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Comparison of bird migration in a radar wind profiler and a dedicated bird radar
Remote Sensing in Ecology and Conservation ( IF 3.9 ) Pub Date : 2023-06-13 , DOI: 10.1002/rse2.350
Nadja Weisshaupt 1 , Maxime Hervo 2 , Birgen Haest 3
Remote Sensing in Ecology and Conservation ( IF 3.9 ) Pub Date : 2023-06-13 , DOI: 10.1002/rse2.350
Nadja Weisshaupt 1 , Maxime Hervo 2 , Birgen Haest 3
Affiliation
Various types of radar systems are increasingly being used to monitor aerial biodiversity. Each of these types has different detection capabilities and sensitivities to environmental conditions, which affect the quantity and quality of the measured objects of interest. Radar wind profilers have long been known to detect birds, but their use in ornithology has remained limited, largely because of biologists' unfamiliarity with these systems. Although the potential of radar wind profilers for quantitative bird monitoring has been illustrated with time series of raw data, a comparison with a similar radar system more established in biology is missing. Here, we compare nocturnal bird migration patterns observed by a radar wind profiler during October 2019 and April 2021 with those from a dedicated bird radar BirdScan MR1. The systems were located 50 km apart with an altitudinal difference of about 850 m. The nightly migration intensities measured with both systems were highly correlated in both spring and autumn (Pearson correlation coefficient ≈ 0.8, P < 0.001), but estimated traffic measured by the radar wind profiler was on average five times higher in spring and nine times higher in autumn. Low ratios of the migration traffic rates of the Birdscan MR1 to those of the radar wind profiler occurred primarily in clear conditions. In both radar systems, migration occurred at significantly higher altitudes in spring than in autumn. Discrepancies in absolute numbers between both systems are likely due to both system-inherent and external environmental and topographical factors, but also different quantification approaches. These findings support the capacity of radar wind profilers for aerial biomonitoring, independent of environmental conditions, and open up further avenues for studying the impact of weather on bird migration at detailed temporal and altitudinal scales.
中文翻译:
雷达风廓线仪和专用鸟类雷达中鸟类迁徙的比较
各种类型的雷达系统越来越多地用于监测空中生物多样性。每种类型都有不同的检测能力和对环境条件的敏感性,这会影响感兴趣的测量对象的数量和质量。人们早就知道雷达风廓线仪可以探测鸟类,但它们在鸟类学中的应用仍然有限,很大程度上是因为生物学家对这些系统不熟悉。尽管雷达风廓线仪用于定量鸟类监测的潜力已经通过原始数据的时间序列得到了说明,但缺少与生物学中更成熟的类似雷达系统的比较。在这里,我们将 2019 年 10 月和 2021 年 4 月期间雷达风廓线仪观测到的夜间鸟类迁徙模式与专用鸟类雷达 BirdScan MR1 观测到的夜间鸟类迁徙模式进行了比较。系统相距 50 km,海拔高度差约 850 m。两个系统测量的夜间迁徙强度在春季和秋季都高度相关(皮尔逊相关系数 ≈ 0.8,P < 0.001),但雷达风廓线仪测量的估计流量在春季平均高出五倍,在秋季高出九倍。秋天。Birdscan MR1 的迁移流量率与雷达风廓线仪的迁移流量率的低比率主要发生在晴朗的条件下。在这两个雷达系统中,春季迁移发生的海拔高度明显高于秋季。两个系统之间绝对数量的差异可能是由于系统固有和外部环境和地形因素以及不同的量化方法造成的。这些发现支持了雷达风廓线仪独立于环境条件进行空中生物监测的能力,并为在详细的时间和高度尺度上研究天气对鸟类迁徙的影响开辟了进一步的途径。
更新日期:2023-06-13
中文翻译:
雷达风廓线仪和专用鸟类雷达中鸟类迁徙的比较
各种类型的雷达系统越来越多地用于监测空中生物多样性。每种类型都有不同的检测能力和对环境条件的敏感性,这会影响感兴趣的测量对象的数量和质量。人们早就知道雷达风廓线仪可以探测鸟类,但它们在鸟类学中的应用仍然有限,很大程度上是因为生物学家对这些系统不熟悉。尽管雷达风廓线仪用于定量鸟类监测的潜力已经通过原始数据的时间序列得到了说明,但缺少与生物学中更成熟的类似雷达系统的比较。在这里,我们将 2019 年 10 月和 2021 年 4 月期间雷达风廓线仪观测到的夜间鸟类迁徙模式与专用鸟类雷达 BirdScan MR1 观测到的夜间鸟类迁徙模式进行了比较。系统相距 50 km,海拔高度差约 850 m。两个系统测量的夜间迁徙强度在春季和秋季都高度相关(皮尔逊相关系数 ≈ 0.8,P < 0.001),但雷达风廓线仪测量的估计流量在春季平均高出五倍,在秋季高出九倍。秋天。Birdscan MR1 的迁移流量率与雷达风廓线仪的迁移流量率的低比率主要发生在晴朗的条件下。在这两个雷达系统中,春季迁移发生的海拔高度明显高于秋季。两个系统之间绝对数量的差异可能是由于系统固有和外部环境和地形因素以及不同的量化方法造成的。这些发现支持了雷达风廓线仪独立于环境条件进行空中生物监测的能力,并为在详细的时间和高度尺度上研究天气对鸟类迁徙的影响开辟了进一步的途径。