...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Wildlife Management >Effects of haying on breeding birds in CRP grasslands
【24h】

Effects of haying on breeding birds in CRP grasslands

机译：干草对CRP草原鸟类繁殖的影响。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Conservation Reserve Program (CRP) is a voluntary program that is available to agricultural producers to help protect environmentally sensitive or highly erodible land. Management disturbances of CRP grasslands generally are not allowed unless authorized to provide relief to livestock producers during severe drought or a similar natural disaster (i.e., emergency haying and grazing) or to improve the quality and performance of the CRP cover (i.e., managed haying and grazing). Although CRP grasslands may not be hayed or grazed during the primary bird-nesting season, these disturbances may have short-term (1yr after disturbance) and long-term (2yr after disturbance) effects on grassland bird populations. We assessed the effects of haying on 20 grassland bird species in 483 CRP grasslands in 9 counties of 4 states in the northern Great Plains, USA between 1993 and 2008. We compared breeding bird densities (as determined by total-area counts) in idle and hayed fields to evaluate changes 1, 2, 3, and 4 years after haying. Haying of CRP grasslands had either positive or negative effects on grassland birds, depending on the species, the county, and the number of years after the initial disturbance. Some species (e.g., horned lark [Eremophila alpestris], bobolink [Dolichonyx oryzivorus]) responded positively after haying, and others (e.g., song sparrow [Melospiza melodia]) responded negatively. The responses of some species changed direction as the fields recovered from haying. For example, densities for common yellowthroat (Geothlypis trichas), sedge wren (Cistothorus platensis), and clay-colored sparrow (Spizella pallida) declined the first year after haying but increased in the subsequent 3 years. Ten species showed treatmentxcounty interactions, indicating that the effects of haying varied geographically. This long-term evaluation on the effects of haying on breeding birds provides important information on the strength and direction of changes in bird populations following a disturbance. Results from this study can help guide management of CRP and other grasslands and inform future agricultural programs that address biomass energy production. (c) 2016 This article is a U.S. Government work and is in the public domain in the USA.
机译：保护储备计划（CRP）是一项自愿计划，可供农业生产者使用，以帮助保护对环境敏感或易侵蚀的土地。通常不允许对CRP草原进行管理干扰，除非获得授权以在严重干旱或类似的自然灾害（例如紧急干草和放牧）中为牲畜生产者提供救济，或者提高CRP覆盖物的质量和性能（例如，管理干草和放牧）。尽管在初级鸟类筑巢季节可能不会干草或放牧CRP草原，但这些干扰可能对草原鸟类种群产生短期（干扰后1年）和长期（干扰后2年）影响。在1993年至2008年之间，我们评估了干草对美国大平原北部4个州的9个县的483个CRP草原中20种草原鸟类的影响。我们比较了闲置和闲置条件下繁殖鸟类的密度（由总面积计数确定）在干草后1、2、3和4年使用干草堆评估变化。 CRP草原的干草对草原鸟类具有正面或负面影响，具体取决于物种，县和初始干扰后的年数。一些物种（例如，有角的百灵[Eremophila alpestris]，bobolink [Dolichonyx oryzivorus]）在干草后呈阳性反应，而其他物种（例如，麻雀[Melospiza melodia]）则呈阴性反应。随着干草的恢复，一些物种的反应改变了方向。例如，普通黄喉（Geothlypis trichas），草（Cistothorus platensis）和黏土色麻雀（Spizella pallida）的密度在干草后的第一年下降，但在随后的三年中上升。十个物种表现出处理×县相互作用，表明干草的影响在地理上是不同的。这项关于干草对家禽的影响的长期评估提供了有关干扰后家禽种群变化的强度和方向的重要信息。这项研究的结果可以帮助指导CRP和其他草原的管理，并为解决生物质能源生产的未来农业计划提供信息。 （c）2016本文是美国政府的工作，在美国属于公共领域。

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