Aquatic connectivity: challenges and solutions in a changing climate

Journal of Fish Biology, Journal Year: 2024, Volume and Issue: 105(2), P. 392 - 411

Published: April 7, 2024

The challenge of managing aquatic connectivity in a changing climate is exacerbated the presence additional anthropogenic stressors, social factors, and economic drivers. Here we discuss these issues context structural functional for biodiversity, specifically fish, both freshwater marine realms. We posit that adaptive management strategies consider shifting baselines socio-ecological implications change will be required to achieve objectives. role renewable energy expansion, particularly hydropower, critically examined its impact on connectivity. advocate strategic spatial planning incorporates nature-positive solutions, ensuring mitigation efforts are harmonized with biodiversity conservation. underscore urgency integrating robust scientific modelling stakeholder values define clear, Finally, call innovative monitoring predictive decision-making tools navigate uncertainties inherent climate, goal resilience sustainability ecosystems.

Language: Английский

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Cross-realm biodiversity profile of the South African coastal zone

African Journal of Marine Science, Journal Year: 2025, Volume and Issue: 47(1), P. 1 - 18

Published: Jan. 2, 2025

Language: Английский

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Integrative systematics of the taxonomically complex gobiid genus Glossogobius Gill, 1859 (Teleostei: Gobiidae) from the south-western Indian Ocean, with a description of a new species

Zoological Journal of the Linnean Society, Journal Year: 2025, Volume and Issue: 203(4)

Published: April 1, 2025

Abstract Glossogobius, a species-rich gobiid genus with 42 recognized species distributed in the Indo-West Pacific, lacks comprehensive phylogenetic analysis. The highest diversity of occurs tropical West highlighting this region as centre endemism. In contrast, Indian Ocean has lower (nine species). This study offers first thorough description Glossogobius south-western through integrative analyses. Our findings reveal nine lineages, five which are newly identified, including new species, hanisii sp. nov., described from southern Africa and Madagascar. Seven species/lineages, along G. kokius Mauritius tenuiformis, endemic to Ocean. With 65% species/lineages being region, it is identified hotspot genetic structuring these lineages east coast appears be shaped by an interplay between life history, oceanographic conditions, adaptations marine biogeographic regions. Additionally, our highlight Madagascar’s central role diversification evolution unique gobies, provide framework for revision facilitate identification conservation units formulation management measures.

Language: Английский

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Advancing research in marine functional connectivity for improved policy and management

Marine Ecology Progress Series, Journal Year: 2024, Volume and Issue: 731, P. 1 - 8

Published: Feb. 8, 2024

Marine functional connectivity (MFC) refers to the dynamic spatial exchange of biomass, individuals, genes, and energy via collective movements all marine organisms during their lifetimes. In addition controlling distribution resilience biodiversity exploited stocks, MFC plays a key role in structure functioning ecosystems, at sea land-sea interface. As ecosystems species face climate change unprecedented multiple anthropogenic pressures, rapid action is needed comprehend patterns changes order anticipate fates ocean services humanity. Despite many advances techniques measure or infer species’ distributions dynamics, significant progress still necessary. A full understanding requires better knowledge relationships between communities habitats, quantification fluxes matter energy, capacity forecast how provided by may change. The 17 papers this Theme Section showcase range approaches scales applied contemporary studies encompass diversity taxa investigated worldwide. innovative presented here advance science pave way enrich current MFC’s ecosystem functioning, flag can be protect resources manage littoral habitats.

Language: Английский

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Influence of Mozambique Channel eddies on larval loss of two shallow-water commercial shrimp species

PLOS Climate, Journal Year: 2024, Volume and Issue: 3(6), P. e0000414 - e0000414

Published: June 3, 2024

The shallow-water shrimp fishery is an important social and economic sector in Mozambique. However, catches of shrimps have been declining over the last decades, presumably due to poor recruitment. Climate change has proposed as a potential cause increased mesoscale eddy activity Mozambique Channel, which may played role Indeed, stronger eddies could transport matter, including numbers larvae, from coast unfavourable offshore areas. In this study we used biophysical model investigate influence on dispersal larvae two commercial species ( Penaeus indicus Metapenaeus monoceros ) their spawning areas Sofala Bank. We found some 5 large events or southward loss (>10% loss) Bank caused by eddies, occurring sporadically. northern central were most affected lost offshore. Simulations revealed that temperature-induced larval mortality, associated with cold-core cyclonic also play up 40%, greater than circulation. when they survived, transported travel long distances (600–1600 km 15 days), potentially promoting connectivity other stocks region.

