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| Registros recuperados: 66 | |
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| Juhel, Jean-baptiste; Vigliola, Laurent; Wantiez, Laurent; Letessier, Tom B.; Meeuwig, Jessica J.; Mouillot, David. |
| Reef sharks are vulnerable predators experiencing severe population declines mainly due to overexploitation. However, beyond direct exploitation, human activities can produce indirect or sub-lethal effects such as behavioral alterations. Such alterations are well known for terrestrial fauna but poorly documented for marine species. Using an extensive sampling of 367 stereo baited underwater videos systems, we show modifications in grey reef shark (Carcharhinus amblyrhynchos) occurrence and feeding behavior along a marked gradient of isolation from humans across the New Caledonian archipelago (South-Western Pacific). The probability of occurrence decreased by 68.9% between wilderness areas (more than 25 hours travel time from the capital city) and impacted... |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00483/59500/62369.pdf |
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| Mclean, Matthew; Auber, Arnaud; Graham, Nicholas A J; Houk, Peter; Villéger, Sébastien; Violle, Cyrille; Thuiller, Wilfried; Wilson, Shaun K.; Mouillot, David. |
| ‘Functional’ diversity is believed to influence ecosystem dynamics through links between organismal traits and ecosystem processes. Theory predicts that key traits and high trait redundancy – large species richness and abundance supporting the same traits – can buffer communities against environmental disturbances. While experiments and data from simple ecological systems lend support, large‐scale evidence from diverse, natural systems under major disturbance is lacking. Here, using long‐term data from both temperate (English Channel) and tropical (Seychelles Islands) fishes, we show that sensitivity to disturbance depends on communities’ initial trait structure and initial trait redundancy. In both ecosystems, we found that increasing dominance by... |
| Tipo: Text |
Palavras-chave: Climate change; Coral reefs; Diversity stability; Ecological traits; Ecosystem functioning; English Channel; Functional diversity. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00490/60184/63525.pdf |
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| Albouy, Camille; Delattre, Valentine; Donati, Giulia; Frölicher, Thomas L.; Albouy-boyer, Severine; Rufino, Marta; Pellissier, Loïc; Mouillot, David; Leprieur, Fabien. |
| Although extinctions due to climate change are still uncommon, they might surpass those caused by habitat loss or overexploitation over the next few decades. Among marine megafauna, mammals fulfill key and irreplaceable ecological roles in the ocean, and the collapse of their populations may therefore have irreversible consequences for ecosystem functioning and services. Using a trait-based approach, we assessed the vulnerability of all marine mammals to global warming under high and low greenhouse gas emission scenarios for the middle and the end of the 21st century. We showed that the North Pacific Ocean, the Greenland Sea and the Barents Sea host the species that are most vulnerable to global warming. Future conservation plans should therefore focus on... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00606/71791/70280.pdf |
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| Escalas, Arthur; Bouvier, Thierry; Mouchet, Maud A.; Leprieur, Fabien; Bouvier, Corinne; Troussellier, Marc; Mouillot, David. |
| Recent developments of molecular tools have revolutionized our knowledge of microbial biodiversity by allowing detailed exploration of its different facets and generating unprecedented amount of data. One key issue with such large datasets is the development of diversity measures that cope with different data outputs and allow comparison of biodiversity across different scales. Diversity has indeed three components: local (), regional () and the overall difference between local communities (). Current measures of microbial diversity, derived from several approaches, provide complementary but different views. They only capture the component of diversity, compare communities in a pairwise way, consider all species as equivalent or lack a mathematically... |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00163/27441/25668.pdf |
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| Rocklin, Delphine; Tomasini, Jean-antoine; Culioli, Jean-michel; Pelletier, Dominique; Mouillot, David. |
| The development of fishing efficiency coupled with an increase of fishing effort led to the overexploitation of numerous natural marine resources. In addition to this commercial pressure, the impact of recreational activities on fish assemblages remains barely known. Here we examined the impact of spearfishing limitation on resources in a marine protected area (MPA) and the benefit it provides for the local artisanal fishery through the use of a novel indicator. We analysed trends in the fish assemblage composition using artisanal fisheries data collected in the Bonifacio Strait Natural Reserve (BSNR), a Mediterranean MPA where the spearfishing activity has been forbidden over 15% of its area. Fish species were pooled into three response groups according... |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00048/15914/13343.pdf |
