侵袭时间影响了生态恢复实验中的多个尺度,指标和生物多样性结果的各个方面
Emma Ladouceur1,2,3,4, Michael Wohlwend5, Michele R Schutzenhofer6
1Department of Biology, University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada.
概括
防止Lespedeza cuneata入侵植物在草原恢复的早期至关重要. 延迟其入侵允许本地植物建立,使生物多样性在各种规模和方面受益.
科学领域:
- 生态恢复 生态恢复
- 侵入性物种管理 侵袭性物种管理
- 生物多样性科学是生物多样性的科学.
背景情况:
- 退化的草原需要有效的恢复协议.
- 了解恢复治疗如何影响生物多样性至关重要.
- 多样性反应可以根据空间规模,多样性指标和方面而有所不同.
研究的目的:
- 评估恢复处理 (种子混合物,营养物质,侵入性时间) 如何影响草原生物多样性.
- 通过Hill数来分析地方和区域范围内的多样性.
- 评估分类学,功能和遗传学多样性的反应.
主要方法:
- 长期的因数实验在一个退化的密苏里州草原.
- 生物多样性的种子混合物和营养添加物的实验应用.
- 对Lespedeza cuneata的入侵时间的操纵.
主要成果:
- 侵入性植物定时显著影响了多样性;添加营养素的效果有限.
- 由于L. cuneata的早期入侵,由于高主导地位,抑制了整体多样性.
- 晚期入侵增强了多样性,其影响随着空间规模的增加而增加,有利于分类学多样性.
结论:
- 早期排除入侵物种对于成功的草原恢复至关重要.
- 考虑多种多样性方面和规模,可以全面了解恢复结果.
- 恢复战略应优先考虑防止早期侵袭,以促进本地植物的建立和长期生物多样性益处.
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