Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13985 |
Rock glaciers in crystalline catchments: Hidden permafrost-related threats to alpine headwater lakes | |
Ilyashuk, Boris P.1,2; Ilyashuk, Elena A.1; Psenner, Roland1,2; Tessadri, Richard3; Koinig, Karin A.1,2 | |
2018-04-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:4页码:1548-1562 |
文章类型 | Article |
语种 | 英语 |
国家 | Austria; Italy |
英文摘要 | A global warming-induced transition from glacial to periglacial processes has been identified in mountainous regions around the world. Degrading permafrost in pristine periglacial environments can produce acid rock drainage (ARD) and cause severe ecological damage in areas underlain by sulfide-bearing bedrock. Limnological and paleolimnological approaches were used to assess and compare ARDs generated by rock glaciers, a typical landform of the mountain permafrost domain, and their effects on alpine headwater lakes with similar morphometric features and underlying bedrock geology, but characterized by different intensities of frost action in their catchments during the year. We argue that ARD and its effects on lakes are more severe in the alpine periglacial belt with mean annual air temperatures (MAAT) between -2 degrees C and +3 degrees C, where groundwater persists in the liquid phase for most of the year, in contrast to ARD in the periglacial belt where frost action dominates (MAAT<-2 degrees C). The findings clearly suggest that the ambient air temperature is an important factor affecting the ARD production in alpine periglacial environments. Applying the paleoecological analysis of morphological abnormalities in chironomids through the past millennium, we tested and rejected the hypothesis that unfavorable conditions for aquatic life in the ARD-stressed lakes are largely related to the temperature increase over recent decades, responsible for the enhanced release of ARD contaminants. Our results indicate that the ARDs generated in the catchments are of a long-lasting nature and the frequency of chironomid morphological deformities was significantly higher during the Little Ice Age (LIA) than during pre- or post-LIA periods, suggesting that lower water temperatures may increase the adverse impacts of ARD on aquatic invertebrates. This highlights that temperature-mediated modulations of the metabolism and life cycle of aquatic organisms should be considered when reconstructing long-term trends in the ecotoxicological state of lakes. |
英文关键词 | acid drainage chironomid deformities cryosphere ecotoxicology frost action metals paleolimnology periglacial environments |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426504400011 |
WOS关键词 | CHIRONOMUS-RIPARIUS DIPTERA ; INCREASED OXYGEN CONDITIONS ; COLORADO FRONT RANGE ; HIGH-MOUNTAIN LAKE ; AQUATIC INVERTEBRATES ; METAL BIOAVAILABILITY ; CLIMATE-CHANGE ; EUROPEAN ALPS ; POLLUTED SITE ; NATIONAL-PARK |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17767 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Innsbruck, Inst Ecol, Innsbruck, Austria; 2.Eurac Res, Inst Alpine Environm, Bozen Bolzano, Italy; 3.Univ Innsbruck, Inst Mineral & Petrog, Innsbruck, Austria |
推荐引用方式 GB/T 7714 | Ilyashuk, Boris P.,Ilyashuk, Elena A.,Psenner, Roland,et al. Rock glaciers in crystalline catchments: Hidden permafrost-related threats to alpine headwater lakes[J]. GLOBAL CHANGE BIOLOGY,2018,24(4):1548-1562. |
APA | Ilyashuk, Boris P.,Ilyashuk, Elena A.,Psenner, Roland,Tessadri, Richard,&Koinig, Karin A..(2018).Rock glaciers in crystalline catchments: Hidden permafrost-related threats to alpine headwater lakes.GLOBAL CHANGE BIOLOGY,24(4),1548-1562. |
MLA | Ilyashuk, Boris P.,et al."Rock glaciers in crystalline catchments: Hidden permafrost-related threats to alpine headwater lakes".GLOBAL CHANGE BIOLOGY 24.4(2018):1548-1562. |
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