...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Biology Bulletin Reviews >The Effect of Density Compensation in Species-Poor Plant Communities of Mainland Areas (on the Example of the Western Caucasus)
【24h】

The Effect of Density Compensation in Species-Poor Plant Communities of Mainland Areas (on the Example of the Western Caucasus)

机译：密度补偿对内地物种稀缺植物群落的影响（以西部高加索地区为例）

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

There is much evidence of the effect of density compensation in the island biota, while the data on its distribution pattern and reasons of appearance in the inland communities are still insufficient and contradictory. We have evaluated the intensityof the effect of density compensation in species-poor plant communities of the natural (seminatural), anthropogenic, and fragmented habitats of the Western Caucasus as one of the inland regions. For this purpose, we have compared the species diversity, relative density (biomass) of predominating species, and mean occurrence of accompanying species in closed communities, as well as the species diversity and mean occurrence of species for open communities. The data show that the domination level and meanoccurrence of species in the species-poor phytocenoses may differ and may be related to species organization and the regime of local disturbances. Among the studied communities, the rise in the mean species occurrence, contrary to the species diversity,was only revealed for segetal cenoses and plant groups of meander bars, which are mainly formed by species with R-strategy. We suppose that the effect of density compensation in closed communities mainly results from a drop in the density of predominating species as a result of local disturbances or other reasons, in combination with the limited size of their species pool.
机译：有许多证据表明，密度补偿对岛屿生物群有影响，而关于其分布方式和在内陆社区中出现的原因的数据仍然不足且相互矛盾。我们已经评估了密度补偿对西高加索地区（内陆地区之一）自然（半自然），人为和零散的栖息地物种贫乏的植物群落的影响强度。为此，我们比较了物种多样性，主要物种的相对密度（生物量）和封闭社区中伴随物种的平均发生率，以及开放社区中物种多样性和物种的平均发生率。数据表明，在物种贫乏的植物群落中，物种的支配水平和平均发生率可能不同，并且可能与物种的组织和局部干扰的制度有关。在所研究的群落中，与物种多样性相反的平均物种发生率的上升仅在主要由具有R策略的物种形成的水系普查和曲折植物群中才显示出来。我们认为，封闭社区的密度补偿效应主要是由于当地干扰或其他原因导致优势物种密度下降，再加上物种库的规模有限。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
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