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首页> 外文期刊>The condor >Neotropical Winter Habitat of the Magnolia War bler : Effects on Molt , Ener getic Condition , Migration Timin g, and Hemato zoan Infection Durin g Sprin g Migration
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Neotropical Winter Habitat of the Magnolia War bler : Effects on Molt , Ener getic Condition , Migration Timin g, and Hemato zoan Infection Durin g Sprin g Migration

机译：木兰战争新人的冬季栖息地：对蜕皮，能量条件，迁移时间和虫牙感染的影响。

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Events in one season can have carryover effects on birds in a subsequent season. Little research has addressed how conditions where a bird winters influence it during migration. We investigated such carryover effects on Magnolia Warblers (Dendroica magnolia) captured during spring migration in northwestern Ohio. We examined signatures of stable carbon isotopes (δ13C) in feathers grown in the neotropics where the birds winter and hypothesized that drier habitats (as indicated by δ13C) would advance infection by avian hematozoa, delay migration, and depress energetic condition and extent of prealternate molt. The range of δ13C in feathers (25.0‰ to 19.9‰) was similar to that published for tissues grown in winter by other nearctic–neotropical migrant songbirds, suggesting that the Magnolia Warblers we captured wintered over a range of xeric to mesic habitats. Nonetheless, we detected no significant relationships between habitat moisture (as indicated by δ13C in feathers) and spring migration timing (capture date), energetic condition at capture, number of molted wing coverts, or extent of black breast streaking in these Magnolia Warblers. Furthermore, we found no consistent relationships between δ13C in feathers and rates of hematozoan infection. Our data suggest that for the Magnolia Warbler, habitat moisture may not be the primary factor affecting the quality of the winter habitat or that in this species there may be no carryover effects in spring migration.
机译：一个季节中发生的事件可能会影响下一季节中的鸟类。很少有研究探讨鸟类在迁徙期间越冬的条件如何影响它。我们调查了对俄亥俄州西北部春季迁徙期间捕获的木兰莺（Dendroica magnolia）的这种残留效应。我们检查了新热带地区生长的羽毛中稳定的碳同位素（δ13C）的特征，那里的鸟类过冬，并假设较干燥的栖息地（如δ13C所示）会促进禽类血吸虫感染，延迟迁移，并降低高能状态和前代蜕皮的程度。 。羽毛中δ13C的范围（25.0‰至19.9‰）与其他近洋-新移民移徙鸣禽在冬季生长的组织所公布的范围相似，这表明我们捕获的木兰莺在一定范围的干性至中性生境中越冬。但是，在这些木兰莺中，我们并未发现栖息地的水分（如羽毛中的δ13C所示）与春季迁徙时机（捕捉日期），捕捉时的活力状况，机翼蜕皮的数目或黑色胸纹的程度之间没有显着的关系。此外，我们发现羽毛中的δ13C与造血动物感染率之间没有一致的关系。我们的数据表明，对于木兰莺来说，栖息地的水分可能不是影响冬季栖息地质量的主要因素，或者在该物种中春季迁移可能没有残留影响。

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