1
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Finnegan S, Harnik PG, Lockwood R, Lotze HK, McClenachan L, Kahanamoku SS. Using the Fossil Record to Understand Extinction Risk and Inform Marine Conservation in a Changing World. Ann Rev Mar Sci 2024; 16:307-333. [PMID: 37683272 DOI: 10.1146/annurev-marine-021723-095235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/10/2023]
Abstract
Understanding the long-term effects of ongoing global environmental change on marine ecosystems requires a cross-disciplinary approach. Deep-time and recent fossil records can contribute by identifying traits and environmental conditions associated with elevated extinction risk during analogous events in the geologic past and by providing baseline data that can be used to assess historical change and set management and restoration targets and benchmarks. Here, we review the ecological and environmental information available in the marine fossil record and discuss how these archives can be used to inform current extinction risk assessments as well as marine conservation strategies and decision-making at global to local scales. As we consider future research directions in deep-time and conservationpaleobiology, we emphasize the need for coproduced research that unites researchers, conservation practitioners, and policymakers with the communities for whom the impacts of climate and global change are most imminent.
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Affiliation(s)
- Seth Finnegan
- Department of Integrative Biology, University of California, Berkeley, California, USA; ,
| | - Paul G Harnik
- Department of Earth and Environmental Geosciences, Colgate University, Hamilton, New York, USA;
| | - Rowan Lockwood
- Department of Geology, William & Mary, Williamsburg, Virginia, USA;
| | - Heike K Lotze
- Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada;
| | - Loren McClenachan
- Department of History and School of Environmental Studies, University of Victoria, Victoria, British Columbia, Canada;
| | - Sara S Kahanamoku
- Department of Integrative Biology, University of California, Berkeley, California, USA; ,
- Hawai'i Sea Grant College Program, University of Hawai'i at Mānoa, Honolulu, Hawai'i, USA
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2
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Murphy GE, Kelly NE, Lotze HK, Wong MC. Incorporating anthropogenic thresholds to improve understanding of cumulative effects on seagrass beds. Facets (Ott) 2022. [DOI: 10.1139/facets-2021-0130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Cumulative human impact analysis is a promising management tool to estimate the impacts of stressors on ecosystems caused by multiple human activities. However, connecting cumulative impact scores to actual ecosystem change at appropriate spatial scales remains challenging. Here, we calculated cumulative effects (CE) scores for 187 seagrass beds in Atlantic Canada that accounts for both bay-scale and local-scale anthropogenic activities. We then developed a CE threshold to evaluate where degradation of seagrass beds from multiple human activities is more likely. Overall, the CE score was the best predictor of human impacts for seagrass beds. Locations with high watershed land alteration and nitrogen loading had the highest CE scores; however, we also identified seagrass beds with high CE scores in regions characterized by generally low levels of human activities. Forty-nine seagrass beds exceeded the CE threshold and, of these, 86% had CE scores that were influenced by three or more stressors that cumulatively amounted to a large score. This CE threshold approach can provide a simplified metric to identify areas where management of cumulative effects should be prioritized and further highlights the need to consider multiple human activities when assessing anthropogenic impacts to coastal habitats.
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Affiliation(s)
- Grace E.P. Murphy
- Bedford Institute of Oceanography, Fisheries and Oceans Canada, 1 Challenger Drive, Dartmouth, NS B2Y 4A2, Canada
| | - Noreen E. Kelly
- Bedford Institute of Oceanography, Fisheries and Oceans Canada, 1 Challenger Drive, Dartmouth, NS B2Y 4A2, Canada
| | - Heike K. Lotze
- Department of Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Melisa C. Wong
- Bedford Institute of Oceanography, Fisheries and Oceans Canada, 1 Challenger Drive, Dartmouth, NS B2Y 4A2, Canada
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3
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Lotze HK, Mellon S, Coyne J, Betts M, Burchell M, Fennel K, Dusseault MA, Fuller SD, Galbraith E, Garcia Suarez L, de Gelleke L, Golombek N, Kelly B, Kuehn SD, Oliver E, MacKinnon M, Muraoka W, Predham IT, Rutherford K, Shackell N, Sherwood O, Sibert EC, Kienast M. Long-term ocean and resource dynamics in a hotspot of climate change. Facets (Ott) 2022. [DOI: 10.1139/facets-2021-0197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The abundance, distribution, and size of marine species are linked to temperature and nutrient regimes and are profoundly affected by humans through exploitation and climate change. Yet little is known about long-term historical links between ocean environmental changes and resource abundance to provide context for current and potential future trends and inform conservation and management. We synthesize >4000 years of climate and marine ecosystem dynamics in a Northwest Atlantic region currently undergoing rapid changes, the Gulf of Maine and Scotian Shelf. This period spans the late Holocene cooling and recent warming and includes both Indigenous and European influence. We compare environmental records from instrumental, sedimentary, coral, and mollusk archives with ecological records from fossils, archaeological, historical, and modern data, and integrate future model projections of environmental and ecosystem changes. This multidisciplinary synthesis provides insight into multiple reference points and shifting baselines of environmental and ecosystem conditions, and projects a near-future departure from natural climate variability in 2028 for the Scotian Shelf and 2034 for the Gulf of Maine. Our work helps advancing integrative end-to-end modeling to improve the predictive capacity of ecosystem forecasts with climate change. Our results can be used to adjust marine conservation strategies and network planning and adapt ecosystem-based management with climate change.
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Affiliation(s)
- Heike K. Lotze
- Department of Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Stefanie Mellon
- Department of Oceanography, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Jonathan Coyne
- Department of Oceanography, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Matthew Betts
- Canadian Museum of History, Gatineau, QC K1A 0M8, Canada
| | - Meghan Burchell
- Department of Archaeology, Memorial University of Newfoundland, St. John’s, NL A1C 5S7, Canada
| | - Katja Fennel
- Department of Oceanography, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Marisa A. Dusseault
- Department of Archaeology, Memorial University of Newfoundland, St. John’s, NL A1C 5S7, Canada
| | | | - Eric Galbraith
- Department of Earth and Planetary Sciences, McGill University, Montreal, QC H3A 0E8, Canada
- Institut de Ciència i Tecnologia Ambientals (ICTA-UAB), Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Lina Garcia Suarez
- Department of Oceanography, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Laura de Gelleke
- Department of Oceanography, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Nina Golombek
- Department of Earth and Environmental Sciences, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | | | - Sarah D. Kuehn
- Department of Archaeology, Memorial University of Newfoundland, St. John’s, NL A1C 5S7, Canada
| | - Eric Oliver
- Department of Oceanography, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Megan MacKinnon
- Department of Archaeology, Memorial University of Newfoundland, St. John’s, NL A1C 5S7, Canada
| | - Wendy Muraoka
- Department of Oceanography, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Ian T.G. Predham
- Department of Archaeology, Memorial University of Newfoundland, St. John’s, NL A1C 5S7, Canada
| | - Krysten Rutherford
- Department of Oceanography, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Nancy Shackell
- Ocean and Ecosystem Sciences Division, Fisheries and Oceans Canada, Dartmouth, NS B3B 1J6, Canada
| | - Owen Sherwood
- Department of Earth and Environmental Sciences, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Elizabeth C. Sibert
- Department of Earth and Planetary Sciences, Yale University, PO Box 208109, New Haven, CT 06520, USA
- Yale Institute for Biospheric Studies, Yale University, 170 Whitney Avenue, New Haven, CT 06511, USA
| | - Markus Kienast
- Department of Oceanography, Dalhousie University, Halifax, NS B3H 4R2, Canada
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4
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Sumaila UR, Skerritt DJ, Schuhbauer A, Villasante S, Cisneros-Montemayor AM, Sinan H, Burnside D, Abdallah PR, Abe K, Addo KA, Adelsheim J, Adewumi IJ, Adeyemo OK, Adger N, Adotey J, Advani S, Afrin Z, Aheto D, Akintola SL, Akpalu W, Alam L, Alava JJ, Allison EH, Amon DJ, Anderies JM, Anderson CM, Andrews E, Angelini R, Anna Z, Antweiler W, Arizi EK, Armitage D, Arthur RI, Asare N, Asche F, Asiedu B, Asuquo F, Badmus L, Bailey M, Ban N, Barbier EB, Barley S, Barnes C, Barrett S, Basurto X, Belhabib D, Bennett E, Bennett NJ, Benzaken D, Blasiak R, Bohorquez JJ, Bordehore C, Bornarel V, Boyd DR, Breitburg D, Brooks C, Brotz L, Campbell D, Cannon S, Cao L, Cardenas Campo JC, Carpenter S, Carpenter G, Carson RT, Carvalho AR, Castrejón M, Caveen AJ, Chabi MN, Chan KMA, Chapin FS, Charles T, Cheung W, Christensen V, Chuku EO, Church T, Clark C, Clarke TM, Cojocaru AL, Copeland B, Crawford B, Crépin AS, Crowder LB, Cury P, Cutting AN, Daily GC, Da-Rocha JM, Das A, de la Puente S, de Zeeuw A, Deikumah SKS, Deith M, Dewitte B, Doubleday N, Duarte CM, Dulvy NK, Eddy T, Efford M, Ehrlich PR, Elsler LG, Fakoya KA, Falaye AE, Fanzo J, Fitzsimmons C, Flaaten O, Florko KRN, Aviles MF, Folke C, Forrest A, Freeman P, Freire KMF, Froese R, Frölicher TL, Gallagher A, Garcon V, Gasalla MA, Gephart JA, Gibbons M, Gillespie K, Giron-Nava A, Gjerde K, Glaser S, Golden C, Gordon L, Govan H, Gryba R, Halpern BS, Hanich Q, Hara M, Harley CDG, Harper S, Harte M, Helm R, Hendrix C, Hicks CC, Hood L, Hoover C, Hopewell K, Horta E Costa BB, Houghton JDR, Iitembu JA, Isaacs M, Isahaku S, Ishimura G, Islam M, Issifu I, Jackson J, Jacquet J, Jensen OP, Ramon JJ, Jin X, Jonah A, Jouffray JB, Juniper SK, Jusoh S, Kadagi I, Kaeriyama M, Kaiser MJ, Kaiser BA, Kakujaha-Matundu O, Karuaihe ST, Karumba M, Kemmerly JD, Khan AS, Kimani P, Kleisner K, Knowlton N, Kotowicz D, Kurien J, Kwong LE, Lade S, Laffoley D, Lam ME, Lam VWL, Lange GM, Latif MT, Le Billon P, Le Brenne V, Le Manach F, Levin SA, Levin L, Limburg KE, List J, Lombard AT, Lopes PFM, Lotze HK, Mallory TG, Mangar RS, Marszalec D, Mattah P, Mayorga J, McAusland C, McCauley DJ, McLean J, McMullen K, Meere F, Mejaes A, Melnychuk M, Mendo J, Micheli F, Millage K, Miller D, Mohamed KS, Mohammed E, Mokhtar M, Morgan L, Muawanah U, Munro GR, Murray G, Mustafa S, Nayak P, Newell D, Nguyen T, Noack F, Nor AM, Nunoo FKE, Obura D, Okey T, Okyere I, Onyango P, Oostdijk M, Orlov P, Österblom H, Owens D, Owens T, Oyinlola M, Pacoureau N, Pakhomov E, Abrantes JP, Pascual U, Paulmier A, Pauly D, Pèlèbè ROE, Peñalosa D, Pennino MG, Peterson G, Pham TTT, Pinkerton E, Polasky S, Polunin NVC, Prah E, Ramírez J, Relano V, Reygondeau G, Robadue D, Roberts C, Rogers A, Roumbedakis K, Sala E, Scheffer M, Segerson K, Seijo JC, Seto KC, Shogren JF, Silver JJ, Singh G, Soszynski A, Splichalova DV, Spring M, Stage J, Stephenson F, Stewart BD, Sultan R, Suttle C, Tagliabue A, Tall A, Talloni-Álvarez N, Tavoni A, Taylor DRF, Teh LSL, Teh LCL, Thiebot JB, Thiele T, Thilsted SH, Thumbadoo RV, Tigchelaar M, Tol RSJ, Tortell P, Troell M, Uzmanoğlu MS, van Putten I, van Santen G, Villaseñor-Derbez JC, Wabnitz CCC, Walsh M, Walsh JP, Wambiji N, Weber EU, Westley F, Williams S, Wisz MS, Worm B, Xiao L, Yagi N, Yamazaki S, Yang H, Zeller D. WTO must ban harmful fisheries subsidies. Science 2021; 374:544. [PMID: 34709891 DOI: 10.1126/science.abm1680] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- U Rashid Sumaila
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.,School of Public Policy and Global Affairs, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Daniel J Skerritt
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Anna Schuhbauer
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Sebastian Villasante
- Cross-Research in Environmental Technologies, Department of Applied Economics, University of Santiago de Compostela, Santiago de Compostela, 15782, Spain
| | | | - Hussain Sinan
- Marine Affairs Program, Dalhousie University, Halifax, NS, B3H 4R2, Canada
| | - Duncan Burnside
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Patrízia Raggi Abdallah
- Instituto de Ciências Econômicas, Administrativas e Contábeis, Universidade Federal do Rio Grande, Rio Grande, RS, Brazil
| | - Keita Abe
- Centre for Applied Research at Norwegian School of Economics, Bergen, Norway
| | - Kwasi A Addo
- Institute for Environment and Sanitation Studies, University of Ghana, Accra, Ghana
| | - Julia Adelsheim
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Ibukun J Adewumi
- Global Ocean Accounts Partnership, University of New South Wales, Sydney, NSW, Australia.,African Marine Environment Sustainability Initiative, Lagos, Nigeria
| | - Olanike K Adeyemo
- Fish and Wildlife Unit, Department of Veterinary Public Health & Preventive Medicine, University of Ibadan, Ibadan, Nigeria
| | - Neil Adger
- Department of Geography, College of Life and Environmental Sciences, University of Exeter, EX44RJ, UK
| | - Joshua Adotey
- Centre for Coastal Management, Africa Centre of Excellence in Coastal Resilience, University of Cape Coast, Cape Coast, Ghana
| | - Sahir Advani
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.,Dakshin Foundation, Bengaluru, India
| | - Zahidah Afrin
- The World Maritime University-Sasakawa Global Ocean Institute, World Maritime University, Malmö, Sweden
| | - Denis Aheto
- Department of Fisheries and Aquatic Sciences, University of Cape Coast, Ghana
| | | | - Wisdom Akpalu
- School of Research and Graduate Studies, Ghana Institute of Management and Public Administration, Achimota-Accra, Ghana
| | - Lubna Alam
- Institute for Environment and Development, Universiti Kebangsaan Malaysia, Bangi, Malaysia
| | - Juan José Alava
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | | | | | - John M Anderies
- School of Human Evolution and Social Change, Arizona State University, Tempe, AZ 85287, USA.,School of Sustainability, Arizona State University, Tempe, AZ 85287, USA
| | - Christopher M Anderson
- School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98195, USA
| | - Evan Andrews
- Ocean Frontier Institute, Memorial University of Newfoundland, St. John's, NL, A1B 3X5, Canada
| | - Ronaldo Angelini
- Civil Engineering Department, Federal University of Rio Grande do Norte, Campus Universitário Lagoa Nova, CP 1524, Natal/RN, Brazil
| | - Zuzy Anna
- Faculty of Fisheries and Marine Science, Universitas Padjadjaran, Bandung 40132, Indonesia.,SDGs Center, Universitas Padjadjaran, Bandung 40132, Indonesia
| | - Werner Antweiler
- Sauder School of Business, University of British Columbia, Vancouver, BC V6T 1Z2, Canada
| | - Evans K Arizi
- Centre for Coastal Management, Africa Centre of Excellence in Coastal Resilience, University of Cape Coast, Cape Coast, Ghana.,Department of Fisheries and Aquatic Sciences, University of Cape Coast, Ghana
| | - Derek Armitage
- School of Environment, Resources and Sustainability, University of Waterloo, Waterloo, ON, Canada
| | - Robert I Arthur
- Woodhill Solutions, Glyneath House, Longtown, Herefordshire, UK
| | - Noble Asare
- Department of Fisheries and Aquatic Sciences, Africa Centre of Excellence in Coastal Resilience, University of Cape Coast, Cape Coast, Ghana
| | - Frank Asche
- School of Forest, Fisheries, and Geomatics Sciences, University of Florida, Gainesville, FL 32603, USA.,Department of Industrial Economics, University of Stavanger, Stavanger, Norway
| | - Berchie Asiedu
- Department of Fisheries and Water Resources, School of Natural Resources, University of Energy and Natural Resources, Sunyani, Ghana
| | - Francis Asuquo
- Department of Oceanography, University of Calabar, Nigeria
| | - Lanre Badmus
- World Aquaculture Society, African Chapter West African Region, Ibadan, Nigeria
| | - Megan Bailey
- Marine Affairs Program, Dalhousie University, Halifax, NS, B3H 4R2, Canada
| | - Natalie Ban
- School of Environmental Studies, University of Victoria, Victoria, BC V8P 5C2, Canada
| | - Edward B Barbier
- Department of Economics, Colorado State University, Fort Collins, CO 80523-1771, USA
