摘要
We identified 162 roosts for 36 male Indiana bats (Myotis sodalis) across 3 study areas in the Ozarks of northern Arkansas, USA, during the autumn swarm (late Aug to late Oct, 2005 and 2006). Bats utilized 14 tree species; snags of shortleaf pine (Pinus echinata) were the most utilized (30% of roosts) and pines were selected over hardwoods. Diameter of trees and snags used for roosting ranged from 7.8 cm to 68.6 cm diameter at breast height (dbh), but bats used trees ≥20 cm dbh at a greater proportion than their availability. Roosts were located in a number of different forested cover classes, including shelterwood and group selection stands that had undergone partial harvesting. Roosts in 2 of 3 study areas showed no differences in proportional use of forest cover classes versus availability of those classes. However, in one study area, mature forests (≥50 yr old) that had been burned once recently and stands burned multiple times over the past 10 years were used at a greater proportion than their availability, whereas mature forests that were not burned were used at a lower proportion than their availability. An examination of stand age data indicated that 98% of all roosts were located in stands ≥38 years old, suggesting that this is an important age threshold for roost selection in the Ozark Mountains. Bats in 2 study areas roosted at lower slopes in the higher elevation portions of the study areas, whereas no selection for topographic aspect were observed in all 3 study areas. Our data indicate that perceived habitat selection by a species may differ within the same geographic region and these differences could be due to factors such as differing selection among individuals, differences in juxtaposition of landscape components and cover types, and differing biological components such as the distribution of predators and predator densities. Published 2016. This article is a U.S. Government work and is in the public domain in the USA.
摘要译文
我们确定了162栖息的36只雄性蝙蝠印第安纳（鼠耳蝠sodalis）横跨在北阿肯色，美国的奥沙克3研究区秋群中（八月下旬至10月下旬，2005年和2006年）蝙蝠利用14树种; shortleaf松（萌芽松）的断枝是所利用的最多（30％栖息的25），并选定了硬木松的用于栖息的树木和断枝直径7塩米到68塩米直径范围胸径（胸径），但蝙蝠比其可用性更大比例用于树木铌€塩米胸径栖息分别位于多个不同的森林覆盖类别，包括伞和组选看台已经经历部分收获在3研究区2栖息显示，与那些classesHowever可用性比例使用森林覆盖类没有差异，在一个研究领域，成熟森林（≥50岁老）已被烧毁最近一次和看台在过去10年中烧毁多次在比其可用性更大比例被使用，而成熟的森林不被烧毁比其可用性较低的比例被用于林分年龄数据的检查表明，所有栖息的98％，25个位于看台铌岁，这表明这是在奥索卡山脉称雄选择的重要年龄界限2研究区蝙蝠栖在该研究领域的高海拔部分较低的山坡，而在所有3个研究区域没有观察到选择地形方面我们的数据表明，由一物种感知栖息地选择可以在同一地理区域内由于因素不同，这些差异可能是例如不同的个体之间的选择，如捕食者与被捕食者分布在景观要素和覆盖类型，和不同的生物成分的并列差异densitiesPublished 2016年这篇文章是U窼政府的工作，是在美国的公共领域
Roger W. Perry[1,*]; Stephen C. Brandebura[2] and Thomas S. Risch[3];. Selection of tree roosts by male Indiana bats during the autumn swarm in the Ozark Highlands, USA[J]. Wildlife Society Bulletin, 2016,40(1): 78-87