• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Nesting and feeding ecology of grassland birds in mixed-grass prairie managed with patch-burn techniques.
【24h】

Nesting and feeding ecology of grassland birds in mixed-grass prairie managed with patch-burn techniques.

机译：利用斑块烧伤技术管理混合草草原中草原鸟类的筑巢和觅食生态。

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

Scope and Method of Study. In 2006--2008, we applied patch-burn management techniques to a sandsage (Artemisia filifolia) mixed-grass prairie in western Oklahoma and compared the responses to traditionally managed (i.e., grazed only) pastures. We subsequently examined avian and invertebrate densities among patches of varying time since burn and level of grazing intensity. For Cassin's sparrow (Aimophila cassinii), field sparrow (Spizella pusilla), and lark sparrow (Chondestes grammacus), we conducted an intensive examination of their interactions with invertebrates including diet, foraging behavior, and stress hormone levels.;Findings and Conclusions. Over 70% of the invertebrates increased in abundance in treatments compared to traditional patches. Lark sparrow, mourning dove, and northern mockingbird responded positively to treatments. Western meadowlark and northern bobwhite responded positively to traditional management. Eastern red cedar (Juniperus virginiana) had a stronger influence on grassland obligate avian species than grassland facultative species. We documented positive, neutral, and negative responses of nest success to patch-burn management. Lark sparrows had higher nest success in patch-burn treatments, Cassin's sparrows had similar nest success between treatments, and field sparrow had higher nest success in traditionally managed pastures. Clutch size, fledgling numbers, and cowbird parasitism were similar among treatments. The invertebrate component of the diet of the three target species varied among years and was dominated by Acrididae and to a lesser extent Lepidoptera larvae, Cercopidae, and miscellaneous Coleoptera. Lark sparrow yolk corticosterone (CORT) varied among treatments, and was generally higher in traditional patches. CORT levels were best explained by variability of invertebrate biomass, year, and egg age. Inverebrate crude protein varied among orders; Orthoptera and Araneae had the highest protein levels. Protein levels in Acrididae, Tettigonidae, Coleoptera, and Homoptera varied by time since burn but were higher in older patches. We conclude that heterogeneity-based management can be used to positively benefit grassland birds and invertebrates.
机译：研究范围和方法。在2006--2008年，我们将修补程序烧伤管理技术应用于俄克拉荷马州西部的沙鼠草（Artemisia filifolia）混合草草原，并比较了对传统管理（即仅放牧）牧场的反应。随后，我们检查了自烧伤以来不同时间的斑块中的鸟类和无脊椎动物密度以及放牧强度。对于卡辛麻雀（Aimophila cassinii），野麻雀（Spizella pusilla）和云雀麻雀（Chondestes grammacus），我们对它们与无脊椎动物的相互作用进行了深入研究，包括饮食，觅食行为和应激激素水平。调查结果和结论。与传统贴片相比，超过70％的无脊椎动物在治疗上的数量增加了。云雀麻雀，哀鸽和北部知更鸟对治疗反应良好。西部的草地and和北部的鲍勃怀特对传统管理方式作出了积极反应。东部红柏（Juniperus virginiana）对草原专性鸟类的影响要大于草原兼性物种。我们记录了巢穴成功对补丁程序刻录管理的正面，中性和负面反应。云雀麻雀在贴片烧伤处理中的筑巢成功率更高，卡辛麻雀在两次处理之间具有相似的筑巢成功率，而野麻雀在传统管理的牧场中具有较高的筑巢成功率。离合器的大小，羽翼未丰的数量和牛寄生虫之间的关系相似。三种目标物种的饮食中无脊椎动物成分随年份而变化，并以Ac科（Arididae）和鳞翅目幼虫，Cercopidae和其他鞘翅目为少。云雀麻雀卵黄皮质酮（CORT）因治疗而异，通常在传统斑块中较高。用无脊椎动物生物量，年份和卵龄的可变性可以最好地解释CORT水平。无脊椎动物的粗蛋白随订单而变化。直翅目和蜘蛛科的蛋白质含量最高。自烧伤以来，Ac科，T科，鞘翅目和同翅目中的蛋白质水平随时间而变化，但在较老的斑块中较高。我们得出的结论是，基于异质性的管理可用于使鸟类和无脊椎动物的草原受益。

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