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| Juhel, Jean-baptiste; Utama, Rizkie S.; Marques, Virginie; Vimono, Indra B.; Sugeha, Hagi Yulia; Kadarusman,; Pouyaud, Laurent; Dejean, Tony; Mouillot, David; Hocdé, Régis. |
| Environmental DNA (eDNA) has the potential to provide more comprehensive biodiversity assessments, particularly for vertebrates in species-rich regions. However, this method requires the completeness of a reference database (i.e. a list of DNA sequences attached to each species), which is not currently achieved for many taxa and ecosystems. As an alternative, a range of operational taxonomic units (OTUs) can be extracted from eDNA metabarcoding. However, the extent to which the diversity of OTUs provided by a limited eDNA sampling effort can predict regional species diversity is unknown. Here, by modelling OTU accumulation curves of eDNA seawater samples across the Coral Triangle, we obtained an asymptote reaching 1531 fish OTUs, while 1611 fish species... |
| Tipo: Text |
Palavras-chave: EDNA metabarcoding; Sequence clustering; Operational Taxonomic Unit; Diversity assessment; Detectability. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00640/75232/79601.pdf |
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| Rocklin, Delphine; Santoni, Marie-catherine; Culioli, Jean-michel; Tomasini, Jean-antoine; Pelletier, Dominique; Mouillot, David. |
| There is increasing evidence from previous studies, and from fishers' observations, that coastal dolphins use fishing nets as an easily accessible feeding source, damaging or depredating fish caught in the nets. This study investigates the impact of dolphin depredation on artisanal trammelnets by analysing the catch composition of 614 artisanal fishing operations in the Bonifacio Strait Natural Reserve (France). Common bottlenose dolphins (Tursiops truncatus) attacked, on average, 12.4% of the nets and damaged 8.3% of the catch. However, attacked nets were characterized by statistically significantly higher catch per unit effort than unattacked ones. Catch composition also differed significantly after dolphin attacks; bentho-pelagic fish were more... |
| Tipo: Text |
Palavras-chave: Marine protected area; Interactions with fisheries; Depredation; Catch per unit effort; Catch composition; Bottlenose dolphin; Artisanal fisheries. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6808.pdf |
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| Andrello, Marco; Mouillot, David; Somot, Samuel; Thuiller, Wilfried; Manel, Stephanie. |
| AimTo study the combined effects of climate change on connectivity between marine protected areas (MPAs) and larval supply to the continental shelf. LocationThe Mediterranean Sea, where sea surface temperatures are expected to strongly increase by the end of the 21st century, represents an archetypal situation with a dense MPA network but resource overexploitation outside. MethodsUsing an individual-based mechanistic model of larval transport, forced with an emission-driven regional climate change scenario for the Mediterranean Sea, we explored the combined effects of changes in hydrodynamics, adult reproductive timing and larval dispersal on the connectivity among MPAs and their ability to seed fished areas with larvae. ResultsWe show that, over the... |
| Tipo: Text |
Palavras-chave: Biophysical model; Conservation planning; Epinephelus marginatus; Larval dispersal; Larval growth rate; Reproductive timing. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00627/73867/73398.pdf |
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| D'Agata, Stephanie; Mouillot, David; Wantiez, Laurent; Friedlander, Alan M.; Kulbicki, Michel; Vigliola, Laurent. |
| Although marine reserves represent one of the most effective management responses to human impacts, their capacity to sustain the same diversity of species, functional roles and biomass of reef fishes as wilderness areas remains questionable, in particular in regions with deep and long-lasting human footprints. Here we show that fish functional diversity and biomass of top predators are significantly higher on coral reefs located at more than 20 h travel time from the main market compared with even the oldest (38 years old), largest (17,500 ha) and most restrictive (no entry) marine reserve in New Caledonia (South-Western Pacific). We further demonstrate that wilderness areas support unique ecological values with no equivalency as one gets closer to... |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00346/45742/45379.pdf |
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| Mouillot, David; Bellwood, David R.; Baraloto, Christopher; Chave, Jerome; Galzin, Rene; Harmelin-vivien, Mireille; Kulbicki, Michel; Lavergne, Sebastien; Lavorel, Sandra; Mouquet, Nicolas; Paine, C. E. Timothy; Renaud, Julien; Thuiller, Wilfried. |
| Around the world, the human-induced collapses of populations and species have triggered a sixth mass extinction crisis, with rare species often being the first to disappear. Although the role of species diversity in the maintenance of ecosystem processes has been widely investigated, the role of rare species remains controversial. A critical issue is whether common species insure against the loss of functions supported by rare species. This issue is even more critical in species-rich ecosystems where high functional redundancy among species is likely and where it is thus often assumed that ecosystem functioning is buffered against species loss. Here, using extensive datasets of species occurrences and functional traits from three highly diverse ecosystems... |