| | - Shanta Barley
- Minderoo Foundation, Broadway Nedlands, WA 6009, Australia
| | - Colin Barnes
- Centre for Environment, Energy and Natural Resource Governance, University of Cambridge, CB2 3QZ, UK
| | | | - Xavier Basurto
- Nicholas School of the Environment, Duke University, Beaufort, NC 28516, USA
| | | | - Elena Bennett
- Department of Natural Resource Sciences and Bieler School of Environment, McGill University, Montreal, QC H3A 0G4, Canada
| | - Nathan J Bennett
- The Peopled Seas Initiative, Vancouver, BC, Canada.,People and the Ocean Specialist Group, Commission on Environmental, Economic and Social Policy, International Union for Conservation of Nature, Gland, Switzerland
| | - Dominique Benzaken
- Australian National Centre for Ocean Resources and Security, Wollongong, NSW, Australia
| | - Robert Blasiak
- Stockholm Resilience Centre, Stockholm University, 10691, Stockholm, Sweden.,Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - John J Bohorquez
- School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794, USA
| | - Cesar Bordehore
- Department of Ecology, University of Alicante, 03690 Alicante, Spain
| | - Virginie Bornarel
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - David R Boyd
- School of Public Policy and Global Affairs, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | | | - Cassandra Brooks
- Environmental Studies, University of Colorado, Boulder, CO 80303-0397, USA
| | - Lucas Brotz
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Donovan Campbell
- Department of Geography and Geology, The University of the West Indies, Kingston, Jamaica
| | - Sara Cannon
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.,Department of Geography, University of British Columbia, Vancouver, BC, Canada
| | - Ling Cao
- School of Oceanography, Shanghai Jiao Tong University, Shanghai, China
| | | | - Steve Carpenter
- Center for Limnology, University of Wisconsin-Madison, Madison WI 53706, USA
| | | | - Richard T Carson
- Department of Economics, University of California, San Diego, La Jolla, CA 92093, USA
| | - Adriana R Carvalho
- Department of Ecology, Federal University of Rio Grande do Norte, Natal, 59078-970, Brazil
| | - Mauricio Castrejón
- Grupo de Investigación en Biodiversidad, Medio Ambiente y Salud, Universidad de Las Américas, Quito, Ecuador
| | - Alex J Caveen
- Biological and Marine Sciences, Hull University, Hull, HU6 7RX, UK
| | - M Nicole Chabi
- Hokkaido University, Institute for the Advancement of Higher Education, Hokkaido, Japan
| | - Kai M A Chan
- Institute for Resources, Environment, and Sustainability, The University of British Columbia, Vancouver, BC, Canada
| | - F Stuart Chapin
- Institute of Arctic Biology, University of Alaska, Fairbanks, AK 99775, USA
| | - Tony Charles
- School of the Environment, Saint Mary's University, Halifax, NS, B3H 3C3, Canada.,School of Business, Saint Mary's University, Halifax, NS, B3H 3C3, Canada
| | - William Cheung
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Villy Christensen
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Ernest O Chuku
- Centre for Coastal Management, Africa Centre of Excellence in Coastal Resilience, University of Cape Coast, Cape Coast, Ghana
| | - Trevor Church
- Faculty of Land and Food Systems, University of British Columbia, Vancouver, BC, Canada
| | - Colin Clark
- Department of Mathematics, University of British Columbia, Vancouver, BC, Canada
| | - Tayler M Clarke
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Andreea L Cojocaru
- Department of Innovation, Management and Marketing, University of Stavanger Business School, University of Stavanger, 4036 Stavanger, Norway
| | - Brian Copeland
- Vancouver School of Economics, University of British Columbia, Vancouver, BC, Canada
| | - Brian Crawford
- Coastal Resources Center, Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, USA
| | - Anne-Sophie Crépin
- Stockholm Resilience Centre, Stockholm University, 10691, Stockholm, Sweden.,The Beijer Institute of Ecological Economics, The Royal Swedish Academy of Sciences, 10405, Stockholm, Sweden
| | - Larry B Crowder
- Hopkins Marine Station of Stanford University, Pacific Grove, CA 93950, USA
| | - Philippe Cury
- Institut de Recherche pour le Développement, Marseille, France
| | - Allison N Cutting
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Gretchen C Daily
- Natural Capital Project, Biology Department and Woods Institute for the Environment, Stanford University, Stanford, CA 94305, USA
| | - Jose Maria Da-Rocha
- Economics and Business Administration for Society, Universidade de Vigo, As Lagoas, Campus Universitario, 32004 Ourense, Spain.,Facultade de Ciencias Empresariais e Turismo, Universidade de Vigo, As Lagoas, Campus Universitario, 32004 Ourense, Spain
| | - Abhipsita Das
- Department of Applied Economics, Auburn University, College of Agriculture, Auburn, AL 36849, USA
| | - Santiago de la Puente
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Aart de Zeeuw
- Tilburg Sustainability Center and Department of Economics, Tilburg University, 5000 LE Tilburg, Netherlands
| | - Savior K S Deikumah
- Centre for Coastal Management, Africa Centre of Excellence in Coastal Resilience, University of Cape Coast, Cape Coast, Ghana
| | - Mairin Deith
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Boris Dewitte
- Center for Advanced Studies in Arid Zones, Campus Andrés Bello Universidad de La Serena, La Serena, Chile
| | - Nancy Doubleday
- Faculty of Humanities, McMaster University, Hamilton, ON, Canada
| | - Carlos M Duarte
- Red Sea Research Centre and Computational Bioscience Research Center, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia.,Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
| | - Nicholas K Dulvy
- Earth to Ocean Research Group, Department of Biological Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - Tyler Eddy
- Fisheries & Marine Institute, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Meaghan Efford
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Paul R Ehrlich
- Center for Conservation Biology, Department of Biology, Stanford University, Stanford, CA 94305, USA
| | - Laura G Elsler
- World Maritime University of the International Maritime Organization, a Specialized Agency of the United Nations, Malmö, Sweden
| | | | - A Eyiwunmi Falaye
- Department of Aquaculture and Fisheries Management, University of Ibadan, Ibadan, Nigeria
| | - Jessica Fanzo
- Berman Institute of Bioethics, Nitze School of Advanced International Studies, Baltimore, MD 21205, USA
| | - Clare Fitzsimmons
- School of Natural and Environmental Sciences, Newcastle University, Newcastle-upon-Tyne, UK
| | - Ola Flaaten
- The Norwegian College of Fishery Science, The Arctic University of Norway, Langnes, 9037, Tromsø, Norway
| | - Katie R N Florko
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Marta Flotats Aviles
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Carl Folke
- Stockholm Resilience Centre, Stockholm University, 10691, Stockholm, Sweden
| | | | - Peter Freeman
- Coastal Resources Center, Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, USA
| | - Kátia M F Freire
- Departamento de Engenharia de Pesca e Aquicultura, Universidade Federal de Sergipe, São Cristóvão, Sergipe, Brazil
| | - Rainer Froese
- Geomar-Helmholtz Centre for Ocean Research, 24105 Kiel, Germany
| | - Thomas L Frölicher
- Climate and Environmental Physics, Physics Institute, University of Bern, Bern, Switzerland.,Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland
| | | | - Veronique Garcon
- Centre National de la Recherche Scientifique, Laboratory of Space Geophysical and Oceanographic Studies, Toulouse, France
| | - Maria A Gasalla
- University of Sao Paulo, Oceanographic Institute, Fisheries Ecosystems Laboratory, São Paulo, 05508-120, Brazil
| | - Jessica A Gephart
- Department of Environmental Science, American University, Washington, DC 20016, USA
| | - Mark Gibbons
- Biodiversity and Conservation Biology, University of the Western Cape, Belville, Western Cape, South Africa.,University of Western Cape, Cape Town, South Africa
| | - Kyle Gillespie
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Alfredo Giron-Nava
- Stanford Center for Ocean Solutions, Stanford University, Stanford, CA 94305, USA
| | - Kristina Gjerde
- IUCN Global Marine and Polar Programme, Cambridge, MA 02138, USA
| | - Sarah Glaser
- Secure Fisheries, a program of One Earth Future foundation, Broomfield, CO 80021, USA
| | - Christopher Golden
- Department of Nutrition, Harvard TH Chan School of Public Health, Boston, MA 02115, USA
| | - Line Gordon
- Global Resilience Partnership, Stockholm, Sweden
| | - Hugh Govan
- School of Government, Development and International Affairs, University of the South Pacific, Suva, Fiji
| | - Rowenna Gryba
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.,Department of Statistics, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Benjamin S Halpern
- Bren School of Environmental Science and Management, University of California, Santa Barbara, CA 93117, USA.,National Center for Ecological Analysis and Synthesis, Santa Barbara, CA 93101, USA
| | - Quentin Hanich
- Australian National Centre for Ocean Resources and Security, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Mafaniso Hara
- Faculty of Economic and Management Sciences, University of the Western Cape, Bellville 7535, South Africa
| | - Christopher D G Harley
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.,Department of Zoology, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Sarah Harper
- School of Environmental Studies, University of Victoria, Victoria, BC V8P 5C2, Canada
| | - Michael Harte
- College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA
| | - Rebecca Helm
- University of North Carolina, Asheville, NC 28804, USA.,Smithsonian Institution National Museum of Natural History, Washington, DC 20560, USA
| | - Cullen Hendrix
- Josef Korbel School of International Studies, University of Denver, Denver, CO 80208, USA.,Peterson Institute for International Economics, Washington, DC 20036, USA
| | - Christina C Hicks
- Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK
| | - Lincoln Hood
- Marine Futures Laboratory and Sea Around Us - Indian Ocean, School of Biological Sciences, University of Western Australia, Crawley, WA, Australia
| | - Carie Hoover
- Marine Affairs Program, Dalhousie University, Halifax, NS, B3H 4R2, Canada
| | - Kristen Hopewell
- School of Public Policy and Global Affairs, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Bárbara B Horta E Costa
- Center of Marine Sciences, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - Jonathan D R Houghton
- School of Biological Sciences, Queen's University Belfast, Belfast, Co. Antrim, Northern Ireland
| | - Johannes A Iitembu
- Department of Fisheries and Ocean Sciences, Sam Nujoma Campus, University of Namibia, Henties Bay, Namibia
| | - Moenieba Isaacs
- Institute for Poverty, Land and Agrarian Studies, School of Government, Faculty of Economic and Management Sciences, University of the Western Cape, Cape Town, South Africa
| | - Sadique Isahaku
- General Education Academic and Career Pathway, Milwaukee Area Technical College, Milwaukee, WI 53233, USA
| | | | - Monirul Islam
- Department of Fisheries, University of Dhaka, Dhaka-1000, Bangladesh
| | - Ibrahim Issifu
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Jeremy Jackson
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92037, USA
| | | | - Olaf P Jensen
- Center for Limnology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | | | - Xue Jin
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.,Ocean Development Research Institute, Major Research Base of Humanities and Social Sciences Ministry of Education, Ocean University of China, Qingdao 266100, China
| | - Alberta Jonah
- Centre for Coastal Management, Africa Centre of Excellence in Coastal Resilience, University of Cape Coast, Cape Coast, Ghana
| | | | - S Kim Juniper
- School of Earth and Ocean Sciences University of Victoria, Victoria, BC V8W 2Y2, Canada.,Department of Biology, University of Victoria, Victoria, BC V8W 2Y2, Canada
| | - Sufian Jusoh
- Institute of Malaysian and International Studies, Universiti Kebangsaan, Malaysia
| | | | - Masahide Kaeriyama
- Hokkaido University, Institute for the Advancement of Higher Education, Hokkaido, Japan
| | - Michel J Kaiser
- The Lyell Centre, Institute of Life and Earth Sciences, Heriot-Watt University, Edinburgh, EH14 4AP, UK
| | - Brooks Alexandra Kaiser
- Department of Sociology, Environmental and Business Economics, University of Southern Denmark, Degnevej 14, 6705 Esbjerg, Denmark
| | | | - Selma T Karuaihe
- Department of Agricultural Economics, Extension and Rural Development, University of Pretoria, Hatfield, Pretoria 0028, South Africa
| | | | | | - Ahmed S Khan
- Department of Agriculture and Agro-Industry, Agribusiness Division, African Development Bank, Abidjan, Côte d'Ivoire
| | - Patrick Kimani
- Coastal and Marine Resource Development, Bamburi, Mombasa, Kenya
| | | | | | - Dawn Kotowicz
- Coastal Resources Center, Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, USA
| | | | - Lian E Kwong
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.,Department of Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Steven Lade
- Stockholm Resilience Centre, Stockholm University, 10691, Stockholm, Sweden.,Fenner School of Environment and Society, The Australian National University, Canberra, ACT, Australia
| | - Dan Laffoley
- International Union for Conservation of Nature, World Commission on Protected Areas, Gland, Switzerland
| | - Mimi E Lam
- Centre for the Study of the Sciences and the Humanities, University of Bergen, 5007 Bergen, Norway
| | - Vicky W L Lam
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | | | - Mohd T Latif
- Department of Environmental Science and Natural Resources, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Malaysia
| | - Philippe Le Billon
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | | | | | - Simon A Levin
- Department of Ecology and Evolutionary Biology, Princeton University, NJ 08544, USA.,High Meadows Environmental Institute, Princeton University, NJ 08544, USA
| | - Lisa Levin
- Center for Marine Biodiversity and Conservation, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093, USA
| | - Karin E Limburg
- State University of New York College of Environmental Science and Forestry, Syracuse, NY 13210, USA
| | - John List
- The Kenneth C. Griffin Department of Economics, The University of Chicago, Chicago, IL 60637, USA
| | - Amanda T Lombard
- Institute for Coastal and Marine Research, Nelson Mandela University, Gqeberha, South Africa
| | - Priscila F M Lopes
- Department of Ecology, Universidade Federal do Rio Grande do Norte, Brazil
| | - Heike K Lotze
- Department of Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Tabitha G Mallory
- China Ocean Institute, Seattle, WA 98122 USA.,University of Washington, Seattle, WA 98195, USA
| | - Roshni S Mangar
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Daniel Marszalec
- Department of Economics and Business, International Christian University, 3-10-2 Osawa, Mitaka-shi, Tokyo 181-8585, Japan
| | - Precious Mattah
- Centre for Coastal Management, Africa Centre of Excellence in Coastal Resilience, University of Cape Coast, Cape Coast, Ghana
| | - Juan Mayorga
- Environmental Market Solutions Lab, University of California Santa Barbara, Santa Barbara, CA 93106-5131, USA.,National Geographic Society, Pristine Seas, Washington, DC 20036, USA
| | - Carol McAusland
- Department of Food and Resource Economics, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Douglas J McCauley
- Marine Science Institute, University of California Santa Barbara, Santa Barbara, CA 93106, USA
| | - Jeffrey McLean
- Global Health Graduate Programs, McMaster University, Hamilton, ON, Canada
| | - Karly McMullen
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Frank Meere
- Sustainable Fisheries Management, Calwell, ACT 2905, Australia
| | - Annie Mejaes
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Michael Melnychuk
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.,School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98105, USA
| | - Jaime Mendo
- Universidad Nacional Agraria La Molina, Lima, Peru
| | - Fiorenza Micheli
- Hopkins Marine Station, Pacific Grove, CA 93950, USA.,Stanford Center for Ocean Solutions, Pacific Grove, CA 94305, USA
| | - Katherine Millage
- Bren School of Environmental Science and Management, University of California, Santa Barbara, CA 93117, USA
| | | | | | | | - Mazlin Mokhtar
- Institute for Environment and Development, Universiti Kebangsaan Malaysia, Bangi, Malaysia
| | - Lance Morgan
- Marine Conservation Institute, Glen Ellen CA 95442, USA
| | - Umi Muawanah
- The Agency for Research and Human Development on Marine Affairs and Fisheries, Ministry of Marine Affairs and Fisheries, Indonesia
| | - Gordon R Munro
- Vancouver School of Economics, University of British Columbia, Vancouver, BC, Canada
| | - Grant Murray
- Nicholas School of the Environment, Duke University, Beaufort, NC 28516, USA
