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Lewin PJ, Wynn J, Arcos JM, Austin RE, Blagrove J, Bond S, Carrasco G, Delord K, Fisher-Reeves L, García D, Gillies N, Guilford T, Hawkins I, Jaggers P, Kirk C, Louzao M, Maurice L, McMinn M, Micol T, Morford J, Morgan G, Moss J, Riera EM, Rodriguez A, Siddiqi-Davies K, Weimerskirch H, Wynn RB, Padget O. Climate change drives migratory range shift via individual plasticity in shearwaters. Proc Natl Acad Sci U S A 2024; 121:e2312438121. [PMID: 38285933 PMCID: PMC10861922 DOI: 10.1073/pnas.2312438121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 12/08/2023] [Indexed: 01/31/2024] Open
Abstract
How individual animals respond to climate change is key to whether populations will persist or go extinct. Yet, few studies investigate how changes in individual behavior underpin these population-level phenomena. Shifts in the distributions of migratory animals can occur through adaptation in migratory behaviors, but there is little understanding of how selection and plasticity contribute to population range shift. Here, we use long-term geolocator tracking of Balearic shearwaters (Puffinus mauretanicus) to investigate how year-to-year changes in individual birds' migrations underpin a range shift in the post-breeding migration. We demonstrate a northward shift in the post-breeding range and show that this is brought about by individual plasticity in migratory destination, with individuals migrating further north in response to changes in sea-surface temperature. Furthermore, we find that when individuals migrate further, they return faster, perhaps minimizing delays in return to the breeding area. Birds apparently judge the increased distance that they will need to migrate via memory of the migration route, suggesting that spatial cognitive mechanisms may contribute to this plasticity and the resulting range shift. Our study exemplifies the role that individual behavior plays in populations' responses to environmental change and highlights some of the behavioral mechanisms that might be key to understanding and predicting species persistence in response to climate change.
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Affiliation(s)
- Patrick J. Lewin
- Department of Biology, University of Oxford, OxfordOX1 3SZ, United Kingdom
| | - Joe Wynn
- Department of Biology, University of Oxford, OxfordOX1 3SZ, United Kingdom
- Institut für Vogelforschung “Vogelwarte Helgoland”, Wilhelmshaven26386, Germany
| | - José Manuel Arcos
- Programa Marino, Sociedad Española de Ornitología/BirdLife, Delegació de Catalunya, Barcelona08026, Spain
| | - Rhiannon E. Austin
- National Oceanography Centre–Southampton, SouthamptonSO14 3ZH, United Kingdom
- Earth Ocean and Ecological Sciences, School of Environmental Sciences, University of Liverpool, LiverpoolL69 3GP, United Kingdom
| | - Josephine Blagrove
- Department of Biology, University of Oxford, OxfordOX1 3SZ, United Kingdom
| | - Sarah Bond
- Department of Biology, University of Oxford, OxfordOX1 3SZ, United Kingdom
- School of Ocean Sciences, College of Science and Engineering, Bangor University, Menai BridgeLL59 5AB, United Kingdom
| | - Gemma Carrasco
- Iniciativa de Recerca de la Biodiversitat de les Illes, Alaior, Balearic Islands07730, Spain
| | - Karine Delord
- Centre d’Etudes Biologiques de Chizé, Laboratoire des Sciences de l'Environnement Marin, UMR 7372, Centre National de la Recherche Scientifique, Villiers en Bois79360, France
| | | | - David García
- Iniciativa de Recerca de la Biodiversitat de les Illes, Alaior, Balearic Islands07730, Spain
| | - Natasha Gillies
- Department of Biology, University of Oxford, OxfordOX1 3SZ, United Kingdom
- Earth Ocean and Ecological Sciences, School of Environmental Sciences, University of Liverpool, LiverpoolL69 3GP, United Kingdom
| | - Tim Guilford
- Department of Biology, University of Oxford, OxfordOX1 3SZ, United Kingdom
| | - Isobel Hawkins
- Department of Biology, University of Oxford, OxfordOX1 3SZ, United Kingdom
| | - Paris Jaggers
- Department of Biology, University of Oxford, OxfordOX1 3SZ, United Kingdom
| | - Christian Kirk
- Department of Biology, University of Oxford, OxfordOX1 3SZ, United Kingdom
| | - Maite Louzao
- AZTI, Marine Research, Basque Research and Technology Alliance, Pasaia20110, Spain
| | - Lou Maurice
- British Geological Survey, WallingfordOX10 8ED, United Kingdom
| | - Miguel McMinn
- Grupo Biogeografía, geodinámica y sedimentación del Mediterráneo occidental, Ciències i Tecnologies Mediambientals, Universitat de les Illes Balears,Palma, Balearic IslandsE07122, Spain
| | - Thierry Micol
- Ligue pour la Protection des Oiseaux, BirdLife International Partner in France, Rochefort Cedex17305, France
| | - Joe Morford
- Department of Biology, University of Oxford, OxfordOX1 3SZ, United Kingdom
| | - Greg Morgan
- Royal Society for the Protection of Birds, Ramsey Island, St. Davids, PembrokeshireSA62 6PY, United Kingdom
| | - Jason Moss
- Department of Biology, University of Oxford, OxfordOX1 3SZ, United Kingdom
| | - Elisa Miquel Riera
- Department of Biology, University of Oxford, OxfordOX1 3SZ, United Kingdom
| | - Ana Rodriguez
- Grupo Biogeografía, geodinámica y sedimentación del Mediterráneo occidental, Ciències i Tecnologies Mediambientals, Universitat de les Illes Balears,Palma, Balearic IslandsE07122, Spain
| | | | - Henri Weimerskirch
- Centre d’Etudes Biologiques de Chizé, Laboratoire des Sciences de l'Environnement Marin, UMR 7372, Centre National de la Recherche Scientifique, Villiers en Bois79360, France
| | - Russell B. Wynn
- National Oceanography Centre–Southampton, SouthamptonSO14 3ZH, United Kingdom
| | - Oliver Padget
- Department of Biology, University of Oxford, OxfordOX1 3SZ, United Kingdom
- Earth Ocean and Ecological Sciences, School of Environmental Sciences, University of Liverpool, LiverpoolL69 3GP, United Kingdom
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Kléparski L, Beaugrand G, Ostle C, Edwards M, Skogen MD, Djeghri N, Hátún H. Ocean climate and hydrodynamics drive decadal shifts in Northeast Atlantic dinoflagellates. GLOBAL CHANGE BIOLOGY 2024; 30:e17163. [PMID: 38380701 DOI: 10.1111/gcb.17163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 12/04/2023] [Accepted: 12/26/2023] [Indexed: 02/22/2024]
Abstract
The abundance of large marine dinoflagellates has declined in the North Sea since 1958. Although hypotheses have been proposed to explain this diminution (increasing temperature and wind), the mechanisms behind this pattern have thus far remained elusive. In this article, we study the long-term changes in dinoflagellate biomass and biodiversity in relation to hydro-climatic conditions and circulation within the North Atlantic. Our results show that the decline in biomass has paralleled an increase in biodiversity caused by a temperature-induced northward movement of subtropical taxa along the European shelf-edge, and facilitated by changes in oceanic circulation (subpolar gyre contraction). However, major changes in North Atlantic hydrodynamics in the 2010s (subpolar gyre expansion and low-salinity anomaly) stopped this movement, which triggered a biodiversity collapse in the North Sea. Further, North Sea dinoflagellate biomass remained low because of warming. Our results, therefore, reveal that regional climate warming and changes in oceanic circulation strongly influenced shifts in dinoflagellate biomass and biodiversity.
