Multi‐taxa colonisation along the foreland of a vanishing equatorial glacier

作者：Pedro Rosero, Verónica Crespo‐Pérez, Rodrigo Espinosa, Patricio Andino, Álvaro Barragán, Pierre Moret, Mauro Gobbi, Gentile Francesco Ficetola, Ricardo Jaramillo, Priscilla Muriel, Fabien Anthelme, Dean Jacobsen, Olivier Dangles, Thomas Condom, Ludovic Gielly, Jérôme Poulenard, Antoine Rabatel, Rubén Basantes-Serrano, Bolívar Cáceres Correa, Sophie Cauvy‐Fraunié · 发表于：Ecography · 年份：2021 · DOI：10.1111/ecog.05478 · 被引用次数：62 · 研究领域：Environmental DNA in Biodiversity Studies、Microbial Community Ecology and Physiology、Protist diversity and phylogeny

Retreating glaciers, icons of climate change, release new potential habitats for both aquatic and terrestrial organisms. High‐elevation species are threatened by temperature increases and the upward migration of lowlands species. Improving our understanding of successional processes after glacier retreat becomes urgent, especially in the tropics, where glacier shrinkage is particularly fast. We examined the successional patterns of aquatic invertebrates, ground beetles, terrestrial plants, soil eukaryotes (algae, invertebrates, plants) in an equatorial glacier foreland (Carihuairazo, Ecuador). Based on both taxonomical identification and eDNA metabarcoding, we analysed the effects of both environmental conditions and age of deglacierization on community composition. Except for algae, diversity increased with time since deglacierization, especially among passive dispersers, suggesting that dispersal was a key driver structuring the glacier foreland succession. Spatial β‐diversity was mainly attributed to nestedness for aquatic invertebrates, terrestrial plants and soil algae, likely linked to low environmental variability within the studied glacier foreland; and to turnover for soil invertebrates, suggesting competition exclusion at the oldest successional stage. Pioneer communities were dominated by species exhibiting flexible feeding strategies and high dispersal ability (mainly transported by wind), probably colonising from lower altitudes, or from the glacier in the case o...