气候变化领域集成服务门户(CCPortal): One hundred and six years of change in a Sonoran Desert plant community: Impact of climate anomalies and trends in species sensitivities

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DOI	10.1002/ecy.4194
	One hundred and six years of change in a Sonoran Desert plant community: Impact of climate anomalies and trends in species sensitivities
	Brown, Charlotte; Buritica, Susana Rodriguez; Goldberg, Deborah E.; Reichenbacher, Frank; Venable, D. Lawrence; Webb, Robert H.; Wilder, Benjamin T.
发表日期	2024
ISSN	0012-9658
EISSN	1939-9170
起始页码	105
结束页码	3
卷号	105 期号:3
英文摘要	A major restriction in predicting plant community response to future climate change is a lack of long-term data needed to properly assess species and community response to climate and identify a baseline to detect climate anomalies. Here, we use a 106-year dataset on a Sonoran Desert plant community to test the role of extreme temperature and precipitation anomalies on community dynamics at the decadal scale and over time. Additionally, we tested the climate sensitivity of 39 desert plant species and whether sensitivity was associated with growth form, longevity, geographic range, or local dominance. We found that desert plant communities had shifted directionally over the 106 years, but the climate had little influence on this directional change primarily due to nonlinear shifts in precipitation anomalies. Decadal-scale climate had the largest impact on species richness, species relative density, and total plant cover, explaining up to 26%, 45%, and 55% of the variance in each, respectively. Drought and the interaction between the frequency of freeze events and above-average summer precipitation were among the most influential climate factors. Increased drought frequency and wetter periods with frequent freeze events led to larger reductions in total plant cover, species richness, and the relative densities of dominant subshrubs Ambrosia deltoidea and Encelia farinosa. More than 80% of the tested species were sensitive to climate, but sensitivity was not associated with a species' local dominance, longevity, geographic range, or growth form. Some species appear to exhibit demographic buffering, where when they have a higher sensitivity to drought, they also tend to have a higher sensitivity to favorable (i.e., wetter and hotter) conditions. Overall, our results suggest that, while decadal-scale climate variation substantially impacts these desert plant communities, directional change in temperature over the last century has had little impact due to the relative importance of precipitation and drought. With projections of increased drought in this region, we may see reductions in total vegetation cover and species richness due to the loss of species, possibly through a breakdown in their ability to demographically buffer climatic variation, potentially changing community dynamics through a change in facilitative and competitive processes.
英文关键词	arid lands; climate anomaly; community structure; dominance; drought; extreme temperature; geographic range; growth form; longevity; long-term change; seasonal precipitation; species-specific response
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology
WOS记录号	WOS:001158668400001
来源期刊	ECOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305893
作者单位	University of Arizona; University of Sherbrooke; University of Arizona; University of Michigan System; University of Michigan; University of Arizona
推荐引用方式 GB/T 7714	Brown, Charlotte,Buritica, Susana Rodriguez,Goldberg, Deborah E.,et al. One hundred and six years of change in a Sonoran Desert plant community: Impact of climate anomalies and trends in species sensitivities[J],2024,105(3).
APA	Brown, Charlotte.,Buritica, Susana Rodriguez.,Goldberg, Deborah E..,Reichenbacher, Frank.,Venable, D. Lawrence.,...&Wilder, Benjamin T..(2024).One hundred and six years of change in a Sonoran Desert plant community: Impact of climate anomalies and trends in species sensitivities.ECOLOGY,105(3).
MLA	Brown, Charlotte,et al."One hundred and six years of change in a Sonoran Desert plant community: Impact of climate anomalies and trends in species sensitivities".ECOLOGY 105.3(2024).