Rajaniemi Tara K, Goldberg Deborah E, Turkington Roy, Dyer Andrew R
Ecol Lett. 2006 Feb;9(2):121-8. doi: 10.1111/j.1461-0248.2005.00855.x.
Much recent research explaining plant community diversity has focused on comparing the relative impacts of regional and local processes. We employed a novel analysis to quantify the effects of multiple regional and local processes on species richness, and to make quantitative comparisons of those effects across two sites that differ in plot-level species richness, productivity and environmental conditions. While abiotic stress and competition limited richness within the communities at both sites, only differences in the overall pool of species at the site, likely resulting from long-distance dispersal and climate fluctuations, explained the differences in plot-level richness between sites. Patterns in local richness may be driven by a temporal storage effect, with greater richness in the site with greater climatic variability. By identifying both the factors that impact diversity within communities and those that vary systematically across communities, our integrated approach provides a better understanding of regional diversity patterns.
近期许多解释植物群落多样性的研究都集中在比较区域和局部过程的相对影响上。我们采用了一种新颖的分析方法来量化多种区域和局部过程对物种丰富度的影响，并对两个在样地水平物种丰富度、生产力和环境条件方面存在差异的地点的这些影响进行定量比较。虽然非生物胁迫和竞争限制了两个地点群落内的丰富度，但只有地点间物种总体库的差异（可能是由长距离扩散和气候波动导致的）解释了样地水平丰富度的差异。局部丰富度模式可能由时间存储效应驱动，气候变异性较大的地点丰富度更高。通过识别影响群落内多样性的因素以及那些在群落间系统变化的因素，我们的综合方法能更好地理解区域多样性模式。