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Affiliation(s)
- Loïck Kléparski
- UMR 8187-LOG-Laboratoire d'Océanologie et de Géosciences, Univ. Littoral Côte d'Opale, CNRS, Univ. Lille, Wimereux, France
- Continuous Plankton Recorder Survey, Marine Biological Association, Plymouth, UK
| | - Grégory Beaugrand
- UMR 8187-LOG-Laboratoire d'Océanologie et de Géosciences, Univ. Littoral Côte d'Opale, CNRS, Univ. Lille, Wimereux, France
| | - Clare Ostle
- Continuous Plankton Recorder Survey, Marine Biological Association, Plymouth, UK
| | - Martin Edwards
- Plymouth Marine Laboratory, Plymouth, UK
- School of Biological and Marine Sciences, University of Plymouth, Plymouth, UK
| | | | - Nicolas Djeghri
- Continuous Plankton Recorder Survey, Marine Biological Association, Plymouth, UK
| | - Hjálmar Hátún
- Faroe Marine Research Institute, Tórshavn, Faroe Islands
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Lheureux A, David V, Del Amo Y, Soudant D, Auby I, Bozec Y, Conan P, Ganthy F, Grégori G, Lefebvre A, Leynart A, Rimmelin-Maury P, Souchu P, Vantrepote V, Blondel C, Cariou T, Crispi O, Cordier MA, Crouvoisier M, Duquesne V, Ferreira S, Garcia N, Gouriou L, Grosteffan E, Le Merrer Y, Meteigner C, Retho M, Tournaire MP, Savoye N. Trajectories of nutrients concentrations and ratios in the French coastal ecosystems: 20 years of changes in relation with large-scale and local drivers. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159619. [PMID: 36280086 DOI: 10.1016/j.scitotenv.2022.159619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 10/17/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
Along with their important diversity, coastal ecosystems receive various amounts of nutrients, principally arising from the continent and from the related human activities (mainly industrial and agricultural activities). During the 20th century, nutrients loads have increased following the increase of both the global population and need of services. Alongside, climate change including temperature increase or atmospheric circulation change has occurred. These processes, Ecosystem state changes are hard to monitor and predict. To study the long-term changes of nutrients concentrations in coastal ecosystems, eleven French coastal ecosystems were studied over 20 years as they encompass large climatic and land pressures, representative of temperate ecosystems, over a rather small geographical area. Both univariate (time series decomposition) and multivariate (relationships between ecosystems and drivers) statistical analyses were used to determine ecosystem trajectories as well as typologies of ecosystem trajectories. It appeared that most of the French coastal ecosystems exhibited trajectories towards a decrease in nutrients concentrations. Differences in trajectories mainly depended on continental and human influences, as well as on climatic regimes. One single ecosystem exhibited very different trajectories, the Arcachon Bay with an increase in nutrients concentrations. Ecosystem trajectories based on ordination techniques were proven to be useful tools to monitor ecosystem changes. This study highlighted the importance of local environments and the need to couple uni- and multi-ecosystem studies. Although the studied ecosystems were influenced by both local and large-scale climate, by anthropogenic activities loads, and that their trajectories were mostly similar based on their continental influence, non-negligible variations resulted from their internal functioning.
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Affiliation(s)
- Arnaud Lheureux
- Université de Bordeaux-CNRS, UMR 5805, Environnement Paléoenvironnement Océaniques et Côtiers (EPOC), 2 Rue du Professeur Jolyet, 33120 Arcachon, France.
| | - Valérie David
- Université de Bordeaux-CNRS, UMR 5805, Environnement Paléoenvironnement Océaniques et Côtiers (EPOC), 2 Rue du Professeur Jolyet, 33120 Arcachon, France
| | - Yolanda Del Amo
- Université de Bordeaux-CNRS, UMR 5805, Environnement Paléoenvironnement Océaniques et Côtiers (EPOC), 2 Rue du Professeur Jolyet, 33120 Arcachon, France
| | - Dominique Soudant
- Ifremer Nantes, Valorisation de l'Information pour la Gestion Intégrée Et la Surveillance (VIGIES), 44311 Cedex 03, Rue de l'Île d'Yeu, 44980 Nantes, France
| | - Isabelle Auby
- Ifremer, LER AR 1 Quai du Commandant Silhouette, 33120 Arcachon, France
| | - Yann Bozec
- Sorbonne Université, UPMC Univ. Paris 06, CNRS, UMR 7144 AD2M, Station Biologique de Roscoff, 29680 Roscoff, France
| | - Pascal Conan
- Sorbonne Université, UPMC Univ. Paris 06, CNRS, UMR7621 LOMIC, Observatoire Océanologique, F-66650 Banyuls sur Mer, France
| | - Florian Ganthy
- Ifremer, LER AR 1 Quai du Commandant Silhouette, 33120 Arcachon, France
| | - Gérald Grégori
- Aix-Marseille Université, Univ. de Toulon, CNRS, INSU, IRD, UM 110 MIO, 163 Avenue de Luminy, 13288 Marseille, France
| | - Alain Lefebvre
- Ifremer, Unité Littoral, Laboratoire Environnement Ressources, 150 Quai Gambetta, 62320 Boulogne-sur-Mer, France
| | - Aude Leynart
- IUEM-UAR 3113, rue Dumont d'Urville, 29280 Plouzané, France
| | | | - Philippe Souchu
- Ifremer, LER MPL Rue de l'Ile d'Yeu, BP 21105, 44311, Cedex 03, Nantes, France
| | - Vincent Vantrepote
- Univ. Littoral Côte d'Opale, Univ. Lille, CNRS, UMR 8187 LOG, F-62930 Wimereux, France
| | - Camille Blondel
- Ifremer, Unité Littoral, Laboratoire Environnement Ressources, 150 Quai Gambetta, 62320 Boulogne-sur-Mer, France
| | - Thierry Cariou
- Sorbonne Université, UPMC Univ. Paris 06, CNRS, UMR 7144 AD2M, Station Biologique de Roscoff, 29680 Roscoff, France; IRD, UAR191, Instrumentation, Moyens Analytiques, Observatoires en Géophysique et Océanographie (IMAGO), Technopôle de Brest-Iroise, Plouzané, France
| | - Olivier Crispi
- Sorbonne Université, UPMC Univ. Paris 06, CNRS, UMR7621 LOMIC, Observatoire Océanologique, F-66650 Banyuls sur Mer, France
| | - Marie-Ange Cordier
- Université de Bordeaux-CNRS, UMR 5805, Environnement Paléoenvironnement Océaniques et Côtiers (EPOC), 2 Rue du Professeur Jolyet, 33120 Arcachon, France
| | - Muriel Crouvoisier
- Univ. Littoral Côte d'Opale, Univ. Lille, CNRS, UMR 8187 LOG, F-62930 Wimereux, France
| | - Vincent Duquesne
- Ifremer, Unité Littoral, Laboratoire Environnement Ressources, 150 Quai Gambetta, 62320 Boulogne-sur-Mer, France
| | - Sophie Ferreira
- Université de Bordeaux-CNRS, UMR 5805, Environnement Paléoenvironnement Océaniques et Côtiers (EPOC), 2 Rue du Professeur Jolyet, 33120 Arcachon, France
| | - Nicole Garcia
- Aix-Marseille Université, Univ. de Toulon, CNRS, INSU, IRD, UM 110 MIO, 163 Avenue de Luminy, 13288 Marseille, France
| | - Laure Gouriou
- Ifremer, LER AR 1 Quai du Commandant Silhouette, 33120 Arcachon, France
| | | | - Yoann Le Merrer
- Ifremer, LER MPL Rue de l'Ile d'Yeu, BP 21105, 44311, Cedex 03, Nantes, France
| | - Claire Meteigner
- Ifremer, LER AR 1 Quai du Commandant Silhouette, 33120 Arcachon, France
| | - Michael Retho
- Ifremer, LER MPL Rue de l'Ile d'Yeu, BP 21105, 44311, Cedex 03, Nantes, France
| | | | - Nicolas Savoye
- Université de Bordeaux-CNRS, UMR 5805, Environnement Paléoenvironnement Océaniques et Côtiers (EPOC), 2 Rue du Professeur Jolyet, 33120 Arcachon, France
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4
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Cruz-Flores M, Pradel R, Bried J, Militão T, Neves VC, González-Solís J, Ramos R. Will climate change affect the survival of tropical and subtropical species? Predictions based on Bulwer's petrel populations in the NE Atlantic Ocean. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 847:157352. [PMID: 35843319 DOI: 10.1016/j.scitotenv.2022.157352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 07/05/2022] [Accepted: 07/10/2022] [Indexed: 06/15/2023]
Abstract
Climate change has repeatedly been shown to impact the demography and survival of marine top predators. However, most evidence comes from single populations of widely distributed species, limited mainly to polar and subpolar environments. Here, we aimed to evaluate the influence of environmental conditions on the survival of a tropical and migratory seabird over the course of its annual cycle. We used capture-mark-recapture data from three populations of Bulwer's petrel (Bulweria bulwerii) spread across the NE Atlantic Ocean, from the Azores, Canary, and Cabo Verde Islands (including temperate to tropical zones). We also inferred how the survival of this seabird might be affected under different climatic scenarios, defined by the Intergovernmental Panel on Climate Change. Among the environmental variables whose effect we evaluated (North Atlantic Oscillation index, Southern Oscillation Index, Sea Surface Temperature [SST] and wind speed), SST estimated for the breeding area and season was the variable with the greatest influence on adult survival. Negative effects of SST increase emerged across the three populations, most likely through indirect trophic web interactions. Unfortunately, our study also shows that the survival of Bulwer's petrel will be profoundly affected by the different scenarios of climate change, even with the most optimistic trajectory involving the lowest greenhouse gas emission. Furthermore, for the first time, our study predicts stronger impacts of climate change on tropical populations than on subtropical and temperate ones. This result highlights the devastating effect that climate change may also have on tropical areas, and the importance of considering multi-population approaches when evaluating its impacts which may differ across species distributions.
