(2/2) Resultats : 16 espèces de céphalopodes identifiées. Prochaine étape, les analyses de feces par metabarcoding. @isyeb.mnhn.fr @mnhn.fr MONICEPH project: Monitoring cephalopods during whale-watching activity in the Azores (2020-2024) bdj.pensoft.net/articles.php...
In @ecol-evol.bsky.social 16(3) #OpenAccess
"A Multi‐Taxa Approach to Estuarine Biomonitoring: Assessing Vertebrate Biodiversity and Ecological Continuity Using Environmental DNA Metabarcoding in...."
Haderlé, R., Ung, V., @megafaunmardna.bsky.social @isyeb.mnhn.fr et al.
👉 doi.org/10.1002/ece3...
(1/2) Que mangent les cachalots aux Acores ? S. Succiu, lors de sa thèse que j'ai le plaisir de co-encadrer, a utilisé des protocoles de science participative pour récolter des échantillons et les analyser par Barcoding de l'ADN. @isyeb.mnhn.fr @mnhn.fr bdj.pensoft.net/articles.php...
#PolarBiology 49(2)
The Arctic is undergoing rapid warming, with Svalbard among the fastest-changing regions worldwide
"Winter is leaving: an eDNA-based assessment of marine..."
Haderlé,R., Cosnier,K., Lecointre,G., Ung,V. & @megafaunmardna.bsky.social @isyeb.mnhn.fr et al.
doi.org/10.1007/s003...
bdj.pensoft.net
The study of oceanic cephalopods off the Azores Archipelago began decades ago with the analysis of stomach contents from sperm whales that were hunted for the whaling industry. The identification of numerous cephalopod species contributed significantly to cephalopod taxonomy, as well as enhancing understanding of the sperm whale diet. In the 1990s, the shift from whaling to whale-watching created new opportunities to continue studying deep-ocean ecology: participatory research involving the actors of the new industry.MONICEPH (MONItoring CEPHalopods during whale-watching activity in the Azores) is a collaborative platform designed to collect, organise and disseminate cephalopod occurrence data gathered by whale-watching companies in the Azores. From 2020 to 2024, cephalopod remains found at the water's surface during sightings of cetaceans were collected in partnership with companies from four islands: São Miguel, Terceira, Pico and Faial. The deep-ocean cephalopod remains at the water’s surface were likely brought up by their predators during feeding activity. We assume that sperm whales, in particular, occasionally release cephalopods at the surface due to incomplete consumption during a hunt or for feeding of their calves. Trained staff collected the samples, which were subsequently identified using DNA barcoding and/or morphological characteristics. The dataset includes 182 cephalopod records across 16 species. One species, Onykia carriboea Lesueur, 182, has been newly identified in the region, expanding the list of species previously documented in the published data for the Northeast Atlantic.
The Arctic is undergoing rapid and spatially heterogeneous warming, with Svalbard among the fastest-changing regions worldwide. These transformations are reshaping coastal ecosystems and marine vertebrate communities, yet biodiversity assessments remain limited by logistical constraints and protection regulations. Environmental DNA (eDNA) metabarcoding offers a non-invasive alternative capable of capturing taxonomic and phylogenetic diversity across habitats. Here, we surveyed marine vertebrates along the western coast of Svalbard using continuous seawater filtration (16 transects of 2.5 miles each) from a dedicated sailing vessel, covering glacier fronts, walrus haul-out sites, harbors, and both shallow and deep-water areas. Across 31 samples collected at 16 sites, we detected 36 taxa, including 19 fish, 8 mammals, 8 birds, and 1 elasmobranch species. The congruence between eDNA, visual observations, and acoustic detections confirms the feasibility and robustness of eDNA sampling under Arctic conditions. Contrary to expectations of homogeneous assemblages across nearby sites, we observed marked taxonomic and phylogenetic turnover among habitats. Harbors and walrus haul-out areas showed particularly high taxonomic richness and phylogenetic diversity, whereas glacier-influenced sites were dominated by a few closely related taxa, suggesting that local conditions constrain community composition. Several detections, including Gasterosteus aculeatus, increased Phoca vitulina occurrence, and widespread Branta leucopsis, are consistent with biogeographic shifts linked to Arctic warming. The identification of Red List species and elusive taxa further illustrates the sensitivity of eDNA for conservation-focused monitoring. Overall, this study establishes eDNA metabarcoding as an effective tool for characterizing Arctic marine vertebrate communities and provides a valuable baseline for tracking ecological responses to rapid environmental change.
doi.org
We applied eDNA metabarcoding to assess vertebrate diversity in the Rance Estuary, France, across five stations spanning marine to freshwater environments, including areas upstream and downstream of ...
The study of oceanic cephalopods off the Azores Archipelago began decades ago with the analysis of stomach contents from sperm whales that were hunted for the whaling industry. The identification of n...
Rachel Haderlé doctorante @isyeb.mnhn.fr interviewée dans un podcast #Café_Nemo sur l'ADN environnemental (ADNe)
C'est quoi exactement et comment est-il utilisé par les scientifiques pour détecter les espèces ?
Sur #YouTube et les autres plateformes de streaming
🌊 youtu.be/xQ_3OO8kp68?...
Le @mnhn.fr qui oeuvre pour une meilleure connaissance des milieux marin présente son nouveau navire de recherche bas carbone de la Station marine de Dinard:la Korrigane, construite en aluminium recyclé, possédant une double propulsion électrique & diesel, va permettre aux scientifiques de mettre..
