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Auteur Oikonomou, A.; Leprieur, F.; Leonardos, I.D.
Titre Biogeography of freshwater fishes of the Balkan Peninsula Type Article scientifique
Année 2014 Publication Revue Abrégée Hydrobiologia
Volume (down) 738 Numéro 1 Pages 205-220
Mots-Clés Balkan Peninsula; Beta diversity; Bioregionalisation; Conservation biogeography; Vulnerability; ancient lakes; biodiversity conservation; endemism; freshwater fish; global patterns; mitochondrial-dna sequences; north-america; phylogeography; species richness
Résumé Delineating biogeographical regions is a critical step towards the establishment and evaluation of conservation priorities. In the present study, we analysed the distribution patterns of the freshwater fish of an understudied European biodiversity hotspot, the Balkan Peninsula. Based on the most extensive available database of native freshwater fish species distributions, we performed a hierarchical clustering analysis to identify the major biogeographical regions of the Balkan Peninsula. We also highlighted the 'hottest hotspots' of freshwater fish diversity across the delimited biogeographical regions by describing the patterns of species richness, endemic and vulnerable species; indicator species were also determined. The bioregionalisation scheme consisted of eight groups of drainage basins that correspond to distinct regions of the Balkan Peninsula. Overall, the delineated biogeographical regions varied in terms of species richness, endemism, vulnerability (i.e. extinction threats) and indicator species composition. From a conservation perspective, this study emphasises the prioritisation of areas characterised by high levels of irreplaceability (endemism) and vulnerability (i.e. the Attikobeotia region, Ionian Sea and Prespa Lakes) and stresses the necessity of implementing a network of protected freshwater areas across the Balkan Peninsula.
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ISSN 0018-8158 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 454
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Auteur Charmantier, G.; Anger, K.
Titre Ontogeny of osmoregulatory patterns in the South American shrimp Macrobrachium amazonicum: Loss of hypo-regulation in a land-locked population indicates phylogenetic separation from estuarine ancestors Type Article scientifique
Année 2011 Publication Revue Abrégée Journal of Experimental Marine Biology and Ecology
Volume (down) 396 Numéro 2 Pages 89-98
Mots-Clés Biogeography; Crustacea; Life-history adaptations; Osmoregulation; ontogeny; speciation
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ISSN 0022-0981 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 757
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Auteur Péron, C.; Gremillet, D.; Prudor, A.; Pettex, E.; Saraux, C.; Soriano-Redondo, A.; Authier, M.; Fort, J.
Titre Importance of coastal Marine Protected Areas for the conservation of pelagic seabirds: The case of Vulnerable yelkouan shearwaters in the Mediterranean Sea Type Article scientifique
Année 2013 Publication Revue Abrégée Biological Conservation
Volume (down) 168 Numéro Pages 210-221
Mots-Clés Aerial surveys; At-sea observations; Biotelemetry; Conservation biogeography; Spatial planning; Stable isotope analysis
Résumé Marine Protected Areas (MPAs) are being established across all marine regions but their validity for the conservation of highly mobile marine vertebrates has been questioned. We tested the hypothesis that French coastal MPAs primarily designed for coastal and benthic biota are also beneficial for the conservation of a pelagic seabird, the Vulnerable yelkouan shearwater (Puffinus yelkouan), an endemic species to the Mediterranean Sea. We used a vast spectrum of electronic devices (GPS, temperature-depth-recorders, satellite transmitters and geolocators) and stable isotopic analyses to study the year-round movements and the trophic status of yelkouan shearwaters from the Hyères archipelago (France). In addition we conducted large-scale ship and aircrafts observation surveys to investigate spatio-temporal density patterns of shearwaters (genus Puffinus) in the western Mediterranean Sea. This extensive investigation permitted the first comprehensive study of the at-sea ecology of yelkouan shearwaters showing strikingly coastal habits, partial migration, unsuspected diving capabilities (max dive depth of 30 m), and a broad diet ranging from zooplankton to small pelagic fish. Importantly, 31% of yelkouan shearwaters GPS positions associated with foraging, 38% of diving positions, and 27% of resting positions were within the three French MPAs during the breeding season. These high scores confirmed by year-round distribution derived from GLS, PTTs, at-sea and aerial observations, validated our hypothesis of the major importance of coastal MPAs for the conservation of yelkouan shearwater. Our case-study is therefore a major contribution to research efforts aiming at linking the spatial ecology of highly mobile marine vertebrates with effective conservation of marine biodiversity.