| | - Saleem Mustafa
- Institute for Environment and Development, Universiti Kebangsaan Malaysia, Bangi, Malaysia
| | | | - Dianne Newell
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Tu Nguyen
- Department of Applied Economics, Oregon State University, Corvallis, OR 97331, USA
| | - Frederik Noack
- Department of Food and Resource Economics, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Adibi M Nor
- International Institute of Public Policy and Management, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Francis K E Nunoo
- Department of Marine and Fisheries Sciences, University of Ghana, Legon, Accra, Ghana
| | - David Obura
- Coastal Oceans Research and Development - Indian Ocean (CORDIO) East Africa, Mombasa 80101, Kenya
| | - Tom Okey
- School of Environmental Studies, University of Victoria, Victoria, BC V8P 5C2, Canada
| | - Isaac Okyere
- Department of Fisheries and Aquatic Sciences, Africa Centre of Excellence in Coastal Resilience, University of Cape Coast, Cape Coast, Ghana
| | - Paul Onyango
- University of Dar es Salaam, Department of Aquatic Sciences and Fisheries, Dar es Salaam, Tanzania
| | - Maartje Oostdijk
- World Maritime University of the International Maritime Organization, a Specialized Agency of the United Nations, Malmö, Sweden
| | - Polina Orlov
- Department of Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Henrik Österblom
- Stockholm Resilience Centre, Stockholm University, 10691, Stockholm, Sweden
| | - Dwight Owens
- Ocean Networks, Canada University of Victoria, Victoria, BC, Canada
| | - Tessa Owens
- School of International and Public Affairs, Columbia University, New York, NY 10027, USA.,The Earth Institute, Columbia University, New York, NY 10025, USA
| | - Mohammed Oyinlola
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Nathan Pacoureau
- Earth to Ocean Research Group, Department of Biological Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - Evgeny Pakhomov
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.,Department of Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | | | | | - Aurélien Paulmier
- Laboratoire d'Etudes en Géophysique et Océanographie Spatiales, Université de Toulouse, Toulouse, France
| | - Daniel Pauly
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Rodrigue Orobiyi Edéya Pèlèbè
- Centre for Coastal Management, Africa Centre of Excellence in Coastal Resilience, University of Cape Coast, Cape Coast, Ghana.,Research Laboratory in Aquaculture and Aquatic Ecotoxicology, Faculty of Agronomy, University of Parakou, Benin
| | | | - Maria G Pennino
- Instituto Español de Oceanografía, Centro Oceanográfico de Vigo, 36390 Vigo, Spain
| | - Garry Peterson
- Stockholm Resilience Centre, Stockholm University, 10691, Stockholm, Sweden
| | - Thuy T T Pham
- The Norwegian College of Fishery Science, The Arctic University of Norway, Langnes, 9037, Tromsø, Norway
| | - Evelyn Pinkerton
- School of Resource and Environmental Management, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - Stephen Polasky
- Department of Applied Economics, University of Minnesota, St. Paul, MN 55108, USA
| | - Nicholas V C Polunin
- School of Natural and Environmental Sciences, Newcastle University, Newcastle-upon-Tyne, UK
| | - Ekow Prah
- Centre for Coastal Management, Africa Centre of Excellence in Coastal Resilience, University of Cape Coast, Cape Coast, Ghana
| | - Jorge Ramírez
- Charles Darwin Foundation, Puerto Ayora, Galápagos, Ecuador
| | - Veronica Relano
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Gabriel Reygondeau
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Don Robadue
- Coastal Resources Center, Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, USA
| | - Callum Roberts
- Centre for Ecology and Conservation, University of Exeter, Penryn, Cornwall, UK
| | | | - Katina Roumbedakis
- Cross-Research in Environmental Technologies, Department of Applied Economics, University of Santiago de Compostela, Santiago de Compostela, 15782, Spain
| | - Enric Sala
- National Geographic, Pristine Seas, Washington, DC 20036, USA
| | | | - Kathleen Segerson
- Department of Economics, University of Connecticut, Storrs, CT 06269, USA
| | - Juan Carlos Seijo
- School of Natural Resources, Universidad Marista de Mérida, Mérida, Yucatán, México
| | - Karen C Seto
- School of the Environment, Yale University, New Haven, CT 06511, USA
| | - Jason F Shogren
- Department of Economics, University of Wyoming, Laramie, WY 82071, USA
| | | | - Gerald Singh
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.,Department of Geography, Memorial University of Newfoundland, St. John's, NL A1B 3X5, Canada
| | - Ambre Soszynski
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Dacotah-Victoria Splichalova
- Institute for Resources, Environment, and Sustainability, The University of British Columbia, Vancouver, BC, Canada
| | | | - Jesper Stage
- Department of Social Sciences, Technology and Arts, Luleå University of Technology, 971 87 Luleå, Sweden
| | - Fabrice Stephenson
- National Institute of Water and Atmospheric Research, Hamilton, New Zealand
| | - Bryce D Stewart
- Department of Environment and Geography, University of York, York, YO10 5NG, UK
| | - Riad Sultan
- Department of Economics and Statistics, University of Mauritius, Reduit, Mauritius
| | - Curtis Suttle
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.,Department of Botany, University of British Columbia, Vancouver, BC, Canada
| | | | - Amadou Tall
- The Economic Community of West African States (ECOWAS), Wuse, Abuja, Nigeria
| | - Nicolás Talloni-Álvarez
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Alessandro Tavoni
- Department of Economics, Universita di Bologna, 40126 Bologna, Italy.,Grantham Research Institute on Climate Change and the Environment, London School of Economics, London WC2A 2AE, UK
| | - D R Fraser Taylor
- Geomatics and Cartographic Research Centre, Carleton University, Ottawa, ON, Canada
| | - Louise S L Teh
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Lydia C L Teh
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Jean-Baptiste Thiebot
- National Institute of Polar Research, 10-3, Midori-cho, Tachikawa, Tokyo 190-8518, Japan
| | - Torsten Thiele
- Institute for Advanced Sustainability Studies, Potsdam, Germany
| | | | - Romola V Thumbadoo
- Geography and Environmental Studies, Carleton University, Ottawa, ON K1S 5B6, Canada
| | | | - Richard S J Tol
- Department of Economics, University of Sussex, Falmer, Brighton, BN1 9SL, UK.,Institute for Environmental Studies and Department of Spatial Economics, Vrije Universiteit, Amsterdam, Netherlands
| | - Philippe Tortell
- Department of Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Max Troell
- The Beijer Institute of Ecological Economics, The Royal Swedish Academy of Sciences, 10405, Stockholm, Sweden
| | - M Selçuk Uzmanoğlu
- Department of Fisheries, Institute of Pure and Applied Sciences, Marmara University, İstanbul, Turkey
| | - Ingrid van Putten
- Commonwealth Scientific and Industrial Research Organisation, Oceans and Atmosphere, Hobart, Tasmania, Australia.,Centre for Marine Socioecology, University of Tasmania, Hobart, Tasmania, Australia
| | | | | | - Colette C C Wabnitz
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.,Stanford Center for Ocean Solutions, Stanford University, Stanford, CA 94305, USA
| | - Melissa Walsh
- Marine Conservation Finance Consulting and Ocean Finance Initiative, Asian Development Bank, Metro Manila, Philippines
| | - J P Walsh
- Graduate School of Oceanography, The University of Rhode Island, Bay Campus, Narragansett, RI 02882, USA
| | - Nina Wambiji
- Kenya Marine and Fisheries Research Institute, Mombasa, Kenya
| | - Elke U Weber
- Andlinger Center for Energy and Environment, Princeton University, Princeton, NJ 08540, USA
| | | | | | - Mary S Wisz
- World Maritime University of the International Maritime Organization, a Specialized Agency of the United Nations, Malmö, Sweden
| | - Boris Worm
- Department of Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Lan Xiao
- Hokkaido University, Institute for the Advancement of Higher Education, Hokkaido, Japan
| | - Nobuyuki Yagi
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi Bunkyo-ku Tokyo, Japan
| | - Satoshi Yamazaki
- Tasmanian School of Business and Economics, University of Tasmania, Sandy Bay, TAS 7005, Australia
| | - Hong Yang
- Department of Geography and Environmental Science, University of Reading, UK, RG6 6AB, UK
| | - Dirk Zeller
- School of Biological Sciences & Oceans Institute, University of Western Australia, Crawley, WA 6009, Australia
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5
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Tittensor DP, Novaglio C, Harrison CS, Heneghan RF, Barrier N, Bianchi D, Bopp L, Bryndum-Buchholz A, Britten GL, Büchner M, Cheung WWL, Christensen V, Coll M, Dunne JP, Eddy TD, Everett JD, Fernandes-Salvador JA, Fulton EA, Galbraith ED, Gascuel D, Guiet J, John JG, Link JS, Lotze HK, Maury O, Ortega-Cisneros K, Palacios-Abrantes J, Petrik CM, du Pontavice H, Rault J, Richardson AJ, Shannon L, Shin YJ, Steenbeek J, Stock CA, Blanchard JL. Next-generation ensemble projections reveal higher climate risks for marine ecosystems. Nat Clim Chang 2021; 11:973-981. [PMID: 34745348 PMCID: PMC8556156 DOI: 10.1038/s41558-021-01173-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 09/01/2021] [Indexed: 05/16/2023]
Abstract
Projections of climate change impacts on marine ecosystems have revealed long-term declines in global marine animal biomass and unevenly distributed impacts on fisheries. Here we apply an enhanced suite of global marine ecosystem models from the Fisheries and Marine Ecosystem Model Intercomparison Project (Fish-MIP), forced by new-generation Earth system model outputs from Phase 6 of the Coupled Model Intercomparison Project (CMIP6), to provide insights into how projected climate change will affect future ocean ecosystems. Compared with the previous generation CMIP5-forced Fish-MIP ensemble, the new ensemble ecosystem simulations show a greater decline in mean global ocean animal biomass under both strong-mitigation and high-emissions scenarios due to elevated warming, despite greater uncertainty in net primary production in the high-emissions scenario. Regional shifts in the direction of biomass changes highlight the continued and urgent need to reduce uncertainty in the projected responses of marine ecosystems to climate change to help support adaptation planning.
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Affiliation(s)
- Derek P. Tittensor
- Department of Biology, Dalhousie University, Halifax, Nova Scotia Canada
- United Nations Environment Programme World Conservation Monitoring Centre, Cambridge, UK
| | - Camilla Novaglio
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania Australia
- Center for Marine Socio-ecology, University of Tasmania, Hobart, Tasmania Australia
| | - Cheryl S. Harrison
- School of Earth, Environmental and Marine Science, University of Texas Rio Grande Valley, Port Isabel, TX USA
- Department of Ocean and Coastal Science and Centre for Computation and Technology, Louisiana State University, Baton Rouge, LA USA
| | - Ryan F. Heneghan
- School of Mathematical Sciences, Queensland University of Technology, Brisbane, Queensland Australia
| | - Nicolas Barrier
- MARBEC, IRD, Univ Montpellier, Ifremer, CNRS, Sète/Montpellier, France
| | - Daniele Bianchi
- Department of Atmospheric and Oceanic Sciences, University of California Los Angeles, Los Angeles, CA USA
| | - Laurent Bopp
- LMD/IPSL, CNRS, Ecole Normale Supérieure, Université PSL, Sorbonne Université, Ecole Polytechnique, Paris, France
| | | | - Gregory L. Britten
- Program in Atmospheres, Oceans, and Climate, Massachusetts Institute of Technology, Cambridge, MA USA
| | - Matthias Büchner
- Potsdam-Institute for Climate Impact Research (PIK), Potsdam, Germany
| | - William W. L. Cheung
- Institute for the Oceans and Fisheries, The University of British Columbia, Vancouver, British Columbia Canada
| | - Villy Christensen
- Institute for the Oceans and Fisheries, The University of British Columbia, Vancouver, British Columbia Canada
| | - Marta Coll
- Institute of Marine Science (ICM-CSIC), Barcelona, Spain
- Ecopath International Initiative Research Association, Barcelona, Spain
| | - John P. Dunne
- NOAA/OAR Geophysical Fluid Dynamics Laboratory, Princeton, NJ USA
| | - Tyler D. Eddy
- Centre for Fisheries Ecosystems Research, Fisheries and Marine Institute, Memorial University of Newfoundland, St. John’s, Newfoundland and Labrador Canada
| | - Jason D. Everett
- School of Mathematics and Physics, The University of Queensland, St. Lucia, Queensland Australia
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Oceans and Atmosphere, Queensland Biosciences Precinct, St Lucia, Brisbane, Queensland Australia
- Centre for Marine Science and Innovation, The University of New South Wales, Sydney, New South Wales Australia
| | | | - Elizabeth A. Fulton
- Center for Marine Socio-ecology, University of Tasmania, Hobart, Tasmania Australia
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Oceans and Atmosphere, Hobart, Tasmania Australia
| | - Eric D. Galbraith
- Department of Earth and Planetary Science, McGill University, Montreal, Quebec Canada
| | - Didier Gascuel
- UMR Ecology and Ecosystems Health (ESE), Institut Agro, Inrae, Rennes, France
| | - Jerome Guiet
- Department of Atmospheric and Oceanic Sciences, University of California Los Angeles, Los Angeles, CA USA
| | - Jasmin G. John
- NOAA/OAR Geophysical Fluid Dynamics Laboratory, Princeton, NJ USA
| | | | - Heike K. Lotze
- Department of Biology, Dalhousie University, Halifax, Nova Scotia Canada
| | - Olivier Maury
- MARBEC, IRD, Univ Montpellier, Ifremer, CNRS, Sète/Montpellier, France
| | | | - Juliano Palacios-Abrantes
- Institute for the Oceans and Fisheries, The University of British Columbia, Vancouver, British Columbia Canada
- Center for Limnology, University of Wisconsin, Madison, WI USA
| | - Colleen M. Petrik
- Department of Oceanography, Texas A&M University, College Station, TX USA
| | - Hubert du Pontavice
- UMR Ecology and Ecosystems Health (ESE), Institut Agro, Inrae, Rennes, France
- Atmospheric and Oceanic Sciences Program, Princeton University, Princeton, NJ USA
| | - Jonathan Rault
- MARBEC, IRD, Univ Montpellier, Ifremer, CNRS, Sète/Montpellier, France
| | - Anthony J. Richardson
- School of Mathematics and Physics, The University of Queensland, St. Lucia, Queensland Australia
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Oceans and Atmosphere, Queensland Biosciences Precinct, St Lucia, Brisbane, Queensland Australia
| | - Lynne Shannon
- Department of Biological Sciences, University of Cape Town, Cape Town, South Africa
| | - Yunne-Jai Shin
- MARBEC, IRD, Univ Montpellier, Ifremer, CNRS, Sète/Montpellier, France
| | - Jeroen Steenbeek
- Ecopath International Initiative Research Association, Barcelona, Spain
| | - Charles A. Stock
- NOAA/OAR Geophysical Fluid Dynamics Laboratory, Princeton, NJ USA
| | - Julia L. Blanchard
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania Australia
- Center for Marine Socio-ecology, University of Tasmania, Hobart, Tasmania Australia
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6
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Murphy GE, Dunic JC, Adamczyk EM, Bittick SJ, Côté IM, Cristiani J, Geissinger EA, Gregory RS, Lotze HK, O’Connor MI, Araújo CA, Rubidge EM, Templeman ND, Wong MC. From coast to coast to coast: ecology and management of seagrass ecosystems across Canada. Facets (Ott) 2021. [DOI: 10.1139/facets-2020-0020] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Seagrass meadows are among the most productive and diverse marine ecosystems, providing essential structure, functions, and services. They are also among the most impacted by human activities and in urgent need of better management and protection. In Canada, eelgrass ( Zostera marina) meadows are found along the Atlantic, Pacific, and Arctic coasts, and thus occur across a wide range of biogeographic conditions. Here, we synthesize knowledge of eelgrass ecosystems across Canada’s coasts, highlighting commonalities and differences in environmental conditions, plant, habitat, and community structure, as well as current trends and human impacts. Across regions, eelgrass life history, phenology, and general species assemblages are similar. However, distinct regional differences occur in environmental conditions, particularly with water temperature and nutrient availability. There is considerable variation in the types and strengths of human activities among regions. The impacts of coastal development are prevalent in all regions, while other impacts are of concern for specific regions, e.g., nutrient loading in the Atlantic and impacts from the logging industry in the Pacific. In addition, climate change represents a growing threat to eelgrass meadows. We review current management and conservation efforts and discuss the implications of observed differences from coast to coast to coast.
