林线树种太白红杉碳储量估算

Carbon Storage Estimation of Timberline Tree Larix Chinensis

林线对气候变化十分敏感,有关环境如何影响林线植被碳储量分布的研究鲜见报道.采用野外调查、遥感影像解译和生物量模型计算相结合的方法,对秦岭主峰太白山林线树种——太白红杉(Larix chinensis)碳储量、碳密度及其分布进行了估算.结果表明:太白红杉林总碳储量为5.290×105 t,其中南坡碳储量为1.765×105 t,北坡碳储量为3.525×105 t,南北坡碳储量分布不均与太白红杉分布面积和海拔有很大的关系;太白红杉林碳密度为0～17.40 kg/m2,平均值为(7.65±4.15)kg/m2,与年均温度呈正相关,与海拔和年降水量呈负相关,温度是影响太白红杉林碳密度的关键因素.

Timberline is very sensitive to climate change.However,few studies have been performed on how the environment affects the distribution of carbon storage of timberline vegetation.Based on a field survey and remote sensing imagery,we estimated the carbon storage,carbon density,and distribution of Larix chinensis,a timberline tree species on Taibai Mountain in the highest peak in Qinling;these results were combined with biomass estimation model of Larix chinensis.The results showed that the total carbon storage of L.chinensis was 5.290 × 105 t,of which the carbon storage was 1.765 × 105 t along the southern slope and 3.525 × 105 t along the northern slope.The difference of the carbon storage between the northern slope and the southern slope was determined by elevation and distribution area of L.chinensis.The carbon density of L.chinensis was 0-17.40 kg /m2,with the average value of（7.65 ± 4.15） kg /m2.The carbon density had positive correlation with annual average temperature and negative correlation with both annual average precipitation and altitude.Temperature was an essential factor to the carbon density of L.chinensis.