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ISSN 0006-3207 ISBN Médium
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Notes The following values have no corresponding Zotero field:<br/>Author Address: CEFE-CNRS, UMR5175, 1919 route de Mende, 34293 Montpellier, France<br/>Author Address: University of Cape Town, FitzPatrick Institute, DST-NRF Centre of Excellence , Rondebosch 7701, South Africa<br/>Author Address: Université de La Rochelle,CNRS,Observatoire PELAGIS, Systèmes d’Observation pour la Conservation des Mammifères et des Oiseaux Marins, UMS 3462, Pôle Analytique, 5 allées de l’Océan, 17000 La Rochelle, France<br/>Author Address: IFREMER, (Institut Français de Recherche pour l’Exploitation de la Mer) UMR 212 EME, Sète, France<br/>Author Address: Aarhus University, Department of Bioscience, Frederiksborgvej 399, 4000 Roskilde, Denmark<br/>PB – Elsevier<br/> Approuvé pas de
Numéro d'Appel LL @ pixluser @ collection 285
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Auteur Demarcq, H.; Reygondeau, G.; Alvain, S.; Vantrepotte, V.
Titre Monitoring marine phytoplankton seasonality from space Type Article scientifique
Année 2012 Publication Revue Abrégée Remote Sensing of Environment
Volume (down) 117 Numéro Pages 211-222
Mots-Clés Biogeography; Phytoplankton; Phytoplankton Functional; remote sensing; seasonality; Seasonal parameters; Surface chlorophyll concentration; Types; Wavelet transform
Résumé Remote sensing techniques are used to study the large scale patterns related to the seasonal modes of variability of the marine phytoplankton. Ten years of monthly composite maps of sea surface chlorophyll-a concentration and the PHYSAT database of four Phytoplanktonic Functional Types (PFTs), both from SeaWiFS, are used to investigate characteristics of phytoplankton seasonality in the trades and westerlies wind oceanic biomes, where data density is adequate. We use a combination of wavelet transform and statistical techniques that allow us to quantify both intensity and duration of the seasonal oscillation of chlorophyll-a concentration and PFTs relative occurrence, and to map these relationships. Next, the seasonal oscillations detected are related to four PFTs revealing six major global phytoplanktonic associations. Our results elucidate the intensity and duration of the seasonal dynamic of the chlorophyll-a concentration and of the relative occurrence of four PFTs at a global scale. Thus, the typology of the different types of seasonality is investigated. Finally, an overall agreement between the results and the biogeochemical provinces partition proposed by Longhurst is found, revealing a strong environmental control on the seasonal oscillation of primary producers and a clear latitudinal organization in the succession of the phytoplankton types. Results provided in this study quantify the seasonal oscillation of key structural parameters of the global ocean, and their potential implications for our understanding of ecosystem dynamics.
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ISSN 0034-4257 ISBN Médium
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Numéro d'Appel LL @ pixluser @ collection 182
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Auteur Reynolds, P.L.; Stachowicz, J.J.; Hovel, K.; Bostrom, C.; Boyer, K.; Cusson, M.; Eklof, J.S.; Engel, F.G.; Engelen, A.H.; Eriksson, B.K.; Fodrie, F.J.; Griffin, J.N.; Hereu, C.M.; Hori, M.; Hanley, T.C.; Ivanov, M.; Jorgensen, P.; Kruschel, C.; Lee, K.-S.; McGlathery, K.; Moksnes, P.-O.; Nakaoka, M.; O'Connor, M.I.; O'Connor, N.E.; Orth, R.J.; Rossi, F.; Ruesink, J.; Sotka, E.E.; Thormar, J.; Tomas, F.; Unsworth, R.K.F.; Whalen, M.A.; Duffy, J.E.
Titre Latitude, temperature, and habitat complexity predict predation pressure in eelgrass beds across the Northern Hemisphere Type Article scientifique
Année 2018 Publication Revue Abrégée Ecology
Volume (down) 99 Numéro 1 Pages 29-35
Mots-Clés patterns; communities; diversity; ecosystems; temperature; seagrasses; eutrophication; predation; biogeography; prey; top-down control; enrichment; latitude; mesograzer; seagrass; species interactions; water temperature; Zostera
Résumé Latitudinal gradients in species interactions are widely cited as potential causes or consequences of global patterns of biodiversity. However, mechanistic studies documenting changes in interactions across broad geographic ranges are limited. We surveyed predation intensity on common prey (live amphipods and gastropods) in communities of eelgrass (Zostera marina) at 48 sites across its Northern Hemisphere range, encompassing over 37 degrees of latitude and four continental coastlines. Predation on amphipods declined with latitude on all coasts but declined more strongly along western ocean margins where temperature gradients are steeper. Whereas insitu water temperature at the time of the experiments was uncorrelated with predation, mean annual temperature strongly positively predicted predation, suggesting a more complex mechanism than simply increased metabolic activity at the time of predation. This large-scale biogeographic pattern was modified by local habitat characteristics; predation declined with higher shoot density both among and within sites. Predation rates on gastropods, by contrast, were uniformly low and varied little among sites. The high replication and geographic extent of our study not only provides additional evidence to support biogeographic variation in predation intensity, but also insight into the mechanisms that relate temperature and biogeographic gradients in species interactions.
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ISSN 0012-9658 ISBN Médium
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Numéro d'Appel MARBEC @ alain.herve @ collection 2254
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