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Affiliation(s)
- Grace E.P. Murphy
- Department of Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada
- Bedford Institute of Oceanography, Fisheries and Oceans Canada, 1 Challenger Drive, Dartmouth, NS B2Y 4A2, Canada
| | - Jillian C. Dunic
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - Emily M. Adamczyk
- Department of Zoology, Biodiversity Research Centre, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Sarah J. Bittick
- Department of Zoology, Biodiversity Research Centre, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Isabelle M. Côté
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - John Cristiani
- Department of Zoology, Biodiversity Research Centre, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | | | - Robert S. Gregory
- Department of Biology, Memorial University, St. John’s, NL A1C 5S7, Canada
- Fisheries and Oceans Canada, St. John’s, NL A1A 5J7, Canada
| | - Heike K. Lotze
- Department of Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Mary I. O’Connor
- Department of Zoology, Biodiversity Research Centre, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Carlos A.S. Araújo
- Département de Biologie, Chimie et Géographie, Université du Québec à Rimouski, Rimouski, QC G5L 3A1, Canada
| | - Emily M. Rubidge
- Institute of Ocean Sciences, Fisheries and Oceans Canada, Sidney, BC V8L 4B2, Canada
- Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | | | - Melisa C. Wong
- Bedford Institute of Oceanography, Fisheries and Oceans Canada, 1 Challenger Drive, Dartmouth, NS B2Y 4A2, Canada
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7
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Wilson KL, Tittensor DP, Worm B, Lotze HK. Incorporating climate change adaptation into marine protected area planning. Glob Chang Biol 2020; 26:3251-3267. [PMID: 32222010 DOI: 10.1111/gcb.15094] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 02/04/2020] [Accepted: 02/24/2020] [Indexed: 05/20/2023]
Abstract
Climate change is increasingly impacting marine protected areas (MPAs) and MPA networks, yet adaptation strategies are rarely incorporated into MPA design and management plans according to the primary scientific literature. Here we review the state of knowledge for adapting existing and future MPAs to climate change and synthesize case studies (n = 27) of how marine conservation planning can respond to shifting environmental conditions. First, we derive a generalized conservation planning framework based on five published frameworks that incorporate climate change adaptation to inform MPA design. We then summarize examples from the scientific literature to assess how conservation goals were defined, vulnerability assessments performed and adaptation strategies incorporated into the design and management of existing or new MPAs. Our analysis revealed that 82% of real-world examples of climate change adaptation in MPA planning derive from tropical reefs, highlighting the need for research in other ecosystems and habitat types. We found contrasting recommendations for adaptation strategies at the planning stage, either focusing only on climate refugia, or aiming for representative protection of areas encompassing the full range of expected climate change impacts. Recommendations for MPA management were more unified and focused on adaptative management approaches. Lastly, we evaluate common barriers to adopting climate change adaptation strategies based on reviewing studies which conducted interviews with MPA managers and other conservation practitioners. This highlights a lack of scientific studies evaluating different adaptation strategies and shortcomings in current governance structures as two major barriers, and we discuss how these could be overcome. Our review provides a comprehensive synthesis of planning frameworks, case studies, adaptation strategies and management actions which can inform a more coordinated global effort to adapt existing and future MPA networks to continued climate change.
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Affiliation(s)
- Kristen L Wilson
- Department of Biology, Dalhousie University, Halifax, NS, Canada
| | - Derek P Tittensor
- Department of Biology, Dalhousie University, Halifax, NS, Canada
- UN Environment World Conservation Monitoring Centre, Cambridge, UK
| | - Boris Worm
- Department of Biology, Dalhousie University, Halifax, NS, Canada
| | - Heike K Lotze
- Department of Biology, Dalhousie University, Halifax, NS, Canada
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8
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Duarte CM, Agusti S, Barbier E, Britten GL, Castilla JC, Gattuso JP, Fulweiler RW, Hughes TP, Knowlton N, Lovelock CE, Lotze HK, Predragovic M, Poloczanska E, Roberts C, Worm B. Rebuilding marine life. Nature 2020; 580:39-51. [DOI: 10.1038/s41586-020-2146-7] [Citation(s) in RCA: 332] [Impact Index Per Article: 83.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 02/18/2020] [Indexed: 11/09/2022]
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9
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Bryndum-Buchholz A, Prentice F, Tittensor DP, Blanchard JL, Cheung WW, Christensen V, Galbraith ED, Maury O, Lotze HK. Differing marine animal biomass shifts under 21st century climate change between Canada’s three oceans. Facets (Ott) 2020. [DOI: 10.1139/facets-2019-0035] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Under climate change, species composition and abundances in high-latitude waters are expected to substantially reconfigure with consequences for trophic relationships and ecosystem services. Outcomes are challenging to project at national scales, despite their importance for management decisions. Using an ensemble of six global marine ecosystem models we analyzed marine ecosystem responses to climate change from 1971 to 2099 in Canada’s Exclusive Economic Zone (EEZ) under four standardized emissions scenarios. By 2099, under business-as-usual emissions (RCP8.5) projected marine animal biomass declined by an average of −7.7% (±29.5%) within the Canadian EEZ, dominated by declines in the Pacific (−24% ± 24.5%) and Atlantic (−25.5% ± 9.5%) areas; these were partially compensated by increases in the Canadian Arctic (+26.2% ± 38.4%). Lower emissions scenarios projected successively smaller biomass changes, highlighting the benefits of stronger mitigation targets. Individual model projections were most consistent in the Atlantic and Pacific, but highly variable in the Arctic due to model uncertainties in polar regions. Different trajectories of future marine biomass changes will require regional-specific responses in conservation and management strategies, such as adaptive planning of marine protected areas and species-specific management plans, to enhance resilience and rebuilding of Canada’s marine ecosystems and commercial fish stocks.
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Affiliation(s)
- Andrea Bryndum-Buchholz
- Department of Biology, Dalhousie University, 1355 Oxford Street, Halifax, NS B3H 4R2, Canada
| | - Faelan Prentice
- Department of Biology, Dalhousie University, 1355 Oxford Street, Halifax, NS B3H 4R2, Canada
| | - Derek P. Tittensor
- Department of Biology, Dalhousie University, 1355 Oxford Street, Halifax, NS B3H 4R2, Canada
| | - Julia L. Blanchard
- Institute for Marine and Antarctic Studies and Center for Marine Socioecology, University of Tasmania, 20 Castray Esplanade, Battery Point TAS 7004, Private Bag 129, Hobart, Tasmania 7001, Australia
| | - William W.L. Cheung
- Nippon Foundation-UBC Nereus Program and Changing Ocean Research Unit, Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Villy Christensen
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Eric D. Galbraith
- Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Spain
- Department of Mathematics, Institut de Ciència i Tecnologia Ambientals (ICTA), Universitat Autonoma de Barcelona, 08193 Barcelona, Spain
| | - Olivier Maury
- Institut de Recherche pour le Développement (IRD), MARBEC (IRD, University of Montpellier, IFREMER, CNRS), 34203 Sète, France
- Department of Oceanography, Marine Research Institute, University of Cape Town, 7701 Rondebosch, South Africa
| | - Heike K. Lotze
- Department of Biology, Dalhousie University, 1355 Oxford Street, Halifax, NS B3H 4R2, Canada
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10
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Tittensor DP, Beger M, Boerder K, Boyce DG, Cavanagh RD, Cosandey-Godin A, Crespo GO, Dunn DC, Ghiffary W, Grant SM, Hannah L, Halpin PN, Harfoot M, Heaslip SG, Jeffery NW, Kingston N, Lotze HK, McGowan J, McLeod E, McOwen CJ, O’Leary BC, Schiller L, Stanley RRE, Westhead M, Wilson KL, Worm B. Integrating climate adaptation and biodiversity conservation in the global ocean. Sci Adv 2019; 5:eaay9969. [PMID: 31807711 PMCID: PMC6881166 DOI: 10.1126/sciadv.aay9969] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Accepted: 11/01/2019] [Indexed: 05/18/2023]
Abstract
The impacts of climate change and the socioecological challenges they present are ubiquitous and increasingly severe. Practical efforts to operationalize climate-responsive design and management in the global network of marine protected areas (MPAs) are required to ensure long-term effectiveness for safeguarding marine biodiversity and ecosystem services. Here, we review progress in integrating climate change adaptation into MPA design and management and provide eight recommendations to expedite this process. Climate-smart management objectives should become the default for all protected areas, and made into an explicit international policy target. Furthermore, incentives to use more dynamic management tools would increase the climate change responsiveness of the MPA network as a whole. Given ongoing negotiations on international conservation targets, now is the ideal time to proactively reform management of the global seascape for the dynamic climate-biodiversity reality.
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Affiliation(s)
- Derek P. Tittensor
- Department of Biology, Dalhousie University, Halifax, NS, Canada
- UN Environment Programme World Conservation Monitoring Centre, Cambridge, UK
- Corresponding author.
| | - Maria Beger
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
- Centre for Biodiversity and Conservation Science, School of Biological Sciences, University of Queensland, Brisbane, Australia
| | - Kristina Boerder
- Department of Biology, Dalhousie University, Halifax, NS, Canada
| | - Daniel G. Boyce
- Department of Biology, Dalhousie University, Halifax, NS, Canada
| | | | | | - Guillermo Ortuño Crespo
- Marine Geospatial Ecology Lab, Nicholas School of the Environment, Duke University, Durham, NC, USA
| | - Daniel C. Dunn
- Marine Geospatial Ecology Lab, Nicholas School of the Environment, Duke University, Durham, NC, USA
- School of Earth and Environmental Sciences, University of Queensland, Brisbane, Australia
| | | | | | - Lee Hannah
- The Moore Center for Science, Conservation International, Arlington, VA, USA
| | - Patrick N. Halpin
- Marine Geospatial Ecology Lab, Nicholas School of the Environment, Duke University, Durham, NC, USA
| | - Mike Harfoot
- UN Environment Programme World Conservation Monitoring Centre, Cambridge, UK
| | - Susan G. Heaslip
- Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, NS, Canada
| | - Nicholas W. Jeffery
- Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, NS, Canada
| | - Naomi Kingston
- UN Environment Programme World Conservation Monitoring Centre, Cambridge, UK
| | - Heike K. Lotze
- Department of Biology, Dalhousie University, Halifax, NS, Canada
| | | | | | - Chris J. McOwen
- UN Environment Programme World Conservation Monitoring Centre, Cambridge, UK
| | - Bethan C. O’Leary
- School of Environment and Life Sciences, University of Salford, Manchester, UK
- Department of Environment and Geography, University of York, York, UK
| | - Laurenne Schiller
- Marine Affairs Program, Dalhousie University, Halifax, NS, Canada
- Ocean Wise, Vancouver, BC, Canada
| | - Ryan R. E. Stanley
- Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, NS, Canada
| | - Maxine Westhead
- Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, NS, Canada
| | | | - Boris Worm
- Department of Biology, Dalhousie University, Halifax, NS, Canada
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11
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Abstract
Coastal biogenic habitats are vulnerable to human impacts from both terrestrial and marine realms. Yet the broad spatial scale used in current approaches of quantifying anthropogenic stressors is not relevant to the finer scales affecting most coastal habitats. We developed a standardized human impact metric that includes five bay-scale and four local-scale (0–1 km) terrestrial and marine-based impacts to quantify the magnitude of anthropogenic impacts to coastal bays and nearshore biogenic habitats. We applied this metric to 180 seagrass beds ( Zostera marina), an important biogenic habitat prioritized for marine protection, in 52 bays across Atlantic Canada. The results show that seagrass beds and coastal bays exist across a wide human impact gradient and provide insight into which are the most and least affected by human threats. Generally, land alteration, nutrient loading, and shellfish aquaculture were higher in the Gulf of St. Lawrence, whereas invasive species and fishing activities were higher along the Atlantic coast. Sixty-four percent of bays were at risk of seagrass decline from nitrogen loading. We also found high within-bay variation in impact intensity, emphasizing the necessity of quantifying impacts at multiple spatial scales. We discuss implications for management and conservation planning, and application to other coastal habitats in Canada and beyond.
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Affiliation(s)
- Grace E.P. Murphy
- Department of Biology, Dalhousie University, 1355 Oxford Street, P.O. Box 15000, Halifax, NS B3H 4R2, Canada
| | - Melisa C. Wong
- Fisheries and Oceans Canada, Bedford Institute of Oceanography, 1 Challenger Drive, Dartmouth, NS B2Y 4A2, Canada
| | - Heike K. Lotze
- Department of Biology, Dalhousie University, 1355 Oxford Street, P.O. Box 15000, Halifax, NS B3H 4R2, Canada
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12
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Schewe J, Gosling SN, Reyer C, Zhao F, Ciais P, Elliott J, Francois L, Huber V, Lotze HK, Seneviratne SI, van Vliet MTH, Vautard R, Wada Y, Breuer L, Büchner M, Carozza DA, Chang J, Coll M, Deryng D, de Wit A, Eddy TD, Folberth C, Frieler K, Friend AD, Gerten D, Gudmundsson L, Hanasaki N, Ito A, Khabarov N, Kim H, Lawrence P, Morfopoulos C, Müller C, Müller Schmied H, Orth R, Ostberg S, Pokhrel Y, Pugh TAM, Sakurai G, Satoh Y, Schmid E, Stacke T, Steenbeek J, Steinkamp J, Tang Q, Tian H, Tittensor DP, Volkholz J, Wang X, Warszawski L. State-of-the-art global models underestimate impacts from climate extremes. Nat Commun 2019; 10:1005. [PMID: 30824763 PMCID: PMC6397256 DOI: 10.1038/s41467-019-08745-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 01/28/2019] [Indexed: 12/05/2022] Open
Abstract
Global impact models represent process-level understanding of how natural and human systems may be affected by climate change. Their projections are used in integrated assessments of climate change. Here we test, for the first time, systematically across many important systems, how well such impact models capture the impacts of extreme climate conditions. Using the 2003 European heat wave and drought as a historical analogue for comparable events in the future, we find that a majority of models underestimate the extremeness of impacts in important sectors such as agriculture, terrestrial ecosystems, and heat-related human mortality, while impacts on water resources and hydropower are overestimated in some river basins; and the spread across models is often large. This has important implications for economic assessments of climate change impacts that rely on these models. It also means that societal risks from future extreme events may be greater than previously thought.
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Affiliation(s)
- Jacob Schewe
- Potsdam Institute for Climate Impact Research, Member of the Leibniz Association, 14473, Potsdam, Germany.
