在社区集会期间的竞争互动:本地物种的身份,多样性和功能特征如何影响入侵
Dahui Jeong1,2, Kripal Singh1,3, Chaeho Byun4
1Department of Biological Sciences, Gyeongkuk National University, 1375 Gyeongdong-ro, Andong, Gyeongsangbuk-do, 36729, Republic of Korea.
Oecologia
|March 6, 2026
概括
原生植物的身份,而不是多样性,是抑制像Solidago altissima这样的入侵物种的关键. 快速生长的一年生和多年生植物为生态恢复提供了最好的竞争性抑制.
科学领域:
- 生态生态学 生态生态学
- 恢复生态学 恢复生态学
- 侵袭性物种管理 侵袭性物种管理
背景情况:
- 竞争性互动对于管理入侵物种和增强本土生物多样性至关重要.
- 了解植物社区属性如何影响竞争抑制对于有效的恢复至关重要.
- 侵入性的多年生草 Solidago altissima 对本土生态系统构成重大挑战.
研究的目的:
- 研究物种身份和社区多样性在竞争性抑制Solidago altissima中的作用.
- 评估不同本土植物功能组在抑制入侵物种生长方面的有效性.
- 通过识别最大限度地抑制竞争力的植物特征来告知恢复策略.
主要方法:
- 进行了一项为期两年的温室实验,以评估竞争互动.
- 在Solidago altissima和19种本土物种之间建立了对对比赛.
- 基于高度,覆盖面,密度和生物质的相对竞争指数 (RCI) 用于量化单一种植和四种混合物的入侵成功.
主要成果:
- 品种认同和功能群是竞争结果的主要驱动因素;14种本地物种显著抑制了Solidago altissima.
- 一年草 (RCI=0.608-0.771) 和多年草 (RCI=0.471-0.666) 显示出最强的抑制,而木质多年草是最不有效的 (RCI=0.197-0.250).
- 物种多样性有微小的积极影响,但不显著;竞争抑制在混合物中比单一种植更强烈,第二年 (混合物RCI=0.764,单一种植RCI=0.531).
结论:
- 侵略性物种的竞争性抑制主要是由本地物种及其功能组的身份驱动的,而不是多样性或特征相似性.
- 恢复工作应优先考虑本地一年生和多年生植物,特别是具有特征的树叶,如高特定叶面积,大种子质量和早期树冠优势的树叶.
- 基于身份和功能特征的本地物种的战略选择对于最大限度地抑制竞争并实现成功的生态恢复至关重要.
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