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作为对欧洲杆种植制度的回应,木种群动态

Nino Maag¹, Fränzi Korner-Nievergelt¹, Jakub Szymkowiak^2,3

¹Swiss Ornithological Institute, Sempach, Switzerland.

|December 1, 2023

概括

增加树杆播种频率对木 (Phylloscopus sibilatrix) 种群产生负面影响. 更频繁的杆播种事件导致这些鸟类的繁殖成功降低和种群减少.

科学领域:

生态生态学生态生态学
人口动态人口动态
动物行为动物行为

背景情况:

巨播种,一个大规模的,同步的种子生产活动,创造了影响生态系统的资源脉冲.
杆播种频率的增加与欧洲木种群的减少相吻合.
在杆年后,捕食者的丰富性增加,导致像木这样的物种更高的巢穴掠食.

研究的目的:

调查是否增加杆播种频率有助于树木种群减少.
评估杆播种频率,生殖产量和人口趋势之间的关系.
确定杆播种频率是否解释了木种群动态的区域差异.

主要方法:

在四个中欧研究区域测量了木的繁殖产量.
利用矩阵人口模型,根据生殖产量和杆频率预测人口趋势.
将模型预测与观察到的人口趋势进行比较,以验证杆播种的影响.

主要成果:

在杆播种事件发生后的几年里,生殖产量显著下降.
研究区域的杆播种频率较高 (每2年至2.5年) 显示木种群的数量正在下降.
种植频率较少 (每4年一次) 的杆种植区域有稳定或近乎稳定的种群.
矩阵人口模型准确地预测了人口趋势的区域差异.

结论:

杆播种频率的增加可能是木种群减少的原因之一.
杆播种的级联生态影响可能会对不食用种子的物种产生负面影响.
预计杆播种频率的进一步增加将加剧木种群的减少.

关键词:

非洲-北极地区的移民.它们是类鸟类 (Passeriformes).鸟类鸟类鸟类鸟类鸟类叶落树林的树林.他们的生育能力.杆是为了杆.矩阵人口模型.人口趋势人口趋势生产力生产力生产率的提高.热带相互作用热带相互作用

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