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海拔变化对椭圆叶花锚繁殖策略的影响

发表时间:2016-05-15  浏览量:1603  下载量:504
全部作者: 王沙沙,张仁懿,郑 凯,封 烁,袁建立
作者单位: 兰州大学生命科学学院草地与农业生态系统国家重点实验室
摘 要: 椭圆叶花锚广泛分布于青藏高原东部地区。通过对比分析海拔梯度与椭圆叶花锚的个体大小、繁殖特征,探讨不同海拔下它的资源分配与繁殖策略。结果显示:1)随着海拔升高、个体大小减小,繁殖分配和繁殖输出增大;当去除个体大小的影响时,海拔与繁殖分配、繁殖输出之间仍呈显著正相关关系。2)繁殖分配随植株减小而增大,繁殖输出与个体大小之间无显著相关;当去除海拔的影响后,繁殖分配与个体大小显著相关,繁殖输出与个体大小无显著相关性。3)随着海拔升高,种群内个体大小分布越来越集中。研究表明,随着海拔升高,一年生植物的个体大小呈减小趋势,植物通过降低生长、增加繁殖的能量权衡来适应不同的海拔生境。
关 键 词: 生态学;海拔;繁殖分配;繁殖输出;个体大小;相关性
Title: Influence of altitude on reproductive strategies of Halenia elliptica
Author: WANG Shasha, ZHANG Renyi, ZHENG Kai, FENG Shuo, YUAN Jianli
Organization: State Key Laboratory of Grassland and Agro-Ecosystems, School of Life Sciences, Lanzhou University
Abstract: Halenia elliptica is a common species in the eastern Tibetan plateau. We sampled H. elliptica along with elevation, and aimed to study its individual size and reproductive strategies in various altitude gradients and examined how environmental factors contribute to species evolution. Results showed: 1) Individual size decreased, while reproductive allocation and reproductive export increased along with elevation. When the effect of individual size was controlled statistically, significant positive correlation was found between elevation and reproductive allocation, as well as elevation and reproductive export. 2) Reproductive allocation decreased with individual size increasing, but there was no significant relationship between reproductive export and individual size. When the effect of elevation was controlled statistically, reproductive allocation was negatively related to individual size, whereas no significant relationship between reproductive export and individual size was found. 3) Individual size within the population was more centrally distributed as elevation increasing. As an environmental factor, altitude has a great influence on individual size, reproductive allocation and reproductive export.
Key words: ecology; altitude; reproductive allocation; reproductive export; individual size; correlation
发表期数: 2016年5月第9期
引用格式: 王沙沙,张仁懿,郑 凯,等. 海拔变化对椭圆叶花锚繁殖策略的影响[J]. 中国科技论文在线精品论文,2016,9(9):901-908.
 
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