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Leung JYS, Zhang S, Connell SD. Is Ocean Acidification Really a Threat to Marine Calcifiers? A Systematic Review and Meta-Analysis of 980+ Studies Spanning Two Decades. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2107407. [PMID: 35934837 DOI: 10.1002/smll.202107407] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 06/24/2022] [Indexed: 06/15/2023]
Abstract
Ocean acidification is considered detrimental to marine calcifiers, but mounting contradictory evidence suggests a need to revisit this concept. This systematic review and meta-analysis aim to critically re-evaluate the prevailing paradigm of negative effects of ocean acidification on calcifiers. Based on 5153 observations from 985 studies, many calcifiers (e.g., echinoderms, crustaceans, and cephalopods) are found to be tolerant to near-future ocean acidification (pH ≈ 7.8 by the year 2100), but coccolithophores, calcifying algae, and corals appear to be sensitive. Calcifiers are generally more sensitive at the larval stage than adult stage. Over 70% of the observations in growth and calcification are non-negative, implying the acclimation capacity of many calcifiers to ocean acidification. This capacity can be mediated by phenotypic plasticity (e.g., physiological, mineralogical, structural, and molecular adjustments), transgenerational plasticity, increased food availability, or species interactions. The results suggest that the impacts of ocean acidification on calcifiers are less deleterious than initially thought as their adaptability has been underestimated. Therefore, in the forthcoming era of ocean acidification research, it is advocated that studying how marine organisms persist is as important as studying how they perish, and that future hypotheses and experimental designs are not constrained within the paradigm of negative effects.
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Affiliation(s)
- Jonathan Y S Leung
- Faculty of Materials and Energy, Southwest University, Chongqing, 400715, P. R. China
- Southern Seas Ecology Laboratories, School of Biological Sciences, The University of Adelaide, Adelaide, South Australia, 5005, Australia
| | - Sam Zhang
- Faculty of Materials and Energy, Southwest University, Chongqing, 400715, P. R. China
| | - Sean D Connell
- Southern Seas Ecology Laboratories, School of Biological Sciences, The University of Adelaide, Adelaide, South Australia, 5005, Australia
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Hu N, Brönmark C, Bourdeau PE, Hollander J. Marine gastropods at higher trophic level show stronger tolerance to ocean acidification. OIKOS 2022. [DOI: 10.1111/oik.08890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nan Hu
- Dept of Biology ‐ Aquatic Ecology, Lund Univ. Lund Sweden
| | | | | | - Johan Hollander
- Dept of Biology ‐ Aquatic Ecology, Lund Univ. Lund Sweden
- Global Ocean Inst., World Maritime Univ. Malmö Sweden
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3
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Crown of thorns starfish life-history traits contribute to outbreaks, a continuing concern for coral reefs. Emerg Top Life Sci 2022; 6:67-79. [PMID: 35225331 PMCID: PMC9023020 DOI: 10.1042/etls20210239] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 01/22/2022] [Accepted: 02/03/2022] [Indexed: 11/24/2022]
Abstract
Crown of thorns starfish (COTS, Acanthaster sp.) are notorious for their destructive consumption of coral that decimates tropical reefs, an attribute unique among tropical marine invertebrates. Their populations can rapidly increase from 0–1 COTS ha−1 to more than 10–1000 COTS ha−1 in short order causing a drastic change to benthic communities and reducing the functional and species diversity of coral reef ecosystems. Population outbreaks were first identified to be a significant threat to coral reefs in the 1960s. Since then, they have become one of the leading causes of coral loss along with coral bleaching. Decades of research and significant investment in Australia and elsewhere, particularly Japan, have been directed towards identifying, understanding, and managing the potential causes of outbreaks and designing population control methods. Despite this, the drivers of outbreaks remain elusive. What is becoming increasingly clear is that the success of COTS is tied to their inherent biological traits, especially in early life. Survival of larval and juvenile COTS is likely to be enhanced by their dietary flexibility and resilience to variable food conditions as well as their phenotypically plastic growth dynamics, all magnified by the extreme reproductive potential of COTS. These traits enable COTS to capitalise on anthropogenic disturbances to reef systems as well as endure less favourable conditions.
