Climate change reshuffles northern species within their niches

Abstract Climate change is a pervasive threat to biodiversity. While range shifts are known consequence of climate warming contributing regional community change, less about how species’ positions shift within their climatic niches. Furthermore, whether the relative importance different variables prompting such varies with changing remains unclear. Here we analysed four decades data for 1,478 species birds, mammals, butterflies, moths, plants and phytoplankton along 1,200 km high latitudinal gradient. The drivers varied non-uniformly progressing change. turnover among was limited, position niche shifted substantially. A greater proportion responded at higher latitudes, where changes were stronger. These diverging imprints restructure full biome, making it difficult generalize biodiversity responses raising concerns ecosystem integrity in face accelerating