Author : Jake T. Kvistad
Publisher :
ISBN 13 :
Total Pages : 83 pages
Book Rating : 4.:/5 (118 download)
Book Synopsis Modeling Ballast Water Management Strategies for Slowing the Secondary Spread of Aquatic Invasive Species on the Laurentian Great Lakes by : Jake T. Kvistad
Download or read book Modeling Ballast Water Management Strategies for Slowing the Secondary Spread of Aquatic Invasive Species on the Laurentian Great Lakes written by Jake T. Kvistad and published by . This book was released on 2018 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ballast water is a leading vector for the introduction and secondary spread of aquatic invasive species in the Laurentian Great Lakes. Regional ballast water exchange between ports can accelerate the secondary spread of new aquatic invasive species once introduced, yet ballast water discharges within the Great Lakes are not well regulated. I used an iterative stochastic model to simulate management scenarios at high-priority ports in the Great Lakes shipping network to slow the secondary spread of two potential invaders, golden mussel (Limnoperna fortunei) and monkey goby (Neogobius fluviatilis). I quantified the importance of ports in governing secondary spread in the Great Lakes using graph-theoretic network analysis techniques and calculated six metrics of network centrality for 151 ports in the network: Freeman's degree centrality, indegree centrality, outdegree centrality, betweenness centrality, closeness centrality, and Eigenvector centrality. I then simulated secondary spread scenarios where hypothetical ballast water sanitation was implemented at the top twenty scoring ports in each network centrality metric, as well as the top twenty busiest ports by ship arrivals, and compared the results of each to a scenario where no management action was taken. Simulated secondary spread for both golden mussel and monkey goby resulted in significantly reduced infestation probabilities (p