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行为和景观背景决定了人工光对两个夜鸟类物种的影响

Carrie Ann Adams^1,2, Colleen Cassady St Clair¹, Elly C Knight³

¹Department of Biological Sciences, University of Alberta, CW 405, Biological Sciences Building, Edmonton, AB Canada.

Landscape ecology

|March 29, 2024

概括

夜间人工照明 (ALAN) 给夜提供了有限的食效益,主要是在非城市地区. 然而,ALAN增加了地面鸟的掠食风险,突出了减少它们息地的光污染的必要性.

科学领域:

生态生态学生态生态学
鸟类学鸟类学是一门学科.
环境科学环境科学

背景情况:

夜间人工照明 (ALAN) 是一个日益严重的全球性问题,对生态产生重大影响.
空中食虫者,包括夜 (Caprimulgidae),可能会利用被光源所吸引的昆虫.
艾伦可以增加巢穴的可见性和掠食风险,特别是在地面筑巢的物种.

研究的目的:

调查ALAN对夜种群的双重影响:潜在的食利益与掠食成本.
为了测试这些假设在不列颠哥伦比亚省的两个夜物种:常见的夜 (Chordeiles minor) 和常见的 (Phalaenoptilus nuttallii).

主要方法:

使用加拿大夜调查数据建模了ALAN和相对丰度之间的关系.
根据翅膀的行为区分领土和境外常见夜.

主要成果:

获取食利益的有限支持:境外常见夜在非城市地区的ALAN数量增加.
对于常见的夜来说,与ALAN的负相关性出现在城市土地覆盖率为18%或更多的地区.
对于常见的Poorwills和领土常见的夜,发现了与ALAN的强烈负面关联,支持了巢穴掠食假说.

结论:

对于夜来说,ALAN的食益处似乎仅限于非城市地区和能够在筑巢区域之外食的物种.
由于掠食风险增加,ALAN对夜的负面影响在物种和景观之间是一致的.
减少繁殖息地的光污染对于保护地面息的夜和其他鸟类物种至关重要.

关键词:

晚上的人工光.鸟类生态学鸟类生态学它们是Caprimulgiformes的类型.昆虫捕食者昆虫捕食者光线污染光线污染

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