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Spatial and temporal variation of multiple eco-environmental indicators in Erhai Lake Basin of China under land use transitions

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Abstract

Environmental degradation is a global ecological concern, and land use transitions play a critical role in a region’s ecological well-being and long-term sustainability. In this paper, indicators related to land use transitions, including the regional eco-environmental quality index (EV), the remote sensing ecological index (RSEI), and soil erosion, are selected to analyze the eco-environmental quality of Erhai Lake Basin from 2000 to 2020. The results showed that (1) from 2000 to 2020, forestland, grassland, and cultivated land were the major land use types in the study region, and also the land use types where land use transition was notable; (2) over the 20 years of study, the EV value of Erhai Lake Basin increased by 0.003, its average RSEI increased by 0.14, and the average soil erosion modulus there decreased by 15.48 t/(km2·a), indicating that the eco-environment of the Erhai Lake Basin was improving. Evaluation based on multiple ecological indicators was superior to assessment relying on single indicators; (3) all three ecological indicators showed that the ecological environment of the basin was improving, but with significant regional differences. Forestland had the best ecological quality, while unused land and built-up land had the worst. RSEI was more regionally adaptable than the other two indices. (4) The transition of cultivated land into other land use types was the main reason for the improved ecological quality in the basin, while tourism had accelerated land use transformation. Compared with assessment based on single ecological indicators, evaluation based on a combination of multiple ecological indicators can more accurately reflect the ecological condition of the study area and provide a basis for eco-environmental protection in Erhai Lake Basin.

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All data generated or analyzed during this study are included in this published article.

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Funding

We thank the National Natural Science Foundation of China (grant No. 41961040) and the Yunnan Province Agricultural Joint Special General Project (grant No. 202101BD070001-101) for providing financial support.

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Conceptualization: Yakun Dong, Wei Ma, Yu Wang, Weijun Zeng; methodology: Yakun Dong, Wei Ma, Zhiwei Tan, Weijun Zeng; writing—original draft: Yakun Dong, Wei Ma, Zhiwei Tan; writing—review and editing: Yakun Dong, Wei Ma, Zhiwei Tan, Yu Wang, Weijun Zeng.

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Correspondence to Weijun Zeng.

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Dong, Y., Ma, W., Tan, Z. et al. Spatial and temporal variation of multiple eco-environmental indicators in Erhai Lake Basin of China under land use transitions. Environ Sci Pollut Res 30, 16236–16252 (2023). https://doi.org/10.1007/s11356-022-23279-z

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  • DOI: https://doi.org/10.1007/s11356-022-23279-z

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