生态学报2017，Vol.37Issue(13)：4392-4399,8.DOI:10.5846/stxb201603110430
放牧对新疆草地生态系统碳源/汇的影响模拟研究
Modeling the grazing effect of grassland on the carbon source/sink in Xinjiang
摘要
Abstract
Identifying the carbon source/sink strength of grassland ecosystems in Xinjiang is of great importance for the regional carbon cycle.Using the modified Biome-BGC grazing model,we modeled carbon dynamics in grasslands in Xinjiang,northwest China with varying grazing intensities.In general,the regional simulation estimated that the grassland ecosystems in Xinjiang acted as a net carbon source,with a value of 0.38 Pg during the period 1979-2007,of which 0.37 Pg was caused by grazing.In general,the strength of carbon sequestration improved when grazing intensity was less than 0.24 head/hm2.However,the over-compensation effect may also be the result of the growth of poisonous grass.Therefore,in the future,by adding the "vegetation succession" module,we should improve the Biome-BGC grazing model to study the compensation effect more intensively.Our findings have implications for grassland ecosystem management as they relate to carbon sequestration and climate change mitigation,e.g.,removal of grazing should be considered in strategies that aim to increase terrestrial carbon sequestrations at local and regional scales.We anticipate that our study will emphasize the need for large-scale assessments of how grazing affects carbon cycling.关键词
新疆/草地生态系统/放牧/碳源/汇Key words
Xinjiang/grassland ecosystem/grazing/carbon source/sink引用本文复制引用
韩其飞,罗格平,李超凡,黄晓东..放牧对新疆草地生态系统碳源/汇的影响模拟研究[J].生态学报,2017,37(13):4392-4399,8.基金项目
草地农业生态系统国家重点实验室开放课题(SKLGAE201510) （SKLGAE201510）
国家自然科学基金项目(41501098,41271126) （41501098,41271126）
南京信息工程大学人才启动基金资助(2241041301130-2014r068) （2241041301130-2014r068）
