EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/21/2019 | 2:45 PM - 3:00 PM | BIOGEOGRAPHY OF BACTERIA IN HEADWATER STREAMS ACROSS BIOMES AND SEASONS | 150 G
BIOGEOGRAPHY OF BACTERIA IN HEADWATER STREAMS ACROSS BIOMES AND SEASONS
Benthic microbial communities of headwater streams conduct important processes for
maintaining critical stream ecosystem functions both within headwaters and downstream. Not all
headwater communities are equal and there is a growing effort to understand which factors are
responsible for differences among them and more generally to understand the utility and
limitations of bacterial biogeography information. Using three well-studied catchments, White
Clay Creek (PA, USA), Neversink River (NY, USA) and Rio Tempisquito (Costa Rica), we
examined the influence of catchment, season, substrate type (rock vs. sediment), stream order,
and water chemistry on the composition of streambed microbial communities characterized by
16S rRNA genes. The direction and magnitude of change in bacterial richness between stream
orders depended on catchment, substrate, and season. Partial redundancy analysis showed that
substrate type (8.1%) was more influential than catchment (4.6%), season (1.8%), and stream
order (1.5%) in structuring bacterial community composition. Relative abundance of
Cyanobacteria was seven times greater in rock biofilms than sediments, while Acidobacteria had
twice the relative abundance in sediments compared with rock biofilms. Our results suggest that
changes in benthic substrate could substantially alter the biogeography of bacteria in headwater
streams, globally.
- Biodiversity
- Distribution
- Sediment
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Presenters/Authors
Raven Bier
(), Stroud Water Research Center, raven.bier@gmail.com;
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Jennifer Mosher
(), Marshall University, mosher@marshall.edu;
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Louis Kaplan
(), Stroud Water Research Center, lakaplan@stroudcenter.org;
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Jinjun Kan
(), Stroud Water Research Center, jkan@stroudcenter.org;
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