University Of Tasmania

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Designing connected marine reserves in the face of global warming

journal contribution
posted on 2023-05-19, 18:53 authored by Alvarez-Romero, JG, Munguia-Vega, A, Beger, M, del Mar Mancha-Cisneros, M, Suarez-Castillo, AN, Gurney, GG, Pressey, RL, Gerber, LR, Morzaria-Luna, HN, Reyes-Bonilla, H, Vanessa AdamsVanessa Adams, Kolb, M, Graham, EM, VanDerWal, J, Castillo-Lopez, A, Hinojosa-Arango, G, Petatan-Ramirez, D, Moreno-Baez, M, Godinez-Reyes, CR, Torre, J
Marine reserves are widely used to protect species important for conservation and fisheries and to help maintain ecological processes that sustain their populations,including recruitment and dispersal. Achieving these goals requires well-connected net works of marine reserves that maximize larval connectivity, thus allowing exchanges between populations and recolonization after local disturbances. How-ever, global warming can disrupt connectivity by shortening potential dispersal path-ways through changes in larval physiology. These changes can compromise the performance of marine reserve networks, thus requiring adjusting their design to account for ocean warming. To date, empirical approaches to marine prioritization have not considered larval connectivity as affected by global warming. Here, we develop a framework for designing marine reserve networks that integrates graph theory and changes in larval connectivity due to potential reductions in planktonic larval duration (PLD) associated with ocean warming, given current socioeconomic constraints. Using the Gulf of California as case study, we assess the benefits and costs of adjusting networks to account for connectivity, with and without ocean warming. We compare reserve networks designed to achieve representation of species and ecosystems with networks designed to also maximize connectivity undercurrent and future ocean-warming scenarios. Our results indicate that current larval connectivity could be reduced significantly under ocean warming because of shortened PLDs. Given the potential changes in connectivity, we show that our graph-theoretical approach based on centrality (eigenvector and distance-weighted fragmentation) of habitat patches can help design better-connected marine reserve net-works for the future with equivalent costs. We found that maintaining dispersal connectivity incidentally through representation-only reserve design is unlikely, particularly in regions with strong asymmetric patterns of dispersal connectivity. Our results support previous studies suggesting that, given potential reductions in PLD due to ocean warming, future marine reserve networks would require more and/or larger reserves in closer proximity to maintain larval connectivity.


Publication title

Global Change Biology








School of Geography, Planning and Spatial Sciences


Blackwell Publishing Ltd

Place of publication

9600 Garsington Rd, Oxford, England, Oxon, Ox4 2Dg

Rights statement

Copyright 2017 John Wiley & Sons Ltd.

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the environmental sciences