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息地连接对草原关节动物元社区结构的影响:基于现场的实验性理论测试
Franklin Bertellotti1, Nathalie R Sommer1, Oswald J Schmitz1
1School of the Environment Yale University New Haven Connecticut USA.
Ecology and evolution
|November 29, 2023
概括
息地连接对于较少移动的陆地关节动物至关重要,影响了它们的丰富性和食用相互作用. 保护工作应优先考虑这些重要土壤生物的息地连接性.
科学领域:
- 生态生态学 生态生态学
- 保护生物学 保护生物学
- 景观生态学 景观生态学
背景情况:
- 超社区理论通过物种相互作用和空间过程来解释生物多样性模式.
- 这一理论在保护方面具有影响力,但缺乏广泛的现场验证.
- 关键预测,如息地连接对社区结构的影响,需要经验测试.
研究的目的:
- 实验测试超社区理论的预测,即减少息地连接性会破坏社区结构.
- 调查不同息地连接对关节动物丰富性,多样性和食用相互作用的影响.
- 评估高度移动 (飞行) 和不那么移动 (地面) 关节动物之间的差异反应.
主要方法:
- 一个实验性的旧田草地被操纵了2年,创造了四个息地连接级别:控制,完全,部分和没有连接.
- 关节动物的丰富性和多样性 (alpha和beta) 用粘性和陷陷来测量.
- 这项研究重点关注飞行和地面节肢动物群落.
主要成果:
- 息地连接显著影响了不太移动的地面关节动物,但不是高度移动的飞行关节动物.
- 与孤立的地块相比,连接 (对照和部分) 的地块上,地面关节动物的丰度更高.
- 增加息地连接性正面相关的捕食者-微型-破坏性动物相互作用,但不是捕食者-宏观-破坏性动物相互作用.
结论:
- 息地连接性是塑造地面关节动物元社区结构的关键因素.
- 保护和恢复战略必须纳入息地连接性,因为陆地节肢动物的生态系统角色.
- 管理计划应考虑土壤动态性较低的动物群的特殊需求,以有效地保护生物多样性.
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