动态的,多尺度的分析表明,场地和景观层面的森林覆盖率提高了黄嘴和黑嘴古古的年间营业额
Claire A Johnson1,2, Thomas J Benson1,2
1Illinois Natural History Survey, Prairie Research Institute University of Illinois, Urbana-Champaign Champaign Illinois USA.
Ecology and evolution
|February 9, 2024
概括
繁殖鸟类息地使用情况每年都会有所不同. 这项研究证实了黑嘴和黄嘴的年复一年的大幅变化,突出了保护的动态息地需求.
科学领域:
- 鸟类生态学 鸟类生态学
- 保护生物学 保护生物学
- 野生动物管理管理
背景情况:
- 繁殖鸟类研究通常假定分布稳定,但一些物种表现出明显的年复一年的息地变化.
- 稀有和下降的物种,如黑嘴 (Coccyzus erythropthalmus) 和黄嘴 (C. americanus) 可能具有高的年间繁殖场所周转率,使息地关联研究复杂化.
- 难以发现这些难以捉摸的物种可能会膨胀营业额的估计,并掩盖真正的息地偏好.
研究的目的:
- 调查和量化黑嘴和黄嘴的年间繁殖场所周转率.
- 确定影响这两种库库物种占用动态的景观和小规模息地变量.
- 通过了解的动态息地要求,为保护和管理策略提供信息.
主要方法:
- 2019年和2020年在伊利诺伊州41个地点进行广播调查,以增加检测概率.
- 采用动态,多尺度的占用率分析来区分检测概率与年间营业额.
- 分析了检测/非检测数据,以模拟两种物种的息地使用和占用动态.
主要成果:
- 发现了强有力的证据,表明黑嘴和黄嘴的年间营业额有所增加,年年间占用率分别增加了20%和21%.
- 黑嘴古古喜欢那些周围森林较少,植被较为密集的地方.
- 黄嘴占据了更大的树冠覆盖面,避免了开发区,并喜欢更短的亚树冠层.
结论:
- 黑嘴和黄嘴的动态息地使用需要在更广泛的空间尺度上协调保护工作.
- 管理策略应包括在较少森林地区为黑嘴创造更大面积的密集灌木.
- 森林管理侧重于不太发达的景观中的开放式地下植物将有利于黄嘴.
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