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Kroeker KJ, Sanford E. Ecological Leverage Points: Species Interactions Amplify the Physiological Effects of Global Environmental Change in the Ocean. ANNUAL REVIEW OF MARINE SCIENCE 2022; 14:75-103. [PMID: 34416127 DOI: 10.1146/annurev-marine-042021-051211] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Marine ecosystems are increasingly impacted by global environmental changes, including warming temperatures, deoxygenation, and ocean acidification. Marine scientists recognize intuitively that these environmental changes are translated into community changes via organismal physiology. However, physiology remains a black box in many ecological studies, and coexisting species in a community are often assumed to respond similarly to environmental stressors. Here, we emphasize how greater attention to physiology can improve our ability to predict the emergent effects of ocean change. In particular, understanding shifts in the intensity and outcome of species interactions such as competition and predation requires a sharpened focus on physiological variation among community members and the energetic demands and trophic mismatches generated by environmental changes. Our review also highlights how key species interactions that are sensitive to environmental change can operate as ecological leverage points through which small changes in abiotic conditions are amplified into large changes in marine ecosystems.
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Affiliation(s)
- Kristy J Kroeker
- Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, California 95064, USA;
| | - Eric Sanford
- Bodega Marine Laboratory, University of California, Davis, Bodega Bay, California 94923, USA;
- Department of Evolution and Ecology, University of California, Davis, California 95616, USA
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5
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Pratchett MS, Caballes CF, Cvitanovic C, Raymundo ML, Babcock RC, Bonin MC, Bozec YM, Burn D, Byrne M, Castro-Sanguino C, Chen CCM, Condie SA, Cowan ZL, Deaker DJ, Desbiens A, Devantier LM, Doherty PJ, Doll PC, Doyle JR, Dworjanyn SA, Fabricius KE, Haywood MDE, Hock K, Hoggett AK, Høj L, Keesing JK, Kenchington RA, Lang BJ, Ling SD, Matthews SA, McCallum HI, Mellin C, Mos B, Motti CA, Mumby PJ, Stump RJW, Uthicke S, Vail L, Wolfe K, Wilson SK. Knowledge Gaps in the Biology, Ecology, and Management of the Pacific Crown-of-Thorns Sea Star Acanthaster sp. on Australia's Great Barrier Reef. THE BIOLOGICAL BULLETIN 2021; 241:330-346. [PMID: 35015620 DOI: 10.1086/717026] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
AbstractCrown-of-thorns sea stars (Acanthaster sp.) are among the most studied coral reef organisms, owing to their propensity to undergo major population irruptions, which contribute to significant coral loss and reef degradation throughout the Indo-Pacific. However, there are still important knowledge gaps pertaining to the biology, ecology, and management of Acanthaster sp. Renewed efforts to advance understanding and management of Pacific crown-of-thorns sea stars (Acanthaster sp.) on Australia's Great Barrier Reef require explicit consideration of relevant and tractable knowledge gaps. Drawing on established horizon scanning methodologies, this study identified contemporary knowledge gaps by asking active and/or established crown-of-thorns sea star researchers to pose critical research questions that they believe should be addressed to improve the understanding and management of crown-of-thorns sea stars on the Great Barrier Reef. A total of 38 participants proposed 246 independent research questions, organized into 7 themes: feeding ecology, demography, distribution and abundance, predation, settlement, management, and environmental change. Questions were further assigned to 48 specific topics nested within the 7 themes. During this process, redundant questions were removed, which reduced the total number of distinct research questions to 172. Research questions posed were mostly related to themes of demography (46 questions) and management (48 questions). The dominant topics, meanwhile, were the incidence of population irruptions (16 questions), feeding ecology of larval sea stars (15 questions), effects of elevated water temperature on crown-of-thorns sea stars (13 questions), and predation on juveniles (12 questions). While the breadth of questions suggests that there is considerable research needed to improve understanding and management of crown-of-thorns sea stars on the Great Barrier Reef, the predominance of certain themes and topics suggests a major focus for new research while also providing a roadmap to guide future research efforts.
