Global warming has caused severe climatic drying in southwestern Australia since the 1970s, so we aimed to determine whether lakes in this region showed impacts on lake hydroperiod, water quality, and α, β and γ diversity of lake invertebrates from 1998 to 2011. Seventeen lakes across a ...
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 ...
1. 物种丰富度 (Richness)---不考虑丰度,即样本中有多少个物种,衡量指标包括Obs,Chao1和Ace。 2. 物种多样性 (Diversity)---将物种个数和物种的丰度全部考虑在内的多样性,衡量指标包括Shannon和Simpson。 3. 物种均匀度 (Eveness)---这些物种的丰度分布情况,衡量指标包括Shannon和Simpson等。 这五个指标说的...
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...
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...
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 ...
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。 (图片来源,Jurasinski and Beierkuhnlein,2009) 对于Alpha多样性而言,常通过一系列的指数来表征。通过比较这些Alpha多样性指数的高低,判断群落物种多样性水平...
additive partitioningalpha, beta, and gammadata simulationdiversity partitioningmultiplicative partitioningstatistical independenceEcology. 2010 Jul;91(7):1969-74. ... J Lou - 《Ecology》 被引量: 170发表: 2010年 Multiplicative partition of true diversity yields independent alpha and beta components; addi...
Additive partitioning of rarefaction curves and species-area relationships: unifying alpha-, beta- and gamma-diversity with sample size and habitat area. Additive partitioning of species diversity is widely applicable to different kinds of sampling regimes at multiple spatial and temporal scales. In addi...
1)alpha diversityalpha多样性 1.Additive partition of diversity approach is used to analyzing the relative contribution ofalpha diversityand beta diversity to gamma diversity of plant species in oak(Quercus liaotungensis) forest in a quadrat,slpoe positon,slope three scales hierarchical sampling system...