Characterizing the Chemical Profile of Biological Decline in Stormwater-Impacted Urban Watersheds

Peter Katherine T.; Lundin Jessica I; Wu ChristopherFeist Blake E.Tian ZhenyuCameron James R.Scholz Nathaniel L.Kolodziej Edward P.

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Characterizing the Chemical Profile of Biological Decline in Stormwater-Impacted Urban Watersheds

机译：Characterizing the Chemical Profile of Biological Decline in Stormwater-Impacted Urban Watersheds

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Chemical contamination is an increasingly important conservation issue in urban runoff-impacted watersheds. Regulatory and restoration efforts typically evaluate limited conventional parameters and pollutants. However, complex urban chemical mixtures contain hundreds to thousands of organic contaminants that remain unidentified, unregulated, and poorly understood. This study aimed to develop broadly representative metrics of water quality impairment corresponding to previously documented biological degradation along gradients of human impacts. Stream samples (n = 65, baseflow/rainfall conditions, 2017-2018) were collected from 15 regional watersheds (Puget Sound, WA, USA) across an urbanization gradient defined by landscape characteristics. Surface water chemical composition characterized via non-targeted high-resolution mass spectrometry (7068 detections) was highly correlated with landscape-based urbanization gradient (p < 0.01) and season (p < 0.01). Landscape-scale changes in chemical composition closely aligned with two anchors of biological decline: coho salmon (Oncorhynchus kisutch) mortality risk (p < 0.001) and loss of stream macroinvertebrate diversity and abundance (p < 0.001). We isolated and identified 32 indicators for urban runoff impacts and corresponding receiving water ecological health, including well-known anthropogenic contaminants (e.g., caffeine, organophosphates, vehicle-derived chemicals), two related environmental transformation products, and a novel (methoxymethyl)melamine compound. Outcomes support data-directed selection of next-generation water quality indicators for prioritization and evaluation of watershed management efforts intended to protect aquatic ecosystems.

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《Environmental Science & Technology: ES&T》 |2022年第5期|3159-3169|共11页
作者
Peter Katherine T.; Lundin Jessica I; Wu ChristopherFeist Blake E.Tian ZhenyuCameron James R.Scholz Nathaniel L.Kolodziej Edward P.;
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作者单位

Univ Washington;

NOAA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
urban stream syndrome; land cover; index of biological integrity; B-IBI; stormwater; high-resolution mass spectrometry; nontargeted analysis; coho salmon; urban runoff mortality syndrome; macroinvertebrate; nonpoint source pollution; FLIGHT MASS-SPECTROMETRY; LAND-USE; ORGANIC-CHEMICALS; RISK-ASSESSMENT; HIGHWAY RUNOFF; STREAM; URBANIZATION; CONTAMINANTS; POLLUTANTS; PATTERNS;

Characterizing the Chemical Profile of Biological Decline in Stormwater-Impacted Urban Watersheds

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