首页关于本刊影响因子及获奖投稿须知订阅及广告专辑与专题学术会议绿色发表通道优秀论文 
说明:
此论文已被《生态学报》录用,现已优先出版,可查看文章PDF版本!
赵阳,齐瑞,焦健,陈学龙,曹家豪,冯宜明,杨萌萌.尕海-则岔地区紫果云杉种群结构与动态特征.生态学报,2018,(20).http://dx.doi.org/10.5846/stxb201710201892  
尕海-则岔地区紫果云杉种群结构与动态特征
The population structure and dynamic characteristics of Picea purpurea at the Ga hai-ze cha area
投稿时间:2017-10-20  修订日期:2018-05-02
DOI: 10.5846/stxb201710201892
关键词尕海-则岔  紫果云杉  种群结构  生命表  动态特征
Key WordsGahai-zecha  Picea purpurea  population structure  life table  dynamic characteristics
基金项目基金项目:甘肃省科技支撑计划项目(144FKCK072);甘肃省林业科技项目(2015kj051);(2016kj058;2016kj060);甘肃省陇原青年创新人才计划
作者单位E-mail
赵阳 甘肃农业大学林学院 573102514@qq.com 
齐瑞 甘肃省白龙江林业管理局林业科学研究所 甘肃 兰州  
焦健 甘肃农业大学林学院  
陈学龙 甘肃省白龙江林业管理局林业科学研究所  
曹家豪 甘肃省白龙江林业管理局林业科学研究所 甘肃 兰州  
冯宜明 甘肃省白龙江林业管理局林业科学研究所 甘肃 兰州  
杨萌萌 甘肃省白龙江林业管理局林业科学研究所 甘肃 兰州  
摘要点击次数 38
全文下载次数 8
摘要:
紫果云杉(Picea purpurea)为我国特有树种,为了解其种群生存现状及动态特征,以尕海-则岔自然保护区则岔沟的紫果云杉天然纯林为研究对象,通过样地调查和数据统计,绘制了种群结构图,编制了静态生命表,分析了存活曲线,运用生存分析理论与数量化分析法研究种群结构与动态,并运用时间序列模型对种群数量动态进行预测,以揭示本区域紫果云杉的种群结构与动态特征。结果表明,紫果云杉种群龄级结构、高度结构和冠幅结构总体均呈倒“J”型。种群自然更新能力强,幼苗、幼树储量丰富,前期有较高的死亡率,种群存活曲符合Deevey-Ⅲ型。生存分析也说明紫果云杉种群具有前期锐减,中、后期稳定的特点。竞争和自疏作用造成的幼苗、幼树存活率偏低是影响紫果云杉种群自然更新和结构的关键因素。种群动态指数Vpi>0,表明种群属于增长型,V′pi趋近于0,表明该种群趋近于稳定型。时间序列预测分析表明,在未来2、4、6、8个龄级后,紫果云杉个体数均有所增加,种群呈一定的增长趋势。说明该保护区的成立使本区域紫果云杉种群得到了相对完整的保存,该种群适应当前的生存环境,能实现自然更新且仍有一定的增长潜力。紫果云杉种群更新主要受制于建成限制,幼苗、幼树存活率过低,可采取适当的人为干扰措施来促进种群更新与增长,而保护幼苗生存环境并提高幼苗质量和存活率才是种群更新和发展的关键。
Abstract:
Picea purpurea is a unique tree species in China. To determine the population survival status and dynamic characteristics, natural P. purpurea forests at Zecha Valley in Gahai-Zecha nature reserve were used as the study organisms. Based on field surveys and data analysis, a population structure diagram, static life table, and survival curve were drawn. Using the method of the analysis?in?amount and survival analysis, population survival status was determined. The population dynamics were predicted by time-sequence model, this study aimed at revealing the population structure and dynamic characteristics of P. purpurea in this area. The results showed that the P. purpurea population age structure, height structure, and crown structure exhibited an inverted ‘J’ type. The P. purpurea population had a strong natural rebirth ability, the seedlings and saplings were rich in reserves, juvenile stage mortality was high, and the survival curve of the population conformed to the Deevey-Ⅲ type. The survival analysis also showed that the population of P. purpurea was characterized by a sharp decline in the early stage, and stability during the middle and late stages. The low survival rate of seedlings and young trees caused by competition and self-thinning was the key factor, which affected the natural regeneration and population structure of P. purpurea. The population dynamic index Vpi > 0 indicated that the population belonged to the growth type, and V"pi was close to 0 indicating that the population tended to be stable. Time series predictive analysis showed that the number of Picea purpurea individuals have increased after the 2, 4, 6 and 8 age classes, the population showed a?degree?growth trend. It was indicated that the establishment of the protected area had relatively completely preserved the P. purpurea population in this area. The population had adapted to the current living environment, could achieve natural regeneration, and had certain growth potential. The population regeneration of P. purpurea was subjected to establishment limitation. The survival rates of young seedlings and young trees were too low. Appropriate anthropogenic interference measures could be adopted to promote population renewal and growth. The keys to population regeneration and development were to protect the survival environment of the seedlings and improve their quality and survival rate.
HTML 查看全文   查看/发表评论  下载PDF阅读器

您是本站第 72171690 位访问者

Copyright © 2005-2019   京ICP备06018880号
地址:北京海淀区双清路18号
  邮编:100085    电话:010-62941099
  E-mail : shengtaixuebao@rcees.ac.cn
本系统由北京勤云科技发展有限公司提供技术支持