Joint forcing by heat waves and mowing poses a threat to grassland ecosystems: Evidence from a manipulative experiment

doi:10.1002/ldr.3483

	Joint forcing by heat waves and mowing poses a threat to grassland ecosystems: Evidence from a manipulative experiment
	Qu, Luping 3; Dong, Gang 1,4,5; De Boeck, Hans J.6; Tian, Li 7; Chen, Jiquan 2; Tang, Huajun 4,5; Xin, Xiaoping 4,5; Chen, Jinqiang 4,5; Hu, Yalin 3; Shao, Changliang 4,5
刊名	LAND DEGRADATION & DEVELOPMENT
	2019-12-11
页码	16
关键词	climatic extremes steppe clipping plant community phenology
ISSN号	1085-3278
DOI	10.1002/ldr.3483
通讯作者	Shao, Changliang(shaochangliang@caas.cn)
英文摘要	The frequency and intensity of heat waves (HWs) have increased in recent years, but it remains unclear how grassland ecosystems respond to such extreme weather. A 3-year manipulative field experiment was conducted to simulate HWs under different mowing intensities in a Stipa krylovii steppe on the Mongolian Plateau to examine their effects on plant morphology, phenology, and community. At the species level, the morphology and phenology of the three main herb species (S. krylovii, Melilotoides ruthenica, and Potentilla tanacetifolia) showed species-specific responses to the HW and mowing treatments. The major dominant species S. krylovii shed 50% of the tiller outer layer to protect the internal tiller from HW stress thereby directly decreasing the heat load and water loss from green plant tissue and indirectly increasing the litter biomass. HWs also caused increases of community index (richness, diversity, and evenness) but also associated with a 30% decrease in the importance value of S. krylovii, whereas mowing enhanced this value by 27%. When HWs were combined with mowing, the joint forcing of mechanical damage and low carbon accumulation aggravated negative effects of stress on plant health and growth, which further decreased community index. We constructed a framework to fully describe the effects of HWs and mowing and their interrelationship on different ecological levels and explain how short-term effects, such as extreme climate, produce long-term effects on ecosystems. In conclusion, we found that synergisms between climate extremes (HWs) and human activities (mowing) can reduce ecosystem stability posing a threat to the grasslands.
资助项目	China Postdoctoral Science Foundation[2018M632560] ; China Postdoctoral Science Foundation[2018 M632560] ; National Natural Science Foundation of China[31800512] ; National Natural Science Foundation of China[31870466] ; US-China Carbon Consortium ; Major State Research Development Program of China[2016YFC0500600] ; Major State Research Development Program of China[2017YFE0104500]
WOS关键词	CLIMATE-CHANGE ; REPRODUCTIVE PHENOLOGY ; NITROGEN ADDITION ; ELEVATED CO2 ; PRIMARY PRODUCTIVITY ; FLOWERING PHENOLOGY ; SPECIES RICHNESS ; PLANT PHENOLOGY ; RESPONSES ; DROUGHT
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
语种	英语
出版者	WILEY
WOS记录号	WOS:000501998000001
资助机构	China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; US-China Carbon Consortium ; Major State Research Development Program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/130345]
专题	中国科学院地理科学与资源研究所
通讯作者	Shao, Changliang
作者单位	1.Shanxi Univ, Sch Life Sci, Taiyuan 030006, Shanxi, Peoples R China 2.Michigan State Univ, Ctr Global Changes & Earth Observat, Dept Geog Environm & Spatial Sci, E Lansing, MI 48823 USA 3.Fujian Agr & Forestry Univ, Coll Forestry, Forest Ecol Stable Isotope Ctr, Fuzhou 350002, Fujian, Peoples R China 4.Chinese Acad Agr Sci, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 100081, Peoples R China 5.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China 6.Univ Antwerp, Ctr Excellence Plants & Ecosyst, Dept Biol, Campus Drie Eiken, B-2610 Antwerp, Belgium 7.Chinese Acad Sci, Qianyanzhou Ecol Res Stn, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Qu, Luping,Dong, Gang,De Boeck, Hans J.,et al. Joint forcing by heat waves and mowing poses a threat to grassland ecosystems: Evidence from a manipulative experiment[J]. LAND DEGRADATION & DEVELOPMENT,2019:16.
APA	Qu, Luping.,Dong, Gang.,De Boeck, Hans J..,Tian, Li.,Chen, Jiquan.,...&Shao, Changliang.(2019).Joint forcing by heat waves and mowing poses a threat to grassland ecosystems: Evidence from a manipulative experiment.LAND DEGRADATION & DEVELOPMENT,16.
MLA	Qu, Luping,et al."Joint forcing by heat waves and mowing poses a threat to grassland ecosystems: Evidence from a manipulative experiment".LAND DEGRADATION & DEVELOPMENT (2019):16.