• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Proceedings of the National Academy of Sciences of the United States of America >PNAS Plus: Long-term declines in bird populations in tropical agricultural countryside
【2h】

PNAS Plus: Long-term declines in bird populations in tropical agricultural countryside

机译：PNAS Plus：热带农业农村地区的鸟类种群长期减少

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Tropical agriculture is a major driver of biodiversity loss, yet it can provide conservation opportunities, especially where protected areas are inadequate. To investigate the long-term biodiversity capacity of agricultural countryside, we quantified bird population trends in Costa Rica by mist netting 57,255 birds of 265 species between 1999 and 2010 in sun coffee plantations, riparian corridors, secondary forests, forest fragments, and primary forest reserves. More bird populations (69) were declining than were stable (39) or increasing (4). Declines were common in resident, insectivorous, and more specialized species. There was no relationship between the species richness of a habitat and its conservation value. High-value forest bird communities were characterized by their distinct species composition and habitat and dietary functional signatures. While 49% of bird species preferred forest to coffee, 39% preferred coffee to forest and 12% used both habitats, indicating that coffee plantations have some conservation value. Coffee plantations, although lacking most of the forest specialists, hosted 185 bird species, had the highest capture rates, and supported increasing numbers of some forest species. Coffee plantations with higher tree cover (7% vs. 13%) had more species with increasing capture rates, twice as many forest specialists, and half as many nonforest species. Costa Rican countryside habitats, especially those with greater tree cover, host many bird species and are critical for connecting bird populations in forest remnants. Diversified agricultural landscapes can enhance the biodiversity capacity of tropical countryside, but, for the long-term persistence of all forest bird species, large (>1,000 ha) protected areas are essential.
机译：热带农业是生物多样性丧失的主要驱动力，但它可以提供保护机会，尤其是在保护区不足的地方。为了调查农业农村的长期生物多样性能力，我们通过雾化量化了1999年至2010年之间太阳咖啡种植园，河岸走廊，次生森林，森林碎片和原始森林保护区中265种57,255种鸟类的哥斯达黎加鸟类数量趋势。与稳定（39）或增加（4）相比，减少的鸟类数量更多（69）。在常住的，食虫的和更专业的物种中下降是普遍的。栖息地的物种丰富度与其保护价值之间没有关系。高价值的森林鸟类群落的特征在于其独特的物种组成，栖息地和饮食功能特征。虽然49％的鸟类比森林更喜欢森林，但39％的森林比森林更喜欢咖啡，12％的人同时使用了这两种栖息地，这表明咖啡种植园具有一定的保护价值。咖啡种植园虽然缺乏大多数森林专家，却拥有185种鸟类，捕获率最高，并支持某些森林物种数量的增加。树木覆盖率较高的咖啡种植园（分别为7％和13％）具有更多的种类，捕获率提高了，森林专家的数量增加了一倍，非森林种类的数量增加了一半。哥斯达黎加的乡村生境，尤其是树木遮盖力强的乡村生境，拥有许多鸟类，对于连接森林残留物中的鸟类种群至关重要。多样化的农业景观可以提高热带乡村的生物多样性能力，但是，对于所有林鸟物种的长期存续而言，大型（> 1,000公顷）保护区至关重要。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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