Impacts of rising sea temperature on krill increase risks for predators in the Scotia Sea

PLoS ONE, Journal Year: 2018, Volume and Issue: 13(1), P. e0191011 - e0191011

Published: Jan. 31, 2018

Climate change is a threat to marine ecosystems and the services they provide, reducing fishing pressure one option for mitigating overall consequences biota. We used minimally realistic ecosystem model examine how projected effects of ocean warming on growth Antarctic krill, Euphausia superba, might affect populations krill dependent predators (whales, penguins, seals, fish) in Scotia Sea. also investigated potential mitigate depletion risk by curtailing at different points 21st century. The biomass were strongest northern Sea, with ≥40% decline mass individual krill. Projections suggest 25% chance that will fall below an established threshold (75% its unimpacted level), consequent risks some predator populations, especially penguins. Average penguin abundance declined up 30% level, 50% falling threshold. Simulated currently permitted harvest rates further increased depletion, stopping offset associated our extent. These results varied location species group. Risk reductions smaller spatial scales differed from those regional which suggests may be more vulnerable than others future changes biomass. However, impacts did not always map directly Our findings indicate importance identifying targeting protection measures appropriate scales, spatially-structured management avoid aggravating rising temperatures. This help balance tradeoffs among uncertain future.

Language: Английский

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Thermal performance of the European flat oyster, Ostrea edulis (Linnaeus, 1758)—explaining ecological findings under climate change

Marine Biology, Journal Year: 2020, Volume and Issue: 167(2)

Published: Jan. 9, 2020

Language: Английский

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Seahorse Aquaculture, Biology and Conservation: Knowledge Gaps and Research Opportunities

Reviews in Fisheries Science & Aquaculture, Journal Year: 2016, Volume and Issue: 25(1), P. 100 - 111

Published: Oct. 13, 2016

Seahorses are currently experiencing an unprecedented level of anthropogenic pressure promoted by habitat destruction and increasing fishing effort to supply premium markets. This study provides overview the scientific literature on seahorses in 21st century critically discusses five major knowledge gaps research opportunities advance state art this field. The average number publications per year increased from 10 (2001–2002) ∼40 (2001–2015), majority addressing issues seahorse ecology, biology, aquaculture, with most studied species being Hippocampus kuda, H. guttulatus, reidi, abdominalis, erectus, hippocampus, trimaculatus. explores opportunity using as flagship foster mangrove conservation decrease trawling fisheries. It also suggests that further studies needed better understand manage populations heavily traded species, well need monitor their vulnerability emerging pollutants climate change. Sustainable aquaculture can play important role conservation, development reliable traceability tools fight illegal trade these highly priced organisms.

Language: Английский

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Predicting shifting sustainability trade‐offs in marine finfish aquaculture under climate change

Global Change Biology, Journal Year: 2018, Volume and Issue: 24(8), P. 3654 - 3665

Published: May 3, 2018

Defining sustainability goals is a crucial but difficult task because it often involves the quantification of multiple interrelated and sometimes conflicting components. This complexity may be exacerbated by climate change, which will increase environmental vulnerability in aquaculture potentially compromise ability to meet needs growing human population. Here, we developed an approach inform sustainable quantifying spatio-temporal shifts critical trade-offs between costs benefits using time reach commercial size as possible proxy economic implications under change. Our results indicate that optimizing practices minimizing impact (this study considers benthic carbon deposition ≥ 1 g C m-2 day-1 ) become increasingly Moreover, increasing temperature produce poleward shift trade-offs. These findings suggest future management strategies plans need account for effects change across scales. Overall, our highlight importance integrating factors order sustainably manage natural resources shifting climatic conditions.

Language: Английский

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Species range shifts along multistressor mosaics in estuarine environments under future climate

Fish and Fisheries, Journal Year: 2019, Volume and Issue: 21(1), P. 32 - 46

Published: Oct. 16, 2019

Abstract Range shifts are a key mechanism that species employ in response to climate change. Increasing global temperatures driving redistributions cooler areas along three main spatial axes: increasing latitudes, altitudes and water depths. Climate‐mediated range shift theory focuses on temperature as the primary ecological driver, but change alters other environmental factors well, these rarely work isolation. Ecosystems often characterized mosaics of overlapping stressors, resulting temporal heterogeneity which differs between stable, low complexity (e.g. open ocean) highly variable, complex mosaic environments estuaries). We propose multistressor climate‐mediated across abiotic gradients, typical for mobile fish) variable coastal environments. conceptualize how climate‐driven changes salinity, temperature, dissolved oxygen pH can drive redistribution estuarine future world. Non‐thermal drivers critical component when not considered, underestimate impact populations ecosystem services.

