期刊
ANNALS OF GLACIOLOGY
卷 59, 期 77, 页码 95-110出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/aog.2019.1
关键词
biogeochemistry; glacial geomorphology; glacier chemistry; microbiology; processes and landforms of glacial erosion
资金
- MicroArctic Innovative Training Network - European Commissions [675546]
- Helmholtz Recruiting Initiative [I-044-16-01]
- Marie Curie Actions (MSCA) [675546] Funding Source: Marie Curie Actions (MSCA)
Proglacial environments are ideal for studying the development of soils through the changes of rocks exposed by glacier retreat to weathering and microbial processes. Carbon (C) and nitrogen (N) contents as well as soil pH and soil elemental compositions are thought to be dominant factors structuring the bacterial, archaeal and fungal communities in the early stages of soil ecosystem formation. However, the functional linkages between C and N contents, soil composition and microbial community structures remain poorly understood. Here, we describe a multivariate analysis of geochemical properties and associated microbial community structures between a moraine and a glaciofluvial outwash in the proglacial area of a High Arctic glacier (Longyearbreen, Svalbard). Our results reveal distinct differences in developmental stages and heterogeneity between the moraine and the glaciofluvial outwash. We observed significant relationships between C and N contents, delta C-13(org) and delta N-15 isotopic ratios, weathering and microbial abundance and community structures. We suggest that the observed differences in microbial and geochemical parameters between the moraine and the glaciofluvial outwash are primarily a result of geomorphological variations of the proglacial terrain.
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