction. The research, published in Nature Communications, suggests that both groups were equally affected by the crisis and responded to similar external drivers. While bivalves eventually thrived and adapted to high ocean temperatures, brachiopods retreated to deeper waters. The study sheds light on the evolution of life after the mass extinction and the construction of modern ecosystems.

via Phys.org|

#bivalves #brachiopods #evolution