Results 51 to 60 of about 399,927 (153)
Trajectories of Late Permian – Jurassic radiolarian extinction rates: no evidence for an end-Triassic mass extinction [PDF]
Fossil Record, 2011 The hypothesis that ocean acidification was a proximate trigger of the marine end-Triassic mass extinction rests on the assumption that taxa that strongly invest in the secretion of calcium-carbonate skeletons were significantly more affected by the ...
W. Kiessling, T. Danelian
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, 2018 U geološkoj prošlosti planeta Zemlje dogodilo se pet masovnih izumiranja kojima su uzroci bili velike klimatske promjene i prirodne katastrofe. Unatoč procjenama koje je teško napraviti i koje su nepouzdane, znamo da je današnja stopa izumiranja veća od ...
Vukelić, Mara
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The Initial Mass Function and Disk Frequency of the Rho Ophiuchi Cloud: An Extinction-Limited Sample
, 2011 We have completed an optical spectroscopic survey of an unbiased, extinction-limited sample of candidate young stars covering 1.3 square degrees of the Rho Ophiuchi star forming region.
Allen +58 more
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Functional diversity of marine ecosystems after the Late Permian mass extinction event [PDF]
, 2014 Article can be accessed from http://www.nature.com/ngeo/journal/v7/n3/full/ngeo2079.htmlThe Late Permian mass extinction event was the most severe such crisis of the past 500 million years and occurred during an episode of global warming.
A Baud +49 more
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No mass extinction for land plants at the Permian–Triassic transition
Nature Communications, 2019 It has been thought that land plants suffered a mass extinction along with animals at the end of the Permian. Here, Nowak et al. show that the apparent plant mass extinction is a result of biases in the fossil record and their reanalysis suggests a lower
Hendrik Nowak +2 more
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Accelerated mass extinction in an isolated biota during Late Devonian climate changes
Scientific Reports, 2021 The fossil record can illuminate factors that contribute to extinction risk during times of global environmental disturbance; for example, inferred thermal tolerance was an important predictor of extinction during several mass extinctions that ...
Jaleigh Q. Pier +4 more
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CLIMATE CHANGE IN CONTEXT: STRESS, SHOCK, AND THE CRUCIBLE OF LIVINGKIND
Zygon, 2018 An increasing number of environmentally knowledgeable observers and activists comprehend the situation faced by the emerging global civilization and its unsustainable systems, characterized by planet‐altering positive feedback loops arising from human ...
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Higher prevalence of X-ray selected AGN in intermediate age galaxies up to z~1
, 2014 We analyse the stellar populations in the host galaxies of 53 X-ray selected optically dull active galactic nuclei (AGN) at 0 ...
Aird, James +11 more
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Journal of Palaeogeography, 2014 A continuous Permian-Triassic boundary (PTB) section has been found and studied for the first time in Xiushui, Jiangxi Province, South China. Evidence for a large sea-level fall has been found in the horizon of 0.8 m below the PTB, from the beginning of ...
Ya-Sheng Wu +3 more
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Near-infrared reddening of extra-galactic GMCs in a face-on geometry
, 2008 [Abridged] We describe the near-infrared reddening signature of giant molecular clouds (GMCs) in external galaxies. In particular, we examine the E(J-H) and E(H-K) color-excesses, and the effective extinction law observed in discrete GMC regions. We also
Berlind +22 more
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