Cite this paper:
ESCOBAR Luis E., ROMERO-ALVAREZ Daniel, LARKIN Daniel J., PHELPS Nicholas B. D.. Network analysis to inform invasive species spread among lakes[J]. HaiyangYuHuZhao, 2019, 37(3): 1037-1041

Network analysis to inform invasive species spread among lakes

ESCOBAR Luis E.1, ROMERO-ALVAREZ Daniel2, LARKIN Daniel J.3,4, PHELPS Nicholas B. D.3,4
1 Department of Fish and Wildlife Conservation, Virginia Tech, Blacksburg, Virginia, USA;
2 Department of Ecology and Evolutionary Biology-Biodiversity Institute, University of Kansas, Lawrence, USA;
3 Department of Fisheries, Wildlife, and Conservation Biology, University of Minnesota, St. Paul, Minnesota, USA;
4 Minnesota Aquatic Invasive Species Research Center, University of Minnesota, St. Paul, Minnesota, USA
Abstract:
Often facilitated by human-mediated pathways, aquatic invasive species are a threat to the health and biodiversity of global ecosystems. We present a novel approach incorporating survey data of watercraft movement in a social network analysis to reconstruct potential pathways of aquatic invasive species spread between lakes. As an example, we use the green alga Nitellopsis obtusa, also known as starry stonewort, an aquatic invasive species affecting the Great Lakes region in the United States and Canada. The movement of algal fragments via human-mediated pathways (i.e., watercraft) has been hypothesized as the primary driver of starry stonewort invasion. We used survey data collected at boat ramps during the 2013 and 2014 openwater seasons to describe the flow of watercraft from Lake Koronis, where N. obtusa was first detected in Minnesota, to other lakes in the state. Our results suggest that the risk of N. obtusa expansion is not highly constrained by geographic proximity and management efforts should consider highly connected lakes. Estimating human movement via network analysis may help to explain past and future routes of aquatic invasive species infestation between lakes and can improve evidence-based prevention and control efforts.
Key words:    Nitellopsis obtusa|starry stonewort|lake|network|invasion   
Received: 2017-08-10   Revised: 2017-10-30
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Articles by ESCOBAR Luis E.
Articles by ROMERO-ALVAREZ Daniel
Articles by LARKIN Daniel J.
Articles by PHELPS Nicholas B. D.
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