@article {9473, title = {Seasonal lipid dynamics of four Arctic bivalves: Implications for their physiological capacities to cope with future changes in coastal ecosystemsAbstract}, journal = {Ecology and Evolution}, volume = {13}, year = {2023}, month = {Jan-11-2023}, abstract = {The Arctic is exposed to unprecedented warming, at least three times higher than the global average, which induces significant melting of the cryosphere. Freshwater inputs from melting glaciers will subsequently affect coastal primary production and organic matter quality. However, due to a lack of basic knowledge on the physiology of Arctic organisms, it remains difficult to understand how these future trophic changes will threaten the long-term survival of benthic species in coastal habitats. This study aimed to gain new insights into the seasonal lipid dynamics of four dominant benthic bivalves (Astarte moerchi, Hiatella arctica, Musculus discors, and Mya truncata) collected before and after sea ice break-up in a high-Arctic fjord (Young Sound, NE Greenland). Total lipid content and fatty acid composition of digestive gland neutral lipids were analyzed to assess bivalve energy reserves while the fatty acid composition of gill polar lipids was determined as a biochemical indicator of interspecies variations in metabolic activity and temperature acclimation. Results showed a decrease in lipid reserves between May and August, suggesting that bivalves have only limited access to fresh organic matter until sea ice break-up. The lack of seasonal variation in the fatty acid composition of neutral lipids, especially essential ω3 fatty acids, indicates that no fatty acid transfer from the digestive glands to the gonads occurs between May and August, and therefore, no reproductive investment takes place during this period. Large interspecies differences in gill fatty acid composition were observed, which appear to be related to differences in species life span and metabolic strategies. Such differences in gill fatty acid composition of polar lipids, which generally influence metabolic rates and energy needs, may imply that not all benthic species will be equally sensitive to future changes in primary production and organic matter quality in Arctic coastal habitats.}, keywords = {Arctic coastal ecosystems, Bivalve, Climate Change, energy reserves, fatty acids, homeoviscous adaptation, meltwater inputs, metabolic rate depression}, issn = {2045-7758}, doi = {10.1002/ece3.v13.1110.1002/ece3.10691}, url = {https://onlinelibrary.wiley.com/toc/20457758/13/11}, author = {Bridier, Guillaume and Olivier, Fr{\'e}d{\'e}ric and Grall, Jacques and Chauvaud, Laurent and Sejr, Mikael K. and Tremblay, Rejean} } @article {7469, title = {Highly variable taxa-specific coral bleaching responses to thermal stresses}, journal = {Marine Ecology Progress Series}, volume = {648}, year = {2020}, month = {27-08-2020}, pages = {135 - 151}, abstract = {Complex histories of chronic and acute sea surface temperature (SST) stresses are expected to trigger taxon- and location-specific responses that will ultimately lead to novel coral communities. The 2016 El Ni{\~n}o-Southern Oscillation provided an opportunity to examine largescale and recent environmental histories on emerging patterns in 226 coral communities distributed across 12 countries from East Africa to Fiji. Six main coral communities were identified that largely varied across a gradient of Acropora to massive Porites dominance. Bleaching intensity was taxon-specific and was associated with complex interactions among the 20 environmental variables that we examined. Coral community structure was better aligned with the historical temperature patterns between 1985 and 2015 than the 2016 extreme temperature event. Additionally, bleaching responses observed during 2016 differed from historical reports during past warm years. Consequently, coral communities present in 2016 are likely to have been reorganized by both long-term community change and acclimation mechanisms. For example, less disturbed sites with cooler baseline temperatures, higher mean historical SST background variability, and infrequent extreme warm temperature stresses were associated with Acropora-dominated communities, while more disturbed sites with lower historical SST background variability and frequent acute warm stress were dominated by stress-resistant massive Porites corals. Overall, the combination of taxon-specific responses, community-level reorganization over time, geographic variation, and multiple environmental stressors suggest complex responses and a diversity of future coral communities that can help contextualize management priorities and activities.}, keywords = {acclimation, Adaptation, Climate Change, community structure, Geography, Stress responses}, issn = {0171-8630}, doi = {10.3354/meps13402}, url = {https://www.int-res.com/abstracts/meps/v648/p135-151/}, author = {McClanahan, T.R. and Darling, E.S. and Maina, J.M. and Muthiga, NA and D{\textquoteright}agata, S. and Leblond, J. and Arthur, R. and Jupiter, S.D. and Wilson, S.K. and Mangubhai, S. and Ussi, A.M. and Mireille M.M. Guillaume and Humphries, A.T. and Patankar, V. and Shedrawi, G. and Pagu, J. and Grimsditch, G.} } @article {7092, title = {An open-source framework to model present and future marine species distributions at local scale}, journal = {Ecological Informatics}, volume = {59}, year = {2020}, abstract = {Species Distribution Models (SDMs) are useful tools to project potential future species distributions under climate change scenarios. Despite the ability to run SDMs in recent and reliable tools, there are some misuses and proxies that are widely practiced and rarely addressed together, particularly when dealing with marine species. In this paper, we propose an open-source framework that includes (i) a procedure for homogenizing occurrence data to reduce the influence of sampling bias, (ii) a procedure for generating pseudo-absences, (iii) a hierarchical-filter approach, (iv) full incorporation of the third dimension by considering climatic variables at multiple depths and (v) building of maps that predict current and potential future ranges of marine species. This framework is available for non-modeller ecologists interested in investigating future species ranges with a user-friendly script. We investigated the robustness of the framework by applying it to marine species of the Eastern English Channel. Projections were built for the middle and the end of this century under RCP2.6 and RCP8.5 scenarios. {\textcopyright} 2020 Elsevier B.V.}, keywords = {Climate Change, ecological modeling, English Channel, filter, future prospect, hierarchical system, marine ecosystem, sampling, scenario analysis, species diversity}, issn = {15749541}, doi = {10.1016/j.ecoinf.2020.101130}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086876945\&doi=10.1016\%2fj.ecoinf.2020.101130\&partnerID=40\&md5=0a5c308eac10a69880027d5de2e6fe98}, author = {Ben Rais Lasram, F. and Hattab, T. and Nogues, Quentin and Beaugrand, G. and Dauvin, J.C. and Halouani, G. and Le Loc{\textquoteright}h, F. and Nathalie Niquil and Leroy, B.} } @article {5816, title = {{Uncertainties in the projection of species distributions related to general circulation models}}, journal = {Ecology and Evolution}, volume = {5}, year = {2015}, abstract = {

