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首页> 外文学位 >Liana distribution and host relationships in some temperate versus tropical forest sites (North Carolina, Costa Rica).
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Liana distribution and host relationships in some temperate versus tropical forest sites (North Carolina, Costa Rica).

机译：在一些温带森林地区和热带森林地区（北卡罗莱纳州，哥斯达黎加）的藤本植物分布和寄主关系。

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Lianas (woody vines) are an important but often neglected component of many types of forest. This study was designed to document the species of lianas in Carolina mixed mesophytic forest (Rich Gap and Conley Creek), Carolina xeric white-oak dominated forest (Cliffside), and Costa Rican seasonally dry tropical forest (Palo Verde). Another aim of this study was to investigate the liana-host relationship in each of these forests. I identified and measured the diameter at breast height (dbh) of every tree within 20 x 20 m plots. I identified and measured the diameter of lianas at 10 cm above the ground, and I recorded the primary host tree that each liana was utilizing. No lianas were observed within plots at Clifftop Vista. Palo Verde had the highest species richness in terms of lianas (15 species) and trees (33 species), and the highest percentage of trees hosting lianas (55%), compared to 0% at Clifftop Vista, 37% at Rich Gap and 29% at Conley Creek. The number of lianas per tree was greatest at Palo Verde (mean of 1.68 lianas per tree) and lower at the two temperate mesic forest sites (0.49 lianas per tree at Rich Gap and 0.48 lianas per tree at Conley Creek). Host tree species was important in explaining liana distribution at Rich Gap and Conley Creek. Host-tree size was influential at Rich Gap, Conley Creek and Palo Verde. At Rich Gap, lianas were found in proportion to the host surface area available to climb (e.g., Vitis), whereas at Conley Creek and Palo Verde, lianas were restricted to particular sizes of hosts (e.g., Aristolochia at Conley Creek). This study suggests that lianas are restricted by host tree species and host size. Thus, it seems that each species of liana may utilize a particular suite of tree species and sizes as hosts.
机译：藤本植物（木本藤本植物）是许多类型森林的重要但经常被忽视的组成部分。这项研究旨在记录卡罗来纳州混合中生森林（Rich Gap和Conley Creek），卡罗来纳州干燥白橡为主的森林（Cliffside）和哥斯达黎加季节性干燥的热带森林（Palo Verde）中的藤本植物种类。这项研究的另一个目的是调查每种森林中的藤本植物与寄主的关系。我确定并测量了20 x 20 m地块内每棵树的胸高（dbh）处的直径。我确定并测量了距地面10 cm的藤本植物的直径，并记录了每个藤本植物正在利用的主要寄主树。在Clifftop Vista的地块内未观察到藤本植物。就藤本植物（15种）和树木（33种）而言，Palo Verde的物种丰富度最高，而容纳藤本植物的树木百分比最高（55％），相比之下，Clifftop Vista为0％，Rich Gap为37％和29 ％在Conley Creek。在Palo Verde，每棵树的藤本植物数量最多（平均每棵树1.68藤本植物），而在两个温带的中性森林站点中则更低（Rich Gap每棵树0.49藤本植物和Conley Creek每棵树0.48藤本植物）。寄主树种在解释Rich Gap和Conley Creek的藤本植物分布方面很重要。宿主树的大小对Rich Gap，Conley Creek和Palo Verde有影响。在Rich Gap，发现藤本植物与可攀登的寄主表面积成比例（例如Vitis），而在Conley Creek和Palo Verde，藤本植物仅限于特定大小的寄主（例如Conley Creek的马兜铃属）。这项研究表明藤本植物受寄主树种和寄主大小的限制。因此，似乎藤本植物的每个物种都可以利用特定的一组树种和大小作为寄主。

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