Language: Английский

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The role of acoustic telemetry in assessing fish connectivity within marine seascapes: A global review

Journal of Fish Biology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 5, 2024

The study of aquatic animal movements is a rapidly growing field research, with tracking methodology ever developing and refining. Acoustic telemetry arguably the most popular method used to fish. Despite this being able elucidate many aspects movement behavior, including residency, home range, migration, among others, one aspect that remains challenging definition connectivity, particularly within marine seascapes. As such, review assesses published literature on acoustic studies, which have specifically assessed some fish discusses these in terms distribution overall trends, diversity taxa life stage assessed, role large-scale networks plays assessing connectivity fishes, how studies been an applied context, proposes definitions linked specific types will assist future researchers when conceptualizing studies. Further, methods can be conjunction complement data are discussed. Given resources habitats intricately connected, highlights critical play link. It envisaged our developed framework stakeholders ecosystem functioning ultimately contribute improved conservation management populations ecosystems.

Language: Английский

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Using Biophysical modelling and marine connectivity to assess the risk of natural dispersal of non-indigenous species to comply with the Ballast Water Management Convention

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 16, 2024

Marine Non-Indigenous Species (NIS) are considered a major threat to biodiversity as well ecosystem functioning and services worldwide, ballast water has been one of the main pathways for transferring NIS between regions. The Ballast Water Management Convention (BWMC) aims at reducing risk both primary secondary introduction via take-up discharge by de facto requirements on-board treatment. However, BWMC allows national authorities grant exemptions from this requirement shipping routes operating within geographical area, known Same-Risk-Area (SRA). An SRA can be established in areas where assessment (RA) concludes low spreading relative their predicted natural dispersal. According should based on modelling dispersal NIS, but date no standard procedures have proposed. In paper we present methodology how apply biophysical analyses marine connectivity basis RA delineation. This work is intended provide standardised procedure benchmark future studies.

Language: Английский

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Using biophysical modelling and marine connectivity to assess the risk of natural dispersal of non-indigenous species to comply with the Ballast Water Management Convention

Biological Invasions, Journal Year: 2024, Volume and Issue: 26(8), P. 2539 - 2560

Published: May 9, 2024

Abstract The introduction of Marine Non-Indigenous Species (NIS) poses a significant threat to global marine biodiversity and ecosystems. To mitigate this risk, the Ballast Water Management Convention (BWMC) was adopted by UN International Maritime Organisation (IMO), setting strict criteria for discharges ballast water. However, BWMC permits exemptions shipping routes operating within geographical area, known as Same-Risk-Area (SRA). An SRA can be established in areas where risk assessment (RA) conclude that spread NIS via water is low relative predicted natural dispersal. Despite BWMC's requirement RAs based on modelling dispersal NIS, no standard procedures have been established. This paper presents methodology utilizing biophysical connectivity analyses conduct RA delineation. Focusing Kattegat Øresund connecting North Sea Baltic Sea, we examine two candidates spanning Danish Swedish waters. We provide an example how including summary, addressing findings, challenges, prospects. Our study aims advance development adoption consistent, transparent, scientifically robust assessments effective management.

Language: Английский

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Unexpected mismatches in population structure among marine mussel life‐history stages reveal the true scales of planktonic larval dispersal

Limnology and Oceanography Letters, Journal Year: 2024, Volume and Issue: 9(6), P. 806 - 814

Published: Sept. 23, 2024

Abstract Studies investigating gene flow in sessile or sedentary marine species typically draw conclusions about larval dispersal by genetic structure of adults. Here, we generated microsatellite data from adults, recruits, settlers and planktonic larvae the brown mussel, Perna perna , southeast coast South Africa, identified a consistent mismatch between adults all earlier life stages. While could be assigned to two major geographical groups (western eastern), most early‐stage mussels were strongly affiliated with eastern group. This suggests that few individuals present western portion sampling range will eventually establish themselves adult population, highlighting importance post‐recruitment processes as drivers population structure. Our findings caution against exclusive use assess connectivity facilitated propagules.

Language: Английский

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Protected Areas—A Challenge for Quirimbas Archipelago (Mozambique)

Natural Resources, Journal Year: 2024, Volume and Issue: 15(12), P. 283 - 305

Published: Jan. 1, 2024

Language: Английский

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