Assessing the Impacts of Prescribed Fire and Bison Disturbance on Birds Using Bioacoustic Recorders

IF 0.6 4区 环境科学与生态学 Q4 Agricultural and Biological Sciences
Heather Herakovich, N. Barber, H. Jones
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引用次数: 2

Abstract

Abstract. Grassland bird responses to grazing and prescribed fire are species-specific and are primarily known from systems with cattle as the predominant grazer. There is less knowledge of how grazing by bison impacts grassland birds, especially in sites restored and reconstructed from row-crop agriculture. Working at a tallgrass prairie site consisting of restored and remnant prairie in the years following bison reintroduction and ongoing prescribed burning, we assessed overall species richness and the relative detection frequency of five focal species (Grasshopper Sparrow, Henslow's Sparrow, Dickcissel, Eastern Meadowlark, and Brown-headed Cowbird). We used stationary bioacoustics recorders to record the soundscape during the summer breeding season in areas with and without bison from 2016 to 2018. Species richness and the detection frequencies of our focal species were not influenced by bison disturbance. Grasshopper Sparrow and Dickcissel detection frequency increased slightly in response to prescribed fire, whereas Henslow's Sparrow detection frequency decreased. Time since sites were restored was a predominant factor that influenced the variation in detection frequency of Henslow's Sparrows and Eastern Meadowlarks, likely due to vegetation differences in restored versus remnant sites and each species' vegetation structure preferences. Brown-headed Cowbird detection frequency was unaffected by bison presence, prescribed fire, or time since restoration, but varied among sampling years. Our focal species showed no response to bison disturbance 4 y after the bison reintroduction. This suggests there could be a time-lag for a response or that these species will not respond to the bison reintroduction at this study site.
使用生物声学记录器评估规定的火灾和野牛干扰对鸟类的影响
摘要草原鸟类对放牧和规定的火的反应是物种特异性的,主要是在以牛为主要食草动物的系统中已知的。人们对野牛放牧如何影响草原鸟类的了解较少,特别是在从行作物农业恢复和重建的地区。在野牛重新引入和持续的规定焚烧后,我们在一个由恢复草原和残余草原组成的高草草原上,评估了总体物种丰富度和5种焦点物种(蚱蜢麻雀、Henslow’s Sparrow、Dickcissel、东部草地鹨和褐头牛鹂)的相对检测频率。2016年至2018年,我们使用固定式生物声学记录仪记录了有野牛和没有野牛地区夏季繁殖季节的音景。焦点物种的丰富度和检测频率不受野牛干扰的影响。蚱蜢麻雀和Dickcissel的检测频率对规定火灾的响应略有增加,而亨斯洛麻雀的检测频率则有所下降。地点恢复的时间是影响汉斯洛麻雀和东部草地鹨探测频率变化的主要因素,这可能是由于恢复地点与剩余地点的植被差异以及每种物种的植被结构偏好所致。棕头牛鹂的检测频率不受野牛的存在、规定的火灾或恢复后的时间的影响,但在采样年份之间有所不同。我们的焦点种在野牛重新引入后对野牛的干扰没有反应。这表明可能有一个反应的时滞,或者这些物种不会对该研究地点的野牛重新引入做出反应。
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来源期刊
American Midland Naturalist
American Midland Naturalist 环境科学-生态学
CiteScore
1.20
自引率
0.00%
发文量
38
审稿时长
18-36 weeks
期刊介绍: The American Midland Naturalist has been published for 90 years by the University of Notre Dame. The connotations of Midland and Naturalist have broadened and its geographic coverage now includes North America with occasional articles from other continents. The old image of naturalist has changed and the journal publishes what Charles Elton aptly termed "scientific natural history" including field and experimental biology. Its significance and breadth of coverage are evident in that the American Midland Naturalist is among the most frequently cited journals in publications on ecology, mammalogy, herpetology, ornithology, ichthyology, parasitology, aquatic and invertebrate biology and other biological disciplines.
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