Biodiversity changes in Arctic coastal ecosystems under borealization

作者：Sébastien Descamps, Simon Jungblut, Nigel G. Yoccoz, Robert W. Schlegel, Kit M. Kovacs, Flemming Ravn Merkel, Paul E. Renaud, Arunima Sen, Janne E. Søreide, Anna Vader, Allison Bailey, Jørgen Berge, Luisa Düsedau, Geir W Gabrielsen, Sveinn A Hanssen, Haakon Hop, Lis L Jørgensen, C. Lydersen, Marika Marnela, Laurène Mérillet, Børge Moe, Christophe Sauser, Geir Helge Systad, Anette Wold, Kai Bischof · 发表于：PNAS Nexus · 年份：2026 · DOI：10.1093/pnasnexus/pgag004 · 被引用次数：2 · 研究领域：Marine and fisheries research、Arctic and Antarctic ice dynamics、Marine Biology and Ecology Research

Climate change is playing a major role in the current global biodiversity crisis. However, despite climate change being most pronounced in the Arctic, its impacts on biodiversity in this region remains largely unknown. Here, we combined three decades of abundance data from various animal groups (from zooplankton to megafauna) and regions in the European Arctic and Greenland to assess recent changes in biodiversity within Arctic coastal communities. Our results support the "borealization" hypothesis in all regions and provide evidence that marine ecosystems in the North Atlantic Arctic are shifting toward a boreal (i.e. cold temperate) state. Arctic endemic species are generally declining in abundance, while boreal species are increasing. These changes in abundance are associated with an average increase in biodiversity (e.g. species richness), although there are important variations among animal groups. This increase might be transient and the long-term implications of the ongoing changes in Arctic coastal biodiversity on ecosystem functioning and services remain uncertain.