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Mostrando ítems 61-70 de 1505
Ecological and evolutionary legacy of megafauna extinctions
(2018-05-01)
For hundreds of millions of years, large vertebrates (megafauna) have inhabited most of the ecosystems on our planet. During the late Quaternary, notably during the Late Pleistocene and the early Holocene, Earth experienced ...
Observing responses and resistance to extinctionRespuestas de observación y resistencia a la extinción
(Sociedad Mexicana de Análisis de la Conducta / Mexican Society of Behavior Analysis, 2011)
Phenomenon of primary and secondary extinction in textured material
(Revista Mexicana de Física, 2009)
The species-fragmented area relationship
(National Academy Of Sciences, 2013-07)
The species–area relationship (SAR) gives a quantitative description of the increasing number of species in a community with increasing area of habitat. In conservation, SARs have been used to predict the number of extinctions ...
Mass extinctions drove increased global faunal cosmopolitanism on the supercontinent Pangaea
(Nature Publishing Group, 2017-12)
Mass extinctions have profoundly impacted the evolution of life through not only reducing taxonomic diversity but also reshaping ecosystems and biogeographic patterns. In particular, they are considered to have driven ...
Megafauna and ecosystem function from the Pleistocene to the Anthropocene
(Natl Acad Sciences, 2016-01-26)
Large herbivores and carnivores (the megafauna) have been in a state of decline and extinction since the Late Pleistocene, both on land and more recently in the oceans. Much has been written on the timing and causes of ...
On the Source of the Dust Extinction in Type Ia Supernovae and the Discovery of Anomalously Strong Na I Absorption
(The American Astronomical Society, 2013-11-10)
High-dispersion observations of the Na i D λλ5890, 5896 and K i λλ7665, 7699 interstellar lines, and the diffuse
interstellar band at 5780 Å in the spectra of 32 Type Ia supernovae are used as an independent means of ...
Efectos de la frecuencia de reforzamiento y la duración del componente de extinción en un programa de reforzamiento mixto sobre las respuestas de observación en ratasEffects of reinforcement frequency and extinction- component duration within a mixed schedule of reinforcement on observing responses in rats
(Sociedad Mexicana de Análisis de la Conducta / Mexican Society of Behavior Analysis, 2011)
Beyond species loss: the extinction of ecological interactions in a changing world
(John Wiley, 2015)
1. The effects of the present biodiversity crisis have been largely focused on the loss of species.
However, a missed component of biodiversity loss that often accompanies or even precedes
species disappearance is the ...
Frugivores at higher risk of extinction are the key elements of a mutualistic network
(Ecological Soc Amer, 2014-12-01)
Most tree species rely on vertebrates for seed dispersal, and many vertebrates use fruits as food resources in tropical forests. Therefore, plant-frugivore interactions affect population dynamics and persistence in ecological ...