Microbial ecosystems are dominated by specialist taxa

Mariadassou, Mahendra and Pichon, Samuel and Ebert, Dieter. (2015) Microbial ecosystems are dominated by specialist taxa. Ecology letters, 18 (9). pp. 974-982.

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Official URL: http://edoc.unibas.ch/40755/

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Abundance and specificity are two key characteristics of species distribution and biodiversity. Theories of species assembly aim to reproduce the empirical joint patterns of specificity and abundance, with the goal to explain patterns of biodiversity across habitats. The specialist-generalist paradigm predicts that specialists should have a local advantage over generalists and thus be more abundant. We developed a specificity index to analyse abundance-specificity relationships in microbial ecosystems. By analysing microbiota spanning 23 habitats from three very different data sets covering a wide range of sequencing depths and environmental conditions, we find that habitats are consistently dominated by specialist taxa, resulting in a strong, positive correlation between abundance and specificity. This finding is consistent over several levels of taxonomic aggregation and robust to errors in abundance measures. The relationship explains why shallow sequencing captures similar β-diversity as deep sequencing, and can be sufficient to capture the habitat-specific functions of microbial communities.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Integrative Biologie > Evolutionary Biology (Ebert)
UniBasel Contributors:Ebert, Dieter and Pichon, Samuel
Item Type:Article, refereed
Article Subtype:Book Review
Note:Publication type according to Uni Basel Research Database: Journal item
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Last Modified:09 Aug 2016 08:13
Deposited On:09 Aug 2016 08:13

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