Details

Autor(en) / Beteiligte

• Ruiz‐González, Clara
• Niño‐García, Juan Pablo
• Giorgio, Paul A
• Fierer, Noah

Titel

Terrestrial origin of bacterial communities in complex boreal freshwater networks

Ist Teil von

• Ecology letters, 2015-11, Vol.18 (11), p.1198-1206

Ort / Verlag

England: Blackwell Science

Erscheinungsjahr

2015

Quelle

Wiley Online Library

Beschreibungen/Notizen

• Bacteria inhabiting boreal freshwaters are part of metacommunities where local assemblages are often linked by the flow of water in the landscape, yet the resulting spatial structure and the boundaries of the network metacommunity have never been explored. Here, we reconstruct the spatial structure of the bacterial metacommunity in a complex boreal aquatic network by determining the taxonomic composition of bacterial communities along the entire terrestrial/aquatic continuum, including soil and soilwaters, headwater streams, large rivers and lakes. We show that the network metacommunity has a directional spatial structure driven by a common terrestrial origin of aquatic communities, which are numerically dominated by taxa recruited from soils. Local community assembly is driven by variations along the hydrological continuum in the balance between mass effects and species sorting of terrestrial taxa, and seems further influenced by priority effects related to the spatial sequence of entry of soil bacteria into the network.