Beta-, alpha- and gamma-diversity over time (1990–2011).Janina PagelAlejandro MartínezAbraínJuan Antonio GómezJuan JimenezDaniel Oro
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...
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 ...
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 ...
Assessment of biodiversity in a changing world is a key issue and studies on the processes and factors influencing its history at relevant time scales are needed. In this study, we analyzed temporal trends of plant diversity using fossil pollen records f
七、系统发育多样性(Phylogenetic diversity) 谱系多样性(Phylogenetic diversity,PD)定义为在系统发育树上跨越给定的一组分类群所经过的所有系统发育分支的最小总长度(Faith,1992)。以下使用原作者文章中的一张图对谱系多样性作简要说明,对于更多详细内容,可参考原文章。
Gamma-delta T cells are primarily found within the epithelium. They show less TCR diversity and recognize antigens differently than alpha-beta T cells. Subsets of gamma-delta T cells have shown antitumor and immunoregulatory activity. 仅用于科研。不用于诊断过程。未经明确授权不得转售。 This i...
Gamma-delta T cells are primarily found within the epithelium. They show less TCR diversity and recognize antigens differently than alpha-beta T cells. Subsets of gamma-delta T cells have shown antitumor and immunoregulatory activity. 仅用于科研。不用于诊断过程。未经明确授权不得转售。 This i...
The influence of deteriorating global climate through the Neogene appears to be offset by a steepening latitudinal diversity gradient and an associated increased late Neogene provinciality.HENDY, Austin J.WPaleontology III Geographic Diversity Patterns...
but the timing is different as it occurs during viral assembly and/or release from the cell. The mechanism of reverse transcription allows for high rates of recombination and genetic diversity for many of the retroviruses. The high rate of genetic variationin vivocan lead to formation of aquasis...