• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Carry-over effects from the non-breeding season influence spring arrival dates, reproductive success, and survival in an endangered migratory bird, the Kirtland's warbler (Setophaga kirtlandii).
【24h】

Carry-over effects from the non-breeding season influence spring arrival dates, reproductive success, and survival in an endangered migratory bird, the Kirtland's warbler (Setophaga kirtlandii).

机译：非繁殖季节的残留效应会影响春季到来日期，繁殖成功以及一只濒临灭绝的候鸟科特兰的鸣鸟（Setophaga kirtlandii）的存活。

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

I used a unique model system to evaluate potential sources of population limitation in migratory birds that travel seasonally between temperate breeding grounds and tropical non-breeding grounds. The Kirtland's warbler ( Setophaga kirtlandii) is an endangered species that is well-studied during its breeding season in northern Michigan, but how winter events may carry over to affect demographic processes remains unknown. Stable-isotope analyses of birds' tissues collected upon spring arrival revealed inconsistent yearly effects of delta13C, delta15N, and deltaD signatures on arrival schedules. Males departing from more mesic winter habitats (depleted delta13C), consuming more insects (enriched delta 15N), and wintering further south (enriched deltaD) arrived earlier to temperate breeding grounds. However, these patterns were not significant across all years. Differences in delta13C and delta 15N signatures between age classes were suggestive of age-related dominance relationships in winter. Winter habitat and diet differences among males within years did not seem to have strong carry-over effects, but mean spring arrival dates were delayed following drier winters, suggesting that carry-over effects in this species may be driven more by interannual variation in rainfall. There was a strong male age by rainfall interaction, with first-time breeders responding more strongly to changes in rainfall than experienced adults. Regardless of age, drier winters and delayed arrival and nest initiation were significantly associated with fewer offspring fledged in the subsequent breeding season. Analysis of our 5-year mark-recapture dataset showed that apparent survival is also positively associated with winter rainfall in the Bahamas. Kirtland's warbler survival probabilities are relatively high within the summer and winter stationary periods, but are lower during migration. Combining my survival and productivity data into a simple projection model revealed that the population growth rate of this species may become negative if Bahamas March rainfall drops more than 18% from its current mean. Climate change models predict continued drying trends in the Caribbean, which could have negative consequences on the population dynamics of the Kirtland's warbler. These results emphasize the importance of understanding the effects of climatic variation on demographic rates, and underscore the need for continued research on the ecology of migratory animals throughout the annual cycle.
机译：我使用了一个独特的模型系统来评估候鸟的潜在种群限制源，这些候鸟在温带繁殖场和热带非繁殖场之间季节性地传播。 Kirtland的莺（Setophaga kirtlandii）是一种濒危物种，在密歇根州北部的繁殖季节进行了充分的研究，但是冬季事件如何影响人口统计过程仍是未知的。对春季到达时采集的鸟类组织的稳定同位素分析显示，到达时间表上的delta13C，delta15N和deltaD签名的年度影响不一致。雄性从较忙碌的冬季栖息地（耗尽的delta13C）出发，消耗更多的昆虫（丰富的delta 15N），越冬越南（丰富的deltaD），则较早到达温带繁殖地。但是，这些模式在所有年份中都不显着。年龄段之间的delta13C和delta 15N签名差异表明冬季存在与年龄相关的优势关系。几年内男性之间的冬季栖息地和饮食差异似乎没有很强的残留效应，但是由于干燥的冬季，春季的平均到达日期被推迟了，这表明该物种的残留效应可能更多地受到降雨年际变化的影响。降雨相互作用使雄性年龄变强，与经验丰富的成年动物相比，初次育种者对降雨变化的反应更为强烈。不论年龄大小，越干燥的冬天以及延迟到达和筑巢的开始都与在随后的繁殖季节中繁殖出的后代数量减少有关。对我们为期5年的标记回收数据集的分析表明，表观生存率还与巴哈马的冬季降雨成正比。柯尔特兰的莺生活概率在夏季和冬季的静止时期相对较高，但在迁徙期间较低。将我的生存和生产力数据结合到一个简单的预测模型中，我们发现，如果巴哈马3月的降雨量比目前的平均值下降超过18％，该物种的种群增长率可能会变为负数。气候变化模型预测加勒比海地区将继续出现干旱趋势，这可能会对柯特兰莺的种群动态产生负面影响。这些结果强调了了解气候变化对人口变化率影响的重要性，并强调了需要在整个年度周期内继续研究迁徙动物的生态。

著录项

  • 作者

    Rockwell, Sarah Mary.;

  • 作者单位

    University of Maryland, College Park.;

  • 授予单位 University of Maryland, College Park.;
  • 学科 Ecology.
  • 学位 Ph.D.
  • 年度 2013
  • 页码 124 p.
  • 总页数 124
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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