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首页> 外文期刊>Polar biology >The persistence of the snow petrel {Pagodroma nivea) in Dronning Maud Land (Antarctica) for over 37,000 years
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The persistence of the snow petrel {Pagodroma nivea) in Dronning Maud Land (Antarctica) for over 37,000 years

机译：雪海{（Pagodroma nivea）在Dronning Maud Land（南极洲）的持续生存时间超过37,000年

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摘要

Two samples of snow petrel Pagodroma nivea mumiyo (solidified stomach oil) from Heimefrontfjella (74°34'36"S, 11°13'24"W) in Dronning Maud Land, Antarctica, were radiocarbon dated at 37,400 ± 1,500 and 3,120 ± 70 years old (dates are corrected for the 'reservoir effect'). The age of the older sample provides further evidence that snow petrel colonies have existed in the mountain peaks of Dronning Maud Land since before the last glacial maximum (approx. 20,000-16,000 years ago). This finding also pushes back the estimated timing of establishment of snow petrel breeding colonies in this part of the continent by several thousand years. The variation in the accumulation rates of these two samples (1.6 and 35.2 mm per millennium, respectively) supports previous observations that mumiyo accumulation rates are highly variable and probably relate to site-specific factors affecting accumulation and degradation of the oil. Studies that help us understand historical bird population distributions in continental Antarctica can significantly aid the development and refinement of models that explain glacial advancement and retreat, the relationship between sea ice and population viability and, perhaps, predict species responses to future climate shifts.
机译：来自南极州德龙宁莫德的Heimefrontfjella（74°34'36“ S，11°13'24” W）的雪海燕Pagodroma nivea mumiyo（凝固胃油）的两个样品分别为37,400±1,500和3,120±70的放射性碳岁（针对“储层效应”更正了日期）。年龄更大的样本的年龄进一步证明了自最后一次冰川最大爆发（大约20,000-16,000年前）以来，Dronning Maud Land的山峰中就存在雪海带菌落。这一发现也将在非洲大陆这一地区建立海燕繁殖地的估计时间推迟了几千年。这两个样品的累积速率的变化（每千毫米分别为1.6和35.2毫米）支持先前的观察，即myoyo累积速率是高度可变的，并且可能与影响油的累积和降解的特定地点因素有关。有助于我们了解南极大陆鸟类历史分布的研究可以极大地帮助模型的开发和完善，这些模型可以解释冰川的前进和后退，海冰与种群生存力之间的关系，并且也许可以预测物种对未来气候变化的反应。

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