[Fitness analysis of seed- and vegetative reproduction of clonal tree Symplocos laurina].
There are two ways in Symplocos laurina propagation, clonal and sexual reproduction. The study showed that under different habitat conditions, Symplocos laurina could adopt different ways to propagate and occupy space. In conditions with abundant water and nutrient resources, such as in evergreen broad-leaved forests or bamboo forests, the survival rate and space-occupying ability of both ramets and sexual seedlings were relatively high, with clonal ramets took advantage in terms of number and space, suggesting that clonal propagation was the dominant way in such environments. Oppositely, in habitats lack of sufficient nutrition, the survival rate and space-occupying ability of seedlings were low, and grown-up plantlets would preempt in number and space occupation. Bottleneck in sexual propagation appeared in the stage from seed to seedling, while clonal propagation appeared during the period from seedling to ramet. The way of Symplocos laurina invasion was to settle a plantlet, and then occupied the space rapidly by clonal growth, with clonal seedlings dominated in initial stage and lost the advantage after 15 ages.
Zhang
Yunchun
Y
Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China. yunchunzhang@163.com
Du
Xiaojun
X
Zhang
Qiaoying
Q
Gao
Xianming
X
Su
Zhixian
Z
D000220:Adaptation, Biological; D017753:Ecosystem; D004777:Environment; D011156:Population Density; D012098:Reproduction / Q000502:physiology*; D012100:Reproduction, Asexual / Q000502:physiology*; D036226:Seedlings / Q000502:physiology; D014197:Trees / Q000502:physiology*