DOI: 10.1111/gcb.12208
论文题名: Annual plants change in size over a century of observations
作者: Leger E.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 7 起始页码: 2229
结束页码: 2239
语种: 英语
英文关键词: Blepharipappus scaber
; Climate change
; Collinsia parvitlora
; Cryptantha pterocarya
; Disturbance
; Eriastrum signatum
; Evolution
; Gilia inconspicua
; Mentzelia albicaulis
; Microsteris gracilis
; Plasticity
Scopus关键词: annual plant
; body size
; climate change
; climate effect
; community composition
; leaf area
; observational method
; plant community
; shoot growth
; temporal variation
; trend analysis
; warming
; adaptation
; angiosperm
; article
; climate change
; desert climate
; ecosystem
; environmental monitoring
; growth, development and aging
; methodology
; plant development
; season
; time
; United States
; Adaptation, Biological
; Angiosperms
; Climate Change
; Desert Climate
; Ecosystem
; Environmental Monitoring
; Plant Development
; Seasons
; Time Factors
; United States
; Great Basin
; United States
; Animalia
; Blepharipappus scaber
; Collinsia
; Cryptantha pterocarya
; Eriastrum
; Gilia inconspicua
; Mentzelia albicaulis
; Microsteris gracilis
英文摘要: Studies have documented changes in animal body sizes over the last century, but very little is known about changes in plant sizes, even though reduced plant productivity is potentially responsible for declines in size of other organisms. Here, I ask whether warming trends in the Great Basin have affected plant size by measuring specimens preserved on herbarium sheets collected between 1893 and 2011. I asked how maximum and minimum temperatures, precipitation, and the Pacific Decadal Oscillation (PDO) in the year of collection affected plant height, leaf size, and flower number, and asked whether changes in climate resulted in decreasing sizes for seven annual forbs. Species had contrasting responses to climate factors, and would not necessarily be expected to respond in parallel to climatic shifts. There were generally positive relationships between plant size and increased minimum and maximum temperatures, which would have been predicted to lead to small increases in plant sizes over the observation period. While one species increased in size and flower number over the observation period, five of the seven species decreased in plant height, four of these decreased in leaf size, and one species also decreased in flower production. One species showed no change. The mechanisms behind these size changes are unknown, and the limited data available on these species (germination timing, area of occupancy, relative abundance) did not explain why some species shrank while others grew or did not change in size over time. These results show that multiple annual forbs are decreasing in size, but that even within the same functional group, species may have contrasting responses to similar environmental stimuli. Changes in plant size could have cascading effects on other members of these communities, and differential responses to directional change may change the composition of plant communities over time. © 2013 Blackwell Publishing Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62401
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Natural Resources and Environmental Science, University of Nevada, Reno, Mail Stop 186, 1664 N. Virginia Street, Reno, NV, 89509, United States
Recommended Citation:
Leger E.A.. Annual plants change in size over a century of observations[J]. Global Change Biology,2013-01-01,19(7)