Journal Article

Spatial scaling of microbial eukaryote diversity

Gillings, Michael, Holmes, Andrew J., Briscoe, David, Green, Jessica L., Westoby, Mark, Dangerfield, Mark, Beattie, Andrew J., Oliver, Ian

2004

Overview

Patterns in the spatial distribution of organisms provide important information about mechanisms that regulate the diversity of life and the complexity of ecosystems 1 , 2 . Although microorganisms may comprise much of the Earth's biodiversity 3 , 4 and have critical roles in biogeochemistry and ecosystem functioning 5 , 6 , 7 , little is known about their spatial diversification. Here we present quantitative estimates of microbial community turnover at local and regional scales using the largest spatially explicit microbial diversity data set available (> 10 6 sample pairs). Turnover rates were small across large geographical distances, of similar magnitude when measured within distinct habitats, and did not increase going from one vegetation type to another. The taxa–area relationship of these terrestrial microbial eukaryotes was relatively flat (slope z = 0.074) and consistent with those reported in aquatic habitats 8 , 9 . This suggests that despite high local diversity, microorganisms may have only moderate regional diversity. We show how turnover patterns can be used to project taxa–area relationships up to whole continents. Taxa dissimilarities across continents and between them would strengthen these projections. Such data do not yet exist, but would be feasible to collect.

• Publisher: Nature Publishing Group UK,Nature Publishing,Nature Publishing Group
• Subject: Animal, plant and microbial ecology / Aquatic habitats / Ascomycota - classification / Ascomycota - genetics / Ascomycota - physiology / Biodiversity / Biogeochemistry / Biological and medical sciences / Brackish / Continents / Ecological function / Ecology / Ecosystem / Ecosystems / Eucarya / Eukaryotic Cells - classification / Eukaryotic Cells - physiology / Freshwater / Fundamental and applied biological sciences. Psychology / Humanities and Social Sciences / letter / Marine / Microbial ecology / Microorganisms / multidisciplinary / New South Wales / Science / Science (multidisciplinary) / Soil Microbiology / Spatial distribution / Various environments (extraatmospheric space, air, water)