Disturbance legacy of a 100-year flood event: large wood accelerates plant diversity resilience on gravel-bed rivers
Disturbance legacy of a 100-year flood event: large wood accelerates plant diversity resilience on gravel-bed rivers
复制标题
100年一遇的洪水事件的干扰遗产：大木材加速了砾石河床的植物多样性恢复力
DOI：
10.1016/j.jenvman.2022.115467
复制
发表时间：
2022
影响因子：
8.7
通讯作者：
Nakamura Futoshi
中科院分区：
文献类型：
--
作者：
Uchida Kei;Okazaki Azumi;Akasaka Takumi;Negishi Junjiro N.;Nakamura Futoshi
了解生物多样性在重大干扰后的恢复能力是基础科学和应用科学的一个关键问题。砾石河床河流中的植物多样性受到洪水事件的影响，洪水事件是水流状态中最有效的干扰因素之一，影响物种分布和生态系统动态。虽然干扰在群落组装机制中起着至关重要的作用，但植物多样性在严重干扰（如百年一遇的洪水事件）后如何恢复仍然未知。本研究探讨了如何在砾石床河流生态系统的大木材的干扰遗产有助于恢复植物多样性。本研究表明，在干扰遗产地，即沉积的大木遗址，植物物种的恢复力高于开放生境的网站。指示种分析表明，多年生植物是干扰遗产地最重要的指示种。这些结果表明，多年生物种丰富度有助于恢复高植物多样性在该地区的干扰遗产网站。在重大洪水事件发生后，土地管理人员经常清除大块木材和碎片堵塞，以避免二次灾害，如堤坝坍塌。然而，我们建议在砾石层上保留大量木材，以帮助恢复生物多样性和生态系统。此外，了解干扰遗产与生态系统恢复力之间的关系有助于制定未来可持续生态系统管理和生物多样性保护的战略。
Understanding biodiversity resilience after a major disturbance is a key issue in basic and applied science. Plant diversity in gravel-bed rivers is affected by flood events, which are one of the most effective disturbance agents in the flow regime, affecting species distribution, and ecosystem dynamics. Although disturbance plays a critical role in community assembly mechanisms, how plant diversity recovers after a severe disturbance, such as a 100-year flood event remains unknown. The present study examined how the disturbance legacy of large wood in gravel-bed river ecosystems contributes to the resilience of plant diversity. The present study demonstrated that the resilience of plant species in disturbance legacy sites, namely deposited large wood sites, was higher than that in open habitat sites. Indicator species analysis revealed that perennial plants were the most important indicator species of disturbance legacy sites. These results suggest that perennial species richness contributes to the resilience of high plant diversity across the disturbance legacy sites in this region. After major flood events, land managers often remove large wood and debris jams to avoid secondary disasters, such as embankment collapse. However, we suggest that large wood should be retained on the gravel beds to aid the recovery of biodiversity and ecosystems. Furthermore, understanding the relationships between disturbance legacies and ecosystem resilience can contribute to the formulation of strategies for sustainable ecosystem management and biodiversity conservation in the future.