中国地理科学 ›› 2016, Vol. 26 ›› Issue (1): 68-77.doi: 10.1007/s11769-015-0747-0

• 论文 • 上一篇    下一篇

Influencing Factors of Seed Long-distance Dispersal on a Fragmented Forest Landscape on Changbai Mountains, China

ZHAO Fuqiang, QI Lin, FANG Lei, YANG Jian   

  1. State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, China
  • 收稿日期:2014-07-14 修回日期:2014-12-02 出版日期:2016-01-27 发布日期:2015-12-18
  • 通讯作者: YANG Jian. E-mail:yangjian@iae.ac.cn E-mail:yangjian@iae.ac.cn
  • 基金资助:

    Under the auspices of National Natural Science Foundation of China (No. 31300526), National Key Technologies R&D Program of China (No. 2012BAD22B04), Chinese Forest Ecosystem Research Network & GENE Award Funds on Ecological Paper

Influencing Factors of Seed Long-distance Dispersal on a Fragmented Forest Landscape on Changbai Mountains, China

ZHAO Fuqiang, QI Lin, FANG Lei, YANG Jian   

  1. State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, China
  • Received:2014-07-14 Revised:2014-12-02 Online:2016-01-27 Published:2015-12-18
  • Contact: YANG Jian. E-mail:yangjian@iae.ac.cn E-mail:yangjian@iae.ac.cn
  • Supported by:

    Under the auspices of National Natural Science Foundation of China (No. 31300526), National Key Technologies R&D Program of China (No. 2012BAD22B04), Chinese Forest Ecosystem Research Network & GENE Award Funds on Ecological Paper

摘要:

Seed long-distance dispersal (LDD) events are typically rare, but are important in the population processes that determine large-scale forest changes and the persistence of species in fragmented landscapes. However, previous studies focused on species dispersed via animal-mediated LDD, and ignored those dispersed by wind. The aim of this study was to assess the effects of canopy openness, edge, seed source, and patch tree density on the LDD of seeds by wind in forest. We collected birch seeds, a typical wind-dispersed species, throughout a larch plantation. We then assessed the relationship between birch LDD and each factor that may influence LDD of seeds by wind including distance to edge, canopy openness size, distance to mature forest, and the tree density of the larch plantation. We used univariate linear regression analysis to assess the influence of those factors on birch LDD, and partial correlations to calculate the contribution of each factor to LDD. The results showed that both canopy openness and edge had significant influences on birch LDD. Specifically, a negative relationship was observed between distance to edge and birch LDD, whereas there was a positive correlation between canopy openness size and LDD. In contrast, the distance to the mature forest was not correlated with birch LDD. Our results suggest that patch tree density could potently affect the probability of LDD by wind vectors, which provides novel and revealing insights regarding the effect of fragmentation on wind dynamics. The data also provide compelling evidence for the previously undocumented effect of habitat fragmentation on wind-dispersed organisms. As such, these observations will facilitate reasonable conservation planning, which requires a detailed understanding of the mechanisms by which patch properties hamper the delivery of seeds of wind-dispersed plants to fragmented areas.

关键词: seed long-distance dispersal (LDD), forest fragmentation, patch property, wind dispersal, Changbai Mountains

Abstract:

Seed long-distance dispersal (LDD) events are typically rare, but are important in the population processes that determine large-scale forest changes and the persistence of species in fragmented landscapes. However, previous studies focused on species dispersed via animal-mediated LDD, and ignored those dispersed by wind. The aim of this study was to assess the effects of canopy openness, edge, seed source, and patch tree density on the LDD of seeds by wind in forest. We collected birch seeds, a typical wind-dispersed species, throughout a larch plantation. We then assessed the relationship between birch LDD and each factor that may influence LDD of seeds by wind including distance to edge, canopy openness size, distance to mature forest, and the tree density of the larch plantation. We used univariate linear regression analysis to assess the influence of those factors on birch LDD, and partial correlations to calculate the contribution of each factor to LDD. The results showed that both canopy openness and edge had significant influences on birch LDD. Specifically, a negative relationship was observed between distance to edge and birch LDD, whereas there was a positive correlation between canopy openness size and LDD. In contrast, the distance to the mature forest was not correlated with birch LDD. Our results suggest that patch tree density could potently affect the probability of LDD by wind vectors, which provides novel and revealing insights regarding the effect of fragmentation on wind dynamics. The data also provide compelling evidence for the previously undocumented effect of habitat fragmentation on wind-dispersed organisms. As such, these observations will facilitate reasonable conservation planning, which requires a detailed understanding of the mechanisms by which patch properties hamper the delivery of seeds of wind-dispersed plants to fragmented areas.

Key words: seed long-distance dispersal (LDD), forest fragmentation, patch property, wind dispersal, Changbai Mountains