Long-Distance Benefits of Marine Reserves: Myth or Reality?

Manel, Stéphanie; Loiseau, Nicolas; Andrello, Marco; Fietz, Katharina; Goñi, Raquel; Forcada, Aitor; Lenfant, Philippe; Kininmonth, Stuart; Marcos, Concepción; Marques, Virginie; Mallol, Sandra; Pérez-Ruzafa, Ángel; Breusing, Corinna; Puebla, Oscar; Mouillot, David

doi:10.1016/j.tree.2019.01.002

Cited by 56 publications

(72 citation statements)

References 105 publications

(124 reference statements)

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“…There is a body of evidence suggesting that FPAs can play an important role for fisheries management, especially for SSFs (Di Franco et al., 2016; Januchowski‐Hartley, Graham, Cinner, & Russ, 2013; Russ & Alcala, 2011). Two ecological processes can drive fishery benefits of FPAs: population replenishment through larval subsidies (Manel et al., 2019; Marshall, Gaines, Warner, Barneche, & Bode, 2019) and the spillover of fish biomass from protected areas to surrounding fishing grounds (Rowley, 1994). While both processes require populations to firstly recover within the boundaries of the FPAs, generally the former is key to the long‐term persistence of exploited populations also at relatively large distances from the MPA (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…While both processes require populations to firstly recover within the boundaries of the FPAs, generally the former is key to the long‐term persistence of exploited populations also at relatively large distances from the MPA (i.e. hundreds of kilometres, Manel et al, 2019), while the latter produces faster benefits to fisheries mainly across shorter distances (Halpern, Lester, & Kellner, 2010). The spatio‐temporal scale of these two processes is species‐specific (Green et al., 2015; McCauley et al., 2015).…”

Section: Introductionmentioning

confidence: 99%

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Assessing spillover from marine protected areas and its drivers: A meta‐analytical approach

et al. 2020

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Overfishing may seriously impact fish populations and ecosystems. Marine protected areas (MPAs) are key tools for biodiversity conservation and fisheries management, yet the fisheries benefits remain debateable. Many MPAs include a fully protected area (FPA), restricting all activities, within a partially protected area (PPA) where potentially sustainable activities are permitted. An effective tool for biodiversity conservation, FPAs, can sustain local fisheries via spillover, that is the outward export of individuals from FPAs. Spillover refers to both: “ecological spillover”: outward net emigration of juveniles, subadults and/or adults from the FPA; and “fishery spillover”: the fraction of ecological spillover that directly benefits fishery yields and revenues through fishable biomass. Yet, how common is spillover remains controversial. We present a meta‐analysis of a unique global database covering 23 FPAs worldwide, using published literature and purposely collected field data, to assess the capacity of FPAs to export biomass and whether this response was mediated by specific FPA features (e.g. size, age) or species characteristics (e.g. mobility, economic value). Results show fish biomass and abundance outside FPAs was higher: (a) in locations close to FPA borders (<200 m) than further away (>200 m); (b) for species with a high commercial value; and (c) in the presence of PPA surrounding the FPA. Spillover was slightly higher in FPAs that were larger and older and for more mobile species. Based on the broadest data set compiled to date on marine species ecological spillover beyond FPAs' borders, our work highlights elements that could guide strategies to enhance local fishery management using MPAs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessing spillover from marine protected areas and its drivers: A meta‐analytical approach

et al. 2020

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“…Indeed, the cost of sampling and genotyping a sufficient number of individuals within species has limited our understanding of the determinants of intraspecific genetic diversity, particularly at large scale. Spatial patterns of genetic diversity are mainly documented locally or regionally, mostly for a single species or a few species in phylogeographic 6 or landscape genetics studies 7,8 .…”

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confidence: 99%

Global determinants of freshwater and marine fish genetic diversity

et al. 2020

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Genetic diversity is estimated to be declining faster than species diversity under escalating threats, but its spatial distribution remains poorly documented at the global scale. Theory predicts that similar processes should foster congruent spatial patterns of genetic and species diversity, but empirical studies are scarce. Using a mined database of 50,588 georeferenced mitochondrial DNA barcode sequences (COI) for 3,815 marine and 1,611 freshwater fish species respectively, we examined the correlation between genetic diversity and species diversity and their global distributions in relation to climate and geography. Genetic diversity showed a clear spatial organisation, but a weak association with species diversity for both marine and freshwater species. We found a predominantly positive relationship between genetic diversity and sea surface temperature for marine species. Genetic diversity of freshwater species varied primarily across the regional basins and was negatively correlated with average river slope. The detection of genetic diversity patterns suggests that conservation measures should consider mismatching spatial signals across multiple facets of biodiversity.

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“…Nevertheless, since we only used two sampling loca- , 2000). This illustrates the complex relationships existing between pelagic larval duration and gene flow in marine species (Nanninga & Manica, 2018;Selkoe & Toonen, 2011) and raises the question of the long-distance benefits of marine reserves in terms of demographic connectivity (Manel et al, 2019).…”

Section: Discussionmentioning

confidence: 90%

The spatial scale of dispersal revealed by admixture tracts

Duranton

Bonhomme

Gagnaire

2019

Evolutionary Applications

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Evaluating species dispersal across the landscape is essential to design appropriate management and conservation actions. However, technical difficulties often preclude direct measures of individual movement, while indirect genetic approaches rely on assumptions that sometimes limit their application. Here, we show that the temporal decay of admixture tracts lengths can be used to assess genetic connectivity within a population introgressed by foreign haplotypes. We present a proof‐of‐concept approach based on local ancestry inference in a high gene flow marine fish species, the European sea bass (Dicentrarchus labrax). Genetic admixture in the contact zone between Atlantic and Mediterranean sea bass lineages allows the introgression of Atlantic haplotype tracts within the Mediterranean Sea. Once introgressed, blocks of foreign ancestry are progressively eroded by recombination as they diffuse from the western to the eastern Mediterranean basin, providing a means to estimate dispersal. By comparing the length distributions of Atlantic tracts between two Mediterranean populations located at different distances from the contact zone, we estimated the average per‐generation dispersal distance within the Mediterranean lineage to less than 50 km. Using simulations, we showed that this approach is robust to a range of demographic histories and sample sizes. Our results thus support that the length of admixture tracts can be used together with a recombination clock to estimate genetic connectivity in species for which the neutral migration‐drift balance is not informative or simply does not exist.

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Long-Distance Benefits of Marine Reserves: Myth or Reality?

Cited by 56 publications

References 105 publications

Assessing spillover from marine protected areas and its drivers: A meta‐analytical approach

Assessing spillover from marine protected areas and its drivers: A meta‐analytical approach

Global determinants of freshwater and marine fish genetic diversity

The spatial scale of dispersal revealed by admixture tracts

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