Quantifier l'impact d'une certaine quantité d'émissions de gaz à effet de serre sur les ours polaires n'avait pour le moment jamais été fait.
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Biodiversité
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Revue de presse et du net par le Pôle de partage des connaissances S&T de l'Office français de la biodiversité
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DocBiodiv
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Habitat connectivity is essential for maintaining populations of wildlife species, especially as climate changes. Knowledge about the fate of existing habitat networks in a changing climate and in light of land-use change is critical for determining which types of conservation actions must be taken to maintain those networks. However, information is lacking about how multiple focal species that use similar habitats overlap in the degree and geographic patterns of threats to linkages among currently suitable habitat patches. We sought to address that gap. We assessed climate change threat to existing linkages in the southeastern United States for three wildlife species that use similar habitats but differ in the degree to which their ranges are limited by climate, habitat specificity, and dispersal ability.
DocBiodiv's insight:
Jennifer K. Costanza, James Watling, Ron Sutherland, Curtis Belyea, Bistra Dilkina, Heather Cayton, David Bucklin, Stephanie S. Romañach, Nick M. Haddad, 
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Les oiseaux sont-ils voués à devenir de plus en plus petits ? C’est ce que suggère une étude publiée dans la revue Ecology Letters, mercredi 4 décembre, rendant compte du travail minutieux d’un chercheur américain du Field Museum de Chicago. Le rétrécissement des oiseaux est, selon une étude, directement corrélé à la température des zones de reproduction.
DocBiodiv's insight:
Article complet du Monde réservé aux abonnés. Relatif à l'étude scientifique suivante : Shared morphological consequences of global warming in North American migratory birds Brian C. Weeks , David E. Willard, Marketa Zimova Aspen A. Ellis Max L. Witynski Mary Hennen Benjamin M. Winger Des données sont issues de ce travail sur les collisions, connaissiez-vous https://www.birdmonitors.net/
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![[Article] Ecosystème marin = West Coast waters returning to normal but salmon catches lagging: Unusually warm conditions dissipating as 'The Blob,' El Nino wane | Biodiversité | Scoop.it](https://img.scoop.it/sX-LBM6AA7HOsLJlKY1ugTl72eJkfbmt4t8yenImKBVvK0kTmF0xjctABnaLJIm9)
Ocean conditions off most of the US West Coast are returning roughly to average, after an extreme marine heat wave from about 2014 to 2016 disrupted the California Current Ecosystem and shifted many species beyond their traditional range, according to a new report from NOAA Fisheries' two marine laboratories on the West Coast. Some warm waters remain off the Pacific Northwest, however. Via Agrodoc Ouest
Agrodoc Ouest's curator insight,
March 12, 2018 6:09 AM
Les conditions océaniques au large de la majeure partie de la côte ouest des États-Unis reviennent à peu près à la moyenne, après qu'une vague de chaleur marine extrême entre 2014 et 2016 a perturbé l'écosystème californien et déplacé de nombreuses espèces au-delà de leur aire de répartition traditionnelle, selon un nouveau rapport des deux laboratoires marins de NOAA Fisheries sur la côte ouest. Il reste cependant quelques eaux chaudes au large du nord-ouest du Pacifique. Traduit avec www.DeepL.com/Translator |
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At just 5 centimers, or 2 inches, from nose to tail, the Florida reef gecko is so frail that handling it with bare hands is enough to tear its skin. That makes catching it a tricky task: to do so safely, biologists wiggle their fingers in the leaf litter and look beneath cover — such […]
DocBiodiv's insight:
Clements, S.L., Powell, E.A., Mothes, C.C. et al. Assessing the conservation risk of Sphaerodactylus notatus, the U.S. herpetofaunal species most vulnerable to sea level rise. Biodivers Conserv 30, 107–121 (2021). https://doi.org/10.1007/s10531-020-02080-9
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Scientifiques et bénévoles ont ramassé 62.000 carcasses de guillemots de Troïl entre l'été 2015 et le printemps 2016.
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Extreme mortality and reproductive failure of common murres resulting from the northeast Pacific marine heatwave of 2014-2016 Authors :John F. Piatt, Julia K. Parrish, Heather M. Renner, Sarah K. Schoen, et al VOL. 15 Issue 1 Pages e0226087 January 15, 2020 DOI https://dx.plos.org/10.1371/journal.pone.0226087
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L'espèce de poissons de l'Atlantique Nord subit d'importants déclins dans ses populations sauvages. En cause: l'aquaculture intensive et le réchauffement climatique.
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Chronique «l'âge bêtes» Par Aude Massiot le 17 juin 2018
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Most studies of the effects of global changes on biodiversity focus on a single threat, but multiple threats lead to species extinction.
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Combined impacts of global changes on biodiversity across the USAC. Bellard, C. Leclerc & F. Courchamp - Scientific Reports 5, Article number: 11828 (2015)doi:10.1038/srep11828
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Steven C. AmstrupCecilia M. Bitz,Unlock the Endangered Species Act to address GHG emissions. Science 381, 949-951 (2023). DOI:10.1126/science.adh2280