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Vincent Denef Ecology and Evolutionary Biology, University of Michigan
Water @ Michigan
January 21, 2016
The difference a species makes: impact of invasive species on freshwater microbial
communities
@VJDenef
The difference a species makes
Texasinvasives.org
Invasion of the Dreissenids
[Credit: Nalepa, GLERL
Invasion of the Dreissenids The difference a species makes
[Higgins, Ecol Mono, 2010] Bacteria 0 ? ? ?
Invasion of the Dreissenids The difference a species makes
Biota Phytoplankton Micro/nanozooplankton Phototrophic
bacteria
Ecosystem impacts
Chemotrophic Bacteria (benthic-pelagic)
Microbial higher food web connectivity
Geochemical cycling (e.g. CO2 efflux)
[Buffam et al, GCB, 2011]
July 99 July 10
[Credit: Vanderploeg, GLERL]
Chl a concentration
Impacts on bacterial communities
[Credit: Vanderploeg, GLERL]
Harmful algal blooms (e.g., Microcystis)
The difference a species makes
Source water: Lake MI M45, 100 micron pre-filtered Quagga mussels: Lake MI M45, cleaned and acclimated in lab for 12 hrs
20L
3 hrs 4 C
20L
20L
20L
X 3
X 4
X 3
X 4
16S rRNA V4 sequencing
Tom Johengen Hank Vaderploeg
Experimental design Feeding experiments
* = statistically significant difference (LEfSe, p < 0.05)
Impacts on bacterial communities: feeding experiment Feeding experiments
Impacts on bacterial communities: field observations Field observations
Impacts on bacterial communities: field observations Field observations
Acknowledgments
NOAA GLERL Ashley Baldridge Joann Cavaletto Jim Liebig Ed Rutherford Henry Vanderploeg Crew of the R/V Laurentian
University of Michigan Michelle Berry Ashley Burtner Edna Chiang * Seana Florida * Masanori Fujimoto *** Thomas Johengen Ann McCarthy Ryan Keeling * Morgan Meade * Justin Millar Tom Nalepa Danna Palladino Marian Schmidt ** Amelia Waters * Amadeus Twu *
Support
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