Language: Английский

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Assessing marine ecosystem condition: A review to support indicator choice and framework development

Ecological Indicators, Journal Year: 2020, Volume and Issue: 121, P. 107148 - 107148

Published: Nov. 20, 2020

This review provides a broad conceptual overview of different approaches to measuring marine ecosystem condition and guidance for framework development (particularly relevant developing countries). The objectives were definitions identify the core key challenges within research area. Furthermore, we reviewed advantages disadvantages indicators that can be used assessments. A semi-systematic approach drawing from more than 300 studies covering range methods was followed. Generally, are based on known changes ecosystem, but ultimately, they should align with definition an consider structure functioning. As far as possible, relate observed state reference or ecological target. Importantly, practical, scalable always provided when conducting Five indicator categories identified including pressures, physical parameters, biological structure, functional models. Indicators mostly focus drivers change (i.e. ex situ pressures) these data easier obtain. While valuable, classes only provide indirect appraisal functioning in instances where relationship between pressure, known. measure directly report condition; however, (and monitoring) requirements make them impractical most instances. Ideally, integrated assessments, all categories, prioritised comprehensive condition. However, this often requires transdisciplinary collaboration, substantial capacity associated funding) time collect necessary data. An alternative is select few strategic address at same feasible project specific objectives. Where data-derived followed measurements have potential improve understanding impacts anthropogenic pressures functioning, turn facilitate better management human activities enhance

Language: Английский

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Stressing over the Complexities of Multiple Stressors in Marine and Estuarine Systems

Ocean-Land-Atmosphere Research, Journal Year: 2022, Volume and Issue: 2022

Published: Jan. 1, 2022

Aquatic ecosystems are increasingly threatened by multiple human-induced stressors associated with climate and anthropogenic changes, including warming, nutrient pollution, harmful algal blooms, hypoxia, changes in CO 2 pH. These may affect systems additively synergistically but also counteract each other. The resultant ecosystem occur rapidly, affecting both biotic abiotic components their interactions. Moreover, the complexity of interactions increases as one ascends food web due to differing sensitivities exposures among life stages species interactions, such competition predation. There is a need further understand nontraditional mixotrophy, which ability combine photosynthesis feeding single organism. these webs presents challenges modeling management. Developing ecological models multistressor effects challenged lack sufficient data on interactive across different trophic levels substantial variability regional scales. To obtain broad suite nested set experiments can be employed. Modular, coupled, multitrophic level will provide flexibility explore additive, amplified, propagated, antagonistic, and/or reduced that emerge from stressors. Here, eutrophication change reviewed, then example around world used illustrate how model scenarios examine potential future changes.

Language: Английский

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Ocean acidification has lethal and sub-lethal effects on larval development of yellowfin tuna, Thunnus albacares

Journal of Experimental Marine Biology and Ecology, Journal Year: 2016, Volume and Issue: 482, P. 18 - 24

Published: May 7, 2016

Language: Английский

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Relative Impacts of Simultaneous Stressors on a Pelagic Marine Ecosystem

Frontiers in Marine Science, Journal Year: 2019, Volume and Issue: 6

Published: July 4, 2019

Climate change and fishing are two of the greatest anthropogenic stressors on marine ecosystems. We investigate effects these Hawaii's deep-set longline fishery for bigeye tuna (Thunnus obesus) ecosystem which supports it using a size-based food web model that incorporates individual species captures metabolic rising ocean temperatures. find when climate examined individually, is greater stressor. This suggests proactive fisheries management could be particularly effective tool mitigating either by balancing or outweighing effects. However, modeling jointly shows even large changes cannot completely offset Furthermore, considered together, their to some degree synergistic. Our results suggest decline in yield may inevitable. The effect depends primarily upon intensity mortality. Management measures take this into account can both minimize support at least level resilience.

Language: Английский

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Climate Change Impacts on a Tropical Fishery Ecosystem: Implications and Societal Responses

Sustainability, Journal Year: 2020, Volume and Issue: 12(19), P. 7970 - 7970

Published: Sept. 25, 2020

The present study aimed to map out the current threats and anticipated impacts of climate change on most important hilsa shad (Tenualosa ilisha) fishery associated fishing communities based fieldwork in six coastal communities. To collect empirical data, individual interviews, focus group discussions, oral history, key informant interviews were conducted. supplement findings, time-series data cyclones sea-borne depressions Bay Bengal also analyzed. Analysis secondary regarding change-induced events regional studies suggested that biophysical conditions are likely be aggravated future, potentially causing more frequent extreme affecting livelihoods Bangladesh. fisher respondents revealed main target is particularly vulnerable terms alterations migration patterns breeding growth performance. fishers reported constant climate-related risks because they live seafront locations, exposed events, their occupation entails risky sea fishing. Fishers claimed often need return coast due unsuitable weather related tropical depressions, which can cause financial losses or even causalities. Such negatively affect fishers’ livelihoods, wellbeing. cope with have adopted various strategies at both household levels. However, these only support immediate survival; not enough for long-term resilience. improve resilience fishers, argues implementation Small-Scale Fisheries Guidelines (SSF Guidelines), call longer-term development goals, including relief phase, rehabilitation, reconstruction, recovery reduce vulnerabilities anthropogenic risks.

Language: Английский

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