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Primary productivity and seasonal dynamics of planktonic algae species composition in karst surface waters under different land uses

文献类型：期刊论文

作者Bao, Qian1,2,3; Liu, Zaihua2,3,4; Zhao, Min2,3; Hu, Yundi2,3; Li, Dong1,2; Han, Cuihong1,2; Wei, Yu2,3; Ma, Song1,2; Zhang, Yi1,2
刊名JOURNAL OF HYDROLOGY
出版日期2020-12-01
卷号591页码:12
关键词Primary productivity Planktonic algae Species composition Eutrophication control Karst surface waters Land uses
ISSN号0022-1694
DOI10.1016/j.jhydrol.2020.125295
通讯作者Liu, Zaihua(liuzaihua@vip.gyig.ac.cn)
英文摘要Human activities have altered land use patterns and, thus, the hydrochemical features (e.g., CO2(aq), NO3-, and PO43-) of watersheds, influencing both the C cycle and the quality of water (e.g., eutrophication) within them. The ways in which primary productivity and the dynamics of planktonic algae species composition are related to these hydrochemical changes remains unclear, especially in karst waters with high pH and high concentrations of Ca2+ and dissolved inorganic C. In this study, we used the Shawan Karst Test Site, Puding, SW China to analyze the influences of the NO3-, PO43-, and CO2(aq) concentrations on the primary productivity and dynamics of planktonic algae species composition in five spring-fed ponds under different land use patterns at the site during 2018. Our results show the following. (1) Agricultural farming increased the input of NO3-, PO43-, and CO2(aq) from springs to the ponds (i.e., surface waters); meanwhile, shrub and grass lands reduced the input of NO3- and PO43-, but significantly increased the input of CO2(aq) to the water. (2) The total number of planktonic algal cells was mainly related to CO2(aq) in January (i.e., the dormant period), but mainly related to NO3- and PO(4)(3- )in July (i.e., the growth period); this possibly due to the seasonal succession of phytoplanktonic algae species sensitivity of different nutrient elements. (3) In the dormant period, the system is dominated by the phytoplanktonic algal cells sensitive toCO(2(aq)), especially in grass and shrub ponds. In the growth period, the system is dominated by the planktonic algal cells sensitive to NO3- and PO43-; however, they are far less than others in grass and shrub ponds. Thus, we predict that groundwaters with relatively high CO(2(aq) )and low NO3- and PO43- concentrations (resulting from natural afforestation in karst areas) may help alleviate eutrophication and increase C sequestration in the corresponding surface waters, indicating the importance of land-use adjustment in the management of water quality and carbon cycle.
WOS关键词FRESH-WATER ; PHYTOPLANKTON GROWTH ; TEST-SITE ; HYDROCHEMICAL VARIATIONS ; PHOSPHORUS LIMITATION ; SW CHINA ; SOIL CO2 ; NITROGEN ; LAKE ; NUTRIENT
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDB40020000] ; National Natural Science Foundation of China[U1612441] ; National Natural Science Foundation of China[41673136] ; National Natural Science Foundation of China[41921004]
WOS研究方向Engineering ; Geology ; Water Resources
语种英语
WOS记录号WOS:000599757800023
出版者ELSEVIER
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/137517]  
专题中国科学院地理科学与资源研究所
通讯作者Liu, Zaihua
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, State Key Lab Environm Geochem, Inst Geochem, Guiyang 550081, Peoples R China
3.Chinese Acad Sci, Chinese Ecosyst Res Network, Puding Karst Ecosyst Res Stn, Puding 562100, Guizhou, Peoples R China
4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
推荐引用方式
GB/T 7714		 Bao, Qian,Liu, Zaihua,Zhao, Min,et al. Primary productivity and seasonal dynamics of planktonic algae species composition in karst surface waters under different land uses[J]. JOURNAL OF HYDROLOGY,2020,591:12.
APA Bao, Qian.,Liu, Zaihua.,Zhao, Min.,Hu, Yundi.,Li, Dong.,...&Zhang, Yi.(2020).Primary productivity and seasonal dynamics of planktonic algae species composition in karst surface waters under different land uses.JOURNAL OF HYDROLOGY,591,12.
MLA Bao, Qian,et al."Primary productivity and seasonal dynamics of planktonic algae species composition in karst surface waters under different land uses".JOURNAL OF HYDROLOGY 591(2020):12.

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来源：地理科学与资源研究所

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