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首页> 外文期刊>Canadian Journal of Zoology >Geographic variation in the isotopic (deltaD, delta13~C, delta~15N, delta34~S) composition of feathers and claws from lesser scaup and northern pintail: implications for studies of migratory connectivity
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Geographic variation in the isotopic (deltaD, delta13~C, delta~15N, delta34~S) composition of feathers and claws from lesser scaup and northern pintail: implications for studies of migratory connectivity

机译：小鳞片和北部长尾tail的羽毛和爪的同位素（δD，δ13〜C，δ〜15N，δ34〜S）组成的地理变化：对迁徙连通性的研究意义

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摘要

Stable hydrogen isotope (deltaD) measurements of bird feathers can reveal approximate North American latitudes where feathers were grown by linking feather 8D values to well-defined geographic patterns in deltaD values in growing-season precipitation.In waterfowl, this approach may require caution because wetlands are potentially "disconnected" from predictable isotopic patterns in precipitation waters. Stable carbon (deltaI3~C), nitrogen (deltaI5~N), and sulphur (delta34~S) isotope values of aviantissues may show geographic structure but can be complicated by land use. We analyzed claws of wintering adult northern pintails (Anas acuta L., 1758) from California and Texas, and feathers and claws of lesser scaup (Aythya affinis (Eyton, 1838)) ducklings from northwestern North America, to determine geographic variation in deltaD, delta3~C, deltaI5~N, and delta34~S values. Wintering pintails from Texas and California were distinguished with claw deltaD and delta15~N values. In scaup, feather deltaD values differed among biomes and were positively associated with latitude; geographic variation in other isotopes was less pronounced. The deltaD values in feathers and claws of individual scaup ducklings were correlated. A positive relationship between scaup feather deltaD values and deltaD values in growing-season precipitation was similar to results reported for songbirds. Thus, deltaD values in waterfowl feathers can provide new knowledge about natal origins and moulting sites.
机译：鸟类羽毛的稳定氢同位素（deltaD）测量可以通过在生长季节的降水中将羽毛8D值与deltaD值中明确定义的地理模式相关联来揭示大约在北美纬度生长的羽毛。可能与降水中可预测的同位素模式“脱节”。航空植物的稳定碳（deltaI3〜C），氮（deltaI5〜N）和硫（delta34〜S）同位素值可能显示地理结构，但可能因土地利用而复杂化。我们分析了来自加利福尼亚和得克萨斯州的成年北部长尾pin（Anas acuta L.，1758）的越冬爪，以及北美西北部的小鳞茎小鸭（Aythya affinis（Eyton，1838））小鸭的羽毛和爪，以确定delDD的地理差异， delta3〜C，deltaI5〜N和delta34〜S值。来自得克萨斯州和加利福尼亚州的越冬长尾s以爪δD和δ15〜N值来区分。在scaup中，生物群落之间的羽毛deltaD值不同，并且与纬度呈正相关。其他同位素的地理变化不太明显。个体小鸭的羽毛和爪中的deltaD值是相关的。羽冠羽deltaD值与季节生长降水中deltaD值之间的正相关与报告的鸣禽相似。因此，水禽羽毛中的deltaD值可以提供有关出生地和换羽部位的新知识。

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