Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13361 |
Dry conditions disrupt terrestrial-aquatic linkages in northern catchments | |
Szkokan-Emilson, Erik J.1; Kielstra, Brian W.2; Arnott, Shelley E.2; Watmough, Shaun A.3; Gunn, John M.4; Tanentzap, Andrew J.1 | |
2017 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Canada |
英文摘要 | Aquatic ecosystems depend on terrestrial organic matter (tOM) to regulate many functions, such as food web production and water quality, but an increasing frequency and intensity of drought across northern ecosystems is threatening to disrupt this important connection. Dry conditions reduce tOM export and can also oxidize wetland soils and release stored contaminants into stream flow after rainfall. Here, we test whether these disruptions to terrestrial-aquatic linkages occur during mild summer drought and whether this affects biota across 43 littoral zone sites in 11 lakes. We use copper (Cu) and nickel (Ni) as representative contaminants, and measure abundances of Hyalella azteca, a widespread indicator of ecosystem condition and food web production. We found that tOM concentrations were reduced but correlations with organic soils (wetlands and riparian forests) persisted during mild drought and were sufficient to suppress labile Cu concentrations. Wetlands, however, also became a source of labile Ni to littoral zones, which was linked to reduced abundances of the amphipod H. azteca, on average by up to 70 times across the range of observed Ni concentrations. This reveals a duality in the functional linkage of organic soils to aquatic ecosystems whereby they can help buffer the effects of hydrologic disconnection between catchments and lakes but at the cost of biogeochemical changes that release stored contaminants. As evidence of the toxicity of trace contaminant concentrations and their global dispersion grows, sustaining links among forests, organic soils and aquatic ecosystems in a changing climate will become increasingly important. |
英文关键词 | climate change dissolved organic carbon drought Hyalella azteca littoral invertebrates metal toxicity organic soils terrestrial organic matter |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000390218300011 |
WOS关键词 | DISSOLVED ORGANIC-CARBON ; DROUGHT-INDUCED ACIDIFICATION ; BIOTIC LIGAND MODEL ; RANGE ATMOSPHERIC TRANSPORT ; AMPHIPOD HYALELLA-AZTECA ; LAKE FOOD WEBS ; BENTHIC INVERTEBRATES ; DIFFUSIVE GRADIENTS ; MOUNTAIN STREAMS ; CHRONIC TOXICITY |
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/17576 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Cambridge, Dept Plant Sci, Ecosyst & Global Change Grp, Cambridge CB2 3EA, England; 2.Queens Univ, Dept Biol, Kingston, ON K7L 3J9, Canada; 3.Trent Univ, Sch Environm, Peterborough, ON K9L 0G2, Canada; 4.Laurentian Univ, Vale Living Lakes Ctr, Sudbury, ON P3E 2C6, Canada |
推荐引用方式 GB/T 7714 | Szkokan-Emilson, Erik J.,Kielstra, Brian W.,Arnott, Shelley E.,et al. Dry conditions disrupt terrestrial-aquatic linkages in northern catchments[J]. GLOBAL CHANGE BIOLOGY,2017,23(1). |
APA | Szkokan-Emilson, Erik J.,Kielstra, Brian W.,Arnott, Shelley E.,Watmough, Shaun A.,Gunn, John M.,&Tanentzap, Andrew J..(2017).Dry conditions disrupt terrestrial-aquatic linkages in northern catchments.GLOBAL CHANGE BIOLOGY,23(1). |
MLA | Szkokan-Emilson, Erik J.,et al."Dry conditions disrupt terrestrial-aquatic linkages in northern catchments".GLOBAL CHANGE BIOLOGY 23.1(2017). |
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