Larval behaviour, dispersal and population connectivity in the deep sea

Scientific Reports, Journal Year: 2020, Volume and Issue: 10(1)

Published: June 30, 2020

Ecosystem connectivity is an essential consideration for marine spatial planning of competing interests in the deep sea. Immobile, adult communities are connected through freely floating larvae, depending on new recruits their health and to adapt external pressures. We hypothesize that vertical swimming ability deep-sea before they permanently settle at bottom, one way larvae can control dispersal. test this hypothesis with more than [Formula: see text] simulated particles a range active behaviours embedded within currents high-resolution ocean model. Despite much stronger horizontal currents, have order magnitude impact These strong relationships between larval dispersal, pathways, demonstrate lack data behaviour traits serious impediment modelling ecosystem connectivity; uncertainty greatly limits our develop ecologically coherent protected area networks.

Language: Английский

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Reviewing the Ecosystem Services, Societal Goods, and Benefits of Marine Protected Areas

Frontiers in Marine Science, Journal Year: 2021, Volume and Issue: 8

Published: June 1, 2021

Marine protected areas (MPAs) are globally important environmental management tools that provide protection from the effects of human exploitation and activities, supporting conservation marine biological diversity, habitats, ecosystems processes they host, as well resources in a broad sense. Consequently, also expected to manage enhance ecosystem services material, non-material, consumptive non-consumptive goods, benefits for humans. There is however certain confusion on what constitutes an service, it not always easy distinguish between them societal benefits. The main nuance service aptitude has or develops naturally consequence action, manifests through its own properties (productivity, stability, quality key parameters, etc.), while benefit economic other profitability (emotional, educational, scientific, etc.) humans obtain said quality. In this work, 268 publications, together with our experiences different investigations carried out MPAs part BiodivERsA3-2015-21 RESERVEBENEFIT European project, have been selected, reviewed discussed analyze knowledge status derived them, sometimes providing information their evidence, when exist. We define classify protection, elaborate conceptual model cause-effect relationships them.

Language: Английский

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Reproductive hyperallometry and managing the world’s fisheries

Proceedings of the National Academy of Sciences, Journal Year: 2021, Volume and Issue: 118(34)

Published: Aug. 16, 2021

Significance We find that a ubiquitous assumption in fisheries models for predicting population replenishment introduces systematic overestimates of fished populations. For 32 the world’s major fisheries, these biases result harvest thresholds being set too high: most cases, reference points based on spawning potential ratios are more than 2.5 times higher those necessary to achieve desired level replenishment. When we use biologically appropriate reproductive hyperallometry, management tools such as spatiotemporal closures and slots can outperform traditional approaches terms yield. Failing consider hyperallometry efficacy underestimates benefits create reservoirs larger individuals.

Language: Английский

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Increased connectivity and depth improve the effectiveness of marine reserves

Global Change Biology, Journal Year: 2021, Volume and Issue: 27(15), P. 3432 - 3447

Published: May 20, 2021

Abstract Marine reserves are a key tool for the conservation of marine biodiversity, yet only ~2.5% world's oceans protected. The integration into connected networks representing all habitats has been encouraged by international agreements, benefits this design not tested empirically. Australia one largest systems reserves, providing rare opportunity to assess how connectivity influences success. An Australia‐wide dataset was collected using baited remote underwater video deployed across depth range from 0 100 m effectiveness protecting teleosts subject commercial and recreational fishing. A meta‐analytical comparison 73 fished species within 91 found that, on average, had 28% greater abundance 53% biomass compared adjacent areas open However, protection were observed (heterogeneity), so full subsets generalized additive modelling used consider factors that influence reserve effectiveness, including distance‐based ecological metrics among reserves. Our results suggest increased improve aforementioned these should be considered optimize such over time. We provide important guidance when implementing purpose increasing size species, given expected increase in coverage globally. show highly protected (no‐take) designed connectivity, can an effective strategy temperate tropical waters overarching biodiversity framework.

Language: Английский

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Temperature reduces fish dispersal as larvae grow faster to their settlement size

Journal of Animal Ecology, Journal Year: 2021, Volume and Issue: 90(6), P. 1419 - 1432

Published: Jan. 29, 2021

Abstract As species struggle to cope with rising ocean temperatures, temperate marine assemblages are facing major reorganization. Many benthic have a brief but critical period dispersing through the plankton, when they particularly susceptible variations in temperature. Impacts of temperatures can thus ripple population community‐wide consequences. However, responses highly species‐specific, making it difficult discern assemblage‐wide patterns life histories different fish species. Here, we evaluate temperature early several using otolith reconstructive techniques. We also assess consequences future warming scenarios this assemblage. sampled recent settlers nine common across gradient Mediterranean Sea and obtained environmental data for each individual. Using microstructure, measured traits including pelagic larval duration (PLD), growth rate, settlement size, hatching dates. used GLM framework examine how variables influenced life‐history parameters. show that increasing results considerable reduction dispersal potential fish. find nearly universal, decline (PLD) between 10% 25%. This was because, temperature, larvae grew quicker their size. Settlement size itself less affected by appears be an ontogenetically fixed process. Given current estimates warming, there could up 50 km Mediterranean, reducing connectivity potentially isolating populations as waters warm.

