沙坡头自然保护区猫头刺种群生命表与生存分析
Life Table and Survival Analysis of Oxytropis aciphylla in Shapotou Nature Reserve
曹蕾 1廖贺贺 1王旭 1裘骏一1
作者信息
- 1. 兰州大学资源环境学院,甘肃兰州730000
- 折叠
摘要
[目的]探讨沙坡头自然保护区猫头刺种群数量动态变化规律.[方法]以沙坡头自然保护区的猫头刺种群为研究对象,以调查数据为基础编制静态生命表和生存曲线,并借助生存分析函数分析沙坡头自然保护区猫头刺种群动态特征,阐明了其种群数量特征.[结果]猫头刺种群的存活曲线属于Deevey-Ⅰ型,幼年个体数量最多,到达其生理年龄后,个体大量死亡,猫头刺种群龄级结构为金字塔型;消失率与死亡率曲线变化一致,前期数值小但缓慢上升,后期迅猛增长,达到最大值;4个猫头刺种群生存分析函数结果表明猫头刺种群整体呈现出前期稳定、中期渐减、后期衰退的特征.[结论]沙坡头自然保护区目前的生态环境可维持幼龄猫头刺种群的生长.
Abstract
[Objective] The aim was to discuss population quantity dynamic change of Oxytropis aciphylla in Shapotou Nature Reserve.[Method] With Oxytropis aciphylla population in Shapotou Nature Reserve as research object,based on investigation data,the static life table and survival curve was compiled.By referring to survival analysis function,the dynamic characteristics of Oxytropis aciphylla population in Shapotou Nature Reserve were analyzed,the population quantity characteristics were elaborated.[Result] The results showed that the survival rate curve of Oxytropis aciphylla population appeared to be Deevey-Ⅰ.Young individuals were the most population density.But when Oxytropis aciphylla reached its physiological age,a large number of individuals died,the size structure of Oxytropis aciphylla population indicated pyramid pattern with the growing population characters.Disappearance rate curve and mortality rate curve were consistent.In the preliminary numerical value was small,little changed and rose slowly.However in the later period it grew rapidly and reached its peak.The viability analysis function of Oxytropis aciphylla population showed that Oxytropis aciphylla population overall present the characteristic of stabilization in the early age,degression in medium-term and recession in old age period.[Conclusion] The current eco-environment of Shapotou Nature Reserve is appropriate for growth of young Oxytropis aciphylla.
关键词
沙坡头国家级自然保护区/种群静态生命表/存活曲线/生存分析函数/猫头刺Key words
Shapotou Nature Reserve/Population static life table/Survival curve/Survival analysis function/Oxytropis aciphylla引用本文复制引用
基金项目
国家环保公益性行业科研专项(201209034)
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据