Assessing the risk of climate maladaptation for Canadian polar bears.
Ecol Lett
; 27(8): e14486, 2024 Aug.
Article
de En
| MEDLINE
| ID: mdl-39109607
ABSTRACT
The Arctic is warming four times faster than the rest of the world, threatening the persistence of many Arctic species. It is uncertain if Arctic wildlife will have sufficient time to adapt to such rapidly warming environments. We used genetic forecasting to measure the risk of maladaptation to warming temperatures and sea ice loss in polar bears (Ursus maritimus) sampled across the Canadian Arctic. We found evidence for local adaptation to sea ice conditions and temperature. Forecasting of genome-environment mismatches for predicted climate scenarios suggested that polar bears in the Canadian high Arctic had the greatest risk of becoming maladapted to climate warming. While Canadian high Arctic bears may be the most likely to become maladapted, all polar bears face potentially negative outcomes to climate change. Given the importance of the sea ice habitat to polar bears, we expect that maladaptation to future warming is already widespread across Canada.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Ursidae
/
Changement climatique
Limites:
Animals
Pays/Région comme sujet:
America do norte
Langue:
En
Journal:
Ecol Lett
/
Ecol. lett
/
Ecology letters
Année:
2024
Type de document:
Article
Pays d'affiliation:
Canada
Pays de publication:
Royaume-Uni