尼日利亚中北部阿穆鲁姆保护区回声定位蝙蝠群落活动的时间变化

C. Emmanuel, S. Manu
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引用次数: 0

摘要

研究了阿穆鲁姆森林保护区及其周边4种生境类型(廊道林、稀树草原、岩石露头和农田)对回声定位蝙蝠群落活动的时间变化影响。利用在不同栖息地进行的基于样条的声学调查,根据野外调查中记录的每分钟蝙蝠通过的次数,将蝙蝠的活动分为黄昏后(19:00-23:00)和黎明前(02:00-06:00)两组。日落后的蝙蝠活动明显高于日出前。在日落后和日出前几个小时,农田的活动没有显著变化。在走廊森林中,夜晚的两个时间对蝙蝠的活动都有显著影响,而在大草原和岩石露头栖息地,只有日落后几个小时才对蝙蝠的活动有显著影响。在日落前几个小时,农田表现出不同的趋势,对蝙蝠的活动有显著影响。阿穆鲁姆保护区的回声定位蝙蝠群落在日落后的几个小时比日出前的几个小时更活跃。我们建议在日落之后的几个小时,作为更合适的时间来调查回声定位蝙蝠物种通过声学方法。在日落后的几个小时内,保护区的管理可以很好地避免在保护区内的人类活动,使保护区内的回声定位蝙蝠群落发挥最大的作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Temporal Variation in the Activity of Echolocating Bat Community in Amurum Reserve North Central Nigeria
The effect of temporal variation on activity of the echolocating bat community was determined in four habitat types in and around Amurum Forest Reserve: (i) gallery forest, (ii) savannah, (iii) rocky outcrop, and (iv) farmland. Using transect-based acoustic surveys in the various habitats, bat activity was estimated based on the recorded number of bat passes per minute of echolocation recordings from the field survey grouped into hours after dusk (19:00-23:00) and hours before dawn (02:00-06:00). Bat activity was significantly higher in hours after sunset than hours before sunrise. Activities did not vary significantly in the farmland between hours after sunset and hours before sunrise. In the gallery forest both times of the night had significant impact on bat activity, while in savannah and rocky outcrop habitats only hours after sunset did have significant effect on bat activity. The farmland showed a different trend by hours before sunset having a significant impact on bat activity. Echolocating bat communities in Amurum Reserve are more active during the hours after sunset than hours before sunrise. We recommend hours after sunset as more suitable period for surveying echolocating bat species through acoustic methods. The managements of reserves may do well in avoiding human activities in the protected areas during hours after sunset for maximum performance of the echolocating bat communities in the reserves.
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