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首页> 外文学位 >Diet-tissue stable isotope (delta13C and delta 15N) discrimination factors for multiple tissues from terrestrial reptiles (rock iguanas, Cyclura species).
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Diet-tissue stable isotope (delta13C and delta 15N) discrimination factors for multiple tissues from terrestrial reptiles (rock iguanas, Cyclura species).

机译：饮食组织稳定同位素（δ13C和δ15N）对陆生爬行动物（岩鬣蜥，Cyclura种）的多个组织的鉴别因素。

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摘要

Trophic interactions can drive community structure; therefore, studying food webs is key in understanding ecological communities. Stable isotope analysis is a powerful tool for reconstructing foraging patterns. However, stable isotope discrimination factors (Delta13C and Delta15N) are needed to best use this tool.;We determined the first Delta13C and Delta 15C values for Rock Iguanas (Cyclura spp.) to better understand isotope fractionation patterns in reptiles and estimate wild reptile diets. We analyzed Delta13C and Delta15C values between skin, blood, and scat from juvenile and adult iguanas held for over a year on a known diet and their food. We determined relationships between size/age and discrimination factors and compared isotope values from lipid- and non-lipid-extracted tissues and from scats that were treated/untreated with HCl. The Delta13C and Delta15C values ranged from -2.9 to +6.2‰ and from +1.7 to +7.0‰, respectively, with some differences among tissues and between juveniles and adults. The Delta 13C values from blood and skin differed among species, but not Delta 15C values. The Delta13C values from blood and skin and Delta15C values from blood were positively correlated with size/age. The Delta13C values from scat were negatively correlated with size (not age). Treatment with HCl (scat) and lipid extraction (skin) did not affect isotope values.;Our results aid in the understanding of processes driving stable carbon and nitrogen isotope discrimination factors in reptiles. We provided estimates of Delta13C and Delta15C values and linear relationships between iguana size/age and discrimination factors for the best application of these values for interpreting wild reptile foraging ecology.
机译：营养相互作用可以驱动社区结构。因此，研究食物网是了解生态群落的关键。稳定的同位素分析是用于重建觅食模式的强大工具。但是，需要稳定的同位素判别因子（Delta13C和Delta15N）才能最好地使用此工具。 。我们分析了在已知饮食和食物下保存一年以上的幼年和成年鬣蜥的皮肤，血液和粪便之间的Delta13C和Delta15C值。我们确定了大小/年龄与区分因素之间的关系，并比较了脂质和非脂质提取组织以及经过HCl处理/未处理的粪便中的同位素值。 Delta13C和Delta15C值的范围分别为-2.9至+ 6.2‰和+1.7至+ 7.0‰，各组织之间以及青少年与成年人之间存在一些差异。血液和皮肤的Delta 13C值在物种之间有所不同，但Delta 15C值没有差异。血液和皮肤的Delta13C值以及血液的Delta15C值与大小/年龄呈正相关。粪便中的Delta13C值与大小（而不是年龄）呈负相关。用HCl（粪便）和脂质提取物（皮肤）进行处理不会影响同位素值。；我们的结果有助于理解驱动爬行动物中稳定的碳和氮同位素识别因子的过程。我们提供了Delta13C和Delta15C值的估计值，以及鬣蜥大小/年龄和歧视因素之间的线性关系，以最好地利用这些值来解释野生爬行动物觅食生态。

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  • 作者

    Steinitz, Ronnie.;

  • 作者单位

    University of California, San Diego.;

  • 授予单位 University of California, San Diego.;
  • 学科 Ecology.;Biogeochemistry.;Behavioral sciences.
  • 学位 M.S.
  • 年度 2015
  • 页码 55 p.
  • 总页数 55
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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