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Perry D, Tamarit E, Sundell E, Axelsson M, Bergman S, Gräns A, Gullström M, Sturve J, Wennhage H. Physiological responses of Atlantic cod to climate change indicate that coastal ecotypes may be better adapted to tolerate ocean stressors. Sci Rep 2024; 14:12896. [PMID: 38839894 PMCID: PMC11153577 DOI: 10.1038/s41598-024-62700-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 05/20/2024] [Indexed: 06/07/2024] Open
Abstract
Healthy ecosystems and species have some degree of resilience to changing conditions, however as the frequency and severity of environmental changes increase, resilience may be diminished or lost. In Sweden, one example of a species with reduced resilience is the Atlantic cod (Gadus morhua). This species has been subjected to overfishing, and with additional pressures such as habitat degradation and changing environmental conditions there has been little to no recovery, despite more than a decade of management actions. Given the historical ecological, economical, and cultural significance of cod, it is important to understand how Atlantic cod respond to global climate change to recover and sustainably manage this species in the future. A multi-stressor experiment was conducted to evaluate physiological responses of juvenile cod exposed to warming, ocean acidification, and freshening, changes expected to occur in their nursery habitat. The response to single drivers showed variable effects related to fish biometrics and increased levels of oxidative stress dependent parameters. Importantly, two separate responses were seen within a single treatment for the multi-stressor and freshening groups. These within-treatment differences were correlated to genotype, with the offshore ecotype having a heightened stress response compared to the coastal ecotype, which may be better adapted to tolerate future changes. These results demonstrate that, while Atlantic cod have some tolerance for future changes, ecotypes respond differently, and cumulative effects of multiple stressors may lead to deleterious effects for this important species.
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Affiliation(s)
- Diana Perry
- Department of Aquatic Resources, Institute of Marine Research, Swedish University of Agricultural Sciences, Lysekil, Sweden.
| | - Elena Tamarit
- Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden
| | - Erika Sundell
- Department of Animal Environment and Health, Swedish University of Agricultural Sciences, Gothenburg, Sweden
| | - Michael Axelsson
- Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden
| | - Sanne Bergman
- The Arctic University Museum of Norway, UiT - the Arctic University of Norway, Tromsø, Norway
| | - Albin Gräns
- Department of Animal Environment and Health, Swedish University of Agricultural Sciences, Gothenburg, Sweden
| | - Martin Gullström
- School of Natural Sciences, Technology and Environmental Studies, Södertörn University, Huddinge, Sweden
| | - Joachim Sturve
- Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden
| | - Håkan Wennhage
- Department of Aquatic Resources, Institute of Marine Research, Swedish University of Agricultural Sciences, Lysekil, Sweden
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Zhu Y, Cui X, Kang B, Liu C, Reygondeau G, Wang Y, Cheung WWL, Chu J. Comparative analysis of climate-induced changes in distribution of representative fish species in the Yellow Sea. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:168699. [PMID: 38008324 DOI: 10.1016/j.scitotenv.2023.168699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 11/12/2023] [Accepted: 11/17/2023] [Indexed: 11/28/2023]
Abstract
Climate changes are posing remarkable impacts on marine fish and fisheries. Although many studies have addressed the distributional effects of climate change on single fish species or taxa in recent years, comparative studies focusing on different types of fish are still lacking. In this study, we applied dynamic bioclimate envelop models (DBEM), based on three earth system models, to predict sea surface and bottom temperature, as well as the spatial and temporal distribution of nine representative fishes in the Yellow Sea, contain two habitats, i.e., continental shelf benthopelagic (CBD) and continental shelf pelagic-neritic (CPN) fishes, and two thermophilies, i.e., warm temperate (WT) and warm water (WW) fishes. Under a low emissions scenario (RCP 2.6) and a high emissions scenario (RCP 8.5) between 1970 and 2060, results reveal that: a) CPN fishes show a distinct tendency to move to higher latitudes than CBD fishes, and WW fishes show a significant tendency to migrate more widely to the north than WT fishes; b) The relative abundance of CPN fishes is expected to be higher than that of CBD fishes, while there is no apparent difference in relative abundance between WW fishes and WT fishes. The main reasons for this difference are presumed to be: variance of temperature rise between the sea surface and bottom layers, divergent adaptations of the species, and disparate degrees of anthropogenic influence.
