...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Forest Ecology and Management >Three-toed Woodpecker cavities in trees: A keystone structural feature in forests shows decadal persistence but only short-term benefit for secondary cavity-breeders
【24h】

Three-toed Woodpecker cavities in trees: A keystone structural feature in forests shows decadal persistence but only short-term benefit for secondary cavity-breeders

机译：树木中的三趾啄木鸟腔：森林中的梯形结构特征显示截止型持续性，但仅限次腔育种者的短期效益

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Primary cavity-producers like woodpeckers are often considered as keystone species, because they produce nest sites also for several other cavity-nesting animals and, thus, maintain ecological webs of cavity-breeders. However, the detailed temporal dynamics of cavities and their lifetime occupancy rates and survival are not usually known which makes it difficult to assess the actual significance and full impact of primary cavity breeders. In this study, we monitored cavities in a large forest landscape, covering the full lifetime of cavities. We focused on a mature and old-growth forest specialist cavity-breeder, the Three-toed Woodpecker Picoides tri-dactylus. The data include the annual occupancy history of 655 old cavities of the Three-toed Woodpecker in 86 territories in a 170-km(2) area in southern Finland during 1987-2017. The study area included both managed and natural forest types. The median survival time of a cavity was 10 years, but there were significant differences between forest area types with a range of 7-13 years. The occupancy in all cavities was 21.3%, and the cavities were available for secondary cavity-breeders each year. There was a significant negative correlation between the occupancy and the age of the cavity. The first five years of a cavity were important for the total occupancy, and 86% of occupancies took place before the median age of the cavities. In cavities older than 15 years the occupancy was only 7%. The pattern was similar in all types of forests. Our results show that cavities made by Three toed Woodpeckers have rather long lifespan but also that their active use by other cavity-breeding species is restricted mostly to few years only. The result indicates that new, fresh cavities are needed continuously in a forest landscape, in order to maintain the role that Three-toed Woodpecker has as a keystone species.
机译：像啄木鸟一样的主要腔生产家通常被认为是梯形物种，因为它们也为几个其他腔嵌套动物产生了巢穴，因此保持了腔育饮料的生态纤维网。然而，通常已知腔的详细时间动态及其寿命占用率和生存率，这使得难以评估原发性腔育种者的实际意义和完全影响。在这项研究中，我们在大型森林景观中监控腔，覆盖了空腔的全部寿命。我们专注于成熟和旧的森林专家腔饲养员，这是三趾啄木鸟Picoides Tri-Dactylus。该数据包括1987 - 2017年南芬兰南部的170公里（2）区的86个地区的355岁的三趾啄木鸟的年度入住历史。该研究区域包括管理和天然林类型。腔的中位生存时间为10年，但森林面积类型之间存在显着差异，范围为7-13岁。所有腔中的入住率为21.3％，腔腔可用于每年可用于二次腔育。穴位与腔的年龄之间存在显着的负相关性。前五年的腔体对于总占用率很重要，86％的占用前的洞穴在洞中中位数。在15年龄超过15年的腔内，入住率仅为7％。这些模式在所有类型的森林中都是相似的。我们的研究结果表明，三个啄木鸟制造的腔体具有相当长的寿命，而且其其他腔繁殖物种的积极用途仅限于几年。结果表明，在森林景观中连续需要新的新鲜空腔，以保持三趾啄木鸟具有梯形物种的作用。

著录项

相似文献

  • 外文文献
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