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Affiliation(s)
- Marta Cruz-Flores
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Universitat de Barcelona (UB), Av. Diagonal 643, Barcelona 08028, Spain; Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Barcelona, Spain; Littoral, Environnement et Sociétés (LIENSs), UMR 7266 CNRS-La Rochelle Université, 2 Rue Olympe de Gouges, FR-17000 La Rochelle, France.
| | - Roger Pradel
- CEFE UMR 5175, CNRS - Université de Montpellier - Université Paul-Valéry Montpellier - EPHE, Montpellier, France
| | - Joël Bried
- Ocean Sciences Institute - Okeanos, University of the Azores, Horta, Portugal; 8 avenue de la reine Nathalie, 64200 Biarritz, France
| | - Teresa Militão
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Universitat de Barcelona (UB), Av. Diagonal 643, Barcelona 08028, Spain; Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Barcelona, Spain
| | - Verónica C Neves
- Ocean Sciences Institute - Okeanos, University of the Azores, Horta, Portugal
| | - Jacob González-Solís
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Universitat de Barcelona (UB), Av. Diagonal 643, Barcelona 08028, Spain; Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Barcelona, Spain
| | - Raül Ramos
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Universitat de Barcelona (UB), Av. Diagonal 643, Barcelona 08028, Spain; Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Barcelona, Spain
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Mos B, Mos D. Range expansion of a widespread Indo-Pacific haemulid, the barred javelin Pomadasys kaakan (Cuvier, 1830), in a climate change hotspot. JOURNAL OF FISH BIOLOGY 2022; 101:736-740. [PMID: 35638389 PMCID: PMC9540066 DOI: 10.1111/jfb.15125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 05/29/2022] [Indexed: 06/15/2023]
Abstract
The authors report a first sighting of a euryhaline fish in the climate change hotspot along Australia's south-eastern coast. The barred javelin, Pomadasys kaakan (Cuvier, 1830) was found in the Nambucca River in New South Wales, Australia, during 2021 and 2022. Specimens were adult, suggesting they may not be transitory vagrants. The new southernmost location recorded here represents a c. 200 km out-of-range sighting compared to previous records, and is c. 380 km south of the southernmost Australian stronghold of the species in Moreton Bay, Queensland.
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Affiliation(s)
- Benjamin Mos
- National Marine Science Centre, Faculty of Science and EngineeringSouthern Cross UniversityCoffs HarbourNew South WalesAustralia
| | - Daniel Mos
- Dan Mos ConstructionWirrimbiNew South WalesAustralia
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Lyashevska O, Brophy D, Wing S, Johns DG, Haberlin D, Doyle TK. Evidence of a range expansion in sunfish from 47 years of coastal sightings. MARINE BIOLOGY 2022; 169:20. [PMID: 35221377 PMCID: PMC8827117 DOI: 10.1007/s00227-021-04005-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 12/06/2021] [Indexed: 06/14/2023]
Abstract
UNLABELLED Almost nothing is known about the historical abundance of the ocean sunfish. Yet as an ecologically and functionally important taxa, understanding changes in abundance may be a useful indicator of how our seas are responding to anthropogenic changes including overfishing and climate change. Within this context, sightings from a coastal bird observatory (51.26 ∘ N, 9.30 ∘ W) over a 47 year period (from April to October 1971-2017) provided the first long-term index of sunfish abundance. Using a general linear mixed effect model with a hurdle to deal with imperfect detectability and to model trends, a higher probability of detecting sunfish was found in the 1990s and 2000s. Continuous Plankton Recorder (CPR) phytoplankton color indices and the annual mean position of the 13 ∘ C sea surface isotherm were significantly correlated with the probability of detecting sunfish. An increase in siphonophore abundance (as measured by the CPR) was also documented. However, this increase occurred 10-15 years after the sunfish increase and was not significantly correlated with sunfish abundance. Our results suggest that the observed increase in sunfish sightings is evidence of a range expansion because it was significantly correlated with the mean position of the 13 ∘ C isotherm which moved northwards by over 200 km. Furthermore, the observed increase in sunfish occured 10 years before sunfish sightings are documented in Icelandic and Norwegian waters, and was concurrent with well-known range expansions for other fish species during the 1990s. This study demonstrates how sustained citizen science projects can provide unique insights on the historical abundance of this enigmatic species. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s00227-021-04005-8.
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Affiliation(s)
- Olga Lyashevska
- Marine and Freshwater Research Centre, Galway Mayo Institute of Technology, Galway, Ireland
| | - Deirdre Brophy
- Marine and Freshwater Research Centre, Galway Mayo Institute of Technology, Galway, Ireland
| | - Steve Wing
- Cape Clear Bird Observatory, Birdwatch Ireland, Wicklow, Ireland
| | - David G. Johns
- The Marine Biological Association of the UK, Plymouth, UK
| | - Damien Haberlin
- Science Foundation Ireland Research Centre for Energy, Climate and Marine, Environmental Research Centre, University College Cork, Cork, Ireland
| | - Thomas K. Doyle
- Science Foundation Ireland Research Centre for Energy, Climate and Marine, Environmental Research Centre, University College Cork, Cork, Ireland
- School of Biological, Earth and Environmental Sciences, University College Cork, Cork, Ireland
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7
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Martín B, González–Arias J, Vicente–Vírseda JA. Machine learning as a successful approach for predicting complex spatio–temporal patterns in animal species abundance. ANIMAL BIODIVERSITY AND CONSERVATION 2021. [DOI: 10.32800/abc.2021.44.0289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Our aim was to identify an optimal analytical approach for accurately predicting complex spatio–temporal patterns in animal species distribution. We compared the performance of eight modelling techniques (generalized additive models, regression trees, bagged CART, k–nearest neighbors, stochastic gradient boosting, support vector machines, neural network, and random forest –enhanced form of bootstrap. We also performed extreme gradient boosting –an enhanced form of radiant boosting– to predict spatial patterns in abundance of migrating Balearic shearwaters based on data gathered within eBird. Derived from open–source datasets, proxies of frontal systems and ocean productivity domains that have been previously used to characterize the oceanographic habitats of seabirds were quantified, and then used as predictors in the models. The random
forest model showed the best performance according to the parameters assessed (RMSE value and R2). The correlation between observed and predicted abundance with this model was also considerably high. This study shows that the combination of machine learning techniques and massive data provided by open data sources is a useful approach for identifying the long–term spatial–temporal distribution of species at regional spatial scales.
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8
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Kléparski L, Beaugrand G, Edwards M. Plankton biogeography in the North Atlantic Ocean and its adjacent seas: Species assemblages and environmental signatures. Ecol Evol 2021; 11:5135-5149. [PMID: 34025997 PMCID: PMC8131763 DOI: 10.1002/ece3.7406] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 02/20/2021] [Indexed: 11/07/2022] Open
Abstract
Plankton biodiversity is a key component of marine pelagic ecosystems. They are at the base of the food web, control the productivity of marine ecosystems, and provide many provisioning and regulating ecological services. It is therefore important to understand how plankton are organized in both space and time. Here, we use data of varying taxonomic resolution, collected by the Continuous Plankton Recorder (CPR) survey, to map phytoplankton and zooplankton biodiversity in the North Atlantic and its adjacent seas. We then decompose biodiversity into 24 species assemblages and investigate their spatial distribution using ecological units and ecoregions recently proposed. Finally, we propose a descriptive method, which we call the environmental chromatogram, to characterize the environmental signature of each plankton assemblage. The method is based on a graphic that identifies where species of an assemblage aggregate along an environmental gradient composed of multiple ecological dimensions. The decomposition of the biodiversity into species assemblages allows us to show (a) that most marine regions of the North Atlantic are composed of coenoclines (i.e., gradients of biocoenoses or communities) and (b) that the overlapping spatial distribution of assemblages is the result of their environmental signatures. It follows that neither the ecoregions nor the ecological units identified in the North Atlantic are characterized by a unique assemblage but instead by a mosaic of assemblages that overlap in many places.
