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森林恢复处理通过花和温度介导的效应间接地使授粉网络多样化

Cora B Davies¹, Thomas Seth Davis^1,2, Terry Griswold³

¹Forest and Rangeland Stewardship, Warner College of Natural Resources, Colorado State University, Fort Collins, Colorado, USA.

Ecological applications : a publication of the Ecological Society of America

|October 21, 2023

概括

联邦政府在科罗拉多州启动的森林稀释计划通过增加蜜蜂的丰富性,多样性和花朵相互作用,对本地蜜蜂社区产生了积极的影响. 这些发现凸显了这种对授粉者的恢复工作的保护价值.

科学领域:

生态生态学生态生态学
保护生物学保护生物学
林业林业林业林业林业

背景情况:

联邦资助的森林稀释计划旨在恢复北美针叶树林中的历史森林结构.
这些恢复工作,特别是科罗拉多州的协作森林景观恢复计划 (CFLRP),涉及大面积的松树松林的稀薄.
这些稀释处理对敏感生物群落和生态系统功能的潜在影响需要彻底调查.

研究的目的:

研究机械稀释处理对本地蜜蜂群落及其与花朵的相互作用的影响.
为了比较蜜蜂的生物多样性,丰富性,丰富性和蜜蜂花网络模式,在稀薄与未稀薄的博多萨松树群中.
确定关键的驱动因素,如树冠的开放性,温度和鲜花的丰富性,影响蜜蜂群体在稀薄后.

主要方法:

机械稀释 (3-10年后处理) 和未稀释的 ponderosa松树木的比较.
用多种方法采样蜂群组合的样本,包括陷和网.
测量森林结构变化和花访问模式,以构建蜂花互动网络.
应用结构方程建模来分析树冠开放对蜜蜂群落的间接影响.

主要成果:

与未经稀释的种群相比,稀释的种群表现出明显更高的本地蜜蜂数量 (120%的增加),丰富性 (53%的增加) 和多样性 (37%的增加).
蜜蜂与花的交互网络显示,在稀疏的群体中,蜂群的化,丰富性和丰富性增加,同时在蜜蜂群体中功能冗余性更大.
结构方程建模显示,温度升高和花丰富度,由树冠开放度介导,是推动增强蜜蜂丰富度和稀疏区域丰富度的关键因素.
四个特定的花物种被确定为蜂花互动网络中的关键连接器.

结论:

机械稀释处理,通过增加树冠的开放性,间接地促进本土蜜蜂的α-多样性,并增强蜜蜂与花的相互作用.
协作森林景观恢复计划 (CFLRP) 的处理方法证明了 ponderosa 松树林中本土蜜蜂群体的重大保护价值.
建议进行长期监测,以评估这些稀释处理对授粉者群体和生态系统功能的持续影响.

关键词:

生物多样性生物多样性保护保护保护生态网络生态网络森林管理是森林的管理.授粉者是授粉者.野生土地 - 城市界面

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