Program and Agenda

Abstract

META2GENOMICS - AN INTEGRATED VIEW ON MICROBIAL COMMUNITIES OF THE EASTERN TROPICAL SOUTH PACIFIC OXYGEN MINIMUM ZONE

Oxygen minimum zones (OMZs) are oceanic features characterized by high production and low oxygen concentrations favoring anaerobic pathways in microbial nitrogen and sulfur metabolism. The world’s largest OMZ is located in the Eastern Tropical South Pacific (ETSP) due to biological processes driven by upwelling off the South American coast. We compare the first open-ocean OMZ microbial metagenome (sampled ~360 km off Peru, ~4700 m bottom depth) to several publicly available metagenomic datasets from the ETSP OMZ, including a highly sulfidic coastal station. By means of multivariate statistics and ordination techniques, we demonstrate that distribution patterns of microbial communities across the OMZ are strikingly similar at the taxonomic and functional level and largely governed by the environmental variables depth, NH4+ and NO2-. Further, we show that microbial taxa can be grouped into five clusters which represent distinct OMZ habitats. Corresponding clustering of genes yields a distribution pattern similar to that of microbial taxa, underpinning that function follows taxonomy. Our results provide a novel, integrated view on OMZ microbiology, linking microbial community structure to environmental variables and genetic inventory underlying biogeochemical processes.

Authors

Neulinger, S. C., Institute for General Microbiology, Christian Albrecht University Kiel, Germany, sneulinger@ifam.uni-kiel.de

Löscher, C. R., Institute for General Microbiology, Christian Albrecht University Kiel, Germany, cloescher@ifam.uni-kiel.de

Schunck, H., GEOMAR | Helmholtz Centre for Ocean Research Kiel, Germany, hschunck@geomar.de

LaRoche, J., Dalhousie University, Department of Biology, Canada, Julie.Laroche@dal.ca

Schmitz, R. A., Institute for General Microbiology, Christian Albrecht University Kiel, Germany, rschmitz@ifam.uni-kiel.de

Details

Oral presentation

Session #:111
Date: 2/25/2014
Time: 15:15
Location: 313 A

Presentation is given by student: No