{\textcopyright} 2015 The Authors. Ecological Niche Models (ENMs) are increasingly used by ecologists to project species potential future distribution. However the application of such models may be challenging and some caveats have already been identified. While studies have generally shown that projections may be sensitive to the ENM applied or the emission scenario to name just a few the sensitivity of ENM-based scenarios to General Circulation Models (GCMs) has been often underappreciated. Here using a multi-GCM and multi-emission scenario approach we evaluated the variability in projected distributions under future climate conditions. We modeled the ecological realized niche (sensu Hutchinson) and predicted the baseline distribution of species with contrasting spatial patterns and representative of two major functional groups of European trees: the dwarf birch and the sweet chestnut. Their future distributions were then projected onto future climatic conditions derived from seven GCMs and four emissions scenarios using the new Representative Concentration Pathways (RCPs) developed for the Intergovernmental Panel on Climate Change (IPCC) AR5 report. Uncertainties arising from GCMs and those resulting from emissions scenarios were quantified and compared. Our study reveals that scenarios of future species distribution exhibit broad differences depending not only on emissions scenarios but also on GCMs. We found that the between-GCM variability was greater than the between-RCP variability for the next decades and both types of variability reached a similar level at the end of this century. Our result highlights that a combined multi-GCM and multi-RCP approach is needed to better consider potential trajectories and uncertainties in future species distributions. In all cases between-GCM variability increases with the level of warming and if nothing is done to alleviate global warming future species spatial distribution may become more and more difficult to anticipate. When future species spatial distributions are examined we propose to use a large number of GCMs and RCPs to better anticipate potential trajectories and quantify uncertainties.

