Abstract


SALINITY AND “ECO-TYPE” CONSTRAINTS ON BENTHIC MICROBIAL COMMUNITIES

In the San Francisco Estuary (SFE), benthic microbial communities have been infrequently studied. These communities influence the biogeochemistry of the estuary and impact the food web from the bottom-up. To determine the different functional groups of the microbial communities, 16S ribosomal DNA (rDNA) sequencing of benthic samples was performed. Large benthic cores were taken to determine nutrient fluxes and 16S rDNA samples were taken directly from the cores. By analyzing the benthic microbial community in tandem with nutrient fluxes of the benthic cores an extensive picture of the dynamic benthos will be constructed. Cores were taken from 5 locations over a salinity gradient. One location, Blacklock Marsh, is a 70 acre recently restored marsh that was selected for sampling of three “eco-types” (vegetated, channels, shallow ponds). The microbial communities from these locations are expected to vary by both salinity gradient and by “eco-type”as well as with nutrient flux. This analysis will provide one of the first documentations of the key microbial players of the SFE benthic communities and consequently give insight into future restoration as benthic habitat increases in wetlands.

Authors

Lee, T. L., Romberg Tiburon Center- San Francisco State University, USA, triciall@mail.sfsu.edu

Tas, N., Lawrence Berkeley National Laboratory, USA

Falcon, L. I., Universidad Nacional Autonoma de Mexico, Mexico

Parker, A. E., California Maritime Academy, USA

Cornwell, J., University of Maryland Center for Environmental Studies, USA

Wilkerson, F. P., Romberg Tiburon Center- San Francisco State University

Details

Poster presentation

Session #:075
Date: 2/26/2015
Time: 18:30 - 20:00
Location: Poster/Exhibit Hall

Presentation is given by student: Yes

PosterID: 322