Geographic Characteristics and Meteorological Factors Dominate the Variation of Chlorophyll-a in Lakes and Reservoirs With Higher TP Concentrations

Zhang, Hanxiao1; Huo, Shouliang1; Feng, Lian2; Ma, Chunzi1; Li, Wenpan3; Liu, Yong4; Wu, Fengchang1

2024-06-01

10.1029/2023WR036587

WATER RESOURCES RESEARCH   影响因子和分区

0043-1397

1944-7973

Nutrients such as phosphorus and nitrogen lead to extensive growth of harmful algae in lakes and reservoirs, which results in eutrophication. The driving mechanism of primary productivity change in lakes and reservoirs at a wide spatial and temporal scale remains largely unknown. We establish a water quality database using a stacking machine learning model, including monthly chlorophyll-a (Chl-a), total nitrogen (TN) and phosphorus (TP) concentrations in 255 lakes and 332 reservoirs from 1980 to 2018. We find an increase in the number of lakes and reservoirs at risk of algal blooms, with approximately 2.66% exhibiting Chl-a concentrations exceeding 30 mu g L-1 by 2018. Variations in Chl-a concentrations were not entirely synchronized at the individual and regional levels with TN and TP concentrations, or their stoichiometric ratios, as estimated by a hierarchical linear model spanning 1980 to 2018. Further, we discovered unexpected effects of geographical features (i.e., latitude, longitude, and slope) and meteorological factors (i.e., air temperature) on Chl-a concentrations in the lakes and reservoirs with higher TP concentrations (>0.041 mg L-1 for lakes and >0.027 mg L-1 for reservoirs), through the use of multiple regression trees and structural equation model analysis. Our findings underscore the importance of (a) implementing flexible nutrient pollution control approaches based on nutrient ecoregions that consider geographical variations, and (b) developing mitigation and adaptation strategies to address the uncertain risks posed by climate change in the prevention and control of eutrophication in lakes and reservoirs.

primary productivity chlorophyll a lakes and reservoirs nutrients geographic characteristic meteorological factors

SCI ; EI

英语

其他

National Natural Science Foundation of China["52225903","52309106"] ; National key research and development program of China["2022YFC3201900","2023YFC3209900"]

Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources

Environmental Sciences ; Limnology ; Water Resources

WOS:001248420300001

AMER GEOPHYSICAL UNION

ENVIRONMENT/ECOLOGY

Web of Science

1.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen, Peoples R China
3.China Natl Environm Monitoring Ctr, Beijing, Peoples R China
4.Peking Univ, Coll Environm Sci & Engn, Key Lab Water & Sediment Sci, Minist Educ, Beijing 100871, Peoples R China

Zhang, Hanxiao,Huo, Shouliang,Feng, Lian,et al. Geographic Characteristics and Meteorological Factors Dominate the Variation of Chlorophyll-a in Lakes and Reservoirs With Higher TP Concentrations[J]. WATER RESOURCES RESEARCH,2024,60(6).

Zhang, Hanxiao.,Huo, Shouliang.,Feng, Lian.,Ma, Chunzi.,Li, Wenpan.,...&Wu, Fengchang.(2024).Geographic Characteristics and Meteorological Factors Dominate the Variation of Chlorophyll-a in Lakes and Reservoirs With Higher TP Concentrations.WATER RESOURCES RESEARCH,60(6).

Zhang, Hanxiao,et al."Geographic Characteristics and Meteorological Factors Dominate the Variation of Chlorophyll-a in Lakes and Reservoirs With Higher TP Concentrations".WATER RESOURCES RESEARCH 60.6(2024).