1977-2017年三江源区植被固碳量及影响因素评估  

Evaluation of Carbon Sequestration by Vegetation and Its Influencing Factors from 1977 to 2017 in the Three-River Source Region

作　　者：张宏思 陈之光 张翔[1] 张立峰[1] 古松[1] Zhang Hongsi;Chen Zhiguang;Zhang Xiang;Zhang Lifeng;Gu Song(College of Life Sciences,Nankai University,Tianjin 300071,China)

机构地区：[1]南开大学生命科学学院,天津300071

出　　处：《南开大学学报（自然科学版）》2021年第4期87-100,107,共15页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：第二次青藏高原综合科学考察研究(2019QZKK0106);国家自然科学基金(31570478)。

摘　　要：近年气候变化和人类活动对三江源生态环境产生了深刻的影响.植被固碳量是反应生态环境的重要指标.根据1977-2017年的气候资料,利用Thomthwaite Memonal模型分析了三江源地区植被固碳量变化,并探讨了气候因子和人类活动对其的影响.结果表明.研究期间的植被平均固碳量为1130.3 g·m^(2)·a^(-1),总体上呈从东南向西北逐渐减少的态势,降水量是影响固碳量的主要因子,且存在超前性.3-7月的降水量对固碳量的影响最大;研究期间的固碳量呈波动性增加趋势,主要是由于降水量的增加所导致.另外,21世纪后三江源实施的生态保护措施和政策对该区固碳量增加产生了一定的作用.In recent years,climate change and human activities have a profound influence on the ecological environment of Three-River Source Region(TRSR)in the Qinhai-Tibetan Plateau.Vegetation carbon sequestration is an important indicator for reflecting the ecological environment.This study analyzed the temporal and spatial variations of carbon sequestration by vegetation using Thomthwaite Memorial model based on the climate data from 1977 to 2017 in TRSR,and discussed the impacts of climate factors and human activities on carbon sequestration.The results showed that the average value of carbon sequestration by vegetation was 1130.29 g·m^(-2)·a^(-1)in TRSR during the study period,and overall with a gradual decreasing trend from southeast to northwest.Precipitation is the most important factor affecting the amount of carbon sequestration,it was found that precipitation was ahead of the carbon sequestration,and precipitation from March to July had the largest impact on carbon sequestration.The amount of carbon sequestration showed an increasing bend of volatility from 1977 to 2017 due to the increasing precipitation.In addition,into the 21st century,the ecological protection measures and policies implemented by the government in TRSR have a certain role in the increase in carbon sequestration in this area.

关 键 词：Thomthwaite Memorial模型 植被固碳 NPP 气候影响 人为影响 

分 类 号：Q948[生物学—植物学]