气候变化领域集成服务门户(CCPortal): Ecological status of river networks: Stream order-dependent impacts of agricultural and urban pressures across ecoregions

CCPortal

DOI	10.1088/1748-9326/abb62e
	Ecological status of river networks: Stream order-dependent impacts of agricultural and urban pressures across ecoregions
	Büttner O.; Jawitz J.W.; Borchardt D.
发表日期	2020
ISSN	17489318
卷号	15 期号:10
英文摘要	Why have ecological targets for the majority of water bodies in Europe not been met despite decades of water protection programs? We hypothesize that restoration strategies have not adequately accounted for whole-river network perspectives, including interactions between stream orders, spatial patterns of pollutant sources, and ecoregion-dependent susceptibility. We used high-resolution data from Germany to identify relationships between urban wastewater-river discharge fraction (UDF), agricultural land use fraction (ALF), and ecological status by stream order across three ecoregions. Low-flow UDF values were used to reflect the strong vulnerability of low-order streams under these conditions. We found ecological status of good or better in less than 8% of all river sections with the highest proportions in low-order streams and complete disappearance at higher orders. Increasing ALF impaired the ecological status for river reaches across all stream orders. In contrast, relationships between UDF and ecological status impairment were significant only in low-order streams, independent from ecoregion. Concentrating integrative restoration efforts in low-order streams would maximize the potential to mitigate anthropogenic impacts. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	biodiversity; bioindicators; catchments; environmental assessment; environmental management; multiple pressures; river ecology
语种	英语
scopus关键词	Agricultural robots; Agriculture; Data streams; Land use; Restoration; River pollution; Agricultural land use; Anthropogenic impacts; Ecological status; Ecological targets; High resolution data; Pollutant sources; Restoration strategies; Urban wastewater; Rivers
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153562
作者单位	Department Aquatic Ecosystems Analysis and Management, Helmholtz Centre for Environmental Research-UFZ, Germany; Soil and Water Sciences Department, University of Florida, Gainesville, FL 32611, United States
推荐引用方式 GB/T 7714	Büttner O.,Jawitz J.W.,Borchardt D.. Ecological status of river networks: Stream order-dependent impacts of agricultural and urban pressures across ecoregions[J],2020,15(10).
APA	Büttner O.,Jawitz J.W.,&Borchardt D..(2020).Ecological status of river networks: Stream order-dependent impacts of agricultural and urban pressures across ecoregions.Environmental Research Letters,15(10).
MLA	Büttner O.,et al."Ecological status of river networks: Stream order-dependent impacts of agricultural and urban pressures across ecoregions".Environmental Research Letters 15.10(2020).