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Affiliation(s)
- Yugui Zhu
- Key Laboratory of Mariculture (Ministry of Education), College of Fisheries, Ocean University of China, Qingdao 266003, China; Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou 511458, China
| | - Xiaoyue Cui
- Key Laboratory of Mariculture (Ministry of Education), College of Fisheries, Ocean University of China, Qingdao 266003, China
| | - Bin Kang
- Key Laboratory of Mariculture (Ministry of Education), College of Fisheries, Ocean University of China, Qingdao 266003, China
| | - Chunlong Liu
- Key Laboratory of Mariculture (Ministry of Education), College of Fisheries, Ocean University of China, Qingdao 266003, China
| | - Gabriel Reygondeau
- Changing Ocean Research Unit, Institute for the Oceans and Fisheries, University of British Columbia, Vancouver V5K0A1, BC, Canada; Department of Ecology and Evolutionary Biology Max Planck, Yale Center for Biodiversity Movement and Global Change, Yale University, New Haven 06501, CT, USA
| | - Yunfeng Wang
- Institute of Oceanology, Chinese Academy of Sciences, Shandong, Qingdao 266071, China
| | - William W L Cheung
- Changing Ocean Research Unit, Institute for the Oceans and Fisheries, University of British Columbia, Vancouver V5K0A1, BC, Canada
| | - Jiansong Chu
- College of Marine Life Science, Ocean University of China, Qingdao 266003, China; Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou 511458, China.
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Andersen JH, Al-Hamdani Z, Carstensen J, Edelvang K, Egekvist J, Kaae BC, Hammer KJ, Therese Harvey E, Leth JO, McClintock W, Murray C, Olafsson AS, Olsen J, Sveegaard S, Tougaard J. Are European Blue Economy ambitions in conflict with European environmental visions? AMBIO 2023; 52:1981-1991. [PMID: 37639203 PMCID: PMC10654270 DOI: 10.1007/s13280-023-01896-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 05/15/2023] [Accepted: 06/07/2023] [Indexed: 08/29/2023]
Abstract
We report the outcomes of a comprehensive study of the potential consequences of the implementation of the EU Maritime Spatial Planning Directive (MSPD) in Danish waters. The analyses are anchored in a framework developed in support of data-driven Ecosystem-Based Maritime Spatial Planning. The data for the models include not only human stressors but also information on the distribution of ecosystem components ranging from planktonic communities over benthic communities to fish, seabirds and marine mammals. We have established a baseline, based on state-of-the-art data sets, with respect to combined effects upon ecosystem components. Future scenarios for the developments in human stressors were estimated for 2030 and 2050 based on information on existing policies, strategies and plans and were compared to the baseline. In addition, we developed a scenario for implementation of the Marine Strategy Framework Directive (MSFD), i.e. working towards meeting the objectives of Good Environmental Status. Our results indicate that (1) combined human stressors will possibly increase in 2030 and 2050 compared to the baseline, (2) increased combined human stressors are likely to lead to a worsening of the environmental and ecological status sensu the Marine Strategy Framework Directive and the Water Framework Directive (WFD), and (3) the MSPD implementation process appears to conflict with the MSFD and WFD objectives. Accordingly, we are sceptical of claims of an untapped potential for Blue Growth in Danish marine waters.
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Affiliation(s)
- Jesper H Andersen
- NIVA Denmark Water Research, Njalsgade 76, 2300, Copenhagen S, Denmark.
| | | | - Jacob Carstensen
- Department of Ecoscience, Aarhus University, Frederiksborgvej 399, 4000, Roskilde, Denmark
| | - Karen Edelvang
- DTU Aqua, Kemitorvet, Building 202, 2800, Kgs. Lyngby, Denmark
| | | | - Berit C Kaae
- Department of Geosciences and Natural Resource Management, University of Copenhagen, Rolighedsvej 23, 1958, Frederiksberg C, Denmark
| | | | | | | | - Will McClintock
- NCEAS, 1021 Anacapa Street, Santa Barbara, CA, 93101-5509, USA
| | - Ciarán Murray
- NIVA Denmark Water Research, Njalsgade 76, 2300, Copenhagen S, Denmark
| | - Anton S Olafsson
- Department of Geosciences and Natural Resource Management, University of Copenhagen, Rolighedsvej 23, 1958, Frederiksberg C, Denmark
| | - Jeppe Olsen
- DTU Aqua, Kemitorvet, Building 202, 2800, Kgs. Lyngby, Denmark
| | - Signe Sveegaard
- Department of Ecoscience, Aarhus University, Frederiksborgvej 399, 4000, Roskilde, Denmark
| | - Jakob Tougaard
- Department of Ecoscience, Aarhus University, Frederiksborgvej 399, 4000, Roskilde, Denmark
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Stephenson F, Rowden AA, Anderson OF, Ellis JI, Geange SW, Brough T, Behrens E, Hewitt JE, Clark MR, Tracey DM, Goode SL, Petersen GL, Lundquist CJ. Implications for the conservation of deep-water corals in the face of multiple stressors: A case study from the New Zealand region. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 346:118938. [PMID: 37738731 DOI: 10.1016/j.jenvman.2023.118938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 08/31/2023] [Accepted: 09/03/2023] [Indexed: 09/24/2023]
Abstract
