...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Estuarine Coastal and Shelf Science >Tracking variations in wetland use by breeding flamingos using stable isotope signatures of feather and blood
【24h】

Tracking variations in wetland use by breeding flamingos using stable isotope signatures of feather and blood

机译：使用羽毛和血液的稳定同位素特征追踪火烈鸟，从而追踪湿地的利用变化

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

This study tracks temporal variations in the habitat use of breeding adult greater flamingos (Phoeni-copterus roseus) in the Camargue (southern France) using simultaneous sampling of δ~(15)N, δ~(13)C and δ~(34)S from feather and blood of chicks at fledging. Camargue flamingos forage in a heterogeneous complex of saltpans, permanent and temporary brackish lagoons, freshwater and euryhaline marshes to provision their chicks over a two month period. Using Bayesian mixing models with diet- and tissue-specific discrimination factors and invertebrates collected from 23 locations, we investigated whether blood and feather isotopes indicated temporal variations in habitat use relative to salinity and hydroperiod. We also tested whether fledgling body condition could be explained by the isotopic signatures of their tissues. While δ~(13)C and δ~(15)N values did not differ significantly between blood and feather, marked differences were apparent in the δ~(34)S values obtained from these tissues. Saltpans (38%) and freshwater marshes (33%) appeared to be the main habitats visited by adult birds in the early phase of parental care with use of saline wetlands increasing later in the season (54%). This habitat shift may be related to the peak of resources in saltpans and the drying up of freshwater and brackish marshes by mid-summer. Habitat shift (as expressed in individual shifts in isotope values between feather and blood) was not correlated with offspring age, and differed between individuals. A negative relationship was observed between offspring body condition and feather δ~(15)N, indicating that chicks fed from temporary flooded marshes fare better than those provisioned from permanent marshes. Foraging strategies of greater flamingos during parental care were heterogeneous, possibly tracking changes in resource availability as the season progressed and reflecting differences in the competitive ability of parent birds. Given that the Camargue saltpans face closure and the region's temporary wetlands remain threatened, our results emphasize the critical importance of conserving these two key habitats for greater flamingos. Dual tissue, triple-stable isotope analysis provides a useful and sensitive means of tracking localized environmental change in this threatened system.
机译：本研究通过同时采样δ〜（15）N，δ〜（13）C和δ〜（34）来追踪Camargue（法国南部）的成年大火烈鸟（Phoeni-copterus roseus）的栖息地利用的时间变化。小鸡出雏时的羽毛和血液中的S。 Camargue火烈鸟在不同类型的盐锅，永久和临时咸淡水泻湖，淡水和鱼腥草沼泽中觅食，以在两个月的时间内提供雏鸡。使用贝叶斯混合模型，其中包括饮食和组织特定的歧视因素以及从23个地点收集的无脊椎动物，我们调查了血液和羽毛同位素是否表明栖息地使用相对于盐度和水周期的时间变化。我们还测试了雏鸟的身体状况是否可以通过其组织的同位素特征来解释。尽管血液和羽毛之间的δ〜（13）C和δ〜（15）N值没有显着差异，但从这些组织获得的δ〜（34）S值却存在明显差异。盐田（38％）和淡水沼泽（33％）似乎是成年鸟类在父母照管初期拜访的主要栖息地，而盐雾湿地的使用在该季节后期有所增加（54％）。这种栖息地的变化可能与盐池中资源的高峰以及仲夏之前淡水和​​咸淡沼泽的干drying有关。生境变化（用羽毛和血液之间的同位素值的个体变化表示）与后代年龄无关，并且个体之间也不同。观察到后代的身体状况与羽毛δ〜（15）N之间存在负相关关系，这表明用临时淹没沼泽喂养的雏鸡的饲养性能要好于用永久沼泽喂养的雏鸡。父母照料期间大火烈鸟的觅食策略是异类的，可能随着季节的进展跟踪资源可用性的变化，并反映出亲鸟竞争能力的差异。鉴于Camargue盐盆面临封闭，并且该地区的临时湿地仍然受到威胁，我们的结果强调了保护这两个主要栖息地以增加火烈鸟的至关重要。双组织，三稳态同位素分析提供了一种有用的且灵敏的方法来跟踪此受威胁系统中的局部环境变化。

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