• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Biology and fertility of soils: Cooperating Journal of the International Society of Soil Science >Exotic earthworms maintain soil biodiversity by altering bottom-up effects of plants on the composition of soil microbial groups and nematode communities
【24h】

Exotic earthworms maintain soil biodiversity by altering bottom-up effects of plants on the composition of soil microbial groups and nematode communities

机译：通过改变植物对土壤微生物组和线虫社区的组成来改变植物的自下而上影响来保持土壤生物多样性

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

Bottom-up effects of plants on soil communities can be modified by the activity of exotic earthworms, by altering resource availability for soil food webs through feeding, burrowing, and casting activities. The present study explored effects of plants (planting of shrubs) on soil micro-food webs (composition of soil microbial and nematode communities), and whether these effects were altered by the activity of exotic earthworms (exotic earthworms addition). Planted shrubs resulted in a non-significant increase of bacterial biomass and significantly increased the abundance of different nematode trophic groups and total nematode biomass, indicating that planted shrubs had significant bottom-up effects on soil bacteria and nematodes. Planted shrubs decreased nematode diversity, evenness, and richness, but increased nematode dominance in the plots where the abundance of exotic earthworms was not amended. By contrast, these effects of shrub presence on soil biodiversity were not found in the plots that received exotic earthworms. In addition, planted shrubs increased the total energy flux to the nematode community. By contrast, the elevated activity of exotic earthworms mitigated the increase in total energy flux to nematodes in the presence of shrubs, and increased the ratio of fungal to bacterial PLFAs. Both of these changes indicate reduced energy flux in the plots with added exotic earthworms. Nematode diversity decreased, while nematode dominance increased with increasing total energy flux to nematodes, probably because few species benefited from high energy flux. Our study indicates that exotic earthworms can maintain soil biodiversity by reducing the energy flux through soil food webs.
机译：通过喂养，挖洞和铸造活动改变土壤食品纤维网的资源可用性，通过喂养和铸造活动来改变植物植物对土壤社区的自下而上效应。本研究探讨了植物（种植灌木）对土壤微餐纤维网（土壤微生物和线虫社区的组成）的影响，以及这些效应是否被异国情调蚯蚓的活性改变（异国情调的蚯蚓加成）。种植的灌木导致了细菌生物量的非显着增加，显着增加了不同线虫营养群和总线虫生物量的丰度，表明种植灌木对土壤细菌和线虫具有显着的自下而上的影响。种植灌木减少了线虫多样性，均匀度和丰富性，但在不修改外来蚯蚓的丰富的地块中增加了线虫优势。相比之下，在接受异国情调的蚯蚓的地块中没有发现灌木存在对土壤生物多样性的影响。此外，种植的灌木将总能量通量增加到线虫群落。相比之下，异国情调蚯蚓的升高活性减轻了在灌木存在下对线虫的总能量通量的增加，并增加了真菌与细菌PLFA的比率。这两种变化都表明了添加了外来蚯蚓的地块中的能量通量。线虫多样性下降，而线虫优势随着线虫总能量通量的增加而增加，可能是因为很少有利于高能通量的物种。我们的研究表明，异国情调的蚯蚓可以通过降低通过土壤食品网来保持土壤生物多样性。

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