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Affiliation(s)
- Loïck Kléparski
- CNRSUMR 8187 – LOG – Laboratoire d’Océanologie et de GéosciencesUniv. Littoral Côte d’Opale, Univ. LilleWimereuxFrance
- Continuous Plankton Recorder (CPR) SurveyThe Marine Biological AssociationPlymouthUK
| | - Grégory Beaugrand
- CNRSUMR 8187 – LOG – Laboratoire d’Océanologie et de GéosciencesUniv. Littoral Côte d’Opale, Univ. LilleWimereuxFrance
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9
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Phillips JA, Banks AN, Bolton M, Brereton T, Cazenave P, Gillies N, Padget O, van der Kooij J, Waggitt J, Guilford T. Consistent concentrations of critically endangered Balearic shearwaters in UK waters revealed by at-sea surveys. Ecol Evol 2021; 11:1544-1557. [PMID: 33613988 PMCID: PMC7882943 DOI: 10.1002/ece3.7059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 09/16/2020] [Accepted: 10/21/2020] [Indexed: 11/10/2022] Open
Abstract
AIM Europe's only globally critically endangered seabird, the Balearic shearwater (Puffinus mauretanicus), is thought to have expanded its postbreeding range northwards into UK waters, though its at sea distribution there is not yet well understood. This study aims to identify environmental factors associated with the species' presence, map the probability of presence of the species across the western English Channel and southern Celtic Sea, and estimate the number of individuals in this area. LOCATION The western English Channel and southern Celtic Sea. METHODS This study analyses strip transect data collected between 2013 and 2017 from vessel-based surveys in the western English Channel and southern Celtic Sea during the Balearic shearwater's postbreeding period. Using environmental data collected directly and from remote sensors both Generalized Additive Models and the Random Forest machine learning model were used to determine shearwater presence at different locations. Abundance was estimated separately using a density multiplication approach. RESULTS Both models indicated that oceanographic features were better predictors of shearwater presence than fish abundance. Seafloor aspect, sea surface temperature, depth, salinity, and maximum current speed were the most important predictors. The estimated number of Balearic shearwaters in the prediction area ranged from 652 birds in 2017 to 6,904 birds in 2014. MAIN CONCLUSIONS Areas with consistently high probabilities of shearwater presence were identified at the Celtic Sea front. Our estimates suggest that the study area in southwest Britain supports between 2% and 23% of the global population of Balearic shearwaters. Based on the timing of the surveys (mainly in October), it is probable that most of the sighted shearwaters were immatures. This study provides the most complete understanding of Balearic shearwater distribution in UK waters available to date, information that will help inform any future conservation actions concerning this endangered species.
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Affiliation(s)
| | | | - Mark Bolton
- RSPB Centre for Conservation ScienceRoyal Society for the Protection of BirdsSandy, BedsUK
| | | | | | | | | | | | - James Waggitt
- School of Ocean SciencesBangor UniversityMenai BridgeUK
| | - Tim Guilford
- Department of ZoologyOxford UniversityOxfordUK
- Natural EnglandExeterUK
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10
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Martín B, Onrubia A, González-Arias J, Vicente-Vírseda JA. Citizen science for predicting spatio-temporal patterns in seabird abundance during migration. PLoS One 2020; 15:e0236631. [PMID: 32797051 PMCID: PMC7428152 DOI: 10.1371/journal.pone.0236631] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 07/11/2020] [Indexed: 11/30/2022] Open
Abstract
Pelagic seabirds are elusive species which are difficult to observe, thus determining their spatial distribution during the migration period is a difficult task. Here we undertook the first long-term study on the distribution of migrating shearwaters from data gathered within the framework of citizen science projects. Specifically, we collected daily abundance (only abundance given presence) of Balearic shearwaters from 2005 to 2017 from the online databases Trektellen and eBird. We applied machine-learning techniques, specifically Random Forest regression models, to predict shearwater abundance during migration using 15 environmental predictors. We built separated models for pre-breeding and post-breeding migration. When evaluated for the total data sample, the models explained more than 52% of the variation in shearwater abundance. The models also showed good ability to predict shearwater distributions for both migration periods (correlation between observed and predicted abundance was about 70%). However, relative variable importance and variation among the models built with different training data subsamples differed between migration periods. Our results showed that data gathered in citizen science initiatives together with recently available high-resolution satellite imagery, can be successfully applied to describe the migratory spatio-temporal patterns of seabird species accurately. We show that a predictive modelling approach may offer a powerful and cost-effective tool for the long-term monitoring of the migratory patterns in sensitive marine species, as well as to identify at sea areas relevant for their protection. Modelling approaches can also be essential tools to detect the impacts of climate and other global changes in this and other species within the range of the training data.
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Affiliation(s)
| | | | - Julio González-Arias
- Business and Finance Department, Faculty of Economics and Business, UNED, Madrid, Spain
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11
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Cursach JA, Arriagada A, Rau JR, Ojeda J, Bizama G, Becerra A. Predicting the potential distribution of the endemic seabird Pelecanus thagus in the Humboldt Current Large Marine Ecosystem under different climate change scenarios. PeerJ 2019; 7:e7642. [PMID: 31667011 PMCID: PMC6816470 DOI: 10.7717/peerj.7642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 08/07/2019] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND The effects of global climate change on species inhabiting marine ecosystems are of growing concern, especially for endemic species that are sensitive due to restricted distribution. One method employed for determining the effects of climate change on the distribution of these organisms is species distribution modeling. METHODS We generated a model to evaluate the potential geographic distribution and breeding distribution of the Peruvian pelican (Pelecanus thagus). Based on maximum entropy modeling (MaxEnt), we identified the environmental factors that currently affect its geographic distribution and breeding. Then we predicted its future distribution range under two climate change scenarios: moderate (rcp 2.6) and severe (rcp 8.5). RESULTS The mean daytime temperature range and marine primary productivity explain the current potential distribution and breeding of the pelican. Under the future climate change scenarios, the spatial distribution of the pelican is predicted to slightly change. While the breeding distribution of the pelican can benefit in the moderate scenario, it is predicted to decrease (near -20 %) in the severe scenario. DISCUSSION The current potential geographic distribution of the pelican is influenced to a large extent by thermal conditions and primary productivity. Under the moderate scenario, a slight increase in pelican breeding distribution is predicted. This increase in habitable area is explained by the climatic conditions in southern Chile, and those climatic conditions will likely be similar to the current conditions of the central coast of Chile. We predict that the coasts of southern Chile will constitute an important refuge for the conservation of the Peruvian pelican under future climate change scenarios.
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Affiliation(s)
- Jaime A. Cursach
- Programa de Doctorado en Ciencias Mención Manejo y Conservación de Recursos Naturales, Universidad de Los Lagos, Puerto Montt, Chile
| | - Aldo Arriagada
- Laboratorio de Limnología, Departamento de Acuicultura y Recursos Agroalimentarios, Universidad de Los Lagos, Osorno, Chile
| | - Jaime R. Rau
- Laboratorio de Ecología, Departamento de Ciencias Biológicas & Biodiversidad, Universidad de Los Lagos, Osorno, Chile
| | - Jaime Ojeda
- Laboratorio de Ecosistemas Marinos Antárticos y Subantárticos (LEMAS), Universidad de Magallanes, Punta Arenas, Chile
- Instituto de Ecología y Biodiversidad (IEB), Santiago, Chile
- School of Environmental Studies, University of Victoria, Victoria, British Colombia, Canada
| | - Gustavo Bizama
- Facultad de Ciencias, Universidad de Chile, Santiago, Chile
| | - Anderson Becerra
- Programa de Master en Ciencias y Tecnología Espacial, Escuela de Ingeniería, Universidad del País Vasco, Bilbao, Spain
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12
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Endemic shearwaters are increasing in the Mediterranean in relation to factors that are closely related to human activities. Glob Ecol Conserv 2019. [DOI: 10.1016/j.gecco.2019.e00740] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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13
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Druon JN, Hélaouët P, Beaugrand G, Fromentin JM, Palialexis A, Hoepffner N. Satellite-based indicator of zooplankton distribution for global monitoring. Sci Rep 2019; 9:4732. [PMID: 30894610 PMCID: PMC6427021 DOI: 10.1038/s41598-019-41212-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 02/28/2019] [Indexed: 11/16/2022] Open
Abstract
This study investigates the association between an index of mesozooplankton biomass, derived from the Continuous Plankton Recorder survey and satellite-derived productivity fronts in the North Atlantic. While chlorophyll-a content (CHL) is commonly described as a proxy for phytoplankton biomass, the size of productivity fronts estimated from the horizontal gradient of CHL appears to be directly linked to mesozooplankton biomass. Our results suggest that the lifespan of productivity fronts, which ranges from weeks to months, meets the time requirement of mesozooplankton to develop. The proposed indicator describes the daily distribution of mesozooplankton's suitable feeding habitat. It also provides a coherent interpretation of the productivity front development with respect to phytoplankton activity (CHL values) and potential predation by higher trophic levels. Since mesozooplankton are essential for feeding at higher trophic levels, this satellite-derived indicator delivers essential information for research and policy. An unanticipated positive trend of the indicator from 2003 to 2017 is observed at a basin scale under the current effects of climate change, with regional peaks in relatively poorly productive areas. Such monitoring indicator is potentially important to advances in marine food web modelling, fisheries science and the dynamic management of oceans towards sustainability.
