以白头鹤(Grus monacha)为例基于四种方法比较判断鸟类繁殖与否
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1.北京林业大学 生态与自然保护学院/国家公园学院 北京;2.大沾河湿地国家级自然保护区管理局

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国家自然基金(31770573,31570532)。


Testing four methods for estimation of birds breeding or not, taking Hooded Crane (Grus monacha) as an example
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Affiliation:

1.School of Ecology and Nature conservation &2.School of national park,Beijing Forestry University;3.Dazhanhe Wetland National Nature Reserve Administration,Heilongjiang Heihe

Fund Project:

The National Natural Science Foundation of China (31770573,31570532)

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    摘要:

    繁殖期是鸟类生活史的一个重要阶段。探究鸟类繁殖状态及繁殖巢位置能够为珍稀濒危动物种群的保护提供基础数据。大型水禽的繁殖地隐蔽且位于偏远地区,难以通过实地观察进行识别。近年来,卫星追踪系统和数据分析技术的进步极大地改进了识别鸟类运动模式和繁殖状态的方法,通过将运动模型拟合到轨迹数据来分类运动模式,从而识别其运动状态。以白头鹤(Grus monacha)为例,通过比较基于卫星跟踪数据的三种分析方法以及野外监测方法,旨在探究安全且便捷的方法判别鸟类是否繁殖并获取巢址的相关信息。结果表明,白头鹤从五月初至六月初利用巢址繁殖,持续天数约为31天,且对繁殖巢址的位置具有忠诚度。四种判别鸟类繁殖与否的方法各有利弊。卫星跟踪数据三种分析方法所得到的结果具有一定的一致性(Kappa = 0.685),但实际观测的结果与另外三种方法差异较大。其中有10条数据通过实际观测的方法判断该年白头鹤未繁殖,而另外三种统计分析方法均判断为繁殖。三种方法计算的筑巢开始时间、孵化结束时间、繁殖时长以及巢址经纬度均无显著差异。巢址利用天数的一致性一般,而筑巢开始和结束时间的一致性较高。三种方法确定的白头鹤巢址位置基本一致,主要分布于黑龙江省、俄罗斯哈巴洛夫斯克边疆区、阿穆尔州和犹太自治州。同一只白头鹤夏季繁殖位置较为固定。利用nestR包的分析方法最为便利,结果直观,但准确性还需提高。实际观测虽能准确判断当年个体是否繁殖成功,但费时费力,结果不够充分。因此建议主要利用nestR包判断水鸟繁殖位点及时间,辅以recurse包以及位移-时间曲线方法,并结合野外调查的方法进一步调整参数,以增加结果准确性并进行验证。该研究将为判断珍稀濒危物种的繁殖状态并进一步提供保护策略提供方法支撑。

    Abstract:

    Breeding represents a crucial phase in avian life cycles, and understanding their breeding status and nest site locations is essential for conserving endangered species. However, for those large waterbirds, their breeding sites are often hidden and located in remote areas, making them difficult to identify through field observations. Recent advancements in satellite tracking systems and data analysis have significantly improved methods for identifying bird movement patterns and breeding status, which classify movement patterns by fitting movement models to trajectory data, enabling the identification of bird movement states. In this study, we compared the accuracy in determining breeding status and identify nesting sites of three safe and convenient satellite tracking-based methods (displacement-time curve method, nestR package and recurse package in R program) using Hooded Crane (Grus monacha) as a case study. Our aim is to provide an efficient and accurate method for identifying bird nesting sites. The results showed that Hooded Cranes utilized nest sites for breeding from early May to early June, with a duration of approximately 31 days. They exhibited site fidelity to their breeding nest locations. Each method exhibited unique advantages and limitations. The three satellite tracking-based methods produced consistent results (Kappa = 0.685), while field observations yielded significantly different outcomes. Regarding Hooded Crane breeding data, 10 cases classified as non-breeding through field observations were identified as breeding by all three satellite tracking-based methods. No significant differences were found in nesting start date, hatching end date, breeding duration, or nest site locations across methods. The consistency of nest site usage days was moderate, while the consistency of nesting start and end dates was high. The locations of White-naped Crane nest sites identified by the three methods were largely consistent, mainly distributed in Heilongjiang Province, Russia's Khabarovsk Krai, Amur Oblast, and the Jewish Autonomous Oblast. The summer breeding locations of individual White-naped Cranes were relatively fixed. The nestR package emerged as the most user-friendly tool among tested methods, providing intuitive results despite requiring accuracy enhancements. Among the methods tested, the nestR package proved to be the most convenient, with intuitive results, though its accuracy requires further improvement. We recommend primarily employing the nestR package for assessing waterbird breeding sites and timing, supplemented by the recurse package and displacement-time curve method. Parameter adjustments should be implemented to enhance accuracy, with results validated through integration with field survey methods. This study provides methodological support for determining the reproductive status of rare and endangered species and further providing conservation strategies.

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王颖君,李显达,谷彦昌,郭玉民.以白头鹤(Grus monacha)为例基于四种方法比较判断鸟类繁殖与否.生态学报,,(). http://dx. doi. org/[doi]

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