Loss of preferred habitat and pollen limitation threatens reproduction in a rare mountain Paeonia delavayi

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2016 > Vol13 No.12

	Loss of preferred habitat and pollen limitation threatens reproduction in a rare mountain Paeonia delavayi
	LI Wei; PAN Wen-wen; TAN Rui; WANG Juan
刊名	Journal of Mountain Science
	2016-12
卷号	13 期号:12 页码:2147-2154
关键词	Paeonia delavayi Peony Alpine ecosystems Habitats Breeding system Pollen limitation
ISSN号	1672-6316
通讯作者	WANG Juan
英文摘要	Paeonia delavayiis a wild tree peony species endemic to high-altitude regions in southwestern China. Recent agricultural land expansion, however, not only causes its dwindling population size, but also poses a severe threat to its long-term persistence. Since our knowledge of the reproductive biology of P. delavayi is very limited, and some management misconceptions have further exacerbated the already worrisome situation, the aim of the present study is to provide some scientific evidence regarding habitat preference and breeding system of P. delavayi, and to help correct some management misconceptions. Specifically, morphological traits of P. delavayi populations growing in two different habitats (i.e., the open area versus forest understory), including basal stem diameter, plant height and flower numbers per plant, were measured and compared with each other. A range of floral manipulation experiments was further conducted to study the extent of self-compatibility and pollen limitation. The results showed that P. delavayi preferred the open habitat over forest understory as it generally grew bigger with thicker stems, and produced a higher number of flowers in the former habitat. Therefore, the open habitat should receive immediate priority for conservation action instead of being converted to agricultural land; also, P. delavayi is pollen limited, as evidenced by the fact that experimental flowers receiving supplemental non-self pollen generally displayed elevated seed production than flowers subjected to other treatments (e.g., non-supplemental self pollen, non-supplemental non-self pollen and supplemental self pollen), which is consistent with reported observations that alpine plants are more likely to be pollen-limited than lowland plants. We suggest that human intervention might be necessary to guarantee the long-term persistence of P. delavayi as harsh alpine environment, intense competition for pollinators and different anthropogenic perturbations co-limit its reproductive success.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/17827]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2016_Vol13 No.12
推荐引用方式 GB/T 7714	LI Wei,PAN Wen-wen,TAN Rui,et al. Loss of preferred habitat and pollen limitation threatens reproduction in a rare mountain Paeonia delavayi[J]. Journal of Mountain Science,2016,13(12):2147-2154.
APA	LI Wei,PAN Wen-wen,TAN Rui,&WANG Juan.(2016).Loss of preferred habitat and pollen limitation threatens reproduction in a rare mountain Paeonia delavayi.Journal of Mountain Science,13(12),2147-2154.
MLA	LI Wei,et al."Loss of preferred habitat and pollen limitation threatens reproduction in a rare mountain Paeonia delavayi".Journal of Mountain Science 13.12(2016):2147-2154.