干旱区生态环境知识资源中心(Arid): Influence of land cover types and phytoplankton community on the distribution and fate of dissolved organic matter in a typical river located in the semi-arid regions of China

Arid

DOI	10.1016/j.jhydrol.2022.127818
	Influence of land cover types and phytoplankton community on the distribution and fate of dissolved organic matter in a typical river located in the semi-arid regions of China
	Zhang, Yixuan; Cheng, Dandong; Ren, Yuanxin; Song, Jinxi; Xu, Daliang; Chen, Rui; Pang, Rui; Xia, Jun
通讯作者	Cheng, DD ; Xia, J
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2022
卷号	610
英文摘要	Land use can impact dissolved organic matter (DOM) dynamics directly by changing terrestrial loading in anthropogenic areas, and indirectly by promoting in-situ phytoplankton production due to the high load of nutrients. However, understanding how land use and phytoplankton community interact to affect DOM quantity and quality is deficient. To tease apart the synergistic effects of land use and phytoplankton on DOM dynamics, fluorescence spectroscopy with parallel factor analysis (PARAFAC) and mediation analysis was performed in this study. PARAFAC produced three components that had two humic-like (C1 and C2) and a protein-like (C3) fluorescent components, significantly related to anthropogenic land-use (cropland + urban area) and phytoplankton concentration (p < 0.05). Through the mediation analysis, the altered C1 and C3 at sites with a higher proportion of anthropogenic land-use appeared to originate partly as a result of the phytoplankton production fueled by a high load of nutrients from anthropogenic run-off (26.6% and 12.5%). These results suggested phytoplankton significantly mediated the effects of land use on microbial humic-like and protein-like DOM. Additionally, Redundancy analysis (RDA) results further showed that Phormidium (Cyanophyta) had a notable influence on the production of the protein-like component via phytoplankton. Conversely, the decreases in terrestrial humic-like C2 were mainly attributed to the reduced terrestrial loading in anthropogenic areas. These findings provide insights into the roles of land use and phytoplankton communities in DOM dynamics and advance our understanding of the mechanisms that drive DOM composition patterns.
英文关键词	Dissolved organic matter Anthropogenic land use Phytoplankton community Mediation analysis Parallel factor analysis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000803009000006
WOS关键词	EXCITATION-EMISSION MATRIX ; FLUORESCENCE SPECTROSCOPY ; MOLECULAR-WEIGHT ; WEIHE RIVER ; CARBON ; VARIABILITY ; ABSORPTION ; BIOGEOCHEMISTRY ; BIOAVAILABILITY ; ABSORBENCY
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393491
推荐引用方式 GB/T 7714	Zhang, Yixuan,Cheng, Dandong,Ren, Yuanxin,et al. Influence of land cover types and phytoplankton community on the distribution and fate of dissolved organic matter in a typical river located in the semi-arid regions of China[J],2022,610.
APA	Zhang, Yixuan.,Cheng, Dandong.,Ren, Yuanxin.,Song, Jinxi.,Xu, Daliang.,...&Xia, Jun.(2022).Influence of land cover types and phytoplankton community on the distribution and fate of dissolved organic matter in a typical river located in the semi-arid regions of China.JOURNAL OF HYDROLOGY,610.
MLA	Zhang, Yixuan,et al."Influence of land cover types and phytoplankton community on the distribution and fate of dissolved organic matter in a typical river located in the semi-arid regions of China".JOURNAL OF HYDROLOGY 610(2022).