干旱区生态环境知识资源中心(Arid): Assessing chlorophyll-a and water quality dynamics in arid-zone temporary pan systems along a disturbance gradient

Arid

DOI	10.1016/j.scitotenv.2023.162272
	Assessing chlorophyll-a and water quality dynamics in arid-zone temporary pan systems along a disturbance gradient
	Mungenge, Chipo P.; Wasserman, Ryan J.; Dondofema, Farai; Keates, Chad; Masina, Fannie M.; Dalu, Tatenda
通讯作者	Mungenge, CP
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2023
卷号	873
英文摘要	Temporary pans are susceptible to various anthropogenic effects such as pollution, resource extraction, and land use intensification. However, given their small endorheic nature, they are almost entirely influenced by activities close to their internally drained catchments. Human-mediated nutrient enrichment within the pans can lead to eutrophica-tion, resulting in increased primary productivity and decreased associated alpha diversity. The Khakhea-Bray Transboundary Aquifer region and the pan systems that characterise the area are understudied area with no records available of the biodiversity therein. Additionally, the pans are a major water source for the people in these areas. This study assessed differences in nutrients (i.e., ammonium, phosphates) and their effect on chlorophyll-a (chl-a) con-centrations in pans along a disturbance gradient in the Khakhea-Bray Transboundary Aquifer region, South Africa. Physicochemical variables, nutrients, and chl-a were measured from 33 pans representing variable anthropogenic ex-posure during the cool-dry season in May 2022. Five environmental variables (i.e., temperature, pH, dissolved oxygen, ammonium, and phosphates) showed significant differences between the undisturbed and disturbed pans. The dis-turbed pans generally had elevated pH, ammonium, phosphates and dissolved oxygen compared to the undisturbed pans. A strong positive relationship was observed between chl-a and temperature, pH, dissolved oxygen, phosphates and ammonium. Chlorophyll-a concentration increased as surface area, and the distance from kraals, buildings and latrines decreased. Anthropogenic activities were found to have an overall effect on the pan water quality within the Khakhea-Bray Transboundary Aquifer region. Therefore, continuous monitoring strategies should be established to better understand the nutrient dynamics through time and the effect that this may have on productivity and diver-sity in these small endorheic systems.
英文关键词	Anthropogenic activities Chlorophyll-a Nutrient dynamics Temporary pans
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000944476300001
WOS关键词	GROUNDWATER ; POLLUTION ; WETLANDS
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/2XILL650/398513
推荐引用方式 GB/T 7714	Mungenge, Chipo P.,Wasserman, Ryan J.,Dondofema, Farai,et al. Assessing chlorophyll-a and water quality dynamics in arid-zone temporary pan systems along a disturbance gradient[J],2023,873.
APA	Mungenge, Chipo P.,Wasserman, Ryan J.,Dondofema, Farai,Keates, Chad,Masina, Fannie M.,&Dalu, Tatenda.(2023).Assessing chlorophyll-a and water quality dynamics in arid-zone temporary pan systems along a disturbance gradient.SCIENCE OF THE TOTAL ENVIRONMENT,873.
MLA	Mungenge, Chipo P.,et al."Assessing chlorophyll-a and water quality dynamics in arid-zone temporary pan systems along a disturbance gradient".SCIENCE OF THE TOTAL ENVIRONMENT 873(2023).