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| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00144/25506/60251.pdf |
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| Mariani, Gaël; Cheung, William W. L.; Lyet, Arnaud; Sala, Enric; Mayorga, Juan; Velez, Laure; Gaines, Steven D.; Dejean, Tony; Troussellier, Marc; Mouillot, David. |
| Contrary to most terrestrial organisms, which release their carbon into the atmosphere after death, carcasses of large marine fish sink and sequester carbon in the deep ocean. Yet, fisheries have extracted a massive amount of this “blue carbon,” contributing to additional atmospheric CO2 emissions. Here, we used historical catches and fuel consumption to show that ocean fisheries have released a minimum of 0.73 billion metric tons of CO2 (GtCO2) in the atmosphere since 1950. Globally, 43.5% of the blue carbon extracted by fisheries in the high seas comes from areas that would be economically unprofitable without subsidies. Limiting blue carbon extraction by fisheries, particularly on unprofitable areas, would reduce CO2 emissions by burning less fuel and... |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00658/77008/78264.pdf |
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| Mazel, Florent; Pennell, Matthew W.; Cadotte, Marc W.; Diaz, Sandra; Dalla Riva, Giulio Valentino; Grenyer, Richard; Leprieur, Fabien; Mooers, Arne O.; Mouillot, David; Tucker, Caroline M.; Pearse, William D.. |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00626/73772/75175.pdf |
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| Ottimofiore, Eduardo; Albouy, Camille; Leprieur, Fabien; Descombes, Patrice; Kulbicki, Michel; Mouillot, David; Parravicini, Valeriano; Pellissier, Loic. |
| Coral reefs and their associated fauna are largely impacted by ongoing climate change. Unravelling species responses to past climatic variations might provide clues on the consequence of ongoing changes. Here, we tested the relationship between changes in sea surface temperature and sea levels during the Quaternary and present-day distributions of coral reef fish species. We investigated whether species-specific responses are associated with life-history traits. We collected a database of coral reef fish distribution together with life-history traits for the Indo-Pacific Ocean. We ran species distribution models (SDMs) on 3,725 tropical reef fish species using contemporary environmental factors together with a variable describing isolation from stable... |
| Tipo: Text |
Palavras-chave: Climate change; Dispersal; Indo-Pacific Ocean; Species distribution models. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00373/48403/48607.pdf |
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| Mazel, Florent; Renaud, Julien; Guilhaumon, Francois; Mouillot, David; Gravel, Dominique; Thuiller, Wilfried. |
| In analogy to the species-area relationship (SAR), one of the few laws in ecology, the phylogenetic diversity-area relationship (PDAR) describes the tendency of phylogenetic diversity (PD) to increase with area. Although investigating PDAR has the potential to unravel the underlying processes shaping assemblages across spatial scales and to predict PD loss through habitat reduction, it has been little investigated so far. Focusing on PD has noticeable advantages compared to species richness (SR), since PD also gives insights on processes such as speciation/extinction, assembly rules and ecosystem functioning. Here we investigate the universality and pervasiveness of the PDAR at continental scale using terrestrial mammals as study case. We define the... |
| Tipo: Text |
Palavras-chave: Conservation biogeography; Habitat loss; Null models; Phylogenetic diversity; Species-area relationship; Strict nested design. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00610/72248/71049.pdf |
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| Dalongeville, Alicia; Andrello, Marco; Mouillot, David; Lobreaux, Stephane; Fortin, Marie-josee; Lasram, Frida; Belmaker, Jonathan; Rocklin, Delphine; Manel, Stephanie. |
| Genetic variation, as a basis of evolutionary change, allows species to adapt and persist in different climates and environments. Yet, a comprehensive assessment of the drivers of genetic variation at different spatial scales is still missing in marine ecosystems. Here, we investigated the influence of environment, geographic isolation, and larval dispersal on the variation in allele frequencies, using an extensive spatial sampling (47 locations) of the striped red mullet (Mullus surmuletus) in the Mediterranean Sea. Univariate multiple regressions were used to test the influence of environment (salinity and temperature), geographic isolation, and larval dispersal on single nucleotide polymorphism (SNP) allele frequencies. We used Moran's eigenvector maps... |
| Tipo: Text |
Palavras-chave: Connectivity; Ecological genetics; Marine fish; Mediterranean Sea; Mullus surmuletus; Seascape genetics; Single nucleotide polymorphism. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00454/56556/75079.pdf |
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| Registros recuperados: 66 | |
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