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Joint forcing by heat waves and mowing poses a threat to grassland ecosystems: Evidence from a manipulative experiment
Qu, Luping1; Dong, Gang2,3,7; De Boeck, Hans J.4; Tian, Li5; Chen, Jiquan6; Tang, Huajun2,3; Xin, Xiaoping2,3; Chen, Jinqiang2,3; Hu, Yalin1; Shao, Changliang2,3
2019-12-11
Source PublicationLAND DEGRADATION & DEVELOPMENT
ISSN1085-3278
Pages16
Corresponding AuthorShao, Changliang(shaochangliang@caas.cn)
AbstractThe 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.
Keywordclimatic extremes steppe clipping plant community phenology
DOI10.1002/ldr.3483
WOS KeywordCLIMATE-CHANGE ; REPRODUCTIVE PHENOLOGY ; NITROGEN ADDITION ; ELEVATED CO2 ; PRIMARY PRODUCTIVITY ; FLOWERING PHENOLOGY ; SPECIES RICHNESS ; PLANT PHENOLOGY ; RESPONSES ; DROUGHT
Indexed BySCI
Language英语
Funding ProjectChina 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]
Funding OrganizationChina Postdoctoral Science Foundation ; National Natural Science Foundation of China ; US-China Carbon Consortium ; Major State Research Development Program of China
WOS Research AreaEnvironmental Sciences & Ecology ; Agriculture
WOS SubjectEnvironmental Sciences ; Soil Science
WOS IDWOS:000501998000001
PublisherWILEY
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/130346
Collection中国科学院地理科学与资源研究所
Corresponding AuthorShao, Changliang
Affiliation1.Fujian Agr & Forestry Univ, Coll Forestry, Forest Ecol Stable Isotope Ctr, Fuzhou 350002, Fujian, Peoples R China
2.Chinese Acad Agr Sci, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 100081, Peoples R China
3.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China
4.Univ Antwerp, Ctr Excellence Plants & Ecosyst, Dept Biol, Campus Drie Eiken, B-2610 Antwerp, Belgium
5.Chinese Acad Sci, Qianyanzhou Ecol Res Stn, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
6.Michigan State Univ, Ctr Global Changes & Earth Observat, Dept Geog Environm & Spatial Sci, E Lansing, MI 48823 USA
7.Shanxi Univ, Sch Life Sci, Taiyuan 030006, Shanxi, Peoples R China
Recommended Citation
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.
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