Knowledge Management System of Northwest Institute of Plateau Biology, CAS
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 | |
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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