干旱区生态环境知识资源中心(Arid): The legacy effects of grazing and precipitation variability on grassland productivity in a temperate steppe

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DOI	10.1016/j.agrformet.2023.109788
	The legacy effects of grazing and precipitation variability on grassland productivity in a temperate steppe
	Zhang, Feng; Zheng, Jiahua; Bennett, Jonathan A.; Zhang, Bin; Wang, Zhongwu; Li, Zhiguo; Li, Haigang; Wang, Jing; Han, Guodong; Zhao, Mengli
通讯作者	Han, GD ; Zhao, ML
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2023
卷号	343
英文摘要	Livestock grazing have been observed to influence plant productivity and community composition in a variety of grassland ecosystems. However, it is still unclear how the influence of grazing might be exaggerated or mediated by the environment, and particularly by annual precipitation. We conducted a fourteen-year grazing experiment to compare the influence of traditional grazing regime against a no grazing treatment on previously grazed plots. Removing grazing pressure increased plant aboveground net primary productivity [ANPP] across the whole community. This increase was driven by increases in productivity in forbs, potentially due to relaxing herbivory pressure normally brought on by grazing. On average, net primary productivity increased across the entire plant community when grazing pressures were released, though there was not a significant increase in productivity of graminoids. We did observe, however, that a lack of grazing could decrease the ANPP of graminoids, potentially by allowing for a greater competitive influence of forbs. Removing grazing increased the logarithmic response ratios [LRRs] of both the whole community and forbs, regardless of precipitation. Current-year community-wide ANPP [ANPPn] was positively associated with current-year precipitation [PPTn] in both grazed and un-grazed fields, and we considered this to be largely driven by a positive relationship between rainfall and forb productivity. Interestingly, grazing alone did not influence the LRRs of graminoids over time, potentially suggesting that the long-term legacy influence of past grazing regimes is of greater importance than the acute grazing conducted during the experiment. We did find, however, that precipitation had variable influence on the relationship between grazing and LRR of graminoids. The removal of grazing was a more powerful influence on graminoid LRR during wetter years. We also found that the ANPPn of graminoids was positively associated with both PPTn and prior-year ANPP [ANPP (n-1)] of graminoids in both grazed and un-grazed fields, potentially due to its asexual reproduction via belowground meristems. Our results suggest that forbs are more sensitive to grazing and precipitation variability than graminoids, and cessation of grazing may be an appropriate management regime to increase community productivity and potentially associated ecosystem functions to prevent further grassland degradation.
英文关键词	Grazing Precipitation variability Grasslands Graminoids Forbs Legacy effect
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001194875500001
WOS关键词	ECOSYSTEM CARBON ; PLANT DIVERSITY ; USE EFFICIENCY ; DESERT STEPPE ; DROUGHT ; SOIL ; VEGETATION ; RESPONSES ; IMPACTS ; DESERTIFICATION
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395012
推荐引用方式 GB/T 7714	Zhang, Feng,Zheng, Jiahua,Bennett, Jonathan A.,et al. The legacy effects of grazing and precipitation variability on grassland productivity in a temperate steppe[J],2023,343.
APA	Zhang, Feng.,Zheng, Jiahua.,Bennett, Jonathan A..,Zhang, Bin.,Wang, Zhongwu.,...&Zhao, Mengli.(2023).The legacy effects of grazing and precipitation variability on grassland productivity in a temperate steppe.AGRICULTURAL AND FOREST METEOROLOGY,343.
MLA	Zhang, Feng,et al."The legacy effects of grazing and precipitation variability on grassland productivity in a temperate steppe".AGRICULTURAL AND FOREST METEOROLOGY 343(2023).