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首页> 外文期刊>Ecological research >Individual resource allocation to vegetative growth and reproduction in subgenus Cyclobalanopsis (Quercus, Fagaceae) trees
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Individual resource allocation to vegetative growth and reproduction in subgenus Cyclobalanopsis (Quercus, Fagaceae) trees

机译：个体资源分配对青冈亚科（栎属，菊科）树的营养生长和繁殖

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摘要

The resource allocation for vegetative growth and female reproduction in three tree species of subgenus Cyclobalanopsis (Quercus, Fagaceae), i.e., Q. salici-na, Q. sessilifolia, and Q. acuta, were examined on a per-individual basis in two consecutive reproductive seasons, in order to test whether these trees fit the predictions of the masting hypotheses about resource matching versus resource switching. Since the three Quercus species have a biennial fruiting habit, it takes 3 years for the observation of two reproductive events. Female flower and acorn production per tree were investigated by using a seed-trap method and a numerical analysis of seed dispersal. The net production of each individual was estimated as the sum of the annual increase in the dry mass of vegetative organs and reproductive investment per tree. In the data analyses, the three species were pooled, since all 12 sample trees of the subgenus apparently showed masting in the same year, with no exceptions. Female flower and acorn production per individual tree changed considerably between years. The net production per tree increased with tree size, but did not differ between years. Therefore, the reproductive allocation (proportion of a plant's annual assimilated resources which are used for reproduction) differed dramatically between years. On the other hand, within a year, the reproductive allocation increased with increasing net production per tree. These results suggest that the switching of resource allocation between years within an individual are occurring in subgenus Cyclobalanopsis species, and the intensity of the switching increases with increasing tree size.
机译：在每个个体的基础上，连续两个研究了青冈亚种（Quercus，Fagaceae）的三个树种（Q. salici-na，Q。sessilifolia和Q. acuta）营养生长和雌性繁殖的资源分配为了检验这些树是否适合关于资源匹配与资源转换的桅杆假说的预测。由于三种栎属植物都有两年一次的结实习性，因此观察两个生殖事件需要3年的时间。通过使用种子诱集方法和种子扩散的数值分析研究了每棵树的雌花和橡子产量。每个人的净产量估计为每棵树的营养器官干重和生殖投资的年增长之和。在数据分析中，将这三个树种合并在一起，因为该亚属的所有12个样本树显然都在同一年显示出桅杆，没有例外。每棵树上的雌花和橡子产量在几年之间发生了很大变化。每棵树的净产量随树的大小而增加，但多年之间没有差异。因此，不同年份之间的生殖分配（用于繁殖的植物年同化资源的比例）差异很大。另一方面，一年之内，随着每棵树的净产量增加，生殖分配增加。这些结果表明，个体中不同年份之间资源分配的切换发生在青冈亚种中，并且切换的强度随着树木大小的增加而增加。

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