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

Dong, Yakun; Ma, Wei; Tan, Zhimin; Wang, Yu; Zeng, Weijun

doi:10.1007/s11356-022-23279-z

Cited by 14 publications

(7 citation statements)

References 64 publications

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“…Specifically, in the land regions from 1999 to 2019, lower EEQ values were predominantly clustered around Erhai Lake, which experienced intense human activity. Conversely, higher EEQ values were primarily concentrated in the western and southern parts of the study area, notably in the Cangshan region situated in the western segment of the Erhai Lake Basin 30,31 .…”

Section: Changes In the Eeqmentioning

confidence: 89%

“…These developments have posed potential threats to the aquatic ecosystem and human health 29 . The EEQ in the Erhai Lake Basin was recently evaluated 30 , 31 , but the impact of water ecological factors was not considered therein. Erhai Lake and its surrounding rivers are integral components of the Erhai Lake Basin and must not be overlooked in its EEQ assessment.…”

Section: Introductionmentioning

confidence: 99%

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Eco-environmental changes due to human activities in the Erhai Lake Basin from 1990 to 2020

Liu,

Chen,

Tang

et al. 2024

Sci Rep

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Human activities have increased with urbanisation in the Erhai Lake Basin, considerably impacting its eco-environmental quality (EEQ). This study aims to reveal the evolution and driving forces of the EEQ using water benefit–based ecological index (WBEI) in response to human activities and policy variations in the Erhai Lake Basin from 1990 to 2020. Results show that (1) the EEQ exhibited a pattern of initial degradation, subsequent improvement, further degradation and a rebound from 1990 to 2020, and the areas with poor and fair EEQ levels mainly concentrated around the Erhai Lake Basin with a high level of urbanisation and relatively flat terrain; (2) the EEQ levels were not optimistic in 1990, 1995 and 2015, and areas with poor and fair EEQ levels accounted for 43.41%, 47.01% and 40.05% of the total area, respectively; and (3) an overall improvement in the EEQ was observed in 1995–2000, 2000–2005, 2005–2009 and 2015–2020, and the improvement was most significant in 1995–2000, covering an area of 823.95 km2 and accounting for 31.79% of the total area. Results also confirmed that the EEQ changes in the Erhai Lake Basin were primarily influenced by human activities and policy variations. Moreover, these results can provide a scientific basis for the formulation and planning of sustainable development policy in the Erhai Lake Basin.

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Section: Changes In the Eeqmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Eco-environmental changes due to human activities in the Erhai Lake Basin from 1990 to 2020

Liu,

Chen,

Tang

et al. 2024

Sci Rep

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“…However, in recent years, the region has witnessed a signi cant deterioration in water quality, primarily due to excessive N and P loss. The western and northern areas of the ELB are the major contributors to this pollution, largely attributed to the improper use of fertilizers as the main source of N and P contamination [9][10][11] . Studies show that around 30% of the total nitrogen (TN) entering the ELB is fertilizer-derived, with fertilizer diffusion being the primary contributor to mineral-N in the basin 12 .…”

Section: Introductionmentioning

confidence: 99%

Optimizing nutrient management to improve tobacco quality while reducing nutrient losses in tobacco fields

Wang,

Miao,

Guo

et al. 2024

Preprint

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Efficient nutrient management is imperative to control nutrient losses from farmland in the Erhai Lake Basin (ELB). To address this, a two-year field experiment (2021–2022) was conducted in the northern part of the ELB. The study aimed to quantify the impact of various fertilization treatments on nitrogen (N) and phosphorus (P) losses. The four fertilizer treatments included: no fertilizer (CK), farmer’s fertilizer-purely organic fertilization (FP), chemical fertilizer (CF), and a combination of organic and inorganic fertilizers (OIC). The OIC treatment significantly decreased N losses throughout the entire flue-cured tobacco season compared to the FP treatment, reducing TN runoff losses by 2.68 kg ha− 1 and TP runoff losses by 0.10 kg ha− 1. For leaching losses, the OIC treatment demonstrated a reduction of 21.3% in total N (TN) losses and 17.3% in total P (TP) losses compared to the purely organic fertilization treatments. Regarding yield and economic, the two-year average yield of the OIC treatment was 2573.93 kg ha− 1, a 3.8% increase compared to the FP treatment, accompanied by a significant rise in economic value. Correlation analysis revealed that soil available N and soil water content were key factors significantly influencing TN and TP runoff losses. These findings offer a theoretical foundation for the control of nutrient losses in farmland in the ELB.

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“…In addition to integrating four easily accessible ecological evaluation indicators, namely green, dry, wet and heat, the RSEI also uses a Principal Component Analysis (PCA) to automatically and objectively weight each indicator. There have been numerous studies using this method to quantify and accurately evaluate EQ [9], such as those conducted in watersheds [10][11][12], mining areas [13,14], wetlands [15,16], cities [17][18][19][20], etc.…”

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Dynamic Evolution and Correlation of Ecological Quality and Ecosystem Service Value in Fujian Province

Zheng,

Jin,

Huang

et al. 2024

Sustainability

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To promote sustainable development and improve human well-being, understanding how ecological quality influences ecosystem service value is essential. In this study, we quantified the ecological quality and ecosystem service value in Fujian Province from 2000 to 2021 using the Remote-Sensing Ecological Index (RSEI) and the Equivalent Factor Approach, respectively. This analysis aimed to examine their spatial and temporal dynamic evolution and to explore the correlation between the two. The results indicate that the temporal and spatial patterns of ecological quality and ecosystem service value in Fujian Province from 2000 to 2021 were similar, with both showing fluctuating upward trends over time. The spatial distributions were high in central and northern Fujian and low in the southeastern coastal areas. The Pearson correlation analysis revealed reveals a significant positive correlation between the RSEI and ecosystem service value (r = 0.673, p < 0.01), suggesting a synergistic relationship. The highest correlation was observed between the supporting service value and the RSEI indicators (|r| = 0.449–0.815, p < 0.01), and between the NDVI and the supporting service value (r = 0.815, p < 0.01). The spatial autocorrelation analysis also showed that ecological quality and ecosystem service value were positively correlated spatially, with high–high agglomerations concentrated in northwest and central Fujian, and low–low agglomerations in the coastal area of south Fujian.

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

Cited by 14 publications

References 64 publications

Eco-environmental changes due to human activities in the Erhai Lake Basin from 1990 to 2020

Eco-environmental changes due to human activities in the Erhai Lake Basin from 1990 to 2020

Optimizing nutrient management to improve tobacco quality while reducing nutrient losses in tobacco fields

Spatial and Temporal Dynamic Evolution and Correlation of Ecological Quality and Ecosystem Service Value in Fujian Province

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