...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Oecologia >Mechanisms driving diversity-productivity relationships differ between exotic and native communities and are affected by gastropod herbivory
【24h】

Mechanisms driving diversity-productivity relationships differ between exotic and native communities and are affected by gastropod herbivory

机译：外来社区和本土社区之间驱动多样性与生产力关系的机制不同，并受腹足类食草动物的影响

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

Biodiversity experiments have shown that productivity usually increases with plant species richness. However, most of those studies disregarded the importance of trophic interactions to the diversity-productivity relationship, and focused on the loss of native species while ignoring invasions by exotic species. Yet, as functional complementarity and the impact of plant antagonists are likely to differ between native and exotic communities, the diversity-productivity relationship may change when native communities are invaded by exotic species. We conducted a mesocosm experiment to test how diversity effects, evenness, and productivity differed between exotic and native assemblages of grassland plants, and how these communities were influenced by slug herbivory. In line with other experiments, we found higher productivity in exotic than in native communities. However, different mechanisms (complementarity vs. selection effect) contributed to the positive diversity-productivity relationships in exotic vs. native communities. Against expectations, native communities showed much lower evenness and a greater selection effect, suggesting that competitive dominance among native species may be even stronger than among exotic species. Slug herbivory decreased productivity independently of species origin and species diversity. However, exotic communities showed a threefold higher complementarity effect than native communities in the absence of slugs, which was mainly driven by differences in the responses of native and exotic legumes and nonleguminous herbs. Our results imply that underlying mechanisms for the positive diversity-productivity relationship differ between native and exotic communities in the early stages of community development, and that differential responses of plant functional groups to generalist herbivory can contribute to this pattern.
机译：生物多样性实验表明，生产力通常随植物物种的丰富而增加。但是，这些研究大多数都忽略了营养相互作用对多样性-生产力关系的重要性，而侧重于丧失本地物种而忽略了外来物种的入侵。然而，由于功能性互补和植物拮抗剂的影响在本地社区和外来社区之间可能会有所不同，因此当本地社区受到外来物种入侵时，多样性-生产力关系可能会发生变化。我们进行了介观试验，测试了异国草场和本土草场组合之间的多样性效应，均匀性和生产力如何差异，以及这些草食草对这些群落的影响。与其他实验一致，我们发现异国情调的生产力比本地社区更高。但是，不同的机制（互补效应与选择效应）促成了外来社区与本土社区之间积极的多样性-生产力关系。出乎意料的是，土著社区的平整度低得多，选择效应更大，这表明土著物种之间的竞争优势可能甚至比外来物种更强。 ug食草动物降低了生产力，而与物种起源和物种多样性无关。然而，在没有of的情况下，外来社区表现出比本地社区高三倍的互补效应，这主要是由于本地和外来豆科植物和非豆科植物的反应差异所致。我们的结果暗示，在社区发展的早期，本地社区和外来社区之间积极的多样性-生产率关系的潜在机制不同，并且植物功能群对通才草食动物的不同反应可能有助于这种模式。

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