Type of Presentation

Poster

Session Title

General species and food webs

Description

We have observed filamentous bacteria on the surface of sediments and other substrates (e.g., rocks, crabs) in nearshore areas of Commencement Bay, WA. These areas have been found to have high amounts of wood debris (from former sawmills) buried in the sediments, and decomposition by sulfate-reducing bacteria has created a very high sulfide environment (> 1 mM) in sediment porewater and where streams of water are seeping from intertidal sediments at low tide. The objective of this study was to use microscopy (SEM, FISH) and genetic methods (cloning and sequencing, next generation sequencing) to compare the diversity, distribution, and abundance of bacteria on these different substrates. There were significant differences in the types of bacteria and their relative abundances between sand, rocks and crabs. Sulfide-oxidizing bacteria were the most common members of the microbial communities, and they were closely related to those found on deep sea hydrothermal vents. These microbial communities are amenable to detailed experimental study, which will provide insight into ecological relationships of microbes in high sulfide environments.

This document is currently not available here.

Share

COinS
 

Bacterial Diversity at Anthropogenic Sulfide Seeps in Commencement Bay, WA

2016SSEC

We have observed filamentous bacteria on the surface of sediments and other substrates (e.g., rocks, crabs) in nearshore areas of Commencement Bay, WA. These areas have been found to have high amounts of wood debris (from former sawmills) buried in the sediments, and decomposition by sulfate-reducing bacteria has created a very high sulfide environment (> 1 mM) in sediment porewater and where streams of water are seeping from intertidal sediments at low tide. The objective of this study was to use microscopy (SEM, FISH) and genetic methods (cloning and sequencing, next generation sequencing) to compare the diversity, distribution, and abundance of bacteria on these different substrates. There were significant differences in the types of bacteria and their relative abundances between sand, rocks and crabs. Sulfide-oxidizing bacteria were the most common members of the microbial communities, and they were closely related to those found on deep sea hydrothermal vents. These microbial communities are amenable to detailed experimental study, which will provide insight into ecological relationships of microbes in high sulfide environments.