...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine biology >Leatherback turtles as oceanographic indicators: stable isotope analyses reveal a trophic dichotomy between ocean basins
【24h】

Leatherback turtles as oceanographic indicators: stable isotope analyses reveal a trophic dichotomy between ocean basins

机译：棱皮海龟作为海洋学指标：稳定的同位素分析揭示了海盆之间的营养二分法

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

Oceanographic sampling is often limited to local and temporally concise assessments of complex, transient, and widespread phenomena. However, long-lived, migratory pelagic vertebrates such as leatherback turtles (Dermochelys coriacea, Vandelli 1761) can provide important integrated information about broad-scale oceanographic processes. Therefore, the present study analyzed stable carbon and nitrogen isotope ratios (δ~(13)C and δ~(15)N) of egg yolk and red blood cells from nesting leatherback populations from Costa Rica in the eastern Pacific in 2003-2004 and 2004-2005 and from St. Croix in the North Atlantic in 2004 and 2005 to establish differences between nutrient sourcing and its influence on higher trophic level consumers in both ocean basins. Whereas δ~(13)C signatures were similar between Costa Rica (-19.1 ±0.7per thousand ) and St. Croix (-19.4 ± 1.0per thousand) leather-backs, reflecting the pelagic foraging strategy of the species, Costa Rica leatherback δ~(15)N signatures (15.4 ± 1.8per thousand) were significantly enriched relative to St. Croix leatherback δ~(15)N signatures (9.8±1.5per thousand). This (δ~(15)N difference likely reflects inter-basin differences in nitrogen cycling regimes and their influence on primary productivity being transferred through several trophic levels. Thus, high-order marine consumer movements, habitat preferences, and stable isotope signatures can be combined with ocean sampling to elucidate interactions between oceanographic processes and marine megafauna.
机译：海洋采样通常仅限于对复杂，短暂和广泛现象的局部和时间简洁评估。但是，长寿命，迁徙的远洋脊椎动物，如棱皮龟（Dermochelys coriacea，Vandelli 1761）可以提供有关大规模海洋学过程的重要综合信息。因此，本研究分析了2003-2004年间东太平洋哥斯达黎加的筑巢棱皮背种群的蛋黄和红细胞的稳定碳氮同位素比（δ〜（13）C和δ〜（15）N）。 2004-2005年，以及2004年和2005年在北大西洋的圣克鲁斯建立，以确定养分来源及其对两个海盆较高营养级别的消费者的影响之间的差异。哥斯达黎加（-19.1±0.7 /千）和圣克鲁瓦（-19.4±1.0 /千）皮革背的δ〜（13）C特征相似，反映了该物种的中上层觅食策略哥斯达黎加棱皮δ相对于圣克鲁斯棱皮的δ〜（15）N签名（9.8±1.5 /千），〜（15）N签名（15.4±1.8 /千）显着富集。 （δ〜（15）N的差异可能反映了氮循环系统中流域间的差异及其对初级生产力的影响通过多个营养级转移，因此，高阶海洋消费者运动，栖息地偏好和稳定的同位素特征可以成为结合海洋采样来阐明海洋学过程与海洋大型动物之间的相互作用。

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