• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Biology Bulletin >Features of the Organization of Populations of a Rare Species Cephalaria uralensis (Murr.) Schrad. ex Roem. et Schult. (Dipsacaceae, Magnoliopsida) in the Trans-Volga and Cis-Urals Regions
【24h】

Features of the Organization of Populations of a Rare Species Cephalaria uralensis (Murr.) Schrad. ex Roem. et Schult. (Dipsacaceae, Magnoliopsida) in the Trans-Volga and Cis-Urals Regions

机译：稀有物种头孢菌（Murr.）Schrad组织组织人口群体组织的特征。 EX ROEM。埃尔舒勒。 （Dipsacaceae，magnoliopsida）在跨伏尔加和螺丝乌拉尔地区

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The results of the study of 23 natural cenopopulations of Cephalaria uralensis (Murr.) Schrad. ex Roem. et Schult., a rare subendemic species of the Eastern European steppe zone, in the Trans-Volga and Cis-Urals regions (Republic of Bashkortostan, Samara and Orenburg regions) are presented. The indices of the density, age structure, and demographic features of the population have been studied and compared. The total density varies from 2.2 to 10.3 ind./m(2). The average ontogenetic spectrum of C. uralensis is centered. According to the delta-omega classification, C. uralensis populations are distributed from young to aging. In most populations of that species, restitution and aging indices are very low. The studies suggest that the populations of C. uralensis in the South Urals, Trans-Volga, and Cis-Urals regions are in a satisfactory state. A threat to the species is the disturbance of its habitats due to excessive cattle pasture.
机译：施拉（MURR.）Schrad 23例Cephalaria Uralensis的23种天然爬行性研究结果。 EX ROEM。提出了跨国公司的稀有欧洲草原区的稀有性患者，在Trans-Volga和Cis-Urals地区（Bashkortostan共和国，萨马拉和俄勒冈州和奥伦堡地区）。研究了和比较了人口密度，年龄结构和人口统计特征的指标。总密度从2.2到10.3 Ind./m（2）变化。将C.Utalensis的平均植入谱中心为中心。根据Delta-Omega分类，C. Uralensis人群分配到老龄化。在该物种的大多数人群中，恢复原状和老化指数非常低。该研究表明，南乌拉尔，跨伏尔加和联合乌拉尔地区的C. Uralensis群体处于令人满意的状态。对物种的威胁是由于过度牛牧场的栖息地的障碍。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号