| | - Simon N Gosling
- School of Geography, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Christopher Reyer
- Potsdam Institute for Climate Impact Research, Member of the Leibniz Association, 14473, Potsdam, Germany
| | - Fang Zhao
- School of Geographic Sciences, East China Normal University, Shanghai, 200241, China
| | - Philippe Ciais
- Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ, 91191, Gif-sur-Yvette, France
| | - Joshua Elliott
- University of Chicago and ANL Computation Institute, 5735S. Ellis Ave, Chicago, IL, 60637, USA
| | - Louis Francois
- Institut d'Astrophysique et de Géophysique/U.R. SPHERES, Université de Liège, B-4000, LIEGE, Belgium
| | - Veronika Huber
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Ctra. de Utrera 1, 41013, Sevilla, Spain
| | - Heike K Lotze
- Department of Biology, Dalhousie University, Halifax, NS, B3H 4R2, Canada
| | - Sonia I Seneviratne
- ETH Zurich, Land-Climate Dynamics, Institute for Atmospheric and Climate Science, 8092, Zurich, Switzerland
| | - Michelle T H van Vliet
- Water Systems and Global Change group, Wageningen University, PO Box 47, 6700 AA, Wageningen, The Netherlands
| | - Robert Vautard
- Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ, 91191, Gif-sur-Yvette, France
| | - Yoshihide Wada
- International Institute for Applied Systems Analysis, Schlossplatz 1, A-2361, Laxenburg, Austria
| | - Lutz Breuer
- Institute for Landscape Ecology and Resources Management (ILR), Research Centre for BioSystems, Land Use and Nutrition (iFZ), Justus Liebig University Giessen, Heinrich-Buff-Ring 26, 35390, Giessen, Germany
- Centre for International Development and Environmental Research (ZEU), Justus Liebig University Giessen, Senckenbergstraße 3, 35392, Giessen, Germany
| | - Matthias Büchner
- Potsdam Institute for Climate Impact Research, Member of the Leibniz Association, 14473, Potsdam, Germany
| | - David A Carozza
- Department of Earth and Planetary Sciences, McGill University, Montreal, H3A 0E8, Canada
- Department of Mathematics, Université du Québec à Montréal, Montreal, H2X 3Y7, Canada
| | - Jinfeng Chang
- Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ, 91191, Gif-sur-Yvette, France
| | - Marta Coll
- Institute of Marine Sciences (ICM - CSIC), Barcelona, E-08003, Spain
| | - Delphine Deryng
- Leibniz Centre for Agricultural Landscape Research (ZALF), Müncheberg, 15374, Germany
- IRI THEsys, Humboldt University of Berlin, 10117, Berlin, Germany
| | - Allard de Wit
- Wageningen Environmental Research, 6700 AA, Wageningen, The Netherlands
| | - Tyler D Eddy
- Department of Biology, Dalhousie University, Halifax, NS, B3H 4R2, Canada
- Nereus Program, Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, V6T 1Z4, BC, Canada
- Nereus Program, Institute for Marine & Coastal Sciences, School of the Earth, Ocean, and Environment, University of South Carolina, Columbia, 29208, SC, USA
| | - Christian Folberth
- International Institute for Applied Systems Analysis, Schlossplatz 1, A-2361, Laxenburg, Austria
| | - Katja Frieler
- Potsdam Institute for Climate Impact Research, Member of the Leibniz Association, 14473, Potsdam, Germany
| | - Andrew D Friend
- Department of Geography, University of Cambridge, Cambridge, CB2 3EN, UK
| | - Dieter Gerten
- Potsdam Institute for Climate Impact Research, Member of the Leibniz Association, 14473, Potsdam, Germany
- Geography Department, Humboldt-Universität zu Berlin, 10099, Berlin, Germany
| | - Lukas Gudmundsson
- ETH Zurich, Land-Climate Dynamics, Institute for Atmospheric and Climate Science, 8092, Zurich, Switzerland
| | - Naota Hanasaki
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Akihiko Ito
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Nikolay Khabarov
- International Institute for Applied Systems Analysis, Schlossplatz 1, A-2361, Laxenburg, Austria
| | - Hyungjun Kim
- Institute of Industrial Science, the University of Tokyo, Tokyo, 153-8505, Japan
| | - Peter Lawrence
- Terrestrial Science Section, National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO, 80305, USA
| | - Catherine Morfopoulos
- Imperial College of London, Department of Life Science, Silwood Park Campus Buckhurst Rd, Berks, SL5 7PY, UK
| | - Christoph Müller
- Potsdam Institute for Climate Impact Research, Member of the Leibniz Association, 14473, Potsdam, Germany
| | - Hannes Müller Schmied
- Institute of Physical Geography, Goethe-University Frankfurt, Altenhöferallee 1, 60438, Frankfurt am Main, Germany
- Senckenberg Biodiversity and Climate Research Centre (SBiK-F), Senckenberganlage 25, 60325, Frankfurt, Germany
| | - René Orth
- Department of Physical Geography, Bolin Centre for Climate Research, Stockholm University, SE-10691, Stockholm, Sweden
- Department of Biogeochemical Integration, Max Planck Institute for Biogeochemistry, D-07745, Jena, Germany
| | - Sebastian Ostberg
- Potsdam Institute for Climate Impact Research, Member of the Leibniz Association, 14473, Potsdam, Germany
| | - Yadu Pokhrel
- Department of Civil and Environmental Engineering, Michigan State University, MI, 48824, USA
| | - Thomas A M Pugh
- School of Geography, Earth & Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, UK
- Birmingham Institute of Forest Research, University of Birmingham, Birmingham, B15 2TT, UK
| | - Gen Sakurai
- Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization, 3-1-3 Kannondai, Tsukuba, Ibaraki, 305-8604, Japan
| | - Yusuke Satoh
- Water Systems and Global Change group, Wageningen University, PO Box 47, 6700 AA, Wageningen, The Netherlands
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Erwin Schmid
- University of Natural Resources and Life Sciences, Vienna, Feistmantelstrasse 4, 1180, Vienna, Austria
| | - Tobias Stacke
- Max Planck Institute for Meteorology, 20146, Hamburg, Germany
| | | | - Jörg Steinkamp
- Senckenberg Biodiversity and Climate Research Centre (SBiK-F), Senckenberganlage 25, 60325, Frankfurt, Germany
- Johannes Gutenberg-University, Anselm-Franz-von-Bentzel-Weg 12, 55128, Mainz, Germany
| | - Qiuhong Tang
- Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 100101, Beijing, China
| | - Hanqin Tian
- School of Forestry and Wildlife Sciences, Auburn University, 602 Duncan Drive, Auburn, AL, 36849, USA
| | - Derek P Tittensor
- Department of Biology, Dalhousie University, Halifax, NS, B3H 4R2, Canada
- UN Environment Programme World Conservation Monitoring Centre, 219 Huntingdon Road, Cambridge, CB3 0DP, UK
| | - Jan Volkholz
- Potsdam Institute for Climate Impact Research, Member of the Leibniz Association, 14473, Potsdam, Germany
| | - Xuhui Wang
- Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ, 91191, Gif-sur-Yvette, France
- Sino-French Institute of Earth System Sciences, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China
- Laboratoire de Météorologie Dynamique, Université Pierre et Marie Curie, Paris, 75005, France
| | - Lila Warszawski
- Potsdam Institute for Climate Impact Research, Member of the Leibniz Association, 14473, Potsdam, Germany
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13
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McIver R, Cullain N, Schmidt AL, Lotze HK. Linking eutrophication indicators in eelgrass habitats to nitrogen loading and mitigating site characteristics in eastern New Brunswick, Canada. Mar Environ Res 2019; 144:141-153. [PMID: 30665766 DOI: 10.1016/j.marenvres.2018.11.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 11/10/2018] [Accepted: 11/18/2018] [Indexed: 06/09/2023]
Abstract
Nitrogen loading has been linked to eutrophication and seagrass bed declines worldwide, yet early warning signs and potential mitigating factors are often less clear. Our objective was to use published nitrogen loading model results together with eelgrass habitat surveys from 7 bays in Atlantic Canada to assess linkages between nitrogen loading, tidal flushing and bivalve aquaculture on observed eutrophication indicators in eelgrass habitats. Field surveys revealed significant differences in primary indicators (annual algae, tissue nitrogen) and secondary changes in eelgrass bed structure, yet no large loss of eelgrass cover or biomass. Multivariate analyses found positive correlations between nitrogen loading and eutrophication indicators, with distinct clusters of high- and low-impact sites, and the mitigating effects of flushing time and aquaculture. Our results highlight that combining measures of nitrogen loading, eutrophication indicators and mitigating factors can help detect early warning signs and assess eutrophication risk to inform management and conservation of coastal ecosystems before significant losses of seagrass occurs.
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Affiliation(s)
- R McIver
- Department of Biology, Dalhousie University, 1355 Oxford Street, P.O. Box 15000, Halifax, Nova Scotia, B3H 4R2, Canada.
| | - N Cullain
- Department of Biology, Dalhousie University, 1355 Oxford Street, P.O. Box 15000, Halifax, Nova Scotia, B3H 4R2, Canada; Marine Action Research, Zavora Marine Lab, Break Beach Road, Zavora, Mozambique
| | - A L Schmidt
- Department of Biology, Dalhousie University, 1355 Oxford Street, P.O. Box 15000, Halifax, Nova Scotia, B3H 4R2, Canada
| | - H K Lotze
- Department of Biology, Dalhousie University, 1355 Oxford Street, P.O. Box 15000, Halifax, Nova Scotia, B3H 4R2, Canada
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14
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Bryndum-Buchholz A, Tittensor DP, Blanchard JL, Cheung WWL, Coll M, Galbraith ED, Jennings S, Maury O, Lotze HK. Twenty-first-century climate change impacts on marine animal biomass and ecosystem structure across ocean basins. Glob Chang Biol 2019; 25:459-472. [PMID: 30408274 DOI: 10.1111/gcb.14512] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 10/01/2018] [Accepted: 10/16/2018] [Indexed: 05/06/2023]
Abstract
Climate change effects on marine ecosystems include impacts on primary production, ocean temperature, species distributions, and abundance at local to global scales. These changes will significantly alter marine ecosystem structure and function with associated socio-economic impacts on ecosystem services, marine fisheries, and fishery-dependent societies. Yet how these changes may play out among ocean basins over the 21st century remains unclear, with most projections coming from single ecosystem models that do not adequately capture the range of model uncertainty. We address this by using six marine ecosystem models within the Fisheries and Marine Ecosystem Model Intercomparison Project (Fish-MIP) to analyze responses of marine animal biomass in all major ocean basins to contrasting climate change scenarios. Under a high emissions scenario (RCP8.5), total marine animal biomass declined by an ensemble mean of 15%-30% (±12%-17%) in the North and South Atlantic and Pacific, and the Indian Ocean by 2100, whereas polar ocean basins experienced a 20%-80% (±35%-200%) increase. Uncertainty and model disagreement were greatest in the Arctic and smallest in the South Pacific Ocean. Projected changes were reduced under a low (RCP2.6) emissions scenario. Under RCP2.6 and RCP8.5, biomass projections were highly correlated with changes in net primary production and negatively correlated with projected sea surface temperature increases across all ocean basins except the polar oceans. Ecosystem structure was projected to shift as animal biomass concentrated in different size-classes across ocean basins and emissions scenarios. We highlight that climate change mitigation measures could moderate the impacts on marine animal biomass by reducing biomass declines in the Pacific, Atlantic, and Indian Ocean basins. The range of individual model projections emphasizes the importance of using an ensemble approach in assessing uncertainty of future change.
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Affiliation(s)
| | - Derek P Tittensor
- Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada
- United Nations Environment Programme World Conservation Monitoring Centre, Cambridge, UK
| | - Julia L Blanchard
- Institute for Marine and Antarctic Studies, Center for Marine Socioecology, University of Tasmania, Hobart, Tasmania, Australia
| | - William W L Cheung
- Nippon Foundation-UBC Nereus Program and Changing Ocean Research Unite, Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Marta Coll
- Institute of Marine Science (ICM-CSIC) and Ecopath International Initiative, Barcelona, Spain
| | - Eric D Galbraith
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
- Department of Mathematics, Institut de Ciència i Tecnologia Ambientals (ICTA), Universitat Autonoma de Barcelona, Barcelona, Spain
| | - Simon Jennings
- Lowestoft Laboratory, Centre for Environment, Fisheries and Aquaculture Science (CEFAS), Lowestoft, UK
- School of Environmental Sciences, University of East Anglia, Norwich, UK
- International Council for the Exploration of the Sea, København V, Denmark
| | - Olivier Maury
- Institut de Recherche pour le Développement (IRD), UMR 248 MARBEC, Sète Cedex, France
- International Lab. ICEMASA, University of Cape Town, Rondebosch, South Africa
| | - Heike K Lotze
- Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada
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15
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Wilson KL, Skinner MA, Lotze HK. Projected 21st‐century distribution of canopy‐forming seaweeds in the Northwest Atlantic with climate change. DIVERS DISTRIB 2019. [DOI: 10.1111/ddi.12897] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Affiliation(s)
- Kristen L. Wilson
- Department of Biology Dalhousie University Halifax Nova Scotia Canada
| | - Marc A. Skinner
- Department of Biology Dalhousie University Halifax Nova Scotia Canada
- Stantec Consulting Ltd Dartmouth Nova Scotia Canada
| | - Heike K. Lotze
- Department of Biology Dalhousie University Halifax Nova Scotia Canada
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16
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Hurley I, Wringe BF, den Heyer CE, Shackell NL, Lotze HK. Spatiotemporal bycatch analysis of the Atlantic halibut (
Hippoglossus hippoglossus
) longline fishery survey indicates hotspots for species of conservation concern. Conservation Science and Practice 2019. [DOI: 10.1111/csp2.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Affiliation(s)
- Isabelle Hurley
- Biology DepartmentDalhousie University Halifax Nova Scotia Canada
| | - Brendan F. Wringe
- Bedford Institute of OceanographyFisheries and Oceans Canada Dartmouth Nova Scotia Canada
| | - Cornelia E. den Heyer
- Bedford Institute of OceanographyFisheries and Oceans Canada Dartmouth Nova Scotia Canada
| | - Nancy L. Shackell
- Bedford Institute of OceanographyFisheries and Oceans Canada Dartmouth Nova Scotia Canada
| | - Heike K. Lotze
- Biology DepartmentDalhousie University Halifax Nova Scotia Canada
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17
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Hurley I, Wringe BF, den Heyer CE, Shackell NL, Lotze HK. Spatiotemporal bycatch analysis of the Atlantic halibut ( Hippoglossus hippoglossus
) longline fishery survey indicates hotspots for species of conservation concern. Conservation Science and Practice 2019. [DOI: 10.1002/csp2.3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Isabelle Hurley
- Biology Department; Dalhousie University; Halifax Nova Scotia Canada
| | - Brendan F. Wringe
- Bedford Institute of Oceanography; Fisheries and Oceans Canada; Dartmouth Nova Scotia Canada
| | - Cornelia E. den Heyer
- Bedford Institute of Oceanography; Fisheries and Oceans Canada; Dartmouth Nova Scotia Canada
| | - Nancy L. Shackell
- Bedford Institute of Oceanography; Fisheries and Oceans Canada; Dartmouth Nova Scotia Canada
| | - Heike K. Lotze
- Biology Department; Dalhousie University; Halifax Nova Scotia Canada
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18
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Cullain N, McIver R, Schmidt AL, Milewski I, Lotze HK. Potential impacts of finfish aquaculture on eelgrass ( Zostera marina) beds and possible monitoring metrics for management: a case study in Atlantic Canada. PeerJ 2018; 6:e5630. [PMID: 30310739 PMCID: PMC6174869 DOI: 10.7717/peerj.5630] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 08/22/2018] [Indexed: 11/23/2022] Open
Abstract
Eelgrass (Zostera marina) has been designated an Ecologically Significant Species in Atlantic Canada. The development and rapid expansion of netpen finfish aquaculture into sensitive coastal habitats has raised concerns about the impacts of finfish aquaculture on eelgrass habitats. To date, no studies have been done in Atlantic Canada to examine these impacts or to identify potential monitoring variables that would aid in the development of specific conservation and management objectives. As a first step in addressing this gap, we examined differences in environmental variables, eelgrass bed structure and macroinfauna communities at increasing distances from a finfish farm in Port Mouton Bay, a reference site in adjacent Port Joli Bay, and published survey results from other sites without finfish farms along the Atlantic Coast of Nova Scotia. Drawing on research done elsewhere and our results, we then identified possible metrics for assessing and monitoring local impacts of finfish aquaculture on eelgrass habitats. Our results suggest some nutrient and organic enrichment, higher epiphyte loads, lower eelgrass cover and biomass, and lower macroinfauna biomass closer to the farm. Moreover, community structure significantly differed between sites with some species increasing and others decreasing closer to the farm. Changes in the macroinfauna community could be linked to observed differences in environmental and eelgrass bed variables. These results provide new insights into the potential impacts of finfish aquaculture on eelgrass habitats in Atlantic Canada. We recommend a suite of measures for assessment and monitoring that take into account response time to disturbance and account for different levels of eelgrass organizational response (from physiological to community).
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Affiliation(s)
- Nakia Cullain
- Department of Biology, Dalhousie University, Halifax, Canada
| | - Reba McIver
- Department of Biology, Dalhousie University, Halifax, Canada
| | | | - Inka Milewski
- Department of Biology, Dalhousie University, Halifax, Canada
| | - Heike K Lotze
- Department of Biology, Dalhousie University, Halifax, Canada
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19
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Lotze HK, Flemming JM, Magera AM. Critical factors for the recovery of marine mammals. Conserv Biol 2017; 31:1301-1311. [PMID: 28489264 DOI: 10.1111/cobi.12957] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 03/31/2017] [Accepted: 05/05/2017] [Indexed: 06/07/2023]
Abstract
{en} Over the past decades, much research has focused on understanding the critical factors for marine extinctions with the aim of preventing further species losses in the oceans. Although conservation and management strategies are enabling several species and populations to recover, others remain at low abundance levels or continue to decline. To understand these discrepancies, we used a published database on abundance trends of 137 populations of marine mammals worldwide and compiled data on 28 potentially critical factors for recovery. We then applied random forests and additive mixed models to determine which intrinsic and extrinsic factors are critical for the recovery of marine mammals. A mix of life-history characteristics, ecological traits, phylogenetic relatedness, population size, geographic range, human impacts, and management efforts explained why populations recovered or not. Consistently, species with lower age at maturity and intermediate habitat area were more likely to recover, which is consistent with life-history and ecological theory. Body size, trophic level, social interactions, dominant habitat, ocean basin, and habitat disturbance also explained some differences in recovery patterns. Overall, a variety of intrinsic and extrinsic factors were important for species' recovery, pointing to cumulative effects. Our results provide insight for improving conservation and management strategies to enhance recoveries in the future.
