DOI: 10.1111/gcb.13865
Scopus记录号: 2-s2.0-85041312889
论文题名: Direct and indirect effects of episodic frost on plant growth and reproduction in subalpine wildflowers
作者: Pardee G.L. ; Inouye D.W. ; Irwin R.E.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 2 起始页码: 848
结束页码: 857
语种: 英语
英文关键词: climate change
; frost
; phenology
; plant reproduction
; plant–pollinator interactions
; pollination services
Scopus关键词: aboveground production
; angiosperm
; climate change
; climate effect
; ecosystem response
; frost
; growth response
; mountain region
; phenology
; plant
; plant-pollinator interaction
; reproductive behavior
; Colorado
; United States
; Asteraceae
; Delphinium
; Delphinium barbeyi
; Erigeron
; Erigeron speciosus
; Magnoliophyta
; Polemoniaceae
; Polemonium
; Polemonium foliosissimum
; Ranunculaceae
英文摘要: Frost is an important episodic event that damages plant tissues through the formation of ice crystals at or below freezing temperatures. In montane regions, where climate change is expected to cause earlier snow melt but may not change the last frost-free day of the year, plants that bud earlier might be directly impacted by frost through damage to flower buds and reproductive structures. However, the indirect effects of frost mediated through changes in plant–pollinator interactions have rarely been explored. We examined the direct and pollinator-mediated indirect effects of frost on three wildflower species in southwestern Colorado, USA, Delphinium barbeyi (Ranunculaceae), Erigeron speciosus (Asteraceae), and Polemonium foliosissimum (Polemoniaceae), by simulating moderate (−1 to −5°C) frost events in early spring in plants in situ. Subsequently, we measured plant growth, and upon flowering measured flower morphology and phenology. Throughout the flowering season, we monitored pollinator visitation and collected seeds to measure plant reproduction. We found that frost had species-specific direct and indirect effects. Frost had direct effects on two of the three species. Frost significantly reduced flower size, total flowers produced, and seed production of Erigeron. Furthermore, frost reduced aboveground plant survival and seed production for Polemonium. However, we found no direct effects of frost on Delphinium. When we considered the indirect impacts of frost mediated through changes in pollinator visitation, one species, Erigeron, incurred indirect, negative effects of frost on plant reproduction through changes in floral traits and pollinator visitation, along with direct effects. Overall, we found that flowering plants exhibited species-specific direct and pollinator-mediated indirect responses to frost, thus suggesting that frost may play an important role in affecting plant communities under climate change. © 2017 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110542
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Applied Ecology, North Carolina State University, Raleigh, NC, United States; Rocky Mountain Biological Laboratory, Gothic, CO, United States; Department of Biology, University of Maryland, College Park, MD, United States
Recommended Citation:
Pardee G.L.,Inouye D.W.,Irwin R.E.. Direct and indirect effects of episodic frost on plant growth and reproduction in subalpine wildflowers[J]. Global Change Biology,2018-01-01,24(2)