• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Biology Bulletin >Effects of Intra- and Interspecific Interactions in Earthworm Assemblages: A Comparative Study
【24h】

Effects of Intra- and Interspecific Interactions in Earthworm Assemblages: A Comparative Study

机译：Earth内部和种间相互作用的影响：比较研究。

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

Among the factors modifying the structure of associations and activity of earthworms, the influence of intra- and interspecific interactions has been studied insufficiently. In field experiments the relative importance of these interactions has been compared in lumbricid species that are trophic competitors: in the soil detritophages Allolobophora chlorotica and Aporrectodea caliginosa and in the leaf litter consumers Lumbricusrubellus and L. terrestris. For each species the relative significance of the intra- and interspecific interactions were evaluated by comparison of the state of lumbricid individuals in conditions of low (control) and high population densities in one- or two-species populations. The increase in population density (due to either conspecifics or species-competitor) usually negatively affected the important parameters of the current earthworm generation (growth, mortality, and fecundity), and also of the subsequent generation (numbers and size of the cocoons produced). For three species (except for L. terrestris), trends were revealed indicating the greater strength of intraspecific than interspecific interactions. The species reactions were determined by different factors: by the trophic competition for the litter-dwelling L. rubellus, whereas for the soil dwellers Al. chlorotica and A. caliginosa (in conditions of a surplus of food resources) they were presumably determined by competition for the space.
机译：在改变modifying的关联结构和活性的因素中，对种内和种间相互作用的影响研究不足。在田间试验中，已经比较了在营养竞争者的species类物种中这些相互作用的相对重要性：在土壤碎屑中的绿变色Allolobophora chlorotica和Aporrectodea caliginosa以及在凋落物的消费者Lumbricusrubellus和L. terrestris中。对于每种物种，通过比较一种群或二种群中低（对照）和高种群密度条件下类个体的状态，评估了种内和种间相互作用的相对重要性。种群密度的增加（由于物种或物种竞争者的影响）通常会对当前affected的重要参数（生长，死亡率和繁殖力）以及后代的重要参数（所产茧的数量和大小）产生负面影响。对于三种物种（除藜（L. terrestris）），趋势被揭示，表明种内相互作用的强度高于种间相互作用。物种反应是由不同的因素决定的：通过栖息在土壤中的L. rubellus的营养竞争，而在土壤中的Al。绿藻和A. caliginosa（在食物资源过剩的情况下）大概是由对空间的竞争决定的。

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