Climate Change Data Portal
DOI | 10.1002/hyp.13533 |
After the peak water: the increasing influence of rock glaciers on alpine river systems | |
Brighenti, Stefano1,2,4; Tolotti, Monica2; Bruno, Maria Cristina2; Engel, Michael3; Wharton, Geraldene4; Cerasino, Leonardo2; Mair, Volkmar5; Bertoldi, Walter1 | |
发表日期 | 2019 |
ISSN | 0885-6087 |
EISSN | 1099-1085 |
卷号 | 33期号:21页码:2804-2823 |
英文摘要 | Human-accelerated climate change is quickly leading to glacier-free mountains, with consequences for the ecology and hydrology of alpine river systems. Water origin (i.e., glacier, snowmelt, precipitation, and groundwater) is a key control on multiple facets of alpine stream ecosystems, because it drives the physico-chemical template of the habitat in which ecological communities reside and interact and ecosystem processes occur. Accordingly, distinct alpine stream types and associated communities have been identified. However, unlike streams fed by glaciers (i.e., kryal), groundwater (i.e., krenal), and snowmelt/precipitation (i.e., rhithral), those fed by rock glaciers are still poorly documented. We characterized the physical and chemical features of these streams and investigated the influence of rock glaciers on the habitat template of alpine river networks. We analysed two subcatchments in a deglaciating area of the Central European Alps, where rock glacier-fed, groundwater-fed, and glacier-fed streams are all present. We monitored the spatial, seasonal, and diel variability of physical conditions (i.e., water temperature, turbidity, channel stability, and discharge) and chemical variables (electrical conductivity, major ions, and trace element concentrations) during the snowmelt, glacier ablation, and flow recession periods of two consecutive years. We observed distinct physical and chemical conditions and seasonal responses for the different stream types. Rock glacial streams were characterized by very low and constant water temperatures, stable channels, clear waters, and high concentrations of ions and trace elements that increased as summer progressed. Furthermore, one rock glacier strongly influenced the habitat template of downstream waters due to high solute export, especially in late summer under increased permafrost thaw. Given their unique set of environmental conditions, we suggest that streams fed by thawing rock glaciers are distinct river habitats that differ from those normally classified for alpine streams. Rock glaciers may become increasingly important in shaping the hydroecology of alpine river systems under continued deglaciation. |
WOS研究方向 | Water Resources |
来源期刊 | HYDROLOGICAL PROCESSES
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/100696 |
作者单位 | 1.Univ Trento, Dept Civil Environm & Mech Engn, Via Mesiano 77, I-38123 Trento, Italy; 2.FEM, Res & Innovat Ctr, Dept Sustainable Agroecosyst & Bioresources, San Michele All Adige, Italy; 3.Free Univ Bozen, Fac Sci & Technol, Bolzano, Italy; 4.Queen Mary Univ London, Sch Geog, London, England; 5.Off Geol & Bldg Mat Testing, Autonomous Prov Bolzano Bozen, Bolzano, Italy |
推荐引用方式 GB/T 7714 | Brighenti, Stefano,Tolotti, Monica,Bruno, Maria Cristina,et al. After the peak water: the increasing influence of rock glaciers on alpine river systems[J],2019,33(21):2804-2823. |
APA | Brighenti, Stefano.,Tolotti, Monica.,Bruno, Maria Cristina.,Engel, Michael.,Wharton, Geraldene.,...&Bertoldi, Walter.(2019).After the peak water: the increasing influence of rock glaciers on alpine river systems.HYDROLOGICAL PROCESSES,33(21),2804-2823. |
MLA | Brighenti, Stefano,et al."After the peak water: the increasing influence of rock glaciers on alpine river systems".HYDROLOGICAL PROCESSES 33.21(2019):2804-2823. |
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