根据一个新热带盐沼地区特有鸟类的种群生存能力分析预测的短期灭绝
Giovanna Sandretti-Silva1, Fabio Stucchi Vannucchi2, Larissa Teixeira3
1Departamento de Ciências Biológicas e Ambientais, Universidade Estadual Paulista (UNESP), Instituto de Biociências, Praça Infante Dom Henrique, S/No, São Vicente, 11330-900, Brazil. giovanna.sandretti@unesp.br.
Environmental monitoring and assessment
|May 7, 2024
概括
盐沼鸟类面临诸如洪水和掠食等威胁. 种群生存分析 (PVA) 显示,如果不进行保护,这种临灭绝的物种可能会在2054年灭绝,但管理可以确保稳定.
科学领域:
- 生态生态学 生态生态学
- 保护生物学 保护生物学
- 鸟类学 鸟类学是一门学科.
背景情况:
- 盐沼面对鸟类居民构成重大挑战,包括巢穴洪水,倾斜和掠食.
- 海平面上升和入侵物种加剧了这些威胁,影响了鸟类种群.
- 人口生存分析 (PVA) 是评估保护需求和人口趋势的关键工具.
研究的目的:
- 为了对临灭绝的新热带鸟类物种进行种群生存分析 (PVA),Formicivora acutirostris,是盐沼地的特有物种.
- 评估保护行动的紧迫性和管理策略对该物种的潜在有效性.
- 在各种场景下建模未来的人口趋势,包括悲观,乐观,基线和保护管理.
主要方法:
- 人口统计数据 (性别比,寿命,生产率,生存率,死亡率) 收集了2006年至2023年期间巴西南部的Formicivora acutirostris.
- 人口生存能力分析 (PVA) 在133年的时间内 (从1990年开始) 使用四种不同的场景进行.
- 场景包括悲观,乐观,基线和保护管理 (增加招募/息地保护).
主要成果:
- 在所有评估的场景中,预计人口减少,在悲观的场景下,到2054年灭绝的概率为100%.
- 乐观情景显示没有灭绝,而保护情景预计人口稳定.
- 保护管理,包括16%的生产率增加和10%的第一年生存率改善,稳定了种群.
结论:
- 由于息地挑战和潜在的掠食行为,Formicivora acutirostris面临着高度的灭绝风险,由于分布分散而加剧的潜在掠食.
- 这种物种依赖于保护,需要立即和有针对性的干预.
- 建议的保护策略包括辅助殖民,捕食者控制,息地恢复和现场保护工作.
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