Striebel Maren, Behl Stephan, Diehl Sebastian, Stibor Herwig
Department Biology II, Aquatic Ecology, Ludwig-Maximilians-Universität München, Grosshaderner Strasse 2, 82152 Planegg-Martinsried, Germany.
Am Nat. 2009 Jul;174(1):141-7. doi: 10.1086/599294.
Positive effects of biodiversity on ecosystem function are described from an increasing number of systems, but the underlying mechanisms frequently remain elusive. A truly predictive understanding of biodiversity-ecosystem function relationships requires the a priori identification of traits conferring specific (and possibly complementary) functions to individual species. Although planktonic organisms are responsible for approximately half of the world's primary production, few studies have reported on the relationship between phytoplankton biodiversity and planktonic primary production. We argue that taxon-specific differential equipment with photosynthetically active pigments provides a biochemical mechanism of resource use complementarity among phototrophic microorganisms, enabling more diverse communities to more completely harvest the light spectrum. In line with this, more diverse phytoplankton communities showed higher pigment diversity, higher biomass-specific light absorbance, and higher rates of primary production and biomass accrual.
越来越多的系统都描述了生物多样性对生态系统功能的积极影响，但其潜在机制常常仍不明确。要真正预测性地理解生物多样性与生态系统功能的关系，就需要事先确定赋予单个物种特定（且可能互补）功能的性状。尽管浮游生物贡献了全球约一半的初级生产，但很少有研究报道浮游植物生物多样性与浮游初级生产之间的关系。我们认为，光合活性色素在分类群上的特异性差异配备为光合微生物之间的资源利用互补提供了一种生化机制，使更多样化的群落能够更全面地捕获光谱。与此一致的是，更多样化的浮游植物群落表现出更高的色素多样性、更高的单位生物量光吸收率以及更高的初级生产速率和生物量积累速率。
