Bacterial community succession in a high-altitude subarctic glacier foreland is a three-stage process.

摘要: Alpine glaciers are retreating rapidly, exposing foreland minerals, which develop into soils. Bacterial communities in glacier forelands exhibit high rates of turnover and undergo dramatic shifts composition within the first 50 years after deglaciation, followed by relative stabilization convergence. This period microbial development occurs simultaneously with plant colonization most systems; thus, it remains unclear whether changes bacterial occur primarily as result edaphic, climatic, or biotic factors. We examined community structure along two replicate chronosequences glacial Duke River Glacier, Yukon, Canada. is estimated to include >200 bare soils before an appreciable grassline, likely due latitude altitude glacier. enabled us examine prior over a longer than previous studies. observed three successional groups chronosequence: 1) An “early” group less approximately since deglaciation; 2) “intermediate” soils, early but containing relatively degree variability composition; 3) A “grassline” collected higher diversity lower age-group composition. These findings suggest rapid replacement addition species better adapted conditions slower next 150 and, finally, indications possible response colonization. This article protected copyright. All rights reserved.