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The impact of urban development and human disturbance on the numbers of nightjar Caprimulgus europaeus on heathlands in Dorset, England

机译:城市发展和人为干扰对英格兰多塞特郡荒地上夜鹰欧洲Cap的数量的影响

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The factors influencing the number of nightjars on 36 heathland sites (referred to as patches) in Dorset, England were examined using novel spatial integration of existing datasets. Surrogate measures of human density and settlement, including the amount of developed land at different distances from the heath (obtained from aerial photographs) and the actual number of buildings (obtained from Post Code databases) were all found to be highly correlated with each other and to show a strong negative relationship with the density of nightjars present on a patch, regardless of patch size. The amount of woodland (the preferred foraging habitat) surrounding each patch (within 500 in of the patch boundary) was also a significant predictor of nightjar numbers. When used together, the extent of woodland and developed land both gave significant improvements to predictions of nightjar density. The results indicate that the number of nightjars present on a heathland patch is influenced by the surrounding land-use and that the effect of urban development is more than just habitat loss. We suggest that trends identified are at least partly due to actual human presence on the heathlands and as such, human disturbance is potentially a problem for this species.
机译:使用现有数据集的新颖空间积分,研究了影响英格兰多塞特郡36个荒地站点(称为斑块)上夜鹰数量的因素。发现人类密度和居住的替代指标,包括距离荒地不同距离的已开发土地数量(从航空照片中获得)和实际建筑物数量(从邮政编码数据库中获得),都相互之间高度相关,并且不论补丁大小如何,均与补丁上存在的夜鹰的密度显示出强烈的负相关关系。每个斑块周围(斑块边界500英寸以内)的林地数量(首选觅食栖息地)也是夜鹰数量的重要预测指标。当一起使用时,林地和发达土地的面积都大大改善了夜莺密度的预测。结果表明,石南丛生地上存在的夜鹰数目受周围土地利用的影响,而城市发展的影响不仅仅是栖息地的丧失。我们建议确定的趋势至少部分是由于人类在荒地上的实际存在,因此,人类干扰对该物种来说可能是一个问题。

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