Evaluation on carbon storage function under different rocky desertification control models in Jianshui County of Yunnan Province, southwestern China

ObjectiveThe change of land use resulted from comprehensive rocky desertification control model has caused changes of soil respiration and vegetation on land surface, which will further affect the carbon storage function of ecosystem. This paper aims to reveal the impact of comprehensive rocky desertification control models on carbon storage function under different developing models.

Methodthis paper takes Jianshui County of Yunnan Province, southwestern China as a case to simulate and predict the impacts of land use change on carbon storage under three developing scenarios (rapid development, rocky desertification control and planning development)in the next 10 years, which was carried out by InVEST combined with Dyna-CLUE models, taking year 2015 as base period.

ResultThe results showed that: (1)under the rocky desertification control scenario, the area of arbor forest, land used for building, orchard and water area in 2025 all increased to some extent compared with 2015; while the area of unused land, farmland, grassland and shrub land all decreased. Under the rapid development scenario, compared with year 2015, the area of farmland, orchard, land used for building, arbor forest, and water area all increased; the area of unused land, shrub land and grassland all decreased to some extent. Under the planning development scenario, compared with year 2015, the area of farmland, orchard, grassland, land used for building, shrub land, and water area all increased; while the area of unused land and arbor forest decreased somewhat. (2)In 2025, the carbon storage will be 318.72 ×10⁵ t in Jianshui County under the scenario of rocky desertification control, increased by 23.94 ×10⁵ t compared with 2015. This scenario provided the most carbon storage for the study area. Under rapid development scenario, the total carbon storage will be 301.07 ×10⁵ t, increased by 6.29 ×10⁵ t compared with 2015. While under the planning development scenario, the total carbon storage will be 284.89×10⁵ t, which was 9.89×10⁵ t lower than 2015.

ConclusionThe study reflects the impact of different scenarios of comprehensive rocky desertification control on land use patterns and their carbon storage services in karst ecosystems. It can provide a reference for determination of the regional development model of government managers and implementation of the stratagem of rocky desertification control by stakeholders.