IMHE OpenIR  > 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
Corresponding AuthorWANG Juan
Source PublicationJournal of Mountain Science
AbstractPaeonia 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.
KeywordPaeonia Delavayi Peony Alpine Ecosystems Habitats Breeding System Pollen Limitation
Indexed BySCI
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Document Type期刊论文
CollectionJournal of Mountain Science_Journal of Mountain Science-2016_Vol13 No.12
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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.
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