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Adding Economou article
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erikvansebille committed Nov 14, 2024
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<h1>Peer-reviewed articles using Parcels</h1>
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Assessing spatial structure in marine populations using network theory: A case study of Atlantic sea scallop (<i>Placopecten magellanicus</i>) connectivity
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Economou, KN, WC Gentleman, KA Krumhansl, C DiBacco, D Reijnders, Z Wang, DA Lyons, B Lowen (2024),
<i>PLoS ONE</i>, <i>19</i>, e0308787.<br /> <a
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<span class="pubnum">208</span>
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Knowledge of the geographic distribution and connectivity of marine populations is essential for ecological understanding and informing management. Previous works have assessed spatial structure by quantifying exchange using Lagrangian particle-tracking simulations, but their scope of analysis is limited by their use of predefined subpopulations. To instead delineate subpopulations emerging naturally from marine population connectivity, we interpret this connectivity as a network, enabling the use of powerful analytic tools from the field of network theory. The modelling approach presented here uses particle-tracking to construct a transport network, and then applies the community detection algorithm Infomap to identify subpopulations that exhibit high internal connectivity and sparse connectivity with other subpopulations. An established quality metric, the coherence ratio, and a new metric we introduce indicating self-recruitment to subpopulations, dubbed the fortress ratio, are used to interpret community-level exchange. We use the Atlantic sea scallop (Placopecten magellanicus) in the northwest Atlantic as a case study. Results suggest that genetic lineages of P. magellanicus demonstrate spatial substructure that depends on horizontal transport, vertical motility, and suitable habitat. Our results support connectivity previously characterized on Georges Bank and Mid-Atlantic Bight. The Gulf of St. Lawrence genetic lineage is found to consist of five subpopulations that are classified as being a sink, source, permeable, or impermeable using quality metrics. This approach may be applied to other planktonic dispersers and prove useful to management.
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