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Affiliation(s)
- Heike K Lotze
- Department of Biology, Dalhousie University, 1355 Oxford Street, P.O. Box 15000, Halifax, NS B3H 4R2, Canada
| | - Joanna Mills Flemming
- Department of Mathematics and Statistics, Dalhousie University, 1355 Oxford Street, P.O. Box 15000, Halifax, NS B3H 4R2, Canada
| | - Anna M Magera
- Department of Biology, Dalhousie University, 1355 Oxford Street, P.O. Box 15000, Halifax, NS B3H 4R2, Canada
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20
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Blanchard JL, Watson RA, Fulton EA, Cottrell RS, Nash KL, Bryndum-Buchholz A, Büchner M, Carozza DA, Cheung WWL, Elliott J, Davidson LNK, Dulvy NK, Dunne JP, Eddy TD, Galbraith E, Lotze HK, Maury O, Müller C, Tittensor DP, Jennings S. Linked sustainability challenges and trade-offs among fisheries, aquaculture and agriculture. Nat Ecol Evol 2017; 1:1240-1249. [PMID: 29046559 DOI: 10.1038/s41559-017-0258-8] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 06/28/2017] [Indexed: 11/09/2022]
Abstract
Fisheries and aquaculture make a crucial contribution to global food security, nutrition and livelihoods. However, the UN Sustainable Development Goals separate marine and terrestrial food production sectors and ecosystems. To sustainably meet increasing global demands for fish, the interlinkages among goals within and across fisheries, aquaculture and agriculture sectors must be recognized and addressed along with their changing nature. Here, we assess and highlight development challenges for fisheries-dependent countries based on analyses of interactions and trade-offs between goals focusing on food, biodiversity and climate change. We demonstrate that some countries are likely to face double jeopardies in both fisheries and agriculture sectors under climate change. The strategies to mitigate these risks will be context-dependent, and will need to directly address the trade-offs among Sustainable Development Goals, such as halting biodiversity loss and reducing poverty. Countries with low adaptive capacity but increasing demand for food require greater support and capacity building to transition towards reconciling trade-offs. Necessary actions are context-dependent and include effective governance, improved management and conservation, maximizing societal and environmental benefits from trade, increased equitability of distribution and innovation in food production, including continued development of low input and low impact aquaculture.
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Affiliation(s)
- Julia L Blanchard
- Institute for Marine & Antarctic Studies (IMAS), University of Tasmania, GPO Box 252-49, Hobart, TAS, 7001, Australia. .,Centre for Marine Socioecology, University of Tasmania, GPO Box 252-49, Hobart, TAS, 7001, Australia.
| | - Reg A Watson
- Institute for Marine & Antarctic Studies (IMAS), University of Tasmania, GPO Box 252-49, Hobart, TAS, 7001, Australia.,Centre for Marine Socioecology, University of Tasmania, GPO Box 252-49, Hobart, TAS, 7001, Australia
| | - Elizabeth A Fulton
- Centre for Marine Socioecology, University of Tasmania, GPO Box 252-49, Hobart, TAS, 7001, Australia.,CSIRO Oceans & Atmosphere, GPO Box 1538, Hobart, TAS, 7001, Australia
| | - Richard S Cottrell
- Institute for Marine & Antarctic Studies (IMAS), University of Tasmania, GPO Box 252-49, Hobart, TAS, 7001, Australia.,Centre for Marine Socioecology, University of Tasmania, GPO Box 252-49, Hobart, TAS, 7001, Australia
| | - Kirsty L Nash
- Institute for Marine & Antarctic Studies (IMAS), University of Tasmania, GPO Box 252-49, Hobart, TAS, 7001, Australia.,Centre for Marine Socioecology, University of Tasmania, GPO Box 252-49, Hobart, TAS, 7001, Australia
| | | | - Matthias Büchner
- Potsdam Institute for Climate Impact Research, Telegraphenberg A31, 14473, Potsdam, Germany
| | - David A Carozza
- Department of Mathematics, Université du Québec à Montréal, Montréal, Canada
| | - William W L Cheung
- Changing Ocean Research Unit, Institute for the Oceans and Fisheries, The University of British Columbia, AERL, 2202 Main Mall, Vancouver, BC, V6T 1Z4, Canada
| | - Joshua Elliott
- University of Chicago Computation Institute, Chicago, IL, 60637, USA
| | - Lindsay N K Davidson
- Earth to Ocean Research Group, Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada
| | - Nicholas K Dulvy
- Earth to Ocean Research Group, Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada
| | - John P Dunne
- National Oceanic and Atmospheric Administration/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, 08540, USA
| | - Tyler D Eddy
- Department of Biology, Dalhousie University, PO Box 15000, Halifax, NS, B3H 4R2, Canada.,Changing Ocean Research Unit, Institute for the Oceans and Fisheries, The University of British Columbia, AERL, 2202 Main Mall, Vancouver, BC, V6T 1Z4, Canada
| | - Eric Galbraith
- Institut de Ciència i Tecnologia Ambientals (ICTA) and Department of Mathematics, Universitat Autonoma de Barcelona, Bellaterra, 08193, Spain.,ICREA, Pg. Lluís Companys 23, 08010, Barcelona, Spain
| | - Heike K Lotze
- Department of Biology, Dalhousie University, PO Box 15000, Halifax, NS, B3H 4R2, Canada
| | - Olivier Maury
- IRD, UMR 248 MARBEC, Av Jean Monnet CS 30171, 34203, SETE cedex, France
| | - Christoph Müller
- Potsdam Institute for Climate Impact Research, Telegraphenberg A31, 14473, Potsdam, Germany
| | - Derek P Tittensor
- United Nations Environment Programme World Conservation Monitoring Centre, 219 Huntingdon Road, Cambridge, CB3 0DL, UK
| | - Simon Jennings
- Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory, Lowestoft, NR33 0HT, UK.,School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.,International Council for the Exploration of the Sea, H.C. Andersens Blvd 44-46, 1553, København V, Denmark
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21
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Baker DGL, Eddy TD, McIver R, Schmidt AL, Thériault MH, Boudreau M, Courtenay SC, Lotze HK. Comparative analysis of different survey methods for monitoring fish assemblages in coastal habitats. PeerJ 2016; 4:e1832. [PMID: 27018396 PMCID: PMC4806602 DOI: 10.7717/peerj.1832] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 03/01/2016] [Indexed: 11/20/2022] Open
Abstract
Coastal ecosystems are among the most productive yet increasingly threatened marine ecosystems worldwide. Particularly vegetated habitats, such as eelgrass (Zostera marina) beds, play important roles in providing key spawning, nursery and foraging habitats for a wide range of fauna. To properly assess changes in coastal ecosystems and manage these critical habitats, it is essential to develop sound monitoring programs for foundation species and associated assemblages. Several survey methods exist, thus understanding how different methods perform is important for survey selection. We compared two common methods for surveying macrofaunal assemblages: beach seine netting and underwater visual census (UVC). We also tested whether assemblages in shallow nearshore habitats commonly sampled by beach seines are similar to those of nearby eelgrass beds often sampled by UVC. Among five estuaries along the Southern Gulf of St. Lawrence, Canada, our results suggest that the two survey methods yield comparable results for species richness, diversity and evenness, yet beach seines yield significantly higher abundance and different species composition. However, sampling nearshore assemblages does not represent those in eelgrass beds despite considerable overlap and close proximity. These results have important implications for how and where macrofaunal assemblages are monitored in coastal ecosystems. Ideally, multiple survey methods and locations should be combined to complement each other in assessing the entire assemblage and full range of changes in coastal ecosystems, thereby better informing coastal zone management.
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Affiliation(s)
- Duncan G L Baker
- Department of Biology, Dalhousie University , Halifax, Nova Scotia , Canada
| | - Tyler D Eddy
- Department of Biology, Dalhousie University , Halifax, Nova Scotia , Canada
| | - Reba McIver
- Department of Biology, Dalhousie University , Halifax, Nova Scotia , Canada
| | - Allison L Schmidt
- Department of Biology, Dalhousie University , Halifax, Nova Scotia , Canada
| | | | - Monica Boudreau
- Fisheries and Oceans, Gulf Fisheries Centre , Moncton, New Brunswick , Canada
| | - Simon C Courtenay
- Fisheries and Oceans, Gulf Fisheries Centre, Moncton, New Brunswick, Canada; University of Waterloo, Canadian Rivers Institute, Waterloo, Ontario, Canada
| | - Heike K Lotze
- Department of Biology, Dalhousie University , Halifax, Nova Scotia , Canada
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22
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Orzechowski EA, Lockwood R, Byrnes JEK, Anderson SC, Finnegan S, Finkel ZV, Harnik PG, Lindberg DR, Liow LH, Lotze HK, McClain CR, McGuire JL, O'Dea A, Pandolfi JM, Simpson C, Tittensor DP. Marine extinction risk shaped by trait-environment interactions over 500 million years. Glob Chang Biol 2015; 21:3595-3607. [PMID: 26190141 DOI: 10.1111/gcb.12963] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 04/08/2015] [Accepted: 04/10/2015] [Indexed: 06/04/2023]
Abstract
Perhaps the most pressing issue in predicting biotic responses to present and future global change is understanding how environmental factors shape the relationship between ecological traits and extinction risk. The fossil record provides millions of years of insight into how extinction selectivity (i.e., differential extinction risk) is shaped by interactions between ecological traits and environmental conditions. Numerous paleontological studies have examined trait-based extinction selectivity; however, the extent to which these patterns are shaped by environmental conditions is poorly understood due to a lack of quantitative synthesis across studies. We conducted a meta-analysis of published studies on fossil marine bivalves and gastropods that span 458 million years to uncover how global environmental and geochemical changes covary with trait-based extinction selectivity. We focused on geographic range size and life habit (i.e., infaunal vs. epifaunal), two of the most important and commonly examined predictors of extinction selectivity. We used geochemical proxies related to global climate, as well as indicators of ocean acidification, to infer average global environmental conditions. Life-habit selectivity is weakly dependent on environmental conditions, with infaunal species relatively buffered from extinction during warmer climate states. In contrast, the odds of taxa with broad geographic ranges surviving an extinction (>2500 km for genera, >500 km for species) are on average three times greater than narrow-ranging taxa (estimate of odds ratio: 2.8, 95% confidence interval = 2.3-3.5), regardless of the prevailing global environmental conditions. The environmental independence of geographic range size extinction selectivity emphasizes the critical role of geographic range size in setting conservation priorities.
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Affiliation(s)
- Emily A Orzechowski
- Department of Integrative Biology and Museum of Paleontology, University of California, Berkeley, CA, 94720, USA
| | - Rowan Lockwood
- Department of Geology, College of William and Mary, Williamsburg, VA, 23187, USA
| | - Jarrett E K Byrnes
- Biology Department, University of Massachusetts Boston, 100 Morrissey Blvd, Boston, MA, 02125, USA
| | - Sean C Anderson
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - Seth Finnegan
- Department of Integrative Biology and Museum of Paleontology, University of California, Berkeley, CA, 94720, USA
| | - Zoe V Finkel
- Environmental Science Program, Mount Allison University, Sackville, NB, E4L 1A5, Canada
| | - Paul G Harnik
- Department of Earth and Environment, Franklin and Marshall College, Lancaster, PA, 17604, USA
| | - David R Lindberg
- Department of Integrative Biology and Museum of Paleontology, University of California, Berkeley, CA, 94720, USA
| | - Lee Hsiang Liow
- Center for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, Blindern, N-0316, Oslo, Norway
| | - Heike K Lotze
- Department of Biology, Dalhousie University, 1355 Oxford Street, P.O. Box 15000, Halifax, NS, B3H 4R2, Canada
| | - Craig R McClain
- National Evolutionary Synthesis Center, Durham, NC, 27705, USA
| | - Jenny L McGuire
- School of Biology, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Aaron O'Dea
- Smithsonian Tropical Research Institute, 0843-03092, Balboa, Republic of Panamá
| | - John M Pandolfi
- Australian Research Council Centre of Excellence for Coral Reef Studies, School of Biological Sciences, The University of Queensland, Brisbane, Qld, 4072, Australia
| | - Carl Simpson
- Department of Paleobiology, Smithsonian Institution, P.O. Box 37012 MRC-121, Washington, DC, 20013-7012, USA
| | - Derek P Tittensor
- Department of Biology, Dalhousie University, 1355 Oxford Street, P.O. Box 15000, Halifax, NS, B3H 4R2, Canada
- United Nations Environment Programme World Conservation Monitoring Centre, 219 Huntingdon Road, Cambridge, CB3 0DL, UK
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23
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Finnegan S, Anderson SC, Harnik PG, Simpson C, Tittensor DP, Byrnes JE, Finkel ZV, Lindberg DR, Liow LH, Lockwood R, Lotze HK, McClain CR, McGuire JL, O'Dea A, Pandolfi JM. Extinctions. Paleontological baselines for evaluating extinction risk in the modern oceans. Science 2015; 348:567-70. [PMID: 25931558 DOI: 10.1126/science.aaa6635] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Marine taxa are threatened by anthropogenic impacts, but knowledge of their extinction vulnerabilities is limited. The fossil record provides rich information on past extinctions that can help predict biotic responses. We show that over 23 million years, taxonomic membership and geographic range size consistently explain a large proportion of extinction risk variation in six major taxonomic groups. We assess intrinsic risk-extinction risk predicted by paleontologically calibrated models-for modern genera in these groups. Mapping the geographic distribution of these genera identifies coastal biogeographic provinces where fauna with high intrinsic risk are strongly affected by human activity or climate change. Such regions are disproportionately in the tropics, raising the possibility that these ecosystems may be particularly vulnerable to future extinctions. Intrinsic risk provides a prehuman baseline for considering current threats to marine biodiversity.
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Affiliation(s)
- Seth Finnegan
- Department of Integrative Biology, University of California, Berkeley, CA 94720, USA.
| | - Sean C Anderson
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Paul G Harnik
- Department of Earth and Environment, Franklin and Marshall College, Lancaster, PA 17604, USA
| | - Carl Simpson
- Department of Paleobiology, National Museum of Natural History, Washington, DC 20013, USA
| | - Derek P Tittensor
- United Nations Environment Programme World Conservation Monitoring Centre, Cambridge CB3 0DL, UK. Computational Science Laboratory, Microsoft Research, Cambridge CB1 2FB, UK. Department of Biology, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Jarrett E Byrnes
- Department of Biology, University of Massachusetts, Boston, MA 02125, USA
| | - Zoe V Finkel
- Environmental Science Program, Mount Allison University, Sackville, New Brunswick E4L 1A5, Canada
| | - David R Lindberg
- Department of Integrative Biology, University of California, Berkeley, CA 94720, USA
| | - Lee Hsiang Liow
- Center for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, Blindern, N-0316 Oslo, Norway
| | - Rowan Lockwood
- Department of Geology, College of William and Mary, Williamsburg, VA 23187, USA
| | - Heike K Lotze
- Department of Biology, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Craig R McClain
- National Evolutionary Synthesis Center, Durham, NC 27705, USA
| | - Jenny L McGuire
- School of Environmental and Forest Sciences, University of Washington, Seattle, WA 98195, USA
| | - Aaron O'Dea
- Smithsonian Tropical Research Institute, 0843-03092, Balboa, Republic of Panamá
| | - John M Pandolfi
- Australian Research Council Centre of Excellence for Coral Reef Studies, School of Biological Sciences, University of Queensland, St. Lucia, QLD 4072, Australia
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24
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Britten GL, Dowd M, Minto C, Ferretti F, Boero F, Lotze HK. Predator decline leads to decreased stability in a coastal fish community. Ecol Lett 2014; 17:1518-25. [DOI: 10.1111/ele.12354] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 05/04/2014] [Accepted: 08/12/2014] [Indexed: 11/30/2022]
Affiliation(s)
- Gregory L. Britten
- Department of Biology; Dalhousie University; Halifax NS Canada
- Department of Mathematics and Statistics; Dalhousie University; Halifax NS Canada
| | - Michael Dowd
- Department of Mathematics and Statistics; Dalhousie University; Halifax NS Canada
| | - Cóilín Minto
- Marine and Freshwater Research Centre; Galway-Mayo Institute of Technology; Galway Ireland
| | | | | | - Heike K. Lotze
- Department of Biology; Dalhousie University; Halifax NS Canada
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25
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Abstract
Marine mammals have greatly benefitted from a shift from resource exploitation towards conservation. Often lauded as symbols of conservation success, some marine mammal populations have shown remarkable recoveries after severe depletions. Others have remained at low abundance levels, continued to decline, or become extinct or extirpated. Here we provide a quantitative assessment of (1) publicly available population-level abundance data for marine mammals worldwide, (2) abundance trends and recovery status, and (3) historic population decline and recent recovery. We compiled 182 population abundance time series for 47 species and identified major data gaps. In order to compare across the largest possible set of time series with varying data quality, quantity and frequency, we considered an increase in population abundance as evidence of recovery. Using robust log-linear regression over three generations, we were able to classify abundance trends for 92 spatially non-overlapping populations as Significantly Increasing (42%), Significantly Decreasing (10%), Non-Significant Change (28%) and Unknown (20%). Our results were comparable to IUCN classifications for equivalent species. Among different groupings, pinnipeds and other marine mammals (sirenians, polar bears and otters) showed the highest proportion of recovering populations, likely benefiting from relatively fast life histories and nearshore habitats that provided visibility and protective management measures. Recovery was less frequent among cetaceans, but more common in coastal than offshore populations. For marine mammals with available historical abundance estimates (n = 47), larger historical population declines were associated with low or variable recent recoveries so far. Overall, our results show that many formerly depleted marine mammal populations are recovering. However, data-deficient populations and those with decreasing and non-significant trends require attention. In particular, increased study of populations with major data gaps, including offshore small cetaceans, cryptic species, and marine mammals in low latitudes and developing nations, is needed to better understand the status of marine mammal populations worldwide.
