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侵入性植物对湿地和溪流缓解本土植被群体的影响

Douglas A DeBerry¹, Dakota M Hunter²

¹Environment and Sustainability Program, College of William & Mary, Williamsburg, VA 23187, USA.

|April 26, 2024

概括

本地植物群落在适度入侵物种水平 (5-10%的丰度) 上壮成长. 目前的低入侵物种标准可能会比必要的更多地损害本地生物多样性,建议对减缓地点进行修订的10%标准.

科学领域:

生态生态学生态生态学
保护生物学保护生物学
恢复生态学恢复生态学

背景情况:

侵入性植物物种对本地生物多样性和生态系统功能构成重大威胁.
目前在减缓地点的入侵物种管理策略通常采用较低的丰度值.
在恢复息地的不同丰度水平下,入侵物种对生态的影响尚未完全理解.

研究的目的:

评估入侵植物丰度对湿地和溪流缓解区域本土植被群落的影响.
确定最佳的入侵物种丰度值,以平衡本土生物多样性保护与管理目标.
为减缓项目制定更有效的入侵物种绩效标准提供信息.

主要方法:

在弗吉尼亚州沿海平原和皮埃蒙特州的入侵梯度上进行了植被调查.
沿着入侵者丰富度梯度评估了本地物种丰富度,多样性和花质量.
在未被入侵,中度入侵和高度入侵地区之间比较了本地物种组成.

主要成果:

本地物种的丰富性,多样性和植物质量在中等入侵水平 (5-10%的相对入侵者丰度) 达到顶峰.
在未入侵和中度入侵的地点之间,本地物种的组成仍然相似,只有在入侵者数量较高时才会下降.
目前的低入侵物种值 (例如,<5%) 可能会导致通过非选择性控制方法不必要地丧失本地物种.

结论:

对于湿地和溪流缓解区域,建议修订10%相对丰度的入侵物种绩效标准.
这种略高的标准可以防止可取本地物种的不必要死亡,同时仍然可以管理入侵种群.
将警的入侵植物映射与本修订标准相结合,为缓解管理提供了一个平衡的方法.

关键词:

生态性能标准生态性能标准侵袭性植物管理侵袭性植物管理侵入性植物物种的入侵性植物物种.流量减缓流量减缓湿地缓解湿地缓解

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