Avian malaria Plasmodium relictum in native Hawaiian forest birds: epizootiology and demographic impacts on 'apapane Himatione sanguinea
Avian malaria Plasmodium relictum in native Hawaiian forest birds: epizootiology and demographic impacts on 'apapane Himatione sanguinea
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DOI：