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Affiliation(s)
- Anna M. Magera
- Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada
- * E-mail:
| | | | - Kristin Kaschner
- Department of Biometry and Environmental System Analysis, University of Freiburg, Freiburg, Germany
- CESAB (Centre de Synthèse et d′Analyse sur la Biodiversité), Immeuble Henri Poincaré, Domaine du Petit Arbois, Aix-en-Provence, France
| | - Line B. Christensen
- Fisheries Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Heike K. Lotze
- Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada
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26
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Harnik PG, Lotze HK, Anderson SC, Finkel ZV, Finnegan S, Lindberg DR, Liow LH, Lockwood R, McClain CR, McGuire JL, O'Dea A, Pandolfi JM, Simpson C, Tittensor DP. Extinctions in ancient and modern seas. Trends Ecol Evol 2012; 27:608-17. [PMID: 22889500 DOI: 10.1016/j.tree.2012.07.010] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 07/16/2012] [Accepted: 07/18/2012] [Indexed: 01/07/2023]
Abstract
In the coming century, life in the ocean will be confronted with a suite of environmental conditions that have no analog in human history. Thus, there is an urgent need to determine which marine species will adapt and which will go extinct. Here, we review the growing literature on marine extinctions and extinction risk in the fossil, historical, and modern records to compare the patterns, drivers, and biological correlates of marine extinctions at different times in the past. Characterized by markedly different environmental states, some past periods share common features with predicted future scenarios. We highlight how the different records can be integrated to better understand and predict the impact of current and projected future environmental changes on extinction risk in the ocean.
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Affiliation(s)
- Paul G Harnik
- National Evolutionary Synthesis Center, Durham, NC 27705, USA.
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27
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Abstract
Many elasmobranchs have experienced strong population declines, which have been largely attributed to the direct and indirect effects of exploitation. Recently, however, live elasmobranchs are being increasingly valued for their role in marine ecosystems, dive tourism and intrinsic worth. Thus, management plans have been implemented to slow and ultimately reverse negative trends, including shark-specific (e.g. anti-finning laws) to ecosystem-based (e.g. no-take marine reserves) strategies. Yet it is unclear how successful these measures are, or will be, given the degree of depletion and slow recovery potential of most elasmobranchs. Here, current understanding of elasmobranch population recoveries is reviewed. The potential and realized extent of population increases, including rates of increase, timelines and drivers are evaluated. Across 40 increasing populations, only 25% were attributed to decreased anthropogenic mortality, while the majority was attributed to predation release. It is also shown that even low exploitation rates (2-6% per year) can halt or reverse positive population trends in six populations currently managed under recovery plans. Management measures that help restore elasmobranch populations include enforcement or near-zero fishing mortality, protection of critical habitats, monitoring and education. These measures are highlighted in a case study from the south-eastern U.S.A., where some evidence of recovery is seen in Pristis pectinata, Galeocerdo cuvier and Sphyrna lewini populations. It is concluded that recovery of elasmobranchs is certainly possible but requires time and a combination of strong and dedicated management actions to be successful.
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Affiliation(s)
- C A Ward-Paige
- Department of Biology, Dalhousie University, Halifax NS, B3H 4R2, Canada.
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Lotze HK, Coll M, Magera AM, Ward-Paige C, Airoldi L. Recovery of marine animal populations and ecosystems. Trends Ecol Evol 2011; 26:595-605. [PMID: 21852017 DOI: 10.1016/j.tree.2011.07.008] [Citation(s) in RCA: 134] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Revised: 07/14/2011] [Accepted: 07/15/2011] [Indexed: 11/19/2022]
Abstract
Many marine populations and ecosystems have experienced strong historical depletions, yet reports of recoveries are increasing. Here, we review the growing research on marine recoveries to reveal how common recovery is, its magnitude, timescale and major drivers. Overall, 10-50% of depleted populations and ecosystems show some recovery, but rarely to former levels of abundance. In addition, recovery can take many decades for long-lived species and complex ecosystems. Major drivers of recovery include the reduction of human impacts, especially exploitation, habitat loss and pollution, combined with favorable life-history and environmental conditions. Awareness, legal protection and enforcement of management plans are also crucial. Learning from historical recovery successes and failures is essential for implementing realistic conservation goals and promising management strategies.
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Affiliation(s)
- Heike K Lotze
- Biology Department, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada.
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Coll M, Schmidt A, Romanuk T, Lotze HK. Food-web structure of seagrass communities across different spatial scales and human impacts. PLoS One 2011; 6:e22591. [PMID: 21811637 PMCID: PMC3141067 DOI: 10.1371/journal.pone.0022591] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2011] [Accepted: 06/28/2011] [Indexed: 11/23/2022] Open
Abstract
Seagrass beds provide important habitat for a wide range of marine species but are threatened by multiple human impacts in coastal waters. Although seagrass communities have been well-studied in the field, a quantification of their food-web structure and functioning, and how these change across space and human impacts has been lacking. Motivated by extensive field surveys and literature information, we analyzed the structural features of food webs associated with Zostera marina across 16 study sites in 3 provinces in Atlantic Canada. Our goals were to (i) quantify differences in food-web structure across local and regional scales and human impacts, (ii) assess the robustness of seagrass webs to simulated species loss, and (iii) compare food-web structure in temperate Atlantic seagrass beds with those of other aquatic ecosystems. We constructed individual food webs for each study site and cumulative webs for each province and the entire region based on presence/absence of species, and calculated 16 structural properties for each web. Our results indicate that food-web structure was similar among low impact sites across regions. With increasing human impacts associated with eutrophication, however, food-web structure show evidence of degradation as indicated by fewer trophic groups, lower maximum trophic level of the highest top predator, fewer trophic links connecting top to basal species, higher fractions of herbivores and intermediate consumers, and higher number of prey per species. These structural changes translate into functional changes with impacted sites being less robust to simulated species loss. Temperate Atlantic seagrass webs are similar to a tropical seagrass web, yet differed from other aquatic webs, suggesting consistent food-web characteristics across seagrass ecosystems in different regions. Our study illustrates that food-web structure and functioning of seagrass habitats change with human impacts and that the spatial scale of food-web analysis is critical for determining results.
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Affiliation(s)
- Marta Coll
- Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada.
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Anderson SC, Flemming JM, Watson R, Lotze HK. Rapid global expansion of invertebrate fisheries: trends, drivers, and ecosystem effects. PLoS One 2011; 6:e14735. [PMID: 21408090 PMCID: PMC3050978 DOI: 10.1371/journal.pone.0014735] [Citation(s) in RCA: 144] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2010] [Accepted: 01/17/2011] [Indexed: 11/19/2022] Open
Abstract
Background Worldwide, finfish fisheries are receiving increasing assessment and regulation, slowly leading to more sustainable exploitation and rebuilding. In their wake, invertebrate fisheries are rapidly expanding with little scientific scrutiny despite increasing socio-economic importance. Methods and Findings We provide the first global evaluation of the trends, drivers, and population and ecosystem consequences of invertebrate fisheries based on a global catch database in combination with taxa-specific reviews. We also develop new methodologies to quantify temporal and spatial trends in resource status and fishery development. Since 1950, global invertebrate catches have increased 6-fold with 1.5 times more countries fishing and double the taxa reported. By 2004, 34% of invertebrate fisheries were over-exploited, collapsed, or closed. New fisheries have developed increasingly rapidly, with a decrease of 6 years (3 years) in time to peak from the 1950s to 1990s. Moreover, some fisheries have expanded further and further away from their driving market, encompassing a global fishery by the 1990s. 71% of taxa (53% of catches) are harvested with habitat-destructive gear, and many provide important ecosystem functions including habitat, filtration, and grazing. Conclusions Our findings suggest that invertebrate species, which form an important component of the basis of marine food webs, are increasingly exploited with limited stock and ecosystem-impact assessments, and enhanced management attention is needed to avoid negative consequences for ocean ecosystems and human well-being.
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Affiliation(s)
- Sean C Anderson
- Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada.
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Lotze HK, Coll M, Dunne JA. Historical Changes in Marine Resources, Food-web Structure and Ecosystem Functioning in the Adriatic Sea, Mediterranean. Ecosystems 2010. [DOI: 10.1007/s10021-010-9404-8] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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McCauley DJ, Micheli F, Young HS, Tittensor DP, Brumbaugh DR, Madin EMP, Holmes KE, Smith JE, Lotze HK, DeSalles PA, Arnold SN, Worm B. Acute effects of removing large fish from a near-pristine coral reef. Mar Biol 2010; 157:2739-2750. [PMID: 24391253 PMCID: PMC3873048 DOI: 10.1007/s00227-010-1533-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Accepted: 08/11/2010] [Indexed: 06/01/2023]
Abstract
Large animals are severely depleted in many ecosystems, yet we are only beginning to understand the ecological implications of their loss. To empirically measure the short-term effects of removing large animals from an ocean ecosystem, we used exclosures to remove large fish from a near-pristine coral reef at Palmyra Atoll, Central Pacific Ocean. We identified a range of effects that followed from the removal of these large fish. These effects were revealed within weeks of their removal. Removing large fish (1) altered the behavior of prey fish; (2) reduced rates of herbivory on certain species of reef algae; (3) had both direct positive (reduced mortality of coral recruits) and indirect negative (through reduced grazing pressure on competitive algae) impacts on recruiting corals; and (4) tended to decrease abundances of small mobile benthic invertebrates. Results of this kind help advance our understanding of the ecological importance of large animals in ecosystems.
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Affiliation(s)
| | - Fiorenza Micheli
- Hopkins Marine Station, Stanford University, Pacific Grove, CA 93950 USA
| | | | | | - Daniel R. Brumbaugh
- Center for Biodiversity and Conservation, American Museum of Natural History, New York, NY 10024 USA
- Institute of Marine Sciences, University of California, Santa Cruz, CA 95060 USA
| | - Elizabeth M. P. Madin
- Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, CA 93106 USA
| | - Katherine E. Holmes
- Center for Biodiversity and Conservation, American Museum of Natural History, New York, NY 10024 USA
- Marine Program, Wildlife Conservation Society, Kavieng, New Ireland Province Papua New Guinea
| | - Jennifer E. Smith
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093 USA
| | - Heike K. Lotze
- Biology Department, Dalhousie University, Halifax, NS B3H 4J1 Canada
| | | | | | - Boris Worm
- Biology Department, Dalhousie University, Halifax, NS B3H 4J1 Canada
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Ward-Paige CA, Mora C, Lotze HK, Pattengill-Semmens C, McClenachan L, Arias-Castro E, Myers RA. Large-scale absence of sharks on reefs in the greater-Caribbean: a footprint of human pressures. PLoS One 2010; 5:e11968. [PMID: 20700530 PMCID: PMC2916824 DOI: 10.1371/journal.pone.0011968] [Citation(s) in RCA: 153] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2010] [Accepted: 06/16/2010] [Indexed: 11/18/2022] Open
Abstract
Background In recent decades, large pelagic and coastal shark populations have declined dramatically with increased fishing; however, the status of sharks in other systems such as coral reefs remains largely unassessed despite a long history of exploitation. Here we explore the contemporary distribution and sighting frequency of sharks on reefs in the greater-Caribbean and assess the possible role of human pressures on observed patterns. Methodology/Principal Findings We analyzed 76,340 underwater surveys carried out by trained volunteer divers between 1993 and 2008. Surveys were grouped within one km2 cells, which allowed us to determine the contemporary geographical distribution and sighting frequency of sharks. Sighting frequency was calculated as the ratio of surveys with sharks to the total number of surveys in each cell. We compared sighting frequency to the number of people in the cell vicinity and used population viability analyses to assess the effects of exploitation on population trends. Sharks, with the exception of nurse sharks occurred mainly in areas with very low human population or strong fishing regulations and marine conservation. Population viability analysis suggests that exploitation alone could explain the large-scale absence; however, this pattern is likely to be exacerbated by additional anthropogenic stressors, such as pollution and habitat degradation, that also correlate with human population. Conclusions/Significance Human pressures in coastal zones have lead to the broad-scale absence of sharks on reefs in the greater-Caribbean. Preventing further loss of sharks requires urgent management measures to curb fishing mortality and to mitigate other anthropogenic stressors to protect sites where sharks still exist. The fact that sharks still occur in some densely populated areas where strong fishing regulations are in place indicates the possibility of success and encourages the implementation of conservation measures.
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Coll M, Piroddi C, Steenbeek J, Kaschner K, Ben Rais Lasram F, Aguzzi J, Ballesteros E, Bianchi CN, Corbera J, Dailianis T, Danovaro R, Estrada M, Froglia C, Galil BS, Gasol JM, Gertwagen R, Gil J, Guilhaumon F, Kesner-Reyes K, Kitsos MS, Koukouras A, Lampadariou N, Laxamana E, López-Fé de la Cuadra CM, Lotze HK, Martin D, Mouillot D, Oro D, Raicevich S, Rius-Barile J, Saiz-Salinas JI, San Vicente C, Somot S, Templado J, Turon X, Vafidis D, Villanueva R, Voultsiadou E. The biodiversity of the Mediterranean Sea: estimates, patterns, and threats. PLoS One 2010; 5:e11842. [PMID: 20689844 PMCID: PMC2914016 DOI: 10.1371/journal.pone.0011842] [Citation(s) in RCA: 551] [Impact Index Per Article: 39.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Accepted: 06/10/2010] [Indexed: 11/18/2022] Open
Abstract
The Mediterranean Sea is a marine biodiversity hot spot. Here we combined an extensive literature analysis with expert opinions to update publicly available estimates of major taxa in this marine ecosystem and to revise and update several species lists. We also assessed overall spatial and temporal patterns of species diversity and identified major changes and threats. Our results listed approximately 17,000 marine species occurring in the Mediterranean Sea. However, our estimates of marine diversity are still incomplete as yet-undescribed species will be added in the future. Diversity for microbes is substantially underestimated, and the deep-sea areas and portions of the southern and eastern region are still poorly known. In addition, the invasion of alien species is a crucial factor that will continue to change the biodiversity of the Mediterranean, mainly in its eastern basin that can spread rapidly northwards and westwards due to the warming of the Mediterranean Sea. Spatial patterns showed a general decrease in biodiversity from northwestern to southeastern regions following a gradient of production, with some exceptions and caution due to gaps in our knowledge of the biota along the southern and eastern rims. Biodiversity was also generally higher in coastal areas and continental shelves, and decreases with depth. Temporal trends indicated that overexploitation and habitat loss have been the main human drivers of historical changes in biodiversity. At present, habitat loss and degradation, followed by fishing impacts, pollution, climate change, eutrophication, and the establishment of alien species are the most important threats and affect the greatest number of taxonomic groups. All these impacts are expected to grow in importance in the future, especially climate change and habitat degradation. The spatial identification of hot spots highlighted the ecological importance of most of the western Mediterranean shelves (and in particular, the Strait of Gibraltar and the adjacent Alboran Sea), western African coast, the Adriatic, and the Aegean Sea, which show high concentrations of endangered, threatened, or vulnerable species. The Levantine Basin, severely impacted by the invasion of species, is endangered as well. This abstract has been translated to other languages (File S1).
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Affiliation(s)
- Marta Coll
- Institut de Ciències del Mar, Scientific Spanish Council (ICM-CSIC), Barcelona, Spain.
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Ward-Paige C, Mills Flemming J, Lotze HK. Overestimating fish counts by non-instantaneous visual censuses: consequences for population and community descriptions. PLoS One 2010; 5:e11722. [PMID: 20661304 PMCID: PMC2908695 DOI: 10.1371/journal.pone.0011722] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2010] [Accepted: 06/18/2010] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Increasingly, underwater visual censuses (UVC) are used to assess fish populations. Several studies have demonstrated the effectiveness of protected areas for increasing fish abundance or provided insight into the natural abundance and structure of reef fish communities in remote areas. Recently, high apex predator densities (>100,000 individuals x km(-2)) and biomasses (>4 tonnes x ha(-1)) have been reported for some remote islands suggesting the occurrence of inverted trophic biomass pyramids. However, few studies have critically evaluated the methods used for sampling conspicuous and highly mobile fish such as sharks. Ideally, UVC are done instantaneously, however, researchers often count animals that enter the survey area after the survey has started, thus performing non-instantaneous UVC. METHODOLOGY/PRINCIPAL FINDINGS We developed a simulation model to evaluate counts obtained by divers deploying non-instantaneous belt-transect and stationary-point-count techniques. We assessed how fish speed and survey procedure (visibility, diver speed, survey time and dimensions) affect observed fish counts. Results indicate that the bias caused by fish speed alone is huge, while survey procedures had varying effects. Because the fastest fishes tend to be the largest, the bias would have significant implications on their biomass contribution. Therefore, caution is needed when describing abundance, biomass, and community structure based on non-instantaneous UVC, especially for highly mobile species such as sharks. CONCLUSIONS/SIGNIFICANCE Based on our results, we urge that published literature state explicitly whether instantaneous counts were made and that survey procedures be accounted for when non-instantaneous counts are used. Using published density and biomass values of communities that include sharks we explore the effect of this bias and suggest that further investigation may be needed to determine pristine shark abundances and the existence of inverted biomass pyramids. Because such studies are used to make important management and conservation decisions, incorrect estimates of animal abundance and biomass have serious and significant implications.
