干旱区生态环境知识资源中心(Arid): River nutrient water and sediment measurements inform on nutrient retention, with implications for eutrophication

Arid

DOI	10.1016/j.scitotenv.2019.05.167
	River nutrient water and sediment measurements inform on nutrient retention, with implications for eutrophication
	Dalu, Tatenda 1,2; Wasserman, Ryan J.2,3; Magoro, Mandla L.2,5; Froneman, P. William 4; Weyl, Olaf L. F.5
通讯作者	Dalu, Tatenda
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2019
卷号	684 页码:296-302
英文摘要	The consideration of nutrients in pollution dynamics is important for environmental management and conservation. Developing countries arc yet to appreciate the aquatic ecosystem pollution impacts on their economies and as such, information on water pollution dynamics is limited. This study assessed the spatio-temporal dynamics of nutrient loading and retention in stream water and sediments in the Bloukrans River system, Eastern Cape province, South Africa over the course of the wet and dry season. Sediment and water samples were analysed for total phosphorus (TP) and nitrogen (TN) concentrations, and were used in combination with river flow discharge, to determine nutrient loads. The study results highlight that river discharge plays a significant role in temporal differences in sediment and water column nutrient concentrations. The mean sediment nutrient concentration was high for the dry season, with high values being observed for the urban river system. Nutrient loads were high above the sewage treatment works outflow (i.e. urban sites), as such, a decreasing trend was observed with increasing distance from the urban environment. Nutrient loads were generally high for the dry season in comparison to the wet season indicating organic matter retention (i.e. accumulation from burst sewage pipes) most likely due to low flows. While it was evident that the ageing wastewater infrastructure contributed to the observed state of the Bloukrans River, the high natural nutrient retention capacity seemed to mitigate eutrophicalion of downstream aquatic ecosystems. As such, the nutrient retention capacity and management of the system is central to the entire Bloukrans River catchment management practices. Therefore, the study contributes to our understanding of water and sediment nutrient pollution dynamics in an arid temperate river landscape where vast spatio-temporal differences in base flow characterise the riverscape. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	Bloukrans River Aquatic ecosystems Eutrophication Sediment contaminant assessment Total nitrogen Total phosphorus
类型	Article
语种	英语
国家	South Africa ; Botswana
收录类别	SCI-E
WOS记录号	WOS:000472024300027
WOS关键词	PARTIAL LEAST-SQUARES ; LAND-USE CONFLICTS ; PHOSPHORUS RETENTION ; FORESTED WATERSHEDS ; HEADWATER STREAMS ; QUALITY ; NITRATE ; COMMUNITIES ; VARIABILITY ; LIMITATION
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218710
作者单位	1.Univ Venda, Dept Ecol & Resource Management, ZA-0950 Thohoyandou, South Africa; 2.South African Inst Aquat Biodivers, ZA-6140 Grahamstown, South Africa; 3.Botswana Int Univ Sci & Technol, Dept Biol Sci & Biotechnol, Palapye, Botswana; 4.Rhodes Univ, Dept Zool & Entomol, ZA-6140 Grahamstown, South Africa; 5.South African Inst Aquat Biodivers, DST NRF Res Chair Inland Fisheries & Freshwater E, ZA-6140 Grahamstown, South Africa
推荐引用方式 GB/T 7714	Dalu, Tatenda,Wasserman, Ryan J.,Magoro, Mandla L.,et al. River nutrient water and sediment measurements inform on nutrient retention, with implications for eutrophication[J],2019,684:296-302.
APA	Dalu, Tatenda,Wasserman, Ryan J.,Magoro, Mandla L.,Froneman, P. William,&Weyl, Olaf L. F..(2019).River nutrient water and sediment measurements inform on nutrient retention, with implications for eutrophication.SCIENCE OF THE TOTAL ENVIRONMENT,684,296-302.
MLA	Dalu, Tatenda,et al."River nutrient water and sediment measurements inform on nutrient retention, with implications for eutrophication".SCIENCE OF THE TOTAL ENVIRONMENT 684(2019):296-302.