Determining the relationships between forage use , climate and nutritional status of barren ground caribou , Rangifer tarandus groenlandicus , on Southampton Island , Nunavut , using stable isotopes analysis of δ 13 C and δ
Determining the relationships between forage use , climate and nutritional status of barren ground caribou , Rangifer tarandus groenlandicus , on Southampton Island , Nunavut , using stable isotopes analysis of δ 13 C and δ
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使用 δ 13 C 和 δ 的稳定同位素分析确定努勒维特南安普敦岛贫瘠地面驯鹿 (Rangifer tarandus groenlandicus) 的饲料利用、气候和营养状况之间的关系
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发表时间：
2006
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通讯作者：
Ian Albert McLeman
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作者：
Ian Albert McLeman
我在此声明，我是这篇论文的唯一作者。这是我的考官认可的论文的真实副本，包括任何所需的期末修改。我知道我的论文可能会以电子方式向公众开放。利用碳(δ13 C)和氮(δ15 N)的稳定同位素分析方法对加拿大努纳武特南安普顿岛1998年至2000年和2004年至2005年的驯鹿(Rangifer Tarandus Groenlandicus)进行了研究。瘤胃内容物和肌肉样本的春季特征与背脂和莱尼肾脂肪指数的标准生物学指标相关。驯鹿δ13C和δ15N比率以及详细的瘤胃含量分析表明，SIA数据产生了反映摄食生态时空变化的时间整合信号，因此能够检测营养相互作用。瘤胃内容签名提供了当前饲料选择的指示，而肌肉组织签名反映了夏季季节性大量饲料，与瘤胃签名相结合，可以帮助确定冬季饮食的潜在变化和驯鹿状况的短期变化。主要饲草品种类别的δ13C和δ15N特征也与瘤胃内容物和肌肉特征的变化进行了比较，以研究饲料偏好的可能变化。结果表明，SIA能够评估季节性栖息地利用对季节性食物摄入量的重要性。利用稳定同位素分析(SIA)研究了冬季积雪厚度和温度对南安普顿岛北美驯鹿(Rangifer Tarandus)的影响。瘤胃内容物和肌肉的同位素特征变化表明，冬季气候条件的差异可能会影响饲料选择，并影响动物条件。我要感谢我的导师迈克尔·鲍尔博士，他在我追求这篇论文的过程中给予了我坚定不移的支持和指导。我也要感谢加拿大野生动物服务局的唐·拉塞尔为我的委员会服务，并提供了使这一论点成为现实的关键信息。感谢罗兰·霍尔博士，他在一开始就在那里，感谢韦恩·霍桑博士，他在最后在那里为我的委员会服务，感谢大卫·巴顿博士为我辩护。我还要感谢努纳武特环境部的米奇·坎贝尔启发我研究…南安普顿岛的驯鹿
I hereby declare that I am the sole author of this thesis. This is a true copy of the thesis, including any required final revisions, as accepted by my examiners. I understand that my thesis may be made electronically available to the public. Signature ii Thesis Abstract The caribou (Rangifer tarandus groenlandicus) on Southampton Island, Nunavut, Canada for the years 1998-2000 and 2004, 2005, were investigated using stable isotope analysis (SIA) of carbon (δ 13 C) and nitrogen (δ 15 N). Spring signatures of rumen contents and muscle samples were correlated with standard biological measures of back fat and Riney kidney fat index. Caribou δ 13 C and δ 15 N ratios, together with detailed rumen content analysis, show that SIA data yields a time-integrated signal reflective of spatial and temporal variation in feeding ecology and as such is capable of detecting trophic interactions. Rumen content signatures provide current indication of forage selection, while muscle tissue signatures reflect bulk summer seasonal diet and in combination with rumen signatures, can help identify potential shifts in winter diet and the potential for short-term changes in caribou condition. δ 13 C and δ 15 N signatures for major forage species categories were also compared to variations in rumen content and muscle signatures to investigate possible changes in forage preference. The results indicate that SIA is capable of assessing the importance of seasonal habitat use with regard to seasonal food intake. Stable isotopes analysis (SIA) was also used to investigate the effects of winter snow thickness and temperature on caribou (Rangifer tarandus), on Southampton Island. Variations found in isotope signatures of rumen content and muscle indicated that differences in winter climate conditions might affect forage selection, and impact on animal condition. iii Acknowledgements I would like to thank my supervisor, Dr. Michael Power, for his never-wavering support and guidance in my pursuit of this thesis. I would also like to thank Don Russell, of the Canadian Wildlife Service, for serving on my committee and providing key information allowing this thesis to materialize. Thanks to Dr. Roland Hall, who was there in the beginning, and to Dr. Wayne Hawthorn who was there at the end, serving on my committee, and for Dr. David Barton sitting in at my defense. I would also like to thank Mitch Campbell, of the Nunavut Department of the Environment (Arviat), for inspiring me to study the caribou of Southampton Island, …