Biomass allocation between extension- and leaf display-oriented shoots in relation to habitat differentiation among five deciduous liana species in a Japanese cool-temperate forest
Biomass allocation between extension- and leaf display-oriented shoots in relation to habitat differentiation among five deciduous liana species in a Japanese cool-temperate forest
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DOI：
10.1007/s11258-010-9783-0
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发表时间：
2010-11-01
期刊：
影响因子：
1.7
通讯作者：
Tateno, Masaki
中科院分区：
文献类型：
--
作者：
Ichihashi, Ryuji;Nagashima, Hisae;Tateno, Masaki
藤本植物有不同的栖息地偏好。尽管与资源获取相关的形态特征可能因栖息地偏好而异，但很少有研究调查藤本植物的这种关联。在以前关于温带藤本植物的工作中，我们观察到(1)自由的多叶枝条和(2)附着在寄主植物上的攀援枝条；我们研究了五种藤本植物的生境偏好和枝条生产模式之间的关系。在这五种植物中，有两种在森林边缘较常见(森林边缘种)，两种在森林内较常见(森林内部种)。幼树(高3~8m)当年生枝条所占比例，林缘树种(45~60%)大于林内树种(6~30%)。因此，林内树种当年枝总质量比较大。这与更大的比叶面积相结合，使林内树种的单位枝条质量的叶面积是林缘树种的两倍。林缘树种的个体攀援枝较长，单位树干质量的长度小于林内藤本植物。因此，林缘树种和林内树种之间的延伸效率(以单位当年枝条质量的攀援茎长度之和衡量)相似。综上所述，藤本植物的枝条生产模式与物种的生境偏好有关。当前的潜在生产力(树叶)和寻找寄主和/或光照良好的环境(攀援茎)的能力之间的权衡可能会支持这种关系。
Liana species have a variety of habitat preferences. Although morphological traits connected to resource acquisition may vary by habitat preference, few studies have investigated such associations in lianas. In previous work on temperate lianas, we observed (1) free standing leafy shoots and (2) climbing shoots that clung to host plants; we examined relationships between habitat preference and shoot production patterns in five liana species. Among the five species, two were more frequent at the forest edges (forest-edge species), and two were more common within the forests (forest-interior species). The proportion of climbing shoots in current-year shoot mass of young plants (3-8 m in height) was greater in the forest-edge species (45-60%) than in the forest-interior species (6-30%). In consequence, there was a greater leaf mass ratio in the total current-year shoots of forest-interior species. This, combined with a greater specific leaf area, endows forest-interior species with a leaf area per unit shoot mass double that of forest-edge species. Forest-edge species had longer individual climbing shoots whose length per unit stem mass was smaller than in forest-interior lianas. Extension efficiency, measured as the sum of the climbing stem length per unit current-year shoot mass, was thus similar between forest-edge and interior species. In conclusion, liana shoot production patterns were related to species habitat preferences. A trade-off between current potential productivity (leaves) and the ability to search for hosts and/or well-lit environments (climbing stems) may underpin these relationships.