...
首页> 外文期刊>Alabama s Treasured Forests >American Bvlack Bear - where are They in Alabama?
【24h】

American Bvlack Bear - where are They in Alabama?

机译:美国黑熊-他们在阿拉巴马州的哪里?

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       

摘要

American black bear (Ursusamericanus) was once abundant throughout NorthAmerica. Populations wereonce believed to exceed over two millionanimals. Recent populations have sincebeen reduced to an estimate of approximately 600,000-700,000 animals. Thedrop in numbers was primarily accreditedto habitat loss through extensive landclearing for agricultural use. Other factors leading to the decline were humandisturbance and illegal kills. However,today's bear population is showing anupward swing in numbers.
机译:美国黑熊(Ursusamericanus)曾经在整个北美盛产。人们曾经认为种群超过了200万动物。此后,最近的种群已减少到大约600,000-700,000只。数量下降主要是由于为农业使用的广泛土地开垦而造成的生境丧失。导致下降的其他因素是人为干扰和非法杀戮。但是,今天的熊种群数量呈上升趋势。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号