Rock glacier outflows may adversely affect lakes: lessons from the past and present of two neighboring water bodies in a crystalline-rock watershed.
Rock glacier outflows may adversely affect lakes: lessons from the past and present of two neighboring water bodies in a crystalline-rock watershed.
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DOI：
10.1021/es500180c
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发表时间：
2014-06-03
影响因子：
11.4
通讯作者：
Koinig, Karin A.
中科院分区：
文献类型：
--
作者：
Ilyashuk, Boris P.;Ilyashuk, Elena A.;Psenner, Roland;Tessadri, Richard;Koinig, Karin A.
尽管岩石冰川是山地冻土最常见的地貌表现之一，但其溶质通量对湖泊的影响仍然很不清楚。我们研究了水和沉积物的化学，和生物群的两个相邻的水体和没有岩石冰川在其集水区在欧洲阿尔卑斯山。应用古湖沼学技术跟踪水体生态毒理学状态的长期时间趋势，并确定其基线条件。我们发现，活跃的岩石冰川在矿化集水区的拉萨斯湖（RAS）是一个强大的来源，酸性岩石排水，结果在水，沉积物和生物群的RAS中的金属的巨大浓度。形态异常的发生率在RAS人口的Pseudodiamesa nivosa，摇蚊，是一样高的记录在摇蚊种群居住的网站严重污染的微量金属的人为来源。在过去的2500年里，在RAS中P. nivosa的形态畸形发生率为70%，在全新世早期为40%。RAS的形成在岩石冰川的脚趾最有可能开始在新的冰川消退地区的酸性排水的发病。目前的不利条件在该湖的历史上并不是前所未有的，不能完全与近年来岩石冰川的融化有关。
Despite the fact that rock glaciers are one of the most common geomorphological expressions of mountain permafrost, the impacts of their solute fluxes on lakes still remain largely obscure. We examined water and sediment chemistry, and biota of two neighboring water bodies with and without a rock glacier in their catchments in the European Alps. Paleolimnological techniques were applied to track long-term temporal trends in the ecotoxicological state of the water bodies and to establish their baseline conditions. We show that the active rock glacier in the mineralized catchment of Lake Rasass (RAS) represents a potent source of acid rock drainage that results in enormous concentrations of metals in water, sediment, and biota of RAS. The incidence of morphological abnormalities in the RAS population of Pseudodiamesa nivosa, a chironomid midge, is as high as that recorded in chironomid populations inhabiting sites heavily contaminated by trace metals of anthropogenic origin. The incidence of morphological deformities in P. nivosa of ∼70% persisted in RAS during the last 2.5 millennia and was ∼40% in the early Holocene. The formation of RAS at the toe of the rock glacier most probably began at the onset of acidic drainage in the freshly deglaciated area. The present adverse conditions are not unprecedented in the lake’s history and cannot be associated exclusively with enhanced thawing of the rock glacier in recent years.
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影响因子：
2.5
作者：
BROWN, CL;LUOMA, SN
通讯作者：
LUOMA, SN
影响因子：
64.8
作者：
Hare, L;Tessier, A
通讯作者：
Tessier, A
影响因子：
4.1
作者：
Di Toro, DM;Allen, HE;Santore, RC
通讯作者：
Santore, RC
影响因子：
4
作者：
de Jong, R.;Kamenik, C.;Grosjean, M.
通讯作者：
Grosjean, M.
影响因子：
--
作者：
Burghelea, Carmen I.;Zaharescu, Dragos G.;Palanca-Soler, Antonio
通讯作者：
Palanca-Soler, Antonio