昆嵛山植物性别系统及其生态关联性

植物性别系统影响生态系统组成及种群进化,同时受多种生态因子影响.为分析昆嵛山种子植物性别系统分布及其生态关联性,调查了昆嵛山维管植物835种,详细观察、记录花部特征、果实类型、生活型、传粉特征.运用卡方检验分析上述特征与植物性别系统之间的关联性,对比昆嵛山植物与其他植物群落的性别系统组成,探讨影响植物性别系统组成的因素及其繁殖策略.结果表明:昆嵛山植物性别系统中79.2%为雌雄同体、11.3%为雌雄同株、9.5%为雌雄异株,雌雄同体植物比例明显高于北美洲温带森林,该组成与植物种系发生有关;生活型、花部特征、传粉方式、果实类型等特征与性别系统显著相关.

Sexual Systems and Ecological Links of Wood Plants in Kunyu Mountains

Plant sexual system related with ecosystem composition and population evolution is affected by multiple ecological factors. In order to analyze the correlation between the sexual system distribution and the ecology of the plants in Kunyu Mountains,835 species of vascular plants at different altitudes in Kunyu Mountains were investigated,and their floral characteristics,fruit type,life-form and pollination characteristics were observed and recorded in detail. Correlations between the above characteristics and the plant sexual system were analyzed by chi-square test. The sexual system composition of the plants in Kunyu Mountains was compared with other regional plant communities. Factors affecting the sexual system composition and reproduction strategies of the plants were also investigated. The results showed the percent of hermaphrodite plants, monoecious plants and dioecious plants in Kunyu Mountains was 79. 2%, 11. 3% and 9. 5% respectively, and the proportion of hermaphrodites was higher than that of temperate forests in North America, this phenomenon was related to phylogeny. The floral characteristics,pollination patterns and fruit types were significantly correlated to the sexual system.