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Affiliation(s)
- Jean-Noël Druon
- European Commission - Joint Research Centre, Directorate D - Sustainable Resources, Unit D.02 Water and Marine Resources, Ispra, VA, Italy.
| | - Pierre Hélaouët
- Marine Biological Association of the United Kingdom, The Laboratory, Citadel Hill, Plymouth, United Kingdom
| | - Grégory Beaugrand
- CNRS, Laboratoire d'Océanologie et de Géosciences UMR LOG CNRS 8187, Université des Sciences et Technologies Lille 1 - BP 80, 62930, Wimereux, France
| | | | - Andreas Palialexis
- European Commission - Joint Research Centre, Directorate D - Sustainable Resources, Unit D.02 Water and Marine Resources, Ispra, VA, Italy
| | - Nicolas Hoepffner
- European Commission - Joint Research Centre, Directorate D - Sustainable Resources, Unit D.02 Water and Marine Resources, Ispra, VA, Italy
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14
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Beaugrand G, Kirby RR. How Do Marine Pelagic Species Respond to Climate Change? Theories and Observations. ANNUAL REVIEW OF MARINE SCIENCE 2018; 10:169-197. [PMID: 29298137 DOI: 10.1146/annurev-marine-121916-063304] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this review, we show how climate affects species, communities, and ecosystems, and why many responses from the species to the biome level originate from the interaction between the species' ecological niche and changes in the environmental regime in both space and time. We describe a theory that allows us to understand and predict how marine species react to climate-induced changes in ecological conditions, how communities form and are reconfigured, and so how biodiversity is arranged and may respond to climate change. Our study shows that the responses of species to climate change are therefore intelligible-that is, they have a strong deterministic component and can be predicted.
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Affiliation(s)
- Grégory Beaugrand
- Laboratoire d'Océanologie et de Géosciences, CNRS UMR 8187 LOG, Université de Lille and Université du Littoral Côte d'Opale, F-62930 Wimereux, France;
- Sir Alister Hardy Foundation for Ocean Science, Plymouth PL1 2PB, United Kingdom
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15
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Bjorndal KA, Bolten AB, Chaloupka M, Saba VS, Bellini C, Marcovaldi MAG, Santos AJB, Bortolon LFW, Meylan AB, Meylan PA, Gray J, Hardy R, Brost B, Bresette M, Gorham JC, Connett S, Crouchley BVS, Dawson M, Hayes D, Diez CE, van Dam RP, Willis S, Nava M, Hart KM, Cherkiss MS, Crowder AG, Pollock C, Hillis-Starr Z, Muñoz Tenería FA, Herrera-Pavón R, Labrada-Martagón V, Lorences A, Negrete-Philippe A, Lamont MM, Foley AM, Bailey R, Carthy RR, Scarpino R, McMichael E, Provancha JA, Brooks A, Jardim A, López-Mendilaharsu M, González-Paredes D, Estrades A, Fallabrino A, Martínez-Souza G, Vélez-Rubio GM, Boulon RH, Collazo JA, Wershoven R, Guzmán Hernández V, Stringell TB, Sanghera A, Richardson PB, Broderick AC, Phillips Q, Calosso M, Claydon JAB, Metz TL, Gordon AL, Landry AM, Shaver DJ, Blumenthal J, Collyer L, Godley BJ, McGowan A, Witt MJ, Campbell CL, Lagueux CJ, Bethel TL, Kenyon L. Ecological regime shift drives declining growth rates of sea turtles throughout the West Atlantic. GLOBAL CHANGE BIOLOGY 2017; 23:4556-4568. [PMID: 28378354 DOI: 10.1111/gcb.13712] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 03/20/2017] [Accepted: 03/21/2017] [Indexed: 05/24/2023]
Abstract
Somatic growth is an integrated, individual-based response to environmental conditions, especially in ectotherms. Growth dynamics of large, mobile animals are particularly useful as bio-indicators of environmental change at regional scales. We assembled growth rate data from throughout the West Atlantic for green turtles, Chelonia mydas, which are long-lived, highly migratory, primarily herbivorous mega-consumers that may migrate over hundreds to thousands of kilometers. Our dataset, the largest ever compiled for sea turtles, has 9690 growth increments from 30 sites from Bermuda to Uruguay from 1973 to 2015. Using generalized additive mixed models, we evaluated covariates that could affect growth rates; body size, diet, and year have significant effects on growth. Growth increases in early years until 1999, then declines by 26% to 2015. The temporal (year) effect is of particular interest because two carnivorous species of sea turtles-hawksbills, Eretmochelys imbricata, and loggerheads, Caretta caretta-exhibited similar significant declines in growth rates starting in 1997 in the West Atlantic, based on previous studies. These synchronous declines in productivity among three sea turtle species across a trophic spectrum provide strong evidence that an ecological regime shift (ERS) in the Atlantic is driving growth dynamics. The ERS resulted from a synergy of the 1997/1998 El Niño Southern Oscillation (ENSO)-the strongest on record-combined with an unprecedented warming rate over the last two to three decades. Further support is provided by the strong correlations between annualized mean growth rates of green turtles and both sea surface temperatures (SST) in the West Atlantic for years of declining growth rates (r = -.94) and the Multivariate ENSO Index (MEI) for all years (r = .74). Granger-causality analysis also supports the latter finding. We discuss multiple stressors that could reinforce and prolong the effect of the ERS. This study demonstrates the importance of region-wide collaborations.
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Affiliation(s)
- Karen A Bjorndal
- Archie Carr Center for Sea Turtle Research and Department of Biology, University of Florida, Gainesville, FL, USA
| | - Alan B Bolten
- Archie Carr Center for Sea Turtle Research and Department of Biology, University of Florida, Gainesville, FL, USA
| | - Milani Chaloupka
- Ecological Modelling Services Pty Ltd, University of Queensland, St Lucia, QLD, Australia
| | - Vincent S Saba
- NOAA National Marine Fisheries Service, Northeast Fisheries Science Center, Geophysical Fluid Dynamics Laboratory, Princeton, NJ, USA
| | - Cláudio Bellini
- Centro TAMAR-ICMBio, CLBI - Parnamirim, Rio Grande do Norte, Brazil
| | | | | | | | - Anne B Meylan
- Florida Fish and Wildlife Conservation Commission, Fish and Wildlife Research Institute, St. Petersburg, FL, USA
- Smithsonian Tropical Research Institute, Washington, DC, USA
| | - Peter A Meylan
- Smithsonian Tropical Research Institute, Washington, DC, USA
- Natural Sciences Collegium, Eckerd College, St. Petersburg, FL, USA
| | | | - Robert Hardy
- Florida Fish and Wildlife Conservation Commission, Fish and Wildlife Research Institute, St. Petersburg, FL, USA
| | - Beth Brost
- Florida Fish and Wildlife Conservation Commission, Fish and Wildlife Research Institute, St. Petersburg, FL, USA
| | | | | | | | | | - Mike Dawson
- Geronimo Program, St. George's School, Newport, RI, USA
| | - Deborah Hayes
- Geronimo Program, St. George's School, Newport, RI, USA
| | | | | | - Sue Willis
- Sea Turtle Conservation Bonaire, Kralendijk, Bonaire, Dutch Caribbean
| | - Mabel Nava
- Sea Turtle Conservation Bonaire, Kralendijk, Bonaire, Dutch Caribbean
| | - Kristen M Hart
- U.S. Geological Survey, Wetland and Aquatic Research Center, Davie, FL, USA
| | - Michael S Cherkiss
- U.S. Geological Survey, Wetland and Aquatic Research Center, Davie, FL, USA
| | - Andrew G Crowder
- Cherokee Nation Technologies, NSU Center for Collaborative Research, Davie, FL, USA
| | - Clayton Pollock
- National Park Service, Christiansted, St. Croix, Virgin Islands
| | | | - Fernando A Muñoz Tenería
- Facultad de Agronomía y Veterinaria, Universidad Autónoma de San Luis Potosí, San Luis Potosí, México
| | | | | | - Armando Lorences
- Dirección de Ecología Municipio de Solidaridad, Quintana Roo, México
| | | | - Margaret M Lamont
- US Geological Survey, Wetland and Aquatic Research Center, Gainesville, FL, USA
| | - Allen M Foley
- Florida Fish and Wildlife Conservation Commission, Fish and Wildlife Research Institute, Jacksonville Field Laboratory, Jacksonville, FL, USA
| | - Rhonda Bailey
- Florida Fish and Wildlife Conservation Commission, Fish and Wildlife Research Institute, St. Petersburg, FL, USA
| | - Raymond R Carthy
- US Geological Survey, Florida Cooperative Fish and Wildlife Research Unit, Gainesville, FL, USA
| | - Russell Scarpino
- Florida Cooperative Fish and Wildlife Research Unit, Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, FL, USA
| | - Erin McMichael
- Florida Cooperative Fish and Wildlife Research Unit, Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, FL, USA
| | - Jane A Provancha
