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U.S. Geological Survey - Great Lakes Science Center

Dawn Shively

Profile

Associate Scientist - Ecology Lake Michigan Ecological Station Email: dshivley@usgs.gov Phone: (219) 926-8336 ext. 427 Fax: (219) 929-5792

Education:

B.S. (Biology) Indiana University NW, Indiana, 2001

Current Studies

Recent Publications

Chan Lan Chuna, Julie R. Peller, Dawn Shively, Muruleedhara N. Byappanahalli, Richard L. Whitman, Christopher Staley, Qian Zhang, Satoshi Ishii, and Michael J. Sadowsky 2017. Virulence and biodegradation potential of dynamic microbial communities associated with decaying Cladophora in Great Lakes. Elsevier . Science of the Total Environment . 574 872-880.
Contribution #2089
Meredith B. Nevers, Kasia Przybyla-Kelly, Ashley Spoljaric, Dawn Shively, Richard L. Whitman, and Muruleedhara N. Byappanahalli 2016. Freshwater wrack along Great Lakes coasts harbors Escherichia coli: Potential for bacterial transfer between watershed environments. Elsevier . Journal of Great Lakes Research . 42 (4). 760-767.
Contribution #2036
Muruleedhara N. Byappanahalli, Meredith B. Nevers, Richard L. Whitman, Zhongfu Ge, Dawn Shively, Ashley Spoljaric, Katarzyna Przybyla-Kelly 2015. Wildlife, urban inputs, and landscape configuration are responsible for degraded swimming water quality at an embayed beach. Elsevier . Journal of Great Lakes Research . 41 (1). 156-163.
Contribution #1894
Peller, Julie R., Muruleedhara N. Byappanahalli, Dawn Shively, Michael J. Sadowsky, Chan Lan Chun, Richard L. Whitman 2014. Notable decomposition products of senescing Lake Michigan Cladophora glomerata. Massive accumulations of Cladophora, a ubiquitous, filamentous green alga, have been increasingly reported along Great Lakes shorelines, negatively affecting beach aesthetics, recreational activities, public health and beachfront property values. Previously, the decomposition byproducts of decaying algae have not been thoroughly examined. To better understand the negative consequences and potential merit of the stranded Cladophora, a three month mesocosm study of the dynamic chemical environment of the alga was conducted using fresh samples collected from southern Lake Michigan beaches. Typical fermentation products, such as organic acids, sulfide compounds, and alcohols were detected in the oxygen–deprived algae. Short chain carboxylic acids peaked on day seven, in correspondence with the lowest pH value. Most low molecular mass carbon compounds were eventually consumed, but 4-methylphenol, indole, and 3-methylindole were detected throughout the incubation period. Natural oils were detected in fresh and decomposing algae, indicating the stable nature of these compounds. The mesocosm experiment was validated by directly sampling the fluid within decomposing Cladophora mats in the field; many of the same compounds were found. This study suggests that the problematic Cladophora accumulations may be harvested for useful byproducts, thereby reducing the odiferous and potentially harmful mats stranded along the shorelines. . Journal of Great Lakes Research . 40 (3). 800-806.
Contribution #1845
Richard L. Whitman, Muruleedhara N. Byappanahalli, Ashley M. Spoljaric, Kasia Przybyla-Kelly, Dawn A. Shively, Meredith B. Nevers 2014. Evidence for free-living Bacteroides in Cladophora along the shores of the Great Lakes. Inter-Research Science Center . Aquatic Microbial Ecology . 72 (2). 117-126.
Contribution #1824

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