[4] Magalhães J L L, José Leonardo Lima, Lopes M A et al. Development of a Flooded Forest Anthropization Index (FFAI) applied to Amazonian areas under pressure from different human activities[J]. Ecological Indicators, 48, 440-447(2015).

[5] Han Z, Cui B. Development of an integrated stress index to determine multiple anthropogenic stresses on macrophyte biomass and richness in ponds[J]. Ecological Engineering, 90, 151-162(2016).

[6] Sanderson E W, Jaiteh M, Levy M A et al. The human footprint and the last of the wild[J]. Bioscience, 52, 891-904(2002).

[7] Venter O, Sanderson E W, Magrach A et al. Sixteen years of change in the global terrestrial human footprint and implications for biodiversity conservation[J]. Nature Communications, 7, 12558(2016). https://www.ncbi.nlm.nih.gov/pubmed/27552116

[8] Van Beynen P, Townsend K. A disturbance index for karst environments[J]. Environmental Management, 36, 101-116(2005).

[9] Dodds W K, Perkin J S, Gerken J E. Human impact on freshwater ecosystem services: A global perspective[J]. Environmental Science & Technology, 47, 9061-9068(2013).

[10] Li S C, Zhang Y L, Wang Z F et al. Mapping human influence intensity in the Tibetan Plateau for conservation of ecological service functions[J]. Ecosystem Services, 30, 276-286(2018).

[15] Liu J Y, Liu M L, Tian H Q et al. Spatial and temporal patterns of China's cropland during 1990-2000: An analysis based on Landsat TM data[J]. Remote Sensing of Environment, 98, 442-456(2005).

[16] Liu J Y, Kuang W H, Zhang Z X et al. Spatiotemporal characteristics, patterns, and causes of land-use changes in China since the late 1980s[J]. Journal of Geographical Sciences, 24, 195-210(2014).

[18] Moran P A P. The interpretation of statistical maps[J]. Journal of the Royal Statistical Society B, 37, 243-251(1948).

[19] Moran P A P. Notes on continuous stochastic phenomena[J]. Biometrika, 37, 17-33(1950).

[20] Ord J K, Getis A. Local spatial autocorrelation statistics: Distribution issues and an application[J]. Geographical Analysis, 27, 286-306(1995).