世界上最危的海物种的气候媒介人口动态
Michael D Arendt1, Jeffrey A Schwenter2, David W Owens3
1South Carolina Department of Natural Resources, Marine Resources Division, 217 Fort Johnson Road, Charleston, SC, 29412, USA. arendtmd@dnr.sc.gov.
Scientific reports
|September 2, 2023
概括
由于年龄结构和气候,而不是仅仅是密度,Kemp's Ridley海巢数可能会稳定下来. 改善生存率和繁殖率是了解这个危物种的恢复趋势的关键.
科学领域:
- 海洋生物学 海洋生物学
- 保护科学 保护科学
- 人口生态学 人口生态学
背景情况:
- 肯普海 (Lepidochelys kempii) 由于历史上的过度捕捞和种群规模较小而处于危险之中.
- 尽管保护了50多年,但数尚未恢复到1947年的水平,这促使重新评估恢复因素.
研究的目的:
- 分析影响Kemp's Ridley海筑巢趋势的因素.
- 重新评估人口缓慢反弹的原因,并为保护战略提供信息.
- 基于新的分析,为恢复提供一个乐观的解释.
主要方法:
- 自1966年以来,分析了幼与巢的比例,以评估年龄结构稳定.
- 采用多重回归来识别落后的气候影响在化和化生产 (2006-2022).
- 利用人口模拟模型来评估人口统计率 (生存率,成熟年龄,繁殖间隔) 对筑巢趋势 (1966-2022) 的影响.
主要成果:
- 年龄结构稳定,而不是密度依赖,更好地解释了2005年后的筑巢趋势.
- 气候变量对每个巢的和幼产生了显著的滞后影响 (长达13年).
- 模型表明,高生存率,动态队列性别比率,成熟年龄和离合频率/回迁间隔最能解释长期筑巢模式.
结论:
- 筑巢趋势受到年龄结构,气候和人口统计率的结合的影响,为恢复提供了更细致的观点.
- 这些发现表明,需要完善对Kemp's ridley海的物种恢复标准和未来趋势预期.
- 这项研究为评估这个临灭绝的海的保护状况和恢复轨迹提供了一个新的视角.
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