Global sensitivity and uncertainty analyses of an ecosystem model for simulating food web dynamics in the Cooperation Sea, Southern Ocean

Fisheries Research, Journal Year: 2025, Volume and Issue: 285, P. 107345 - 107345

Published: April 7, 2025

Language: Английский

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Managing for climate resilient fisheries: Applications to the Southern Ocean

Ocean & Coastal Management, Journal Year: 2023, Volume and Issue: 239, P. 106580 - 106580

Published: March 27, 2023

Climate change is having profound effects on populations of fished species and the ecosystems which they depend, lending to a growing body work that advocates for climate resilience be priority in fishery management.Here, we provide comprehensive analysis tools needed manage resiliency.The Antarctic region among most vulnerable change, thus, then consider resilient management utilized by Commission Conservation Marine Living Resources (CCAMLR), responsible marine living resources as part Treaty System.We note progress, gaps, opportunities implementation.Across literature, ecosystembased was cited an appropriate tool ecosystems, use model outputs (projections simulations), protected areas (MPAs), dynamic stock assessments.CCAMLR has unique position where its Convention effectively mandates principles ecosystem-based precautionary approach managing fisheries, many Member States have been advocating initiatives within this approach.While CCAMLR made limited overall progress towards ensuring resilience, it advanced some areas, such MPA implementation, developing risk assessment krill, including statements reports, although there much done.While remains worldwide issue must addressed global scale, holds responsibility adaptively Southern Ocean resilience.

Language: Английский

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Untangling unexpected terrestrial conservation challenges arising from the historical human exploitation of marine mammals in the Atlantic sector of the Southern Ocean

AMBIO, Journal Year: 2022, Volume and Issue: 52(2), P. 357 - 375

Published: Sept. 1, 2022

Abstract Intensive human exploitation of the Antarctic fur seal ( Arctocephalus gazella ) in its primary population centre on sub-Antarctic South Georgia, as well other islands and parts Shetland Islands, eighteenth nineteenth centuries rapidly brought populations to brink extinction. The species has now recovered throughout original distribution. Non-breeding yearling seals, almost entirely males, from Georgia disperse summer months far more widely higher numbers than there is evidence for taking place pre-exploitation era. Large haul out coastal terrestrial habitats Orkney Islands also along north-east west coast Peninsula at least Marguerite Bay. In these previously less- or non-visited areas, seals cause levels damage likely never have been experienced fragile through trampling over-fertilisation, eutrophication sensitive freshwater ecosystems. This increased area impact further synergies with aspects regional climate change, including reduction extent duration sea ice permitting access farther south, changes krill abundance conservation value biodiversity threatened by distribution expansion, multiple anthropogenic factors acting synergy both historically present day, a new yet unaddressed challenge agencies charged ensuring protection Antarctica’s unique

Language: Английский

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Quantifying circumpolar summer habitat for Antarctic krill and Ice krill, two key species of the Antarctic marine ecosystem

ICES Journal of Marine Science, Journal Year: 2023, Volume and Issue: 80(6), P. 1773 - 1786

Published: July 14, 2023

Abstract Antarctic krill (Euphausia superba) and Ice crystallorophias) are key species within Southern Ocean marine ecosystems. Given their importance in regional food webs, coupled with the uncertain impacts of climate change, on-going recovery krill-eating mammals, expanding commercial fishery for krill, there is an increasing need to improve current estimates circumpolar habitat distribution. Here, we provide estimate austral summer distribution both using ensemble models updated environmental covariates. Our were able resolve segregated habitats species. We find that extensive potential mainly situated open ocean concentrated Atlantic sector Ocean, while was more evenly around continent, largely over continental shelf. predicted by surface oxygen concentration water column temperature, additionally characterized mixed layer depth, distance shelf edge, salinity. results further understanding about these species, helping inform sustainable management practices.

Language: Английский

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Mercury concentrations in Antarctic zooplankton with a focus on the krill species, Euphausia superba

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 905, P. 167239 - 167239

Published: Sept. 22, 2023

Language: Английский

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Glowing wonders: exploring the diversity and ecological significance of bioluminescent organisms in Brazil

Photochemical & Photobiological Sciences, Journal Year: 2024, Volume and Issue: 23(7), P. 1373 - 1392

Published: May 11, 2024

Language: Английский

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A dynamic framework for assessing and managing risks to ecosystems from fisheries: demonstration for conserving the krill-based food web in Antarctica

Frontiers in Ecology and Evolution, Journal Year: 2023, Volume and Issue: 11

Published: June 2, 2023

The ecosystem approach to fisheries has been discussed since the 1980s. It aims reduce risks from whole, or components of, ecosystems, not just target species. Precautionary approaches further aim keep risk of damage a low level. Here, we provide dynamic framework for spreading ecosystems in space and time, method that can be used outset developing continually updated as new knowledge becomes available. Importantly, this integrates qualitative quantitative assess provides mechanisms both spread risk, including enabling closed areas help offset adjust catch limits regional baseline Also, does require uniform data standards across region but incorporate spatially temporally heterogeneous knowledge. coupled with conservation biodiversity marine protected areas, addressing potential overlap high value. accounts spatial temporal heterogeneity different scales at which organisms function. We develop first section paper, simple illustration its application. In include methods using conserving also present could account uncertainties input second section, real-world application managing food web effects fishing Antarctic krill Southern Ocean. Last, comment on wider development information improves.

Language: Английский

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Potential for redistribution of post‐moult habitat for Eudyptes penguins in the Southern Ocean under future climate conditions

Global Change Biology, Journal Year: 2022, Volume and Issue: 29(3), P. 648 - 667

Published: Oct. 24, 2022

Anthropogenic climate change is resulting in spatial redistributions of many species. We assessed the potential effects on an abundant and widely distributed group diving birds, Eudyptes penguins, which are main avian consumers Southern Ocean terms biomass consumption. Despite their abundance, several these species have undergone population declines over past century, potentially due to changing oceanography prey availability important winter months. used light-based geolocation tracking data for 485 individuals deployed between 2006 2020 across 10 major breeding locations five taxa penguins. boosted regression tree modelling quantify post-moult habitat preference southern rockhopper (E. chrysocome), eastern filholi), northern moseleyi) macaroni/royal chrysolophus E. schlegeli) then modelled redistribution under two scenarios, representative concentration pathways RCP4.5 RCP8.5 (for end 2071-2100). As forcings differ regionally, we quantified Atlantic, Central Indian, East West Pacific regions. found sea surface temperature height be most predictors current penguins; physical features that rapidly Ocean. Our results indicated less severe would lead loss than more RCP8.5. The penguin may experience a general poleward preferred habitat, but with contrasting (i) total area (ii) according geographic region (iii) (macaroni/royal vs. populations). provide further understanding regional impacts vulnerability change.

Language: Английский

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Imperatives for integrated science and policy in managing greenhouse gas risks to the Southern Polar Region

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(15), P. 4489 - 4492

Published: May 16, 2022

The Southern Polar Region (Antarctica and the Ocean) is threatened by climate change, ocean warming acidification. Reducing risks through direct human interventions in region or biological adaptation not possible. Resilience of to global needs establishment refugia science-based, climate-informed, ecosystem-based management, but long-term conservation will only be assured reduction greenhouse gas emissions.

Language: Английский

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Ecological networks of an Antarctic ecosystem: a full description of non-trophic interactions

Marine Biology, Journal Year: 2022, Volume and Issue: 170(1)

Published: Dec. 22, 2022

Language: Английский

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