- Environmental Services, Integrated Mission Support Services, Kennedy Space Center, Florida, USA
| | | | | | | | | | | | | | | | | | | | - Jaime A Collazo
- U.S. Geological Survey, North Carolina Cooperative Fish and Wildlife Research Unit, Department of Applied Ecology, North Carolina State University, Raleigh, NC, USA
| | | | | | - Thomas B Stringell
- Centre for Ecology and Conservation, University of Exeter, Penryn, Cornwall, UK
| | | | | | - Annette C Broderick
- Centre for Ecology and Conservation, University of Exeter, Penryn, Cornwall, UK
| | - Quinton Phillips
- Department of Environment and Coastal Resources, National Environment Centre, Providenciales, Turks and Caicos Islands
| | - Marta Calosso
- The School for Field Studies, Center for Marine Resource Studies, South Caicos, Turks and Caicos Islands
| | - John A B Claydon
- Department of Environment and Coastal Resources, National Environment Centre, Providenciales, Turks and Caicos Islands
| | - Tasha L Metz
- Texas A&M University at Galveston, Galveston, TX, USA
| | - Amanda L Gordon
- Environmental Institute of Houston, University of Houston - Clear Lake, Houston, TX, USA
| | | | | | | | - Lucy Collyer
- Department of Environment, Grand Cayman, Cayman Islands
| | - Brendan J Godley
- Centre for Ecology and Conservation, University of Exeter, Penryn, Cornwall, UK
| | - Andrew McGowan
- Centre for Ecology and Conservation, University of Exeter, Penryn, Cornwall, UK
| | - Matthew J Witt
- Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall, UK
| | - Cathi L Campbell
- Archie Carr Center for Sea Turtle Research and Department of Biology, University of Florida, Gainesville, FL, USA
| | - Cynthia J Lagueux
- Archie Carr Center for Sea Turtle Research and Department of Biology, University of Florida, Gainesville, FL, USA
| | | | - Lory Kenyon
- Elbow Reef Lighthouse Society, Abaco, The Bahamas
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16
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Meier RE, Votier SC, Wynn RB, Guilford T, McMinn Grivé M, Rodríguez A, Newton J, Maurice L, Chouvelon T, Dessier A, Trueman CN. Tracking, feather moult and stable isotopes reveal foraging behaviour of a critically endangered seabird during the non-breeding season. DIVERS DISTRIB 2016. [DOI: 10.1111/ddi.12509] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Affiliation(s)
| | - Stephen C. Votier
- Environment and Sustainability Institute; University of Exeter; Penryn Campus Penryn, Cornwall TR10 9FE UK
| | - Russell B. Wynn
- National Oceanography Centre; European Way Southampton SO14 3ZH UK
| | - Tim Guilford
- Animal Behaviour Research Group; Department of Zoology; University of Oxford; The Tinbergen Building South Parks Road Oxford OX1 3PS UK
| | - Miguel McMinn Grivé
- Biogeografia, geodinàmica i sedimentació de la Mediterrània occidental (BIOGEOMED); Universitat de les Illes Balears; Cra. de Valldemossa, km 7.5 07122 Palma, Illes Balears Spain
| | - Ana Rodríguez
- Balearic Shearwater Conservation Association; Puig del Teide 4 - 315 Palmanova 07181, Illes Balears Spain
| | - Jason Newton
- NERC Life Sciences Mass Spectrometry Facility; Scottish Universities Environmental Research Centre; Scottish Enterprise Technology Park East Kilbride G75 0QF UK
| | - Louise Maurice
- British Geological Survey; Benson Lane Crowmarsh Gifford Oxfordshire OX10 8BB UK
| | - Tiphaine Chouvelon
- Littoral Environnement et Sociétés (LIENSs); UMR 7266; CNRS-Université de La Rochelle; 2 rue Olympe de Gouges 17042 La Rochelle Cedex 01 France
- IFREMER Unité Biogéochimie et Écotoxicologie (BE); Laboratoire de Biogéochimie des Contaminants Métalliques (LBCM); Rue de l'Ile d'Yeu 44311 Nantes 03 France
| | - Aurélie Dessier
- Littoral Environnement et Sociétés (LIENSs); UMR 7266; CNRS-Université de La Rochelle; 2 rue Olympe de Gouges 17042 La Rochelle Cedex 01 France
| | - Clive N. Trueman
- Ocean and Earth Science; University of Southampton Waterfront Campus; European Way; Southampton SO14 3ZH UK
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Chaalali A, Beaugrand G, Raybaud V, Lassalle G, Saint-Béat B, Le Loc’h F, Bopp L, Tecchio S, Safi G, Chifflet M, Lobry J, Niquil N. From species distributions to ecosystem structure and function: A methodological perspective. Ecol Modell 2016. [DOI: 10.1016/j.ecolmodel.2016.04.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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18
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Reid PC, Hari RE, Beaugrand G, Livingstone DM, Marty C, Straile D, Barichivich J, Goberville E, Adrian R, Aono Y, Brown R, Foster J, Groisman P, Hélaouët P, Hsu H, Kirby R, Knight J, Kraberg A, Li J, Lo T, Myneni RB, North RP, Pounds JA, Sparks T, Stübi R, Tian Y, Wiltshire KH, Xiao D, Zhu Z. Global impacts of the 1980s regime shift. GLOBAL CHANGE BIOLOGY 2016; 22:682-703. [PMID: 26598217 PMCID: PMC4738433 DOI: 10.1111/gcb.13106] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 09/03/2015] [Indexed: 05/21/2023]
Abstract
Despite evidence from a number of Earth systems that abrupt temporal changes known as regime shifts are important, their nature, scale and mechanisms remain poorly documented and understood. Applying principal component analysis, change-point analysis and a sequential t-test analysis of regime shifts to 72 time series, we confirm that the 1980s regime shift represented a major change in the Earth's biophysical systems from the upper atmosphere to the depths of the ocean and from the Arctic to the Antarctic, and occurred at slightly different times around the world. Using historical climate model simulations from the Coupled Model Intercomparison Project Phase 5 (CMIP5) and statistical modelling of historical temperatures, we then demonstrate that this event was triggered by rapid global warming from anthropogenic plus natural forcing, the latter associated with the recovery from the El Chichón volcanic eruption. The shift in temperature that occurred at this time is hypothesized as the main forcing for a cascade of abrupt environmental changes. Within the context of the last century or more, the 1980s event was unique in terms of its global scope and scale; our observed consequences imply that if unavoidable natural events such as major volcanic eruptions interact with anthropogenic warming unforeseen multiplier effects may occur.
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19
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Beaugrand G, Conversi A, Chiba S, Edwards M, Fonda-Umani S, Greene C, Mantua N, Otto SA, Reid PC, Stachura MM, Stemmann L, Sugisaki H. Synchronous marine pelagic regime shifts in the Northern Hemisphere. Philos Trans R Soc Lond B Biol Sci 2015; 370:20130272. [PMCID: PMC4247407 DOI: 10.1098/rstb.2013.0272] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023] Open
Abstract
Regime shifts are characterized by sudden, substantial and temporally persistent changes in the state of an ecosystem. They involve major biological modifications and often have important implications for exploited living resources. In this study, we examine whether regime shifts observed in 11 marine systems from two oceans and three regional seas in the Northern Hemisphere (NH) are synchronous, applying the same methodology to all. We primarily infer marine pelagic regime shifts from abrupt shifts in zooplankton assemblages, with the exception of the East Pacific where ecosystem changes are inferred from fish. Our analyses provide evidence for quasi-synchronicity of marine pelagic regime shifts both within and between ocean basins, although these shifts lie embedded within considerable regional variability at both year-to-year and lower-frequency time scales. In particular, a regime shift was detected in the late 1980s in many studied marine regions, although the exact year of the observed shift varied somewhat from one basin to another. Another regime shift was also identified in the mid- to late 1970s but concerned less marine regions. We subsequently analyse the main biological signals in relation to changes in NH temperature and pressure anomalies. The results suggest that the main factor synchronizing regime shifts on large scales is NH temperature; however, changes in atmospheric circulation also appear important. We propose that this quasi-synchronous shift could represent the variably lagged biological response in each ecosystem to a large-scale, NH change of the climatic system, involving both an increase in NH temperature and a strongly positive phase of the Arctic Oscillation. Further investigation is needed to determine the relative roles of changes in temperature and atmospheric pressure patterns and their resultant teleconnections in synchronizing regime shifts at large scales.