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Dutra LXC, Haywood MDE, Singh S, Ferreira M, Johnson JE, Veitayaki J, Kininmonth S, Morris CW, Piovano S. Synergies between local and climate-driven impacts on coral reefs in the Tropical Pacific: A review of issues and adaptation opportunities. MARINE POLLUTION BULLETIN 2021; 164:111922. [PMID: 33632532 DOI: 10.1016/j.marpolbul.2020.111922] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 11/18/2020] [Accepted: 12/03/2020] [Indexed: 06/12/2023]
Abstract
Coral reefs in the tropical Pacific region are exposed to a range of anthropogenic local pressures. Climate change is exacerbating local impacts, causing unprecedented declines in coral reef habitats and bringing negative socio-economic consequences to Pacific communities who depend heavily on coral reefs for food, income and livelihoods. Continued increases in greenhouse gas emissions will drive future climate change, which will accelerate coral reef degradation. Traditional systems of resource governance in Pacific island nations provide a foundation to address local pressures and build reef resilience to climate change. Management and adaptation options should build on the regional diversity of governance systems and traditional knowledge to support community-based initiatives and cross-sectoral cooperation to address local pressures and minimize climate change impacts. Such an inclusive approach will offer enhanced opportunities to develop and implement transformative adaptation solutions, particularly in remote and regional areas where centralized management does not extend.
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Affiliation(s)
- Leo X C Dutra
- CSIRO Oceans and Atmosphere Business Unit, Queensland BioSciences Precinct, St Lucia, Brisbane, QLD 4072, Australia; School of Marine Studies, Faculty of Science, Technology & Environment, School of Agriculture, Geography, Environment, Ocean and Natural Sciences, The University of the South Pacific, The University of the South Pacific, Laucala Bay Road, Suva, Fiji.
| | - Michael D E Haywood
- CSIRO Oceans and Atmosphere Business Unit, Queensland BioSciences Precinct, St Lucia, Brisbane, QLD 4072, Australia
| | - Shubha Singh
- School of Marine Studies, Faculty of Science, Technology & Environment, School of Agriculture, Geography, Environment, Ocean and Natural Sciences, The University of the South Pacific, The University of the South Pacific, Laucala Bay Road, Suva, Fiji
| | - Marta Ferreira
- School of Marine Studies, Faculty of Science, Technology & Environment, School of Agriculture, Geography, Environment, Ocean and Natural Sciences, The University of the South Pacific, The University of the South Pacific, Laucala Bay Road, Suva, Fiji; CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal
| | - Johanna E Johnson
- C(2)O Pacific, Vanuatu & Australia; College of Marine & Environmental Studies, James Cook University, Cairns, QLD 4870, Australia.
| | - Joeli Veitayaki
- School of Marine Studies, Faculty of Science, Technology & Environment, School of Agriculture, Geography, Environment, Ocean and Natural Sciences, The University of the South Pacific, The University of the South Pacific, Laucala Bay Road, Suva, Fiji; The University of the South Pacific, Alafua Campus, Private Bag, Apia, Samoa
| | - Stuart Kininmonth
- School of Marine Studies, Faculty of Science, Technology & Environment, School of Agriculture, Geography, Environment, Ocean and Natural Sciences, The University of the South Pacific, The University of the South Pacific, Laucala Bay Road, Suva, Fiji; Centre for Ecology and Evolutionary Synthesis, University of Oslo, Oslo, Norway
| | - Cherrie W Morris
- Institute of Marine Resources, The University of the South Pacific, Laucala Bay Road, Suva, Fiji
| | - Susanna Piovano
- School of Marine Studies, Faculty of Science, Technology & Environment, School of Agriculture, Geography, Environment, Ocean and Natural Sciences, The University of the South Pacific, The University of the South Pacific, Laucala Bay Road, Suva, Fiji
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7
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Hue T, Chateau O, Lecellier G, Kayal M, Lanos N, Gossuin H, Adjeroud M, Dumas P. Temperature affects the reproductive outputs of coral-eating starfish Acanthaster spp. after adult exposure to near-future ocean warming and acidification. MARINE ENVIRONMENTAL RESEARCH 2020; 162:105164. [PMID: 33099079 DOI: 10.1016/j.marenvres.2020.105164] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/23/2020] [Accepted: 09/28/2020] [Indexed: 06/11/2023]
Abstract
Outbreaks of the coral-eating crown-of-thorns starfish Acanthaster spp. (COTS) have become to be amongst the most severe threats to coral reefs worldwide. Although most research has focused on COTS early development, it remains unclear how COTS populations will keep pace with changing ocean conditions. Since reproduction is a key process contributing to outbreaks, we investigated the reproductive success of adult COTS acclimated for 3-4 months to different treatment combinations of ambient conditions, ocean warming (+2 °C) and acidification (-0.35 pH). Our results suggest that the optimal breeding season in New Caledonia is concentrated around the end of the calendar year, when water temperature reaches >26 °C. We found negative effects of temperature on egg metrics, fertilisation success, and GSI, conflicting with previously documented effects of temperature on echinoderm reproductive outputs. Fertilisation success dropped drastically (more than threefold) with elevated temperature during the late breeding season. In contrast, we detected no effects of near-future acidification conditions on fertilisation success nor GSI. This is the first time that COTS reproduction is compared among individuals acclimated to different conditions of warming and acidification. Our results highlight the importance of accounting for adult exposure to better understand how COTS reproduction may be impacted in the face of global change.
