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	Interannual fluctuations in floral longevity, pollinator visitation and pollination limitation of an alpine plant (Gentiana straminea Maxim., Gentianaceae) at two altitudes in the Qinghai-Tibetan Plateau
	Duan, Y.-W.; Zhang, T.-F.; Liu, J.-Q.
	2007-09-01
发表期刊	PLANT SYSTEMATICS AND EVOLUTION
卷号	267期号:1-4页码:255-265
文章类型	Article
摘要	Prolonged floral longevity and bumblebees as dominate pollinators in alpine ecosystem have been suggested to overcome pollination limitation of alpine plants arising from the decrease of pollinator activity with increasing altitude. However, this conclusion has never been examined in the Qinghai-Tibetan Plateau (QTP), the highest and largest plateau in the world. In this study, we intended to test year-to-year correlations between floral longevity, visiting frequency and pollen limitation of this species between two populations (at 3200 m and 4000 m) of Gentiana straminea in this plateau. Pollinator exclusion elongated both male and female phases greatly at both sites, and durations of both male and female phases in natural condition varied greatly over three years. The visiting frequency of bumblebees varied greatly at the higher altitude, but seemed to be stable at the lower altitude. Seed production was pollination limited in both populations in most studied years. The floral durations, pollinator frequency and pollination limitation showed no significant and consistent variations with the increase of altitude. The previous hypothesis that the prolonged floral longevity of alpine plants can compensate for low levels of pollinator visitation therefore could not be confirmed, and our results further suggested that in the QTP platform, the altitude shows no consistent effect on the reproductive performance of this species, despite that the fluctuation of visit frequency intensified at the higher altitude.; Prolonged floral longevity and bumblebees as dominate pollinators in alpine ecosystem have been suggested to overcome pollination limitation of alpine plants arising from the decrease of pollinator activity with increasing altitude. However, this conclusion has never been examined in the Qinghai-Tibetan Plateau (QTP), the highest and largest plateau in the world. In this study, we intended to test year-to-year correlations between floral longevity, visiting frequency and pollen limitation of this species between two populations (at 3200 m and 4000 m) of Gentiana straminea in this plateau. Pollinator exclusion elongated both male and female phases greatly at both sites, and durations of both male and female phases in natural condition varied greatly over three years. The visiting frequency of bumblebees varied greatly at the higher altitude, but seemed to be stable at the lower altitude. Seed production was pollination limited in both populations in most studied years. The floral durations, pollinator frequency and pollination limitation showed no significant and consistent variations with the increase of altitude. The previous hypothesis that the prolonged floral longevity of alpine plants can compensate for low levels of pollinator visitation therefore could not be confirmed, and our results further suggested that in the QTP platform, the altitude shows no consistent effect on the reproductive performance of this species, despite that the fluctuation of visit frequency intensified at the higher altitude.
关键词	Visiting Frequency Bumblebee Pollination Pollination Limitation Alpine Plants
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
学科领域	植物学
关键词[WOS]	POLLEN LIMITATION ; REPRODUCTIVE SUCCESS ; SEED SET ; ECOLOGY ; ENVIRONMENT ; POLEMONIUM ; TRAITS ; SYSTEM
收录类别	SCI
语种	英语
WOS研究方向	Plant Sciences ; Evolutionary Biology
WOS类目	Plant Sciences ; Evolutionary Biology
WOS记录号	WOS:000249460600019
引用统计	被引频次：50[WOS]   [WOS记录]     [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/1256
专题	中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, NW Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining, Peoples R China 2.Lanzhou Univ, MOE Key Lab Arid & Grassland Ecol, Lanzhou 730000, Peoples R China 3.Inst Tibetan Plateau Res, Kunming, Peoples R China 4.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Duan, Y.-W.,Zhang, T.-F.,Liu, J.-Q.. Interannual fluctuations in floral longevity, pollinator visitation and pollination limitation of an alpine plant (Gentiana straminea Maxim., Gentianaceae) at two altitudes in the Qinghai-Tibetan Plateau[J]. PLANT SYSTEMATICS AND EVOLUTION,2007,267(1-4):255-265.
APA	Duan, Y.-W.,Zhang, T.-F.,&Liu, J.-Q..(2007).Interannual fluctuations in floral longevity, pollinator visitation and pollination limitation of an alpine plant (Gentiana straminea Maxim., Gentianaceae) at two altitudes in the Qinghai-Tibetan Plateau.PLANT SYSTEMATICS AND EVOLUTION,267(1-4),255-265.
MLA	Duan, Y.-W.,et al."Interannual fluctuations in floral longevity, pollinator visitation and pollination limitation of an alpine plant (Gentiana straminea Maxim., Gentianaceae) at two altitudes in the Qinghai-Tibetan Plateau".PLANT SYSTEMATICS AND EVOLUTION 267.1-4(2007):255-265.

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