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Affiliation(s)
- G. Beaugrand
- Centre National de la Recherche Scientifique, Laboratoire d'Océanologie et de Géosciences’ UMR LOG CNRS 8187, Station Marine, Université des Sciences et Technologies de Lille 1, Lille 1 BP 80, Wimereux 62930, France
| | - A. Conversi
- Institute of Marine Sciences, National Research Council of Italy, Forte Santa Teresa, Loc Pozzuolo, Lerici, La Spezia 19032, Italy
- SAHFOS, Sir Alister Hardy Foundation for Ocean Science, The Laboratory, Citadel Hill, The Hoe, Plymouth PL1 2PB, UK
- Centre for Marine and Coastal Policy Research, Marine Institute, Plymouth University, Plymouth PL4 8AA, UK
| | - S. Chiba
- RIGC, JAMSTEC, 3173-25 Showa-machi, Kanazawa-ku, Yokohama 236-0001, Japan
| | - M. Edwards
- Institute of Marine Sciences, National Research Council of Italy, Forte Santa Teresa, Loc Pozzuolo, Lerici, La Spezia 19032, Italy
- SAHFOS, Sir Alister Hardy Foundation for Ocean Science, The Laboratory, Citadel Hill, The Hoe, Plymouth PL1 2PB, UK
| | - S. Fonda-Umani
- Department of Life Sciences, University of Trieste, v. Giorgieri, 10, Trieste, Italy
| | - C. Greene
- Ocean Resources and Ecosystems Program, Cornell University, Ithaca, NY, USA
| | - N. Mantua
- Southwest Fisheries Science Center, National Marine Fisheries Service, 110 Shaffer Road, Santa Cruz, CA 95060, USA
| | - S. A. Otto
- Stockholm Resilience Centre, Stockholm University, Kräftriket 2B, Stockholm 106 91, Sweden
- Institute for Hydrobiology and Fisheries Science, Center for Earth System Research and Sustainability (CEN), KlimaCampus, University of Hamburg, Grosse Elbstrasse 133, Hamburg 22767, Germany
| | - P. C. Reid
- SAHFOS, Sir Alister Hardy Foundation for Ocean Science, The Laboratory, Citadel Hill, The Hoe, Plymouth PL1 2PB, UK
- Centre for Marine and Coastal Policy Research, Marine Institute, Plymouth University, Plymouth PL4 8AA, UK
- Marine Biological Association of the UK, The Laboratory, Citadel Hill, Plymouth PL1 2PB, UK
| | - M. M. Stachura
- School of Aquatic and Fishery Sciences, University of Washington, Box 355020, Seattle, WA 98195, USA
| | - L. Stemmann
- LOV, Observatoire Océanologique de Villefranche-sur-Mer, Sorbonne Universités, UPMC Univ Paris 06, France
| | - H. Sugisaki
- Fisheries Research Agency, 2-3-3, Minatomirai, Nishi-ku, Yokohama, Japan
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Beaugrand G. Theoretical basis for predicting climate-induced abrupt shifts in the oceans. Philos Trans R Soc Lond B Biol Sci 2015; 370:20130264. [PMCID: PMC4247401 DOI: 10.1098/rstb.2013.0264] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023] Open
Abstract
Among the responses of marine species and their ecosystems to climate change, abrupt community shifts (ACSs), also called regime shifts, have often been observed. However, despite their effects for ecosystem functioning and both provisioning and regulating services, our understanding of the underlying mechanisms involved remains elusive. This paper proposes a theory showing that some ACSs originate from the interaction between climate-induced environmental changes and the species ecological niche. The theory predicts that a substantial stepwise shift in the thermal regime of a marine ecosystem leads indubitably to an ACS and explains why some species do not change during the phenomenon. It also explicates why the timing of ACSs may differ or why some studies may detect or not detect a shift in the same ecosystem, independently of the statistical method of detection and simply because they focus on different species or taxonomic groups. The present theory offers a way to predict future climate-induced community shifts and their potential associated trophic cascades and amplifications.
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21
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Jones AR, Wynn RB, Yésou P, Thébault L, Collins P, Suberg L, Lewis KM, Brereton TM. Using integrated land- and boat-based surveys to inform conservation of the Critically Endangered Balearic shearwater. ENDANGER SPECIES RES 2014. [DOI: 10.3354/esr00611] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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22
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Helaouët P, Beaugrand G, Edwards M. Understanding long-term changes in species abundance using a niche-based approach. PLoS One 2013; 8:e79186. [PMID: 24265757 PMCID: PMC3827165 DOI: 10.1371/journal.pone.0079186] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 09/24/2013] [Indexed: 11/18/2022] Open
Abstract
One of the major challenges to understanding population changes in ecology for assessment purposes is the difficulty in evaluating the suitability of an area for a given species. Here we used a new simple approach able to faithfully predict through time the abundance of two key zooplanktonic species by focusing on the relationship between the species’ environmental preferences and their observed abundances. The approach is applied to the marine copepods Calanus finmarchicus and C. helgolandicus as a case study characterising the multidecadal dynamics of the North Sea ecosystem. We removed all North Sea data from the Continuous Plankton Recorder (CPR) dataset and described for both species a simplified ecological niche using Sea Surface Temperature (SST) and CPR Phytoplankton Colour Index (PCI). We then modelled the dynamics of each species by associating the North Sea’s environmental parameters to the species’ ecological niches, thus creating a method to assess the suitability of this area. By using both C. finmarchicus and C. helgolandicus as indicators, the procedure reproduces the documented switches from cold to warm temperate states observed in the North Sea.
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Affiliation(s)
- Pierre Helaouët
- Sir Alister Hardy Foundation for Ocean Science, Plymouth, England
- * E-mail:
| | - Grégory Beaugrand
- Centre National de la Recherche Scientifique, Laboratoire d’Océanologie et de Géosciences’ UMR LOG CNRS 8187, Station Marine, Université des Sciences et Technologies de Lille – Lille Wimereux, France
| | - Martin Edwards
- Sir Alister Hardy Foundation for Ocean Science, Plymouth, England
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23
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Jaffré M, Beaugrand G, Goberville É, Jiguet F, Kjellén N, Troost G, Dubois PJ, Leprêtre A, Luczak C. Long-term phenological shifts in raptor migration and climate. PLoS One 2013; 8:e79112. [PMID: 24223888 PMCID: PMC3815123 DOI: 10.1371/journal.pone.0079112] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 09/26/2013] [Indexed: 11/25/2022] Open
Abstract
Climate change is having a discernible effect on many biological and ecological processes. Among observed changes, modifications in bird phenology have been widely documented. However, most studies have interpreted phenological shifts as gradual biological adjustments in response to the alteration of the thermal regime. Here we analysed a long-term dataset (1980-2010) of short-distance migratory raptors in five European regions. We revealed that the responses of these birds to climate-induced changes in autumn temperatures are abrupt and synchronous at a continental scale. We found that when the temperatures increased, birds delayed their mean passage date of autumn migration. Such delay, in addition to an earlier spring migration, suggests that a significant warming may induce an extension of the breeding-area residence time of migratory raptors, which may eventually lead to residency.