The waters around New Zealand are a global hotspot of biodiversity for deep-water corals; approximately one sixth of the known deep-water coral species of the world have been recorded in the region. Deep-water corals are vulnerable to climate-related stressors and from the damaging effects of commercial fisheries. Current protection measures do not account for the vulnerability of deep-water corals to future climatic conditions, which are predicted to alter the distribution of suitable habitat for them. Using recently developed habitat suitability models for 12 taxa of deep-water corals fitted to current and future seafloor environmental conditions (under different future climatic conditions: SSP2 - 4.5 and SSP3 - 7.0) we explore possible levels of spatial protection using the decision-support tool Zonation. Specifically, we assess the impact of bottom trawling on predictions of current distributions of deep-water corals, and then assess the effectiveness of possible protection for deep-water corals, while accounting for habitat refugia under future climatic conditions. The cumulative impact of bottom trawling was predicted to impact all taxa, but particularly the reef-forming corals. Core areas of suitable habitat were predicted to decrease under future climatic conditions for many taxa. We found that designing protection using current day predictions alone, having accounted for the impacts of historic fishing impacts, was unlikely to provide adequate conservation for deep water-corals under future climate change. Accounting for future distributions in spatial planning identified areas which may provide climate refugia whilst still providing efficient protection for current distributions. These gains in conservation value may be particularly important given the predicted reduction in suitable habitat for deep-water corals due to bottom fishing and climate change. Finally, the possible impact that protection measures may have on deep-water fisheries was assessed using a measure of current fishing value (kg km-2 fish) and future fishing value (predicted under future climate change scenarios).
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Affiliation(s)
| | - Ashley A Rowden
- National Institute of Water & Atmospheric Research, Wellington, New Zealand; Victoria University Wellington, School of Biological Sciences, Wellington, New Zealand
| | - Owen F Anderson
- National Institute of Water & Atmospheric Research, Wellington, New Zealand
| | - Joanne I Ellis
- School of Science, University of Waikato, Tauranga, New Zealand
| | - Shane W Geange
- New Zealand Department of Conservation, PO Box 10-420, Wellington, New Zealand
| | - Tom Brough
- National Institute of Water & Atmospheric Research, Hamilton, New Zealand
| | - Erik Behrens
- National Institute of Water & Atmospheric Research, Wellington, New Zealand
| | - Judi E Hewitt
- Department of Statistics, University of Auckland, Auckland, New Zealand
| | - Malcolm R Clark
- National Institute of Water & Atmospheric Research, Wellington, New Zealand
| | - Dianne M Tracey
- National Institute of Water & Atmospheric Research, Wellington, New Zealand
| | - Savannah L Goode
- National Institute of Water & Atmospheric Research, Wellington, New Zealand; Victoria University Wellington, School of Biological Sciences, Wellington, New Zealand
| | - Grady L Petersen
- National Institute of Water & Atmospheric Research, Hamilton, New Zealand
| | - Carolyn J Lundquist
- National Institute of Water & Atmospheric Research, Hamilton, New Zealand; School of Environment, University of Auckland, Auckland, New Zealand
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Hewage TMG, Woo DW, Celino-Brady FT, Seale AP. Temperature modulates the osmosensitivity of tilapia prolactin cells. RESEARCH SQUARE 2023:rs.3.rs-2524830. [PMID: 36909603 PMCID: PMC10002831 DOI: 10.21203/rs.3.rs-2524830/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
In euryhaline fish, prolactin (Prl) plays an essential role in freshwater (FW) acclimation. In the euryhaline and eurythermal Mozambique tilapia, Oreochromis mossambicus, Prl cells are model osmoreceptors, recently described to be thermosensitive. To investigate the effects of temperature on osmoreception, we incubated Prl cells of tilapia acclimated to either FW or seawater (SW) in different temperature (20, 26 and 32°C) and osmolality (280, 330 and 420 mOsm/kg) combinations for 6 h. Release of both Prl isoforms, Prl188 and Prl177, increased in hyposmotic media and were further augmented with a rise in temperature. Hyposmotically-induced release of Prl188 was inhibited at 20°C. In SW fish, mRNA expression of prl188 and prl177 showed direct and inverse relationships with temperature, respectively. In SW-acclimated tilapia Prl cells incubated in hyperosmotic media, Prl receptors, prlr1 and prlr2, and the stretch-activated Ca2+ channel, trpv4, were inhibited at 32°C, suggesting the presence of a cellular mechanism to compensate for elevated Prl release. Transcription factors, pou1f1, pou2f1b, creb3l1, cebpb, stat3, stat1a and nfat1c, known to regulate prl188 and prl177, were also downregulated at 32°C. Our findings provide evidence that osmoreception is modulated by temperature, and that both thermal and osmotic responses vary with acclimation salinity.
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