Journal
ENVIRONMENTAL MICROBIOLOGY
Volume 18, Issue 6, Pages 2001-2009Publisher
WILEY
DOI: 10.1111/1462-2920.13216
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Funding
- National Science Foundation [DGE-0801720]
- Marine Ecosystem Sustainability in the Arctic and Subarctic (MESAS) IGERT [1303901]
- Arctic Region Supercomputing Center at the University of Alaska Fairbanks
- Office of Polar Programs (OPP)
- Directorate For Geosciences [1303901] Funding Source: National Science Foundation
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Climate change is altering Arctic ecosystem structure by changing weather patterns and reducing sea ice coverage. These changes are increasing light penetration into the Arctic Ocean that are forecasted to increase primary production; however, increased light can also induce photoinhibition and cause physiological stress in algae and phytoplankton that can favour disease development. Fungi are voracious parasites in many ecosystems that can modulate the flow of carbon through food webs, yet are poorly characterized in the marine environment. We provide the first data from any marine ecosystem in which fungi in the Chytridiomycota dominate fungal communities and are linked in their occurrence to light intensities and algal stress. Increased light penetration stresses ice algae and elevates disease incidence under reduced snow cover. Our results show that chytrids dominate Arctic marine fungal communities and have the potential to rapidly change primary production patterns with increased light penetration.
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