论文部分内容阅读
种群生活史特征和空间分布格局对于分析种群演替动态规律、判定种群分布规律和预测种群演化过程及变化趋势均具有重要的理论和现实意义。本文从静态生命表、年龄结构、存活曲线三个方面分析了东灵山地区辽东栎种群的生活史特征。结果表明:物种生物学因素是影响辽东栎种群生存力最主要因素,辽东栎种群静态生命表中生命期望值逐渐降低反映出种群生存力下降的趋势。空间分布格局分析表明辽东栎种群各个径级的个体都属于聚集分布。辽东栎实生苗和萌生苗共存是辽东栎种群适应环境压力和与环境协同进化的结果,表明自然状态下辽东栎种群具有较高的稳定性。由于辽东栎种群的这种较强的稳定性和适应能力,随着辽东栎种群发育整个群落将趋于进展演替,最终形成稳定和充分利用环境资源的顶极群落结构。
Population life history characteristics and spatial distribution pattern have important theoretical and practical significance for the analysis of population dynamics, population distribution and prediction of population evolution and trends. This paper analyzes the life history characteristics of Quercus liaotungensis population in Dongling Mountain from three aspects: static life table, age structure and survival curve. The results showed that the species biological factors were the most important factors that affected the population viability of Quercus liaotungensis. The gradual decrease of life expectancy in the Quercus liaotungensis static life table reflected the tendency of population viability decreasing. Spatial distribution pattern analysis showed that individuals of each diameter class of Quercus liaotungensis belong to aggregative distribution. The coexistence of seedling and sprouting seed of Quercus liaotungensis is the result of co-evolution of Quercus liaotungensis population adapting to environmental pressure and environment, indicating that Quercus liaotungensis Quercus population has high stability under natural conditions. Due to the strong stability and adaptability of Quercus liaotungensis, the whole community will tend to progress with Quercus liaotungensis population eventually forming a climax community structure that is stable and makes full use of environmental resources.