}, keywords = {Biogeography, Climate Change, Ecological niche modeling, Global change models, Species distribution projections, Uncertainties}, issn = {20457758}, doi = {10.1002/ece3.1411}, author = {Goberville, Eric and Gr{\'e}gory Beaugrand and Nina-Coralie Hautek{\`e}ete and Yves Piquot and Christophe Luczak} } @article {5820, title = {{Synchronous response of marine plankton ecosystems to climate in the Northeast Atlantic and the North Sea}}, journal = {Journal of Marine Systems}, volume = {129}, year = {2014}, pages = {189{\textendash}202}, abstract = {

Over the last few decades, global warming has accelerated both the rate and magnitude of changes observed in many functional units of the Earth System. In this context, plankton are sentinel organisms because they are sensitive to subtle levels of changes in temperature and might help in identifying the current effects of climate change on pelagic ecosystems. In this paper, we performed a comparative approach in two regions of the North Atlantic (i.e. the Northeast Atlantic and the North Sea) to explore the relationships between changes in marine plankton, the regional physico-chemical environment and large-scale hydro-climatic forcing using four key indices: the North Atlantic Oscillation (NAO), the Atlantic Multidecadal Oscillation (AMO), the East Atlantic (EA) pattern and Northern Hemisphere Temperature (NHT) anomalies. Our analyses suggest that long-term changes in the states of the two ecosystems were synchronous and correlated to the same large-scale hydro-climatic variables: NHT anomalies, the AMO and to a lesser extent the EA pattern. No significant correlation was found between long-term ecosystem modifications and the state of the NAO. Our results suggest that the effect of climate on these ecosystems has mainly occurred in both regions through the modulation of the thermal regime. {\textcopyright} 2013 Elsevier B.V.

}, keywords = {Climate Change, Large-scale hydro-climatic indices, Long-term changes, North Atlantic, Phytoplankton, Zooplankton}, author = {Goberville, Eric and Gr{\'e}gory Beaugrand and Martin Edwards} } @article {5828, title = {{Evaluation of coastal perturbations: A new mathematical procedure to detect changes in the reference state of coastal systems}}, journal = {Ecological Indicators}, volume = {11}, year = {2011}, pages = {1290{\textendash}1300}, abstract = {

The pressure exerted by human activities on living systems has become so intense that it is inspiring the inception of a global network of monitoring of the biosphere and the use of robust statistical procedures to detect potential changes. Here, we propose a new multivariate non-parametric procedure, based on the Mahalanobis generalised distance and a simplification of the multiple response permutation procedure to identify rapidly changes in any natural systems. The procedure can be virtually coupled on all monitoring programmes and is not influenced by missing data, a common feature found in many ecological databases. In France, physical, chemical and biological variability of coastal waters have been monitored since 1997 by the SOMLIT Network. Applied to this data set, this technique enabled a first quantification of the impacts of human disturbance through changes in the concentration of nutrients. Our results revealed how climate may interact with anthropogenic pressure to alter coastal marine systems and suggest a synergism between nutrient enrichment, human activities and local climatic conditions. Indeed some effects of climate (e.g. insolation duration - increase in duration of daylight) may attenuate the fertility of coastal systems, while some others (e.g. precipitation) amplify the human signals. {\textcopyright} 2011 Elsevier Ltd.

}, keywords = {Anthropogenic nutrient enrichment, Climate Change, Coastal systems, Monitoring, SOMLIT}, issn = {1470160X}, author = {Goberville, Eric and Gr{\'e}gory Beaugrand and Benoit Sautour and Paul Tr{\'e}guer} }