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Affiliation(s)
- Thomas Hue
- IRD, UMR 9220 ENTROPIE, BP A5, Noumea, New Caledonia; Laboratoire d'Excellence "Corail", 58 avenue Paul Alduy, 66860, Perpignan, France.
| | - Olivier Chateau
- Laboratory of Marine Biology and Ecology, Aquarium des lagons, 98807, Noumea, New Caledonia
| | - Gael Lecellier
- IRD, UMR 9220 ENTROPIE, BP A5, Noumea, New Caledonia; Laboratoire d'Excellence "Corail", 58 avenue Paul Alduy, 66860, Perpignan, France; Université de Paris-Saclay, UVSQ, 45 avenue des Etats-Unis, Versailles Cedex, France
| | - Mohsen Kayal
- IRD, UMR 9220 ENTROPIE, BP A5, Noumea, New Caledonia; Laboratoire d'Excellence "Corail", 58 avenue Paul Alduy, 66860, Perpignan, France
| | - Noeline Lanos
- Laboratory of Marine Biology and Ecology, Aquarium des lagons, 98807, Noumea, New Caledonia
| | - Hugues Gossuin
- Laboratory of Marine Biology and Ecology, Aquarium des lagons, 98807, Noumea, New Caledonia
| | - Mehdi Adjeroud
- Laboratoire d'Excellence "Corail", 58 avenue Paul Alduy, 66860, Perpignan, France; UMR 9220 ENTROPIE, IRD, Université de la Réunion, CNRS, IFREMER, Université de la Nouvelle-Calédonie, Perpignan, France; PSL Université Paris, USR 3278 CRIOBE, EPHE-UPVD-CNRS, Perpignan, France
| | - Pascal Dumas
- IRD, UMR 9220 ENTROPIE, BP A5, Noumea, New Caledonia; Laboratoire d'Excellence "Corail", 58 avenue Paul Alduy, 66860, Perpignan, France
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8
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Ravaglioli C, Bulleri F, Rühl S, McCoy SJ, Findlay HS, Widdicombe S, Queirós AM. Ocean acidification and hypoxia alter organic carbon fluxes in marine soft sediments. GLOBAL CHANGE BIOLOGY 2019; 25:4165-4178. [PMID: 31535452 DOI: 10.1111/gcb.14806] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 07/26/2019] [Accepted: 07/27/2019] [Indexed: 06/10/2023]
Abstract
Anthropogenic stressors can alter the structure and functioning of infaunal communities, which are key drivers of the carbon cycle in marine soft sediments. Nonetheless, the compounded effects of anthropogenic stressors on carbon fluxes in soft benthic systems remain largely unknown. Here, we investigated the cumulative effects of ocean acidification (OA) and hypoxia on the organic carbon fate in marine sediments, through a mesocosm experiment. Isotopically labelled macroalgal detritus (13 C) was used as a tracer to assess carbon incorporation in faunal tissue and in sediments under different experimental conditions. In addition, labelled macroalgae (13 C), previously exposed to elevated CO2 , were also used to assess the organic carbon uptake by fauna and sediments, when both sources and consumers were exposed to elevated CO2 . At elevated CO2 , infauna increased the uptake of carbon, likely as compensatory response to the higher energetic costs faced under adverse environmental conditions. By contrast, there was no increase in carbon uptake by fauna exposed to both stressors in combination, indicating that even a short-term hypoxic event may weaken the ability of marine invertebrates to withstand elevated CO2 conditions. In addition, both hypoxia and elevated CO2 increased organic carbon burial in the sediment, potentially affecting sediment biogeochemical processes. Since hypoxia and OA are predicted to increase in the face of climate change, our results suggest that local reduction of hypoxic events may mitigate the impacts of global climate change on marine soft-sediment systems.
