Institut für Populationsgenetik, Veterinärmedizinische Universität Wien, Veterinärplatz 1, A-1210 Vienna, Austria.
Mol Ecol. 2010 Jul;19(14):2908-15. doi: 10.1111/j.1365-294X.2010.04669.x. Epub 2010 Jul 1.
With the advent of molecular methods, it became clear that microbial biodiversity had been vastly underestimated. Since then, species abundance patterns were determined for several environments, but temporal changes in species composition were not studied to the same level of resolution. Using massively parallel sequencing on the 454 GS FLX platform we identified a highly dynamic turnover of the seasonal abundance of protists in the Austrian lake Fuschlsee. We show that seasonal abundance patterns of protists closely match their biogeographic distribution. The stable predominance of few highly abundant taxa, which previously led to the suggestion of a low global protist species richness, is contrasted by a highly dynamic turnover of rare species. We suggest that differential seasonality of rare and abundant protist taxa explains the--so far--conflicting evidence in the 'everything is everywhere' dispute. Consequently temporal sampling is basic for adequate diversity and species richness estimates.
随着分子方法的出现，微生物生物多样性被大大低估的情况变得清晰起来。从那时起，已经确定了几种环境中的物种丰度模式，但对物种组成的时间变化没有进行同样分辨率的研究。我们使用 454 GS FLX 平台上的大规模平行测序，确定了奥地利福施尔湖浮游生物季节性丰度的高度动态变化。我们表明，浮游生物的季节性丰度模式与其生物地理分布密切匹配。少数高度丰富的类群的稳定优势，先前导致了全球浮游生物物种丰富度较低的建议，与稀有物种的高度动态变化形成鲜明对比。我们认为，稀有和丰富的浮游生物类群的季节性差异解释了目前在“万物皆在”争议中的矛盾证据。因此，时间采样是获得充分多样性和物种丰富度估计的基础。
