摘要
以大兴安岭呼中林区不同强度的火烧迹地为研究对象,对森林地上植被(乔木层、灌木层和草本层)碳储量进行分层采样,采用异速生长方程和生物量收获法获得各层生物量并转换为碳储量,分析了不同火烧强度下研究区地上植被碳储量的差异.结果表明:火烧强度显著影响研究区森林地上植被碳储量,表现为未火烧>轻度火烧>中度火烧>重度火烧.相同火烧强度下,各林层碳储量变化状况表现为乔木层>灌木层>草本层.乔木层碳储量在不同火烧强度下表现为未火烧>轻度火烧>中度火烧>重度火烧;灌木层碳储量在不同火烧强度下表现为轻度火烧>未火烧>中度火烧>重度火烧;草本层的碳储量在不同火烧强度下表现为轻度火烧>未火烧>重度火烧>中度火烧.火烧强度显著影响森林生态系统乔木层和草本层的碳储量,对灌木层碳储量的影响不显著.
Forest aboveground vegetation （trees, shrub, and grass） was sampled in the Huzhong forest region of the Great Xing＇ an Mountains under different fire severities. The allometric-equation and biomass-harvesting methods were employed to derive biomasses of tree, shrub, and grass lay- ers, which were subsequently converted to carbon storage, The differences of carbon storage （tree, shrub, and grass layers） under different fire severities were analyzed. Results showed that fire se- verities significantly affected the aboveground carbon storage. The carbon storage was ranked in the order of unbumed〉low-severity〉moderate-severlty〉high-severity. At the same fire severity, the for- est carbon storage was generally ranked in the order of tree〉grass〉shrub. At the different fire severi- ties, the carbon storage was ranked in the order of unburned〉low-severity〉moderate-severity〉high- severity. The shrub layer carbon storage was ranked in the order of low-severity〉unburned〉moder- ate-severity〉high-severity. The grass layer carbon storage was ranked in the order of low-severity〉 unburned〉high-severity〉moderate-severity. The fire severities significantly affected carbon storage of tree and grass layers. The effect of fire severities on carbon storage in shrub layer was not signifi- cant.
出处
《应用生态学报》
CAS
CSCD
北大核心
2017年第8期2481-2487,共7页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目(41201185)
辽宁省自然科学基金项目(201602513)
沈阳市科技计划项目(F16-158-9-00)资助~~
关键词
火干扰
火烧强度
地上碳储量
大兴安岭
fire disturbance
fire severity
aboveground carbon storage
Great Xing＇ an Mountains