Language: Английский

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Estimating dispersal kernels using genetic parentage data

Methods in Ecology and Evolution, Journal Year: 2017, Volume and Issue: 9(3), P. 490 - 501

Published: Oct. 27, 2017

Abstract Dispersal kernels are the standard method in biology for describing and predicting relationship between dispersal distance. Statistically fitted allow observations of a limited number events to be extrapolated across wider landscape, form basis wide range theories methods ecology, evolution conservation. Genetic parentage data an increasingly common source information, particularly species where is difficult observe directly. In particular, analysis now routinely applied coral reef fish, whose larvae can potentially disperse over many kilometres, too small track situ. It not straightforward estimate from data, existing all have substantial limitations. These include omission important population processes such as density‐dependent mortality, on unassigned juveniles. Here we develop proof new likelihood estimator fitting applying it simulated datasets fish Great Barrier Reef ( GBR ). The incorporates series factors previously considered other methods: partial sampling adults juveniles sampled sites; existence dispersers unsampled habitat patches; post‐settlement (e.g. mortality) that follow but precede sampling. Including these additional requires adult populations patches, result superior mean distances. Our power analyses suggest currently available fishes large enough fit accurate kernels. Based one particular region , should distributed equally juveniles, sample more than 3% population. However, while resulting offer reasonable estimates dispersal, they fail capture variation realistic patterns.

Language: Английский

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Patterns and trends in marine population connectivity research

Marine Ecology Progress Series, Journal Year: 2017, Volume and Issue: 585, P. 243 - 256

Published: Nov. 21, 2017

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 585:243-256 (2017) - DOI: https://doi.org/10.3354/meps12418 REVIEW Patterns and trends in marine population connectivity research Dale N. Bryan-Brown1,*, Christopher J. Brown2, Jane M. Hughes3, Rod Connolly1 1Australian Rivers Institute Estuaries Coast, School of Environment, Griffith University, Gold Queensland 4222, Australia 2Australian Institute, Nathan, 4111, 3Australian *Corresponding author: [email protected] ABSTRACT: Research into (MPC)—the rate transfer organisms between locations—is important for understanding how systems operate as well ability conserve them effectively. The large body this field has never been quantitatively assessed identify manner which effort expended. We conducted an extensive quantitative literature review >1000 studies analysed ‘What?’ ‘How?’ MPC research. Publication rates increased dramatically mid-2000s, due a surge utilising genetic techniques assessing larval dispersal, but post-larval movement have not at same rate. is dominated by bony fish, ~3 times more prevalent than next most common taxonomic class (malacostracan crustaceans). dispersal some habitat-forming (e.g. seagrasses, kelps) studied extensively (particularly corals), whereas other groups received minimal attention mangroves saltmarshes). Spatially, concentrated around Europe, North America Australia, contrast regions such eastern southern Asia western Africa. These taxonomic, habitat geographic biases are likely impact predict manage these variance life-history traits abiotic conditions well-studied under systems. recommend that researchers refocus efforts towards under-studied regions, taxa habitats obtain representative scales connectivity’s role maintaining populations. KEY WORDS: Larval · Post-larval Dispersal Movement Literature Review Full text pdf format Supplementary material PreviousCite article as: Bryan-Brown DN, Brown CJ, Hughes JM, Connolly RM Mar Ecol Prog Ser 585:243-256. Export citation Tweet linkedIn Cited Published Vol. 585. Online publication date: December 22, 2017 Print ISSN: 0171-8630; 1616-1599 Copyright © Inter-Research.

Language: Английский

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A multiple-species framework for integrating movement processes across life stages into the design of marine protected areas

Biological Conservation, Journal Year: 2017, Volume and Issue: 216, P. 93 - 100

Published: Oct. 18, 2017

Language: Английский

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A bioinformatic pipeline for identifying informative SNP panels for parentage assignment from RADseq data

Molecular Ecology Resources, Journal Year: 2018, Volume and Issue: 18(6), P. 1263 - 1281

Published: June 5, 2018

Abstract The development of high‐throughput sequencing technologies is dramatically increasing the use single nucleotide polymorphisms ( SNP s) across field genetics, but most parentage studies wild populations still rely on microsatellites. We developed a bioinformatic pipeline for identifying panels that are informative analysis from restriction site‐associated DNA RAD seq) data. This includes options with or without reference genome, and provides methods to maximize genotyping accuracy select sets unlinked loci have high statistical power. test this small Mexican gray wolf bighorn sheep, which analyses expected be challenging due low genetic diversity presence many closely related individuals. compare results generated between s For wolf, we conducted 30 pups cohort where samples were available 64% possible mothers 53% fathers, assignments could estimated because true identities parents known priori based maternity 39 lambs five cohorts 77% sampled, unknown. Analyses genome produced ≥95% assignment outperforming microsatellites at 78% accuracy. Maternity completely consistent all 74.4% Accuracy consistency not reduced when using as few 284 142 indicating our can used develop assays relatively numbers loci.

Language: Английский

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Looking for hotspots of marine metacommunity connectivity: a methodological framework

Scientific Reports, Journal Year: 2016, Volume and Issue: 6(1)

Published: March 31, 2016

Seascape connectivity critically affects the spatiotemporal dynamics of marine metacommunities. Understanding how patterns emerge from physically and biologically-mediated interactions is therefore crucial to conserve ecosystem functions biodiversity. Here, we develop a set biophysical models explore in assemblages species belonging typical Mediterranean community (Posidonia oceanica meadows) characterized by different dispersing traits. We propose novel methodological framework synthesize species-specific results into metrics show that variation magnitude direction connections, as well interspecific differences traits, are key factors structuring connectivity. eventually demonstrate these can be used characterize functional role each area determining at basin level support conservation planning.

Language: Английский

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