摘要
运用静态生命表、生殖力表和Leslie矩阵模型,研究澜沧江下游黄竹的种群数量动态。结果表明,种群存活曲线表现为Deevey-Ⅰ型。种群表现出幼龄个体数量较多,但死亡率较高;中龄级个体数量虽少,但存活质量较高,说明幼龄阶段曾受到较大的人为、动物的干扰。种群的净增长率(R0>1)、内禀增长率(r m>0)和周限增长率(λ>1)的数值表明,黄竹种群上升,能完成自我更新,表现为发展种群。Leslie矩阵模型分析表明,在未来25年中种群各龄级的个体数及种群总数均表现出持续增长的趋势。由于环境有限,生物本身也是有限的,加之外界人为采挖和动物的取食,种群将会在达到最大环境容纳量后趋于平稳状态。
By accessing the Static life-table, fecundity schedule, and Leslie matrix models, the popula- tion dynamics of dendeocalamus membranceus in lower basin of Lancang River are studied. The results show that the population survival curve is identical to the Deevey-I model. The population exhibits a grea- ter number of young individuals with a high mortality rate and a moderate number of mid-aged individual with a high survival rate, thus indicating that the population has experienced considerable disturbances from humans and wild animals. The net reproductive rate （R0 〉 1 ） , the intrinsic rate of increase （rm 〉 0） and the finite rate of increase of the population （λ 〉 1 ） reveals that the population is in a growing process, and is able to complete the regeneration process. Leslie matrix model analysis demonstrates that there will be a constant increase in the over-all population and in the number of individuals in each age class for the next 25 year. However, due to limitations of the environment, capabilities of the individual, variations in its environmental exposure, and human collecting and wild animals feeding, the population of the dendeocalamus membranceus in lower basin of Lancang River will return to equilibrium after the population reaches the maximum capacity of the environment.
出处
《林业调查规划》
2013年第4期33-38,共6页
Forest Inventory and Planning
关键词
黄竹
种群数量动态
Leslie矩阵模型
澜沧江下游
Dendeocalamus membranceus
population dynamics
Leslie matrix model
lower basin ofLancang River
