基于功能特征的恢复改变了夏威夷低地湿林的营养循环和入侵率
Nicole DiManno1, Rebecca Ostertag1, Amanda Uowolo2
1Department of Biology, University of Hawai'i at Hilo, Hilo, Hawaii, USA.
概括
使用具有保守营养使用特征的物种进行恢复,可以减少退化的生态系统中的营养循环和入侵率. 多样化的物种多样化.
科学领域:
- 恢复生态学 恢复生态学
- 侵袭性物种管理 侵袭性物种管理
- 营养循环的动态 营养循环的动态
背景情况:
- 退化的生态系统经常表现出被入侵物种驱动的营养动态变化,使得营养的可用性难以控制.
- 侵入性物种具有特征,使它们能够超越本地物种并改变环境条件,包括营养周转率.
研究的目的:
- 调查是否基于功能特征的恢复方法,使用具有保守营养使用特征的物种,可以降低营养循环和入侵率.
- 评估混合森林社区在夏威夷海洛严重入侵的低地湿林中的有效性.
主要方法:
- 使用本地和引入物种建立了四个实验混合森林社区,碳循环率 (缓慢/中等) 和特征空间关系 (冗余/互补) 不同.
- 将实验社区与被入侵的参考森林进行比较.
- 五年后评估社区一级的结果,包括通过垃圾和分解的营养循环 (碳,,),外围植物的生产力和入侵率.
主要成果:
- 实验社区通过垃圾降落显示营养循环较低,而不是被入侵的参考.
- 适度 (MOD) 营养循环社区释放的营养比缓慢 (SLOW) 社区更多.
- 在MOD群落中引入的物种释放的营养比本地物种更多;较高的外生植物基底面积与较低的入侵率相关,特别是在补充 (COMP) 治疗中.
结论:
- 使用混合社区的功能性特征性恢复可以减少营养循环和入侵.
- 多样化特征空间,即使是引入的物种,也可以增强对入侵的抵抗力.
- 这种方法为管理严重退化的生态系统提供了一个有希望的战略,尽管仍然存在挑战.
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