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Affiliation(s)
- Mikaël Jaffré
- Centre National de la Recherche Scientifique, Laboratoire d’Océanologie et de Géosciences UMR LOG CNRS 8187, Université Lille 1, Station Marine de Wimereux, Wimereux, France
- * E-mail:
| | - Grégory Beaugrand
- Centre National de la Recherche Scientifique, Laboratoire d’Océanologie et de Géosciences UMR LOG CNRS 8187, Université Lille 1, Station Marine de Wimereux, Wimereux, France
| | - Éric Goberville
- Centre National de la Recherche Scientifique, Laboratoire d’Océanologie et de Géosciences UMR LOG CNRS 8187, Université Lille 1, Station Marine de Wimereux, Wimereux, France
| | - Frédéric Jiguet
- Muséum National d’Histoire Naturelle, Centre de Recherches sur la Biologie des Populations d’Oiseaux, UMR MNHN-CNRS-UPMC 7204, Paris, France
| | - Nils Kjellén
- Department of Biology, University of Lund, Lund, Sweden
| | - Gerard Troost
- Trektellen.org, SOVON Dutch Centre for Field Ornithology, Nijmegen, The Netherlands
| | | | - Alain Leprêtre
- Université Lille 1, Écologie Numérique et Écotoxicologie, UPRES EA 4515, Villeneuve d’Ascq, France
| | - Christophe Luczak
- Centre National de la Recherche Scientifique, Laboratoire d’Océanologie et de Géosciences UMR LOG CNRS 8187, Université Lille 1, Station Marine de Wimereux, Wimereux, France
- Université d’Artois, IUFM, Gravelines, France
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24
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Luczak C, Beaugrand G, Lindley JA, Dewarumez JM, Dubois PJ, Kirby RR. Population dynamics in lesser black-backed gulls in the Netherlands support a North Sea regime shift. Biol Lett 2013; 9:20130127. [PMID: 23485878 PMCID: PMC3645047 DOI: 10.1098/rsbl.2013.0127] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Affiliation(s)
- C. Luczak
- Université d'Artois, IUFM, centre de Gravelines, 40, rue Victor Hugo, BP129, Gravelines 59820, France
- Centre National de la Recherche Scientifique, LOG UMR 8187, Université Lille 1, Wimereux, France
| | - G. Beaugrand
- Centre National de la Recherche Scientifique, LOG UMR 8187, Université Lille 1, Wimereux, France
| | - J. A. Lindley
- Sir Alister Hardy Foundation for Ocean Science, Plymouth, UK
| | - J.-M. Dewarumez
- Centre National de la Recherche Scientifique, LOG UMR 8187, Université Lille 1, Wimereux, France
| | - P. J. Dubois
- Centre National de la Recherche Scientifique, LOG UMR 8187, Université Lille 1, Wimereux, France
| | - R. R. Kirby
- Marine Institute, Plymouth University, Plymouth PL4 8AA, UK
- e-mail:
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25
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Frederiksen M, Anker-Nilssen T, Beaugrand G, Wanless S. Climate, copepods and seabirds in the boreal Northeast Atlantic - current state and future outlook. GLOBAL CHANGE BIOLOGY 2013; 19:364-372. [PMID: 23504776 DOI: 10.1111/gcb.12072] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Revised: 09/11/2012] [Accepted: 10/16/2012] [Indexed: 06/01/2023]
Abstract
The boreal Northeast Atlantic is strongly affected by current climate change, and large shifts in abundance and distribution of many organisms have been observed, including the dominant copepod Calanus finmarchicus, which supports the grazing food web and thus many fish populations. At the same time, large-scale declines have been observed in many piscivorous seabirds, which depend on abundant small pelagic fish. Here, we combine predictions from a niche model of C. finmarchicus with long-term data on seabird breeding success to link trophic levels. The niche model shows that environmental suitability for C. finmarchicus has declined in southern areas with large breeding seabird populations (e.g. the North Sea), and predicts that this decline is likely to spread northwards during the 21st century to affect populations in Iceland and the Faroes. In a North Sea colony, breeding success of three common piscivorous seabird species [black-legged kittiwake (Rissa tridactyla), common guillemot (Uria aalge) and Atlantic puffin (Fratercula arctica)] was strongly positively correlated with local environmental suitability for C. finmarchicus, whereas this was not the case at a more northerly colony in west Norway. Large seabird populations seem only to occur where C. finmarchicus is abundant, and northward distributional shifts of common boreal seabirds are therefore expected over the coming decades. Whether or not population size can be maintained depends on the dispersal ability and inclination of these colonial breeders, and on the carrying capacity of more northerly areas in a warmer climate.
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Ramos R, Granadeiro JP, Nevoux M, Mougin JL, Dias MP, Catry P. Combined spatio-temporal impacts of climate and longline fisheries on the survival of a trans-equatorial marine migrant. PLoS One 2012; 7:e40822. [PMID: 22815833 PMCID: PMC3397926 DOI: 10.1371/journal.pone.0040822] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Accepted: 06/13/2012] [Indexed: 11/20/2022] Open
Abstract
Predicting the impact of human activities and their derivable consequences, such as global warming or direct wildlife mortality, is increasingly relevant in our changing world. Due to their particular life history traits, long-lived migrants are amongst the most endangered and sensitive group of animals to these harming effects. Our ability to identify and quantify such anthropogenic threats in both breeding and wintering grounds is, therefore, of key importance in the field of conservation biology. Using long-term capture-recapture data (34 years, 4557 individuals) and year-round tracking data (4 years, 100 individuals) of a trans-equatorial migrant, the Cory's shearwater (Calonectris diomedea), we investigated the impact of longline fisheries and climatic variables in both breeding and wintering areas on the most important demographic trait of this seabird, i.e. adult survival. Annual adult survival probability was estimated at 0.914±0.022 on average, declining throughout 1978-1999 but recovering during the last decade (2005-2011). Our results suggest that both the incidental bycatch associated with longline fisheries and high sea surface temperatures (indirectly linked to food availability; SST) increased mortality rates during the long breeding season (March-October). Shearwater survival was also negatively affected during the short non-breeding season (December-February) by positive episodes of the Southern Oscillation Index (SOI). Indirect negative effects of climate at both breeding (SST) and wintering grounds (SOI) had a greater impact on survival than longliner activity, and indeed these climatic factors are those which are expected to present more unfavourable trends in the future. Our work underlines the importance of considering both breeding and wintering habitats as well as precise schedules/phenology when assessing the global role of the local impacts on the dynamics of migratory species.
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Affiliation(s)
- Raül Ramos
- Eco-Ethology Research Unit, Instituto Superior de Psicologia Aplicada, Lisboa, Portugal.
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Luczak C, Beaugrand G, Lindley JA, Dewarumez JM, Dubois PJ, Kirby RR. North Sea ecosystem change from swimming crabs to seagulls. Biol Lett 2012; 8:821-4. [PMID: 22764111 PMCID: PMC3441004 DOI: 10.1098/rsbl.2012.0474] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A recent increase in sea temperature has established a new ecosystem dynamic regime in the North Sea. Climate-induced changes in decapods have played an important role. Here, we reveal a coincident increase in the abundance of swimming crabs and lesser black-backed gull colonies in the North Sea, both in time and in space. Swimming crabs are an important food source for lesser black-backed gulls during the breeding season. Inhabiting the land, but feeding mainly at sea, lesser black-backed gulls provide a link between marine and terrestrial ecosystems, since the bottom-up influence of allochthonous nutrient input from seabirds to coastal soils can structure the terrestrial food web. We, therefore, suggest that climate-driven changes in trophic interactions in the marine food web may also have ensuing ramifications for the coastal ecology of the North Sea.
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Affiliation(s)
- C Luczak
- Centre National de la Recherche Scientifique, LOG UMR 8187, Université Lille 1, France
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Luczak C, Spilmont N. Are the Eastern and Western Basins of the English Channel two separate ecosystems? Get back in line with some cautionary comments. MARINE POLLUTION BULLETIN 2012; 64:1318-1319. [PMID: 22704144 DOI: 10.1016/j.marpolbul.2012.05.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Accepted: 05/08/2012] [Indexed: 06/01/2023]
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Geolocators reveal migration and pre-breeding behaviour of the critically endangered Balearic Shearwater Puffinus mauretanicus. PLoS One 2012; 7:e33753. [PMID: 22470471 PMCID: PMC3312344 DOI: 10.1371/journal.pone.0033753] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Accepted: 02/21/2012] [Indexed: 11/19/2022] Open
Abstract
Using combined miniature archival light and salt-water immersion loggers, we characterise the year-round individual at-sea movements of Europe's only critically endangered seabird, the Balearic shearwater Puffinus mauretanicus, for the first time. Focusing on the non-breeding period, we show that all of the 26 breeding birds tracked from their breeding site on Mallorca in the Mediterranean Sea successfully made a 2-4 month migration into the Atlantic Ocean, where they utilised well-defined core areas off Portuguese and French coasts. As well as identifying high-risk areas in the Atlantic, our results confirm that breeding birds spend most of the year concentrated around productive waters of the Iberian shelf in the western Mediterranean. Migration phenology appeared largely unrelated to the subsequent (distinctly synchronous) breeding attempt, suggesting that any carry-over effects were compensated for during a long pre-laying period spent over winter in the Mediterranean. Using the light and salt-water immersion data alone we were also able to characterise the pattern of pre-laying visits to the colony in considerable detail, demonstrating that breeding pairs appear to coordinate their over-day visits using a high frequency of night-time visits throughout the winter. Our study shows that geolocation technology is a valuable tool for assessing the spatial distribution of risks to this critically endangered species, and also provides a low-impact method for remotely observing the detailed behaviour of seabird species that may be sensitive to disturbance from traditional study methods.
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