AEM Accepts, published online ahead of print on 30 October 2009

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Appl. Environ. Microbiol. doi:10.1128/AEM.01186-09
Copyright (c) 2009, American Society for Microbiology and/or the Listed Authors/Institutions. All Rights Reserved.

Benthic Bacterial Diversity in Submerged Sinkhole Ecosystems

Stephen C. Nold^*, Joseph B. Pangborn, Heidi A. Zajack, Scott T. Kendall, Richard R. Rediske, and Bopaiah A. Biddanda

University of Wisconsin-Stout, Menomonie WI, USA 54751; Annis Water Resources Institute, Grand Valley State University, Muskegon MI, USA 49441

^* To whom correspondence should be addressed. Email: nolds{at}uwstout.edu.

Physico-chemical characterization, ARISA community profiling, and 16S rRNA gene sequencing approaches were used to study bacterial communities inhabiting submerged Lake Huron sinkholes inundated with hypoxic, sulfate-rich groundwater. Photosynthetic cyanobacterial mats on the sediment surface were dominated by Phormidium autumnale while deeper, organic-rich sediments contained diverse and active bacterial communities.