干旱区生态环境知识资源中心(Arid): 刈割降低热浪对内蒙古草甸草原碳通量的影响

Arid

	刈割降低热浪对内蒙古草甸草原碳通量的影响
其他题名	Mowing reduces the effect of heat wave on carbon flux of meadow grassland
	董校兵; 曲鲁平; 董刚; 童琦; 邵长亮
来源期刊	生态学报
ISSN	1000-0933
出版年	2021
卷号	41 期号:17 页码:6836-6845
中文摘要	热浪(Heat waves)是近年来频发的一种极端气候,其短期时间会影响生态系统植被健康并对生态系统碳通量产生长期负面影响,但其影响强度往往因生态系统类型而异。而内蒙古高原草甸草原属高纬度半干旱生态脆弱区,受气候变化影响显著,且正在遭受频繁热浪侵袭。在内蒙古呼伦贝尔草甸草原进行为期2年的野外原位模拟热浪控制实验,关注热浪对生态系统碳循环关键过程的影响和调节机制,并研究人类活动(刈割)与极端气候(热浪)对草甸草原碳通量的交互作用。结果表明,热浪处理显著降低了生态系统的土壤含水量,并显著降低草甸草原净碳交换(NEE)、生态系统呼吸(Re)和生态系统总生产力(GEP),分别为31%、1%和14%。然而,刈割处理下,能够有效降低热浪的负面影响,表现为热浪后草地恢复所需时间缩短了约1/3。同时,热浪后水分供给能缓解热浪对生态系统碳通量的滞后效应,并缩短生态系统所需的恢复时间。
英文摘要	Heat wave(HW)is a type of extreme climate that has been occurring frequently in recent years.It affects the vegetation health of ecosystem in the short term and has the long-term negative influence on ecosystem carbon flux,but the intensity of its influence tends to vary depending on the type of ecosystem.The meadow grassland of the Inner Mongolia Plateau is a high-latitude semi-arid ecologically fragile area,which is significantly affected by climate change and is suffering from frequent heat wave.Therefore,this study conducted a two-year in-situ simulated heat wave control experiment in Hulunbuir meadow grassland of theInner Mongolia,focusing on the influence of heat wave on key processes of ecosystem's carbon cycle and the regulatory mechanism,and studying the interaction between human activities(mowing)and extreme climate(heat wave)on meadow grassland carbon flux.The results showed that heat wave treatment significantly reduced the soil water content of ecosystem,as well as net carbon exchange(NEE),ecosystem respiration(Re)and gross ecosystem productivity(GEP)of meadow grassland by 31%,1% and 14%,respectively.However,the mowing treatment can effectively reduce the negative influence of heat wave,which is reflected in that time required for grassland recovery after the heat wave is shortened by 1/3.Meanwhile,water supply after heat wave can alleviate the legacy effect of heat wave on ecosystem carbon flux and shorten the recovery time of ecosystem.
中文关键词	热浪 ; 刈割 ; 碳通量 ; 生态系统净碳交换(NEE) ; 生态系统呼吸(Re) ; 生态系统总生产力(GEP)
英文关键词	heat wave mowing carbon flux net ecosystem carbon exchange(NEE) ecosystem respiration(Re) gross ecosystem productivity(GEP)
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7056227
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377843
作者单位	董校兵, 中国农业科学院,农业资源与农业区划研究所, 北京 100081, 中国.; 童琦, 中国农业科学院,农业资源与农业区划研究所, 北京 100081, 中国.; 邵长亮, 中国农业科学院,农业资源与农业区划研究所, 北京 100081, 中国.; 曲鲁平, 福建农林大学,林学院,森林生态稳定同位素研究中心, 福州, 福建 350002, 中国.; 董刚, 山西大学,生命科学学院, 太原, 山西 030002, 中国.
推荐引用方式 GB/T 7714	董校兵,曲鲁平,董刚,等. 刈割降低热浪对内蒙古草甸草原碳通量的影响[J],2021,41(17):6836-6845.
APA	董校兵,曲鲁平,董刚,童琦,&邵长亮.(2021).刈割降低热浪对内蒙古草甸草原碳通量的影响.生态学报,41(17),6836-6845.
MLA	董校兵,et al."刈割降低热浪对内蒙古草甸草原碳通量的影响".生态学报 41.17(2021):6836-6845.