Identifying impactful sea turtle conservation strategies: a mismatch between most influential and most readily manageable life-stages

IF 2.6 2区 环境科学与生态学 Q2 BIODIVERSITY CONSERVATION Endangered Species Research Pub Date : 2024-05-08 DOI:10.3354/esr01326
Shane A. Richards, Christopher Cvitanovic, Michael Dunlop, Sabrina Fossette, Linda Thomas, Anton D. Tucker, E. Ingrid van Putten, Andrea U. Whiting, Scott D. Whiting, Alistair J. Hobday
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Abstract

ABSTRACT: Sea turtles worldwide face a range of threats including sea level rise and warming associated with climate change, predation by invasive species, plastic and light pollution, coastal development, and human interference. Conservation managers have a long history of aiding sea turtle populations, from protecting nests to head-starting hatchlings. Due to these challenges faced by turtles, there is a constant focus on assessing the likely success of proposed conservation interventions to help inform decision-making processes. We develop an age-based, spatially implicit population model for the north-west shelf stock of Australia’s endemic flatback turtle Natator depressus that estimates the long-term outcomes of a range of onshore and offshore conservation interventions. Analysis of the model shows that young adults contribute most to population growth (i.e. have highest expected future reproductive success); however, this is often the most difficult life stage to manipulate in the field. Observable outcomes of interventions are often delayed for many years, especially for on shore activities (e.g. protecting eggs and hatchlings), due to late age to maturity. The potential impact of warming-induced female bias on population dynamics was also investigated. Although such bias increases population growth rates in the short term, negative effects of the bias (e.g. reduced female mating success) and negative environmental effects (e.g. reduced survival rates, habitat loss) can lead to sustained declines. Population models can rapidly assess climate change and conservation impacts on turtle dynamics and can guide monitoring efforts for real-world application.
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确定有影响力的海龟保护战略:影响最大的生命阶段与最容易管理的生命阶段之间的不匹配
摘要:全球海龟面临一系列威胁,包括海平面上升和气候变化引起的气候变暖、入侵物种的捕食、塑料和光污染、海岸开发以及人为干扰。保护管理者长期以来一直在帮助海龟种群,从保护巢穴到启动幼龟。由于海龟面临的这些挑战,人们一直在关注评估建议的保护干预措施可能取得的成功,以便为决策过程提供信息。我们为澳大利亚特有的扁背海龟(Natator depressus)西北大陆架种群建立了一个基于年龄、空间隐含的种群模型,该模型估计了一系列陆上和近海保护干预措施的长期结果。对模型的分析表明,青壮年对种群增长的贡献最大(即预期未来的繁殖成功率最高);然而,这往往是现场最难操作的生命阶段。由于成熟年龄较晚,干预措施的可观察结果往往会延迟多年,尤其是岸上活动(如保护卵和幼体)。还研究了气候变暖引起的雌性偏向对种群动态的潜在影响。虽然这种偏向会在短期内提高种群增长率,但偏向的负面影响(如雌性交配成功率降低)和负面环境影响(如存活率降低、栖息地丧失)会导致种群数量持续下降。种群模型可以快速评估气候变化和保护对海龟动态的影响,并指导实际应用中的监测工作。
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来源期刊
Endangered Species Research
Endangered Species Research BIODIVERSITY CONSERVATION-
CiteScore
5.50
自引率
6.50%
发文量
38
审稿时长
31 weeks
期刊介绍: ESR is international and interdisciplinary. It covers all endangered forms of life on Earth, the threats faced by species and their habitats and the necessary steps that must be undertaken to ensure their conservation. ESR publishes high quality contributions reporting research on all species (and habitats) of conservation concern, whether they be classified as Near Threatened or Threatened (Endangered or Vulnerable) by the International Union for the Conservation of Nature and Natural Resources (IUCN) or highlighted as part of national or regional conservation strategies. Submissions on all aspects of conservation science are welcome.
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