Results 31 to 40 of about 195,388 (199)
Selection, Subdivision and Extinction and Recolonization [PDF]
Genetics, 2004 Abstract In a subdivided population, the interaction between natural selection and stochastic change in allele frequency is affected by the occurrence of local extinction and subsequent recolonization. The relative importance of selection can be diminished by this additional source of stochastic change in allele frequency.
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Peak shifts and extinction under sex-specific selection [PDF]
Biology Letters, 2021 A well-known property of sexual selection combined with a cross-sex genetic correlation ( r mf ) is that it can facilitate a peak shift on the adaptive landscape. How do these diversifying effects of sexual selection + r mf balance with the constraints imposed by such ...
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SpeX Near-infrared Spectroscopic Extinction Curves in the Milky Way
The Astrophysical Journal, 2022 Interstellar dust extinction curves provide valuable information about dust properties, including the composition and size of the dust grains, and are essential to correct observations for the effects of interstellar dust.
Marjorie Decleir +9 more
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Extinction ratios in the inner Galaxy as revealed by the VVV survey [PDF]
, 2017 Accepted for publication in ApJ Letters, 10 pages, 3 Figures, 2 Tables © 2017 The American Astronomical Society. All rights reserved.Interstellar extinction towards the Galactic Center is large and significantly differential.
Alonso-García, Javier +9 more
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Interstellar Extinction from Large Surveys
Open Astronomy, 2003 Under some assumptions, information on interstellar extinction may be obtained from modern large photometric survey data. Virtual Observatory facilities allow users to make a fast and correct cross-identification of objects from various surveys.
Malkov O. Yu.
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Relaxation of selective constraints causes independent selenoprotein extinction in insect genomes. [PDF]
PLoS ONE, 2008 BACKGROUND: Selenoproteins are a diverse family of proteins notable for the presence of the 21st amino acid, selenocysteine. Until very recently, all metazoan genomes investigated encoded selenoproteins, and these proteins had therefore been believed to ...
Charles E Chapple, Roderic Guigó
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Hubble Tarantula Treasury Project. IV. The extinction law [PDF]
, 2015 We report on the study of interstellar extinction across the Tarantula nebula (30 Doradus), in the Large Magellanic Cloud, using observations from the Hubble Tarantula Treasury Project in the 0.3 - 1.6 micron range. The considerable and patchy extinction
Aloisi, Alessandra +12 more
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When does Evolution by Natural Selection Prevent Extinction? [PDF]
Evolution, 1995 Understanding population responses to novel environments is a central concern of both evolutionary biology and ecology (Maynard Smith 1989; Bradshaw 1991; Hoffman and Parsons 1991; Peters and Lovejoy 1992; Kareiva et al. 1993). Populations subject to substantial environmental stress, such as occurs during colonization attempts, human-mediated ...
Richard, Gomulkiewicz, Robert D, Holt
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Variations of the Ratio of Total-To-selective Extinction in the Galaxy
Open Astronomy, 2003 The results of the study of variations of total-to-selective extinction RV near the Galactic plane (-12° ≤ b ≤+12°) are presented. It is shown that variations of RV range from 1.9 to 3.4 and it is not possible to determine its typical value for the ...
Sūdžius J., Raudeliūnas S.
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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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