Sulphur isotopes in animal hair track distance to sea.
Sulphur isotopes in animal hair track distance to sea.
复制标题
动物毛发中的硫同位素追踪到海洋的距离。
DOI：
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发表时间：
2011
影响因子：
2
通讯作者：
Olaf Schmidt
中科院分区：
文献类型：
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作者：
Antoine Zazzo;F. Monahan;A. Moloney;S. Green;Olaf Schmidt
动物组织中的稳定硫同位素比率（(34)S/(32)S）被建议作为陆地动物沿海居住的示踪剂，但缺乏量化硫沿海信号内陆范围和季节性影响的数据。在这里，我们展示了爱尔兰八个农场季节性采集的羊毛以及沿西海岸和东海岸随机采集的羊毛样本的 δ(34)S 测量值。我们观察到全岛 δ(34)S 存在较大 (>10‰) 差异，并且表明羊毛 δ(34)S 值与距西海岸的距离呈负相关。我们认为这是由于主要的（西南）西风气流造成的，可能还加上从东部沉积的人为硫的影响。虽然西海岸羊毛中所含的硫基本上都来自海洋，但在内陆 100 公里以上的地方仍然测量到相对较高的 δ(34)S 值，这表明海洋硫可以长距离携带。对于久坐的食草动物来说，个体水平的季节变化很小。我们得出的结论是，在档案角质组织中测量的硫同位素比率可用于描述主要由距海岸的距离定义的区域 δ(34)S 等景观，从而提供一种工具来检测此类等景观中家养、野生和野生动物的短期运动。
Stable sulphur isotope ratios ((34)S/(32)S) in animal tissues have been suggested as a tracer of coastal residency of terrestrial animals, but data are lacking that quantify the inland range of the sulphur coastal signal and the effects of seasonality. Here, we present δ(34)S measurements of sheep wool collected seasonally on eight farms across Ireland and wool samples collected opportunistically along the west and east coasts. We observed large (>10‰) δ(34)S differences across the island and we show that wool δ(34)S values were negatively correlated with distance to the west coast. We propose that this is due to the predominantly (south-)westerly airflow, possibly combined with the influence of anthropogenic sulphur deposited from the east. While essentially all the sulphur contained in west-coast wool is of marine origin, relatively high δ(34)S values were still measured >100 km inland, suggesting that marine sulphur can be carried over long distances. Seasonal variations are small at the individual level for sedentary grazing animals. We conclude that sulphur isotopes ratios measured in archival keratinous tissues can be used to describe regional δ(34)S isoscapes primarily defined by distance to coasts and thus provide a tool to detect short-term movements of domestic, feral and wild animals within such isoscapes.