Scholarlink

<p>Birds are the dominant seed predators of <i>Araucaria araucana</i> in Chilean temperate forests, inflicting five times more seed damage in the canopy compared to ground-level predation. We evaluated predation intensity by comparing two sites with contrasting anthropogenic disturbances histories using a partial exclosure design over 3&#xa0;years (2016–2018). Paradoxically, the presence of livestock reduced overall seed predation by 82%, suggesting an indirect suppression of native granivore activity consistent with the “landscape of fear” hypothesis. Furthermore, the site with 15-year livestock exclusion showed 2.3-fold higher native granivore activity. This demonstrates that management history shapes local trophic structure through lasting cascading effects. While rodents are significant predators, their caching of 31% of handled seeds also reveals overlooked dispersal services. These findings underscore the importance of integrating management history, phenology, and predator functional roles into strategies for conserving this endangered species.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Differential impact of predator functional groups on Araucaria araucana seed predation

  • 期刊论文

  • 发表日期：

    2025年12月2日

查看全文
  • Eduardo Acuña,
  • Rolando Rodríguez,
  • Simón Sandoval,
  • Rodrigo Hasbún,
  • Francisco Montecino,
  • Burkhard Müller-Using,
  • Fernando Olave,
  • Rafael Carrasco

摘要

Birds are the dominant seed predators of Araucaria araucana in Chilean temperate forests, inflicting five times more seed damage in the canopy compared to ground-level predation. We evaluated predation intensity by comparing two sites with contrasting anthropogenic disturbances histories using a partial exclosure design over 3 years (2016–2018). Paradoxically, the presence of livestock reduced overall seed predation by 82%, suggesting an indirect suppression of native granivore activity consistent with the “landscape of fear” hypothesis. Furthermore, the site with 15-year livestock exclusion showed 2.3-fold higher native granivore activity. This demonstrates that management history shapes local trophic structure through lasting cascading effects. While rodents are significant predators, their caching of 31% of handled seeds also reveals overlooked dispersal services. These findings underscore the importance of integrating management history, phenology, and predator functional roles into strategies for conserving this endangered species.