康涅狄格州森林生境中鸣禽的丰度、种类和自然条件的变化趋势

Q4 Agricultural and Biological Sciences
K. Lawlor, Yu-Huan Meng
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引用次数: 2

摘要

由于栖息地的丧失,鸣禽在康涅狄格州面临着数量的迅速下降。电力线走廊等人造栖息地是该州为数不多的理想鸣禽栖息地之一。本研究旨在确定2005年至2014年康涅狄格州四个选定森林(即诺格塔克州立森林,沙龙奥杜邦协会,迈尔斯野生动物保护区和高山森林物种多样性)中鸣禽的丰度和种类是否呈下降趋势。这项研究还使用Mann-Whitney U测试,比较了在诺格塔克州立森林电力线走廊捕获的鸣禽和在康涅狄格州西北部其他三个非破碎森林中捕获的鸣禽的身体状况。体重和翼展是鸟类身体状况的指标。结果表明,在2005 - 2014年间,三种非破碎森林的鸣禽种类呈稳步下降趋势。此外,除了迈尔斯野生动物保护区的烧鸟(Seiurus aurocapilla)和画眉鸟(Hylocichla mustelina)外,鸣禽的丰度在同一时期稳步下降。曼-惠特尼U测试的结果表明,在性别和年龄控制特征之后,三种选择性鸣禽——山雀(Catharus fuscescens)、炉鸟和画眉鸟——在诺格塔克州立森林中的身体状况往往比在三个非碎片化森林——沙龙奥杜邦协会、迈尔斯野生动物保护区和高山森林物种多样性中更好。给出了如何保护沿电力线走廊的灌木生境以及如何在非破碎森林中创造灌木生境的建议。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The changing trend in songbirds’ abundance, variety and physical condition in Connecticut’s forestry habitat
Abstract Songbirds are facing rapid population declines in Connecticut due to habitat loss. Man-made habitats such as powerline corridors are one of the few remaining ideal habitats for songbirds in the state. This study aims to determine if the abundance and variety of song-birds in four selected forests (i.e. Naugatuck State Forest, Sharon Audubon Society, Miles Wildlife Sanctuary, and Great Mountain Forest Species Variety) in Connecticut show patterns of decline from 2005 to 2014. This study also compares the physical condition of songbirds captured along a powerline corridor in the Naugatuck State Forest with those captured in the rest three non-fragmented forests in Northwestern Connecticut using Mann-Whitney U tests. Weight and wingspan are used as indicators of bird physical condition. The results demonstrate that the three non-fragmented forests experienced a steady decline in the variety of songbirds between 2005 and 2014. In addition, songbirds’ abundance decreased steadily during the same period, except that of the ovenbird (Seiurus aurocapilla) and wood thrush (Hylocichla mustelina) in Miles Wildlife Sanctuary. The results from the Mann-Whitney U test have shown that after sex- and age-controlled features, the physical conditions of the three selective songbirds – veery (Catharus fuscescens), ovenbird, and wood thrush – tend to be better in the Naugatuck State Forest than in the three non-fragmented forests – Sharon Audubon Society, Miles Wildlife Sanctuary, and Great Mountain Forest Species Variety. Given are recommendations on how to protect the shrubland habitat along powerline corridors and how to create the shrubland habitat in non-fragmented forests.
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来源期刊
Forestry Studies
Forestry Studies Agricultural and Biological Sciences-Forestry
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