Articles tagged with Mass Extinction
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Recent DNA duplications occurred 65 million years ago, coinciding with the last mass extinction event. Plants with duplicated genomes were better adapted to survive dramatic environmental changes.
Recent research suggests that mass extinctions may be more common than previously thought, with 'sick Earth' extinctions being the norm. The study of five mass extinctions reveals that asteroid impacts are unlikely to have triggered most of them.
Researchers from UC Berkeley argue that devastating declines of amphibians worldwide signal a biodiversity disaster. The study highlights the impact of chytridiomycosis, habitat constriction, and pollution on frog populations, contributing to a sixth mass extinction event.
A new report details the historic mass extinction of amphibians, with extinction rates reaching unprecedented levels. The authors attribute the decline to human activities exacerbating climate change and a deadly infectious disease, chytridiomycosis.
A series of massive volcanic eruptions in India may have killed the dinosaurs 65 million years ago, rather than a meteor impact. Microscopic marine fossils found in sediments near the Bay of Bengal support this theory, directly linking the Deccan Traps to the mass extinction event.
A 250M year-old mass extinction event led to a profound ecological shift in the world's oceans. Simple marine ecosystems were largely displaced by complex ones, reflecting a rise in mobile organisms with higher metabolism. This change has continued ever since, with current human activities potentially reversing this trend.
Scientists have proposed a new theory that combines deadly sudden catastrophes (pulses) with longer, steadier pressures on species (presses) to explain Earth's mass extinctions. The Press/Pulse theory suggests that these combined events are necessary for big extinctions to occur.
A team of paleontologists proposes that the Chicxulub meteor impact was not the sole cause of the dinosaurs' demise. Instead, they suggest that a series of massive meteor impacts, volcanic eruptions, and climate change culminated in the end of the Cretaceous Period.
Researchers have found that the Deccan Traps, a massive lava flow in India, may have released climate-changing gases quickly enough to cause a deadly global climate shift. The team's study suggests that the eruptions could have contributed to the mass extinction event that wiped out the dinosaurs.
Researchers have discovered that since the 1960s, spores from living land plants show a three-fold increase in UV-B absorbing pigments to protect themselves against declining stratospheric ozone. By studying ancient plant fossils, scientists aim to measure past UV-B levels and better understand Earth's climate history.
A new study suggests that massive methane releases could have led to the extinction of up to 95% of marine species and 70% of land species. The researcher estimates that 10,000 gigatons of dissolved methane could have been released, causing catastrophic conflagrations and flooding.
Mass extinctions may not be fundamentally different from local catastrophes in their impact on global diversity. According to University of Cincinnati geologist Arnold Miller, regional and local bursts of diversification occur at different times around the world, contributing to a misleading picture of diversification trends.