2007. Phyto- plankton diversity (alpha, beta, and gamma) from the Araguaia River tropical floodplain lakes (central Brazil). Hydrobiologia 557: 455-461.Nabout, J. C., Nogueira, I. S., Oliveira, L. G., and Morais, R. R. (2007). Phytoplankton diversity (alpha, beta, and gamma) ...
613Alpha, Beta, or Gamma: Where Does All the Diversity Go? (1988)J. J. Sepkoski Jr.Commentarypeter wagnerSifting through the works of an outstandingscientist is not unlike going through the record-ings of a great rock band. There are, of course,the big “hits” that everyone associates ...
The latitudinal distribution patterns of alpha, beta and gamma diversity of reptiles, amphibians and herpetofauna were analyzed using individual binary models of potential distribution for 301 species predicted by ecological modelling for a grid of 9,932 quadrants of ~25 km2 each. We arranged ...
Species diversity may be additively partitioned within and among samples (alpha and beta diversity) from hierarchically scaled studies to assess the proportion of the total diversity (gamma) found in different habitats, landscapes, or regions. We developed a statistical approach for testing null hypoth...
Beta diversity, rather than alpha diversity per se, appears to be the main driver of spatial differences in gamma diversity between temperate and tropical regions. Conversely, we observed high plant alpha diversity at fine grains but relatively low alpha diversity at coarse grains in many temperate...
Alpha (α) keratins are found in all vertebrates, while beta (β) keratins are found exclusively in reptiles and birds. We have studied the molecular evolution of these gene families in the genomes of 48 phylogenetically diverse birds and their expression in the scales and feathers of the ...
WHERE DOES ALL THE DIVERSITY GO AGAIN? A CENOZOIC PERSPECTIVE ON VARIATIONS IN ALPHA, BETA AND GAMMA DIVERSITY IN SHALLOW MARINE ENVIRONMENTSFluctuations in regional endemism and biogeographic similarity between regions appear related to the opening and closing of major oceanic gateways. Nevertheless some...
Beta多样性(β多样性),即在一个梯度上从一个生境到另一个生境所发生的种的多样性变化的速率和范围。它是研究群落之间的种多度关系。 Gamma多样性(γ多样性),即在一个地理区域内(例如一个岛屿)一系列生境中种的多样性。它通过这些生境的α多样性和生境之间的β多样性的研究范围结合起来表示。
(alpha-, beta-, gamma-, mu- and nu-papillomaviruses). Alpha-papillomaviruses contain the vast majority of those HPV types that affect human health. Approximately 60 HPV types comprise this genus, and these include those HPV types that are most frequently found in common warts (HPV-2, 27, ...
compensates for disease (ref5). T Cell and TCR Diversity Most human T cells express the TCR alpha-beta and either CD4 or CD8 molecule (single positive, SP). A small number of T cells lack both CD4 and CD8 (double negative, DN). Increased percentages of alpha-beta DN T ce...