###### Abstract
Assessment methods are mainly the attempts of the market value method, carbon tax method, shadow engineering method, ESV coefficient method, travel cost method, and questionnaire survey method [24; 25; 26; 27; 28; 29]. For example, [PERSON] et al. analyzed the spatial and temporal evolution of the ESV in the lower reaches of the Yellow River [30], and [PERSON] et al. explored the gradient effect of ecosystem services in the transition zone of Beijing Bay [31]. At present, studies on the value of ecosystem services are not only numerous, but also all have good achievements, which can serve as a basic reference for the management and protection of the regional ecological environment. However, there have been few analyses comparing the evolution of spatial and temporal patterns of the ESV over long periods of time in different geographic regions from a spatial perspective. Geomorphology is a component element of the natural geographical environment and a carrier of ecosystem services. Together, geomorphology and human beings have a comprehensive impact on the spatial and temporal patterns of ecosystem types and are closely related to the total and distribution of the ESV [32; 33; 34]. After a symposium on geomorphology and ecosystems held in Binghamton, USA concluded that integrating landform and ecosystem ecology is a key issue for future research [35], the study of the ESV of geomorphological types has become particularly important. However, current studies on different landform types have mostly focused on the evolution of vegetation cover [36], soil erosion characteristics, and land cover change [37; 38], while research on the ESV of different landform types needs to be further developed, especially in the context of different karst landforms. Due to its special geological background and hydrological structure in Guizhou Province [39], there is a fragile environmental ecosystem background with a wide distribution of pure carbonate rocks, impure carbonate rocks, and carbonate and non-carbonate rock interlayers [40], and the karst landform is strongly developed. With the deepening research, scholars have found that due to the internal geological differences in karst, under the action of external forces such as flowing water and gravity, the karst surface morphology, biological growth conditions, and land-use patterns will be different, leading to different ecosystem patterns in different regions [41], and ultimately affecting the space-time law of the ESV in karst landform areas. Existing studies on the value of ecosystem services mostly treat the whole study area as a pure-karst or non-karst landform type [42; 43]. In addition, there is a lack of research differentiating and comparing the difference in ESV in karst landform areas, which means that the spatial-temporal evolution law of the ESV cannot be directly revealed in various karst landform areas. Therefore, in order to further clarify the internal differences in ESV in karst landform areas, we propose the use of Guizhou Province as the scope of research, and conducted the following main studies based on the division of different karst landform areas. First, we analyzed the characteristics of the spatial and temporal patterns of the ESV in Guizhou Province from 1985 to 2020. Second,we compared the spatial and temporal patterns of the ESV in different karst-landform-type areas. Finally, we explored the differences in the ESV across the topographic gradients in each karst landform area. While enriching the study of the ESV in karst ecologically fragile areas, we expect to provide references for differential refinement management and sustainable development of the grand ecological strategy in Guizhou Province.