Publication

Biodiversity changes in Arctic coastal ecosystems under borealization

PNAS Nexus.

Arctic
biodiversity
coastal
climate change
Authors

S Descamps

S Jungblut

NG Yoccoz

RW Schlegel

KM Kovacs

F Merkel

PE Renaud

A Sen

JE Soreide

A Vader

A Bailey

J Berge

L Dusedau

GW Gabrielsen

SA Hanssen

H Hop

LL Jorgensen

C Lydersen

M Marnela

L Merillet

B Moe

C Sauser

GH Systad

A Wold

K Bischof

Published

January 9, 2026

This study combines three decades of abundance data across multiple animal groups and regions in the European Arctic and Greenland to assess biodiversity change in Arctic coastal communities. The results support widespread borealization, with Arctic endemic species generally declining while boreal species increase, alongside an average rise in biodiversity that may nevertheless mask uncertain long-term consequences for Arctic ecosystem functioning and services.

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