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Affiliation(s)
- Francesco Ferretti
- Biology Department, Dalhousie University, 1355 Oxford Street, Halifax, Nova Scotia B3H4J1, Canada.
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Worm B, Hilborn R, Baum JK, Branch TA, Collie JS, Costello C, Fogarty MJ, Fulton EA, Hutchings JA, Jennings S, Jensen OP, Lotze HK, Mace PM, McClanahan TR, Minto C, Palumbi SR, Parma AM, Ricard D, Rosenberg AA, Watson R, Zeller D. Rebuilding Global Fisheries. Science 2009; 325:578-85. [PMID: 19644114 DOI: 10.1126/science.1173146] [Citation(s) in RCA: 1491] [Impact Index Per Article: 99.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
After a long history of overexploitation, increasing efforts to restore marine ecosystems and rebuild fisheries are under way. Here, we analyze current trends from a fisheries and conservation perspective. In 5 of 10 well-studied ecosystems, the average exploitation rate has recently declined and is now at or below the rate predicted to achieve maximum sustainable yield for seven systems. Yet 63% of assessed fish stocks worldwide still require rebuilding, and even lower exploitation rates are needed to reverse the collapse of vulnerable species. Combined fisheries and conservation objectives can be achieved by merging diverse management actions, including catch restrictions, gear modification, and closed areas, depending on local context. Impacts of international fleets and the lack of alternatives to fishing complicate prospects for rebuilding fisheries in many poorer regions, highlighting the need for a global perspective on rebuilding marine resources.
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Affiliation(s)
- Boris Worm
- Biology Department, Dalhousie University, Halifax, NS B3H 4J1, Canada
| | - Ray Hilborn
- School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98195–5020, USA
| | - Julia K. Baum
- Scripps Institution of Oceanography, University of California-San Diego, La Jolla, CA 92093–0202, USA
| | - Trevor A. Branch
- School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98195–5020, USA
| | - Jeremy S. Collie
- Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, USA
| | - Christopher Costello
- Donald Bren School of Environmental Science and Management, University of California, Santa Barbara, CA 93106–5131, USA
| | - Michael J. Fogarty
- National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Woods Hole, MA 02543, USA
| | - Elizabeth A. Fulton
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Marine and Atmospheric Research, General Post Office Box 1538, Hobart, TAS 7001, Australia
| | | | - Simon Jennings
- Centre for Environment, Fisheries and Aquaculture Science, Lowestoft NR33 0HT, UK
- School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK
| | - Olaf P. Jensen
- School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98195–5020, USA
| | - Heike K. Lotze
- Biology Department, Dalhousie University, Halifax, NS B3H 4J1, Canada
| | - Pamela M. Mace
- Ministry of Fisheries, Post Office Box 1020, Wellington, New Zealand
| | - Tim R. McClanahan
- Wildlife Conservation Society Marine Programs, Post Office Box 99470, Mombasa, Kenya
| | - Cóilín Minto
- Biology Department, Dalhousie University, Halifax, NS B3H 4J1, Canada
| | - Stephen R. Palumbi
- Hopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA
| | - Ana M. Parma
- Centro Nacional Patagónico, 9120 Puerto Madryn, Argentina
| | - Daniel Ricard
- Biology Department, Dalhousie University, Halifax, NS B3H 4J1, Canada
| | - Andrew A. Rosenberg
- Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824–3525, USA
| | - Reg Watson
- Fisheries Centre, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Dirk Zeller
- Fisheries Centre, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
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Lotze HK, Worm B. Historical baselines for large marine animals. Trends Ecol Evol 2009; 24:254-62. [PMID: 19251340 DOI: 10.1016/j.tree.2008.12.004] [Citation(s) in RCA: 175] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2008] [Revised: 12/07/2008] [Accepted: 12/08/2008] [Indexed: 10/21/2022]
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Abstract
Evidence for severe declines in large predatory fishes is increasing around the world. Because of its long history of intense fishing, the Mediterranean Sea offers a unique perspective on fish population declines over historical timescales. We used a diverse set of records dating back to the early 19th and mid 20th century to reconstruct long-term population trends of large predatory sharks in the northwestern Mediterranean Sea. We compiled 9 time series of abundance indices from commercial and recreational fishery landings, scientific surveys, and sighting records. Generalized linear models were used to extract instantaneous rates of change from each data set, and a meta-analysis was conducted to compare population trends. Only 5 of the 20 species we considered had sufficient records for analysis. Hammerhead (Sphyrna spp.), blue (Prionace glauca), mackerel (Isurus oxyrinchus and Lamna nasus), and thresher sharks (Alopias vulpinus) declined between 96 and 99.99% relative to their former abundance. According to World Conservation Union (IUCN) criteria, these species would be considered critically endangered. So far, the lack of quantitative population assessments has impeded shark conservation in the Mediterranean Sea. Our study fills this critical information gap, suggesting that current levels of exploitation put large sharks at risk of extinction in the Mediterranean Sea. Possible ecosystem effects of these losses involve a disruption of top-down control and a release of midlevel consumers.
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Affiliation(s)
- Francesco Ferretti
- Department of Biology, Life Sciences Centre, 1355 Oxford Street, Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada.
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Worm B, Barbier EB, Beaumont N, Duffy JE, Folke C, Halpern BS, Jackson JBC, Lotze HK, Micheli F, Palumbi SR, Sala E, Selkoe KA, Stachowicz JJ, Watson R. Response to Comments on "Impacts of Biodiversity Loss on Ocean Ecosystem Services". Science 2007. [DOI: 10.1126/science.1138466] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Boris Worm
- Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1
- Department of Economics and Finance, University of Wyoming, Laramie, WY 82071, USA
- Plymouth Marine Laboratory, Plymouth PL1 3DH, UK
- Virginia Institute of Marine Science, Gloucester Point, VA 23062–1346, USA
- Department of Systems Ecology, Stockholm University, Stockholm SE-106 91, Sweden
| | - Edward B. Barbier
- Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1
- Department of Economics and Finance, University of Wyoming, Laramie, WY 82071, USA
- Plymouth Marine Laboratory, Plymouth PL1 3DH, UK
- Virginia Institute of Marine Science, Gloucester Point, VA 23062–1346, USA
- Department of Systems Ecology, Stockholm University, Stockholm SE-106 91, Sweden
| | - Nicola Beaumont
- Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1
- Department of Economics and Finance, University of Wyoming, Laramie, WY 82071, USA
- Plymouth Marine Laboratory, Plymouth PL1 3DH, UK
- Virginia Institute of Marine Science, Gloucester Point, VA 23062–1346, USA
- Department of Systems Ecology, Stockholm University, Stockholm SE-106 91, Sweden
| | - J. Emmett Duffy
- Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1
- Department of Economics and Finance, University of Wyoming, Laramie, WY 82071, USA
- Plymouth Marine Laboratory, Plymouth PL1 3DH, UK
- Virginia Institute of Marine Science, Gloucester Point, VA 23062–1346, USA
- Department of Systems Ecology, Stockholm University, Stockholm SE-106 91, Sweden
| | - Carl Folke
- Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1
- Department of Economics and Finance, University of Wyoming, Laramie, WY 82071, USA
- Plymouth Marine Laboratory, Plymouth PL1 3DH, UK
- Virginia Institute of Marine Science, Gloucester Point, VA 23062–1346, USA
- Department of Systems Ecology, Stockholm University, Stockholm SE-106 91, Sweden
| | - Benjamin S. Halpern
- Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1
- Department of Economics and Finance, University of Wyoming, Laramie, WY 82071, USA
- Plymouth Marine Laboratory, Plymouth PL1 3DH, UK
- Virginia Institute of Marine Science, Gloucester Point, VA 23062–1346, USA
- Department of Systems Ecology, Stockholm University, Stockholm SE-106 91, Sweden
| | - Jeremy B. C. Jackson
- Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1
- Department of Economics and Finance, University of Wyoming, Laramie, WY 82071, USA
- Plymouth Marine Laboratory, Plymouth PL1 3DH, UK
- Virginia Institute of Marine Science, Gloucester Point, VA 23062–1346, USA
- Department of Systems Ecology, Stockholm University, Stockholm SE-106 91, Sweden
| | - Heike K. Lotze
- Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1
- Department of Economics and Finance, University of Wyoming, Laramie, WY 82071, USA
- Plymouth Marine Laboratory, Plymouth PL1 3DH, UK
- Virginia Institute of Marine Science, Gloucester Point, VA 23062–1346, USA
- Department of Systems Ecology, Stockholm University, Stockholm SE-106 91, Sweden
| | - Fiorenza Micheli
- Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1
- Department of Economics and Finance, University of Wyoming, Laramie, WY 82071, USA
- Plymouth Marine Laboratory, Plymouth PL1 3DH, UK
- Virginia Institute of Marine Science, Gloucester Point, VA 23062–1346, USA
- Department of Systems Ecology, Stockholm University, Stockholm SE-106 91, Sweden
| | - Stephen R. Palumbi
- Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1
- Department of Economics and Finance, University of Wyoming, Laramie, WY 82071, USA
- Plymouth Marine Laboratory, Plymouth PL1 3DH, UK
- Virginia Institute of Marine Science, Gloucester Point, VA 23062–1346, USA
- Department of Systems Ecology, Stockholm University, Stockholm SE-106 91, Sweden
| | - Enric Sala
- Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1
- Department of Economics and Finance, University of Wyoming, Laramie, WY 82071, USA
- Plymouth Marine Laboratory, Plymouth PL1 3DH, UK
- Virginia Institute of Marine Science, Gloucester Point, VA 23062–1346, USA
- Department of Systems Ecology, Stockholm University, Stockholm SE-106 91, Sweden
| | - Kimberley A. Selkoe
- Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1
- Department of Economics and Finance, University of Wyoming, Laramie, WY 82071, USA
- Plymouth Marine Laboratory, Plymouth PL1 3DH, UK
- Virginia Institute of Marine Science, Gloucester Point, VA 23062–1346, USA
- Department of Systems Ecology, Stockholm University, Stockholm SE-106 91, Sweden
| | - John J. Stachowicz
- Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1
- Department of Economics and Finance, University of Wyoming, Laramie, WY 82071, USA
- Plymouth Marine Laboratory, Plymouth PL1 3DH, UK
- Virginia Institute of Marine Science, Gloucester Point, VA 23062–1346, USA
- Department of Systems Ecology, Stockholm University, Stockholm SE-106 91, Sweden
| | - Reg Watson
- Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1
- Department of Economics and Finance, University of Wyoming, Laramie, WY 82071, USA
- Plymouth Marine Laboratory, Plymouth PL1 3DH, UK
- Virginia Institute of Marine Science, Gloucester Point, VA 23062–1346, USA
- Department of Systems Ecology, Stockholm University, Stockholm SE-106 91, Sweden
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Worm B, Barbier EB, Beaumont N, Duffy JE, Folke C, Halpern BS, Jackson JBC, Lotze HK, Micheli F, Palumbi SR, Sala E, Selkoe KA, Stachowicz JJ, Watson R. Impacts of biodiversity loss on ocean ecosystem services. Science 2006; 314:787-90. [PMID: 17082450 DOI: 10.1126/science.1132294] [Citation(s) in RCA: 1184] [Impact Index Per Article: 65.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Human-dominated marine ecosystems are experiencing accelerating loss of populations and species, with largely unknown consequences. We analyzed local experiments, long-term regional time series, and global fisheries data to test how biodiversity loss affects marine ecosystem services across temporal and spatial scales. Overall, rates of resource collapse increased and recovery potential, stability, and water quality decreased exponentially with declining diversity. Restoration of biodiversity, in contrast, increased productivity fourfold and decreased variability by 21%, on average. We conclude that marine biodiversity loss is increasingly impairing the ocean's capacity to provide food, maintain water quality, and recover from perturbations. Yet available data suggest that at this point, these trends are still reversible.
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Affiliation(s)
- Boris Worm
- Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1.
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Lotze HK, Lenihan HS, Bourque BJ, Bradbury RH, Cooke RG, Kay MC, Kidwell SM, Kirby MX, Peterson CH, Jackson JBC. Depletion, Degradation, and Recovery Potential of Estuaries and Coastal Seas. Science 2006; 312:1806-9. [PMID: 16794081 DOI: 10.1126/science.1128035] [Citation(s) in RCA: 909] [Impact Index Per Article: 50.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Estuarine and coastal transformation is as old as civilization yet has dramatically accelerated over the past 150 to 300 years. Reconstructed time lines, causes, and consequences of change in 12 once diverse and productive estuaries and coastal seas worldwide show similar patterns: Human impacts have depleted >90% of formerly important species, destroyed >65% of seagrass and wetland habitat, degraded water quality, and accelerated species invasions. Twentieth-century conservation efforts achieved partial recovery of upper trophic levels but have so far failed to restore former ecosystem structure and function. Our results provide detailed historical baselines and quantitative targets for ecosystem-based management and marine conservation.
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Affiliation(s)
- Heike K Lotze
- Biology Department, Dalhousie University, 1355 Oxford Street, Halifax, NS, Canada B3H 4J1.
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Abstract
The open oceans comprise most of the biosphere, yet patterns and trends of species diversity there are enigmatic. Here, we derive worldwide patterns of tuna and billfish diversity over the past 50 years, revealing distinct subtropical "hotspots" that appeared to hold generally for other predators and zooplankton. Diversity was positively correlated with thermal fronts and dissolved oxygen and a nonlinear function of temperature (approximately 25 degrees C optimum). Diversity declined between 10 and 50% in all oceans, a trend that coincided with increased fishing pressure, superimposed on strong El Niño-Southern Oscillation-driven variability across the Pacific. We conclude that predator diversity shows a predictable yet eroding pattern signaling ecosystem-wide changes linked to climate and fishing.
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Affiliation(s)
- Boris Worm
- Biology Department, Dalhousie University, Halifax, NS, Canada B3H 4J1.
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Abstract
Concentrations of biodiversity, or hotspots, represent conservation priorities in terrestrial ecosystems but remain largely unexplored in marine habitats. In the open ocean, many large predators such as tunas, sharks, billfishes, and sea turtles are of current conservation concern because of their vulnerability to overfishing and ecosystem role. Here we use scientific-observer records from pelagic longline fisheries in the Atlantic and Pacific Oceans to show that oceanic predators concentrate in distinct diversity hotspots. Predator diversity consistently peaks at intermediate latitudes (20-30 degrees N and S), where tropical and temperate species ranges overlap. Individual hotspots are found close to prominent habitat features such as reefs, shelf breaks, or seamounts and often coincide with zooplankton and coral reef hotspots. Closed-area models in the northwest Atlantic predict that protection of hotspots outperforms other area closures in safeguarding threatened pelagic predators from ecological extinction. We conclude that the seemingly monotonous landscape of the open ocean shows rich structure in species diversity and that these features should be used to focus future conservation efforts.
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Affiliation(s)
- Boris Worm
- Biology Department, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4J1.
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Lotze HK, Worm B, Sommer U. Propagule banks, herbivory and nutrient supply control population development and dominance patterns in macroalgal blooms. OIKOS 2003. [DOI: 10.1034/j.1600-0706.2000.890106.x] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abstract
A key question in ecology is which factors control species diversity in a community. Two largely separate groups of ecologists have emphasized the importance of productivity or resource supply, and consumers or physical disturbance, respectively. These variables show unimodal relationships with diversity when manipulated in isolation. Recent multivariate models, however, predict that these factors interact, such that the disturbance diversity relationship depends on productivity, and vice versa. We tested these models in marine food webs, using field manipulations of nutrient resources and consumer pressure on rocky shores of contrasting productivity. Here we show that the effects of consumers and nutrients on diversity consistently depend on each other, and that the direction of their effects and peak diversity shift between sites of low and high productivity. Factorial meta-analysis of published experiments confirms these results across widely varying aquatic communities. Furthermore, our experiments demonstrate that these patterns extend to important ecosystem functions such as carbon storage and nitrogen retention. This suggests that human impacts on nutrient supply and food-web structure have strong and interdependent effects on species diversity and ecosystem functioning, and must therefore be managed together.
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Affiliation(s)
- Boris Worm
- Biology Department, Dalhousie University, Halifax, Nova Scotia, B3H 4J1, Canada.
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