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Affiliation(s)
| | - Fabio Bulleri
- Dipartimento di Biologia, Università di Pisa, CoNISMa, Pisa, Italy
| | - Saskia Rühl
- Plymouth Marine Laboratory, Plymouth, UK
- Southampton University, Southampton, UK
| | - Sophie J McCoy
- Department of Biological Sciences, Florida State University, Tallahassee, FL, USA
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9
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Dworjanyn SA, Byrne M. Impacts of ocean acidification on sea urchin growth across the juvenile to mature adult life-stage transition is mitigated by warming. Proc Biol Sci 2019; 285:rspb.2017.2684. [PMID: 29643209 DOI: 10.1098/rspb.2017.2684] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 03/19/2018] [Indexed: 11/12/2022] Open
Abstract
Understanding how growth trajectories of calcifying invertebrates are affected by changing climate requires acclimation experiments that follow development across life-history transitions. In a long-term acclimation study, the effects of increased acidification and temperature on survival and growth of the tropical sea urchin Tripneustes gratilla from the early juvenile (5 mm test diameter-TD) through the developmental transition to the mature adult (60 mm TD) were investigated. Juveniles were reared in a combination of three temperature and three pH/pCO2 treatments, including treatments commensurate with global change projections. Elevated temperature and pCO2/pH both affected growth, but there was no interaction between these factors. The urchins grew more slowly at pH 7.6, but not at pH 7.8. Slow growth may be influenced by the inability to compensate coelomic fluid acid-base balance at pH 7.6. Growth was faster at +3 and +6°C compared to that in ambient temperature. Acidification and warming had strong and interactive effects on reproductive potential. Warming increased the gonad index, but acidification decreased it. At pH 7.6 there were virtually no gonads in any urchins regardless of temperature. The T. gratilla were larger at maturity under combined near-future warming and acidification scenarios (+3°C/pH 7.8). Although the juveniles grew and survived in near-future warming and acidification conditions, chronic exposure to these stressors from an early stage altered allocation to somatic and gonad growth. In the absence of phenotypic adjustment, the interactive effects of warming and acidification on the benthic life phases of sea urchins may compromise reproductive fitness and population maintenance as global climatic change unfolds.
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Affiliation(s)
- Symon A Dworjanyn
- National Marine Science Centre, Southern Cross University, PO Box 4321, Coffs Harbour, New South Wales 2450, Australia
| | - Maria Byrne
- School of Medical Sciences and School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales 2006, Australia
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Leung JYS, Nagelkerken I, Russell BD, Ferreira CM, Connell SD. Boosted nutritional quality of food by CO 2 enrichment fails to offset energy demand of herbivores under ocean warming, causing energy depletion and mortality. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 639:360-366. [PMID: 29791888 DOI: 10.1016/j.scitotenv.2018.05.161] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 05/05/2018] [Accepted: 05/13/2018] [Indexed: 06/08/2023]
Abstract
The CO2-boosted trophic transfer from primary producers to herbivores has been increasingly discovered at natural CO2 vents and in laboratory experiments. Despite the emerging knowledge of this boosting effect, we do not know the extent to which it may be enhanced or dampened by ocean warming. We investigated whether ocean acidification and warming enhance the nutritional quality (C:N ratio) and energy content of turf algae, which is speculated to drive higher feeding rate, greater energy budget and eventually faster growth of herbivores. This proposal was tested by observing the physiological (feeding rate, respiration rate and energy budget) and demographic responses (growth and survival) of a common grazing gastropod (Phasianella australis) to ocean acidification and warming in a 6-month mesocosm experiment. Whilst we observed the boosting effect of ocean acidification and warming in isolation on the energy budget of herbivores by either increasing feeding rate on the more nutritious algae or increasing energy gain per feeding effort, their growth and survival were reduced by the sublethal thermal stress under ocean warming, especially when both climate change stressors were combined. This reduced growth and survival occurred as a consequence of depleted energy reserves, suggesting that the boosting effect via trophic transfer might not sufficiently compensate for the increased energy demand imposed by ocean warming. In circumstances where ocean acidification and warming create an energy demand on herbivores that outweighs the energy enhancement of their food (i.e. primary producers), the performance of herbivores to control their blooming resources likely deteriorates and thus runaway primary production ensues.
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Affiliation(s)
- Jonathan Y S Leung
- Southern Seas Ecology Laboratories, The Environment Institute, School of Biological Sciences, The University of Adelaide, South Australia, Australia.
| | - Ivan Nagelkerken
- Southern Seas Ecology Laboratories, The Environment Institute, School of Biological Sciences, The University of Adelaide, South Australia, Australia
| | - Bayden D Russell
- Southern Seas Ecology Laboratories, The Environment Institute, School of Biological Sciences, The University of Adelaide, South Australia, Australia; The Swire Institute of Marine Science, School of Biological Sciences, The University of Hong Kong, Hong Kong Special Administrative Region
| | - Camilo M Ferreira
- Southern Seas Ecology Laboratories, The Environment Institute, School of Biological Sciences, The University of Adelaide, South Australia, Australia
| | - Sean D Connell
- Southern Seas Ecology Laboratories, The Environment Institute, School of Biological Sciences, The University of Adelaide, South Australia, Australia
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Needleman RK, Neylan IP, Erickson TB. Environmental and Ecological Effects of Climate Change on Venomous Marine and Amphibious Species in the Wilderness. Wilderness Environ Med 2018; 29:343-356. [DOI: 10.1016/j.wem.2018.04.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 04/12/2018] [Accepted: 04/18/2018] [Indexed: 01/22/2023]
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12
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Kamya PZ, Byrne M, Mos B, Hall L, Dworjanyn SA. Indirect effects of ocean acidification drive feeding and growth of juvenile crown-of-thorns starfish, Acanthaster planci. Proc Biol Sci 2018; 284:rspb.2017.0778. [PMID: 28592677 DOI: 10.1098/rspb.2017.0778] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 05/09/2017] [Indexed: 11/12/2022] Open
Abstract
The indirect effects of changing climate in modulating trophic interactions can be as important as the direct effects of climate stressors on consumers. The success of the herbivorous juvenile stage of the crown-of-thorns starfish (COTS), Acanthaster planci, may be affected by the impacts of ocean conditions on its crustose coralline algal (CCA) food. To partition the direct effects of near future ocean acidification on juvenile COTS and indirect effects through changes in their CCA food, COTS were grown in three pHT levels (7.9, 7.8, 7.6) and fed CCA grown at similar pH levels. Consumption of CCA by COTS was bolstered when the COTS were grown in low pH and when they were fed CCA grown in low pH regardless of the pH in which the COTS were reared. COTS fed CCA grown at pH 7.6 grew fastest, but the pH/pCO2 that the COTS were reared in had no direct effect on growth. Ocean acidification conditions decreased the C : N ratio and carbonate levels in the CCA. Bolstered growth in COTS may be driven by enhanced palatability, increased nutritive state and reduced defences of their CCA food. These results indicate that near future acidification will increase the success of early juvenile COTS and boost recruitment into the coral-eating life stage.
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Affiliation(s)
- Pamela Z Kamya
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales, Australia
| | - Maria Byrne
- School of Medical Science and School of Life Science, University of Sydney, Sydney, New South Wales, Australia
| | - Benjamin Mos
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales, Australia
| | - Lauren Hall
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales, Australia
| | - Symon A Dworjanyn
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales, Australia
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13
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Thirty Years of Research on Crown-of-Thorns Starfish (1986–2016): Scientific Advances and Emerging Opportunities. DIVERSITY-BASEL 2017. [DOI: 10.3390/d9040041] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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