Spatial-temporal variations of carbon storage and carbon sequestration rate in China’s national forest parks

doi:10.13287/j.1001-9332.202103.015

Abstract

Abstract: Forests play an important role in regulating climate change and maintaining carbon balance. To explore the carbon storage and carbon sequestration rate of national forest parks is of great significance for carbon sequestration capacity assessment and sustainable forest management. A process-based ecosystem model (CEVSA2 model) was used to simulate the spatial distribution of carbon density, carbon storage and carbon sequestration rate of 881 national forest parks in China during 1982-2017. The results showed that the average carbon density of national forest parks was 255.18 t C·hm^-2, being higher than the average carbon density of forest ecosystem in China. In 2017, the total carbon storage of national forest parks increased to 3.56 Pg C, accounting for 11.0%-12.2% of the total carbon storage in national forest ecosystems. During 1982-2017, the average carbon sequestration rate of national forest parks reached 0.45 t C·hm^-2·a^-1, and the carbon sequestration rate of all national forest parks was above 0.30 t C·hm^-2·a^-1. National forest parks in the northeast and southwest of China had the highest total carbon storage. The national forest parks in northeast of China had the highest soil organic carbon sequestration rate, while those in eastern China and central southern China had the highest biomass carbon sequestration rate. The area of national forest parks accounted for 5.8% of the total forest area of China, playing an important role in forest carbon sink management of China. Accurate assessment of the growth status, carbon sequestration potential and carbon absorption characteristics of national forest parks could provide reference for the comprehensive assessment of ecosystem service of forest parks in China.

Key words: national forest park, carbon density, carbon storage, carbon sequestration rate, process-based ecosystem model

LI Wei, HUANG Mei, ZHANG Yuan-dong, GU Feng-xue, GONG He, GUO Rui, ZHONG Xiu-li, YAN Chang-rong. Spatial-temporal variations of carbon storage and carbon sequestration rate in China’s national forest parks[J]. Chinese Journal of Applied Ecology, 2021, 32(3): 799-809.

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