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首页> 外文期刊>The Wilson Bulletin >Density And Abundance Of Mountain Plovers In Northeastern Montana
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Density And Abundance Of Mountain Plovers In Northeastern Montana

机译:蒙大拿州东北山区的山猫密度和丰富度

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摘要

Estimates of local abundance for declining species provide important information necessary for conservation measures. We estimated the density and abundance of Mountain Plover (Charadrius montanus) in Phillips and Valley counties in north-central Montana in 2004 using distance sampling methodology. Sampling efforts were stratified to include active prairie dog (Cynomys sp.) colonies, an Area of Critical Environmental Concern (ACEC) specifically established for Mountain Plover, and all other habitats. The density of plovers was greatest on prairie dog colonies (7.20 ± 0.42 [SE] plovers/km~2) and much lower on both the ACEC (1.60 ± 0.31 plovers/km~2), and all other habitats (0.07 ± 0.01 plovers/km~2). An estimated 1,028 (95% CI = 903-1,153) plovers inhabited this region in 2004, most (74%) on prairie dog colonies. Our results highlight the importance of prairie dog colonies to plovers in this region and suggest that as much as 10% of their continental population may breed in north-central Montana.
机译:估计当地物种减少的丰度为保护措施提供了重要的信息。我们使用距离采样方法估算了2004年蒙大拿州中北部菲利普斯州和瓦利县的山and(Charadrius montanus)的密度和丰度。抽样工作被分层,包括活跃的草原犬(Cynomys sp。)殖民地,专为山区P鸟建立的关键环境关注区(ACEC),以及所有其他栖息地。在草原犬鼠种群中,over的密度最大(7.20±0.42 [SE] over / km〜2),而在ACEC(1.60±0.31 over / km〜2)和所有其他生境中则低得多(0.07±0.01 over) / km〜2)。据估计,2004年该地区栖息着1,028只(95%CI = 903-1,153)千鸟,大部分(74%)栖息在草原犬鼠种群中。我们的结果凸显了该地区草原犬鼠对to的重要性,并表明多达10%的大陆犬可能在蒙大拿州中北部繁殖。

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