PurposeTo explore the correlation between changes of land use landscape patterns and ecosystem carbon storage functions, providing a reference for maintaining the stability of small-scale regional ecosystem services.
MethodsTaking Liangwang Mountain County-level Nature Reserve in Yunnan Province as research area, the spatial-temporal features changes of land use pattern and carbon storage from 2000 to 2020 and the correlation between them were explored by landscape metrics evaluation method, InVEST carbon stock assessment model and grey relational grade analysis method.
Results1) During the 20-year period, the largest decrease area of land use was cultivated land, with a slight increase in construction land, forestland and grassland. Furthermore, type transfer mainly involved the mutual conversion among forestland, grassland, and cultivated land, while construction land mainly came from the transfer of forestland and grassland. 2) The landscape pattern generally became to be more complex and irregular, with increased fragmentation and relatively weaker heterogeneity. The landscape fragmentation in construction land and grassland increased obviously, while the connectivity of forestland patches increased, with the forestland’s largest patch index increased from 23.00 to 23.80. 3) The overall carbon storage increased from 227055.48 t to 227840.14 t. There were obvious spatial differences in carbon storage, and the high carbon storage areas were mainly concentrated in the northeast and central regions. 4) The correlation between landscape contagion index and total carbon storage was the highest, and the correlation coefficient reached 0.99.
ConclusionThe correlation between different landscape pattern indices and the ecosystem carbon storage is different in Liangwang Mountain County-level Nature Reserve. As the dominant landscape patch, the area of forestland is an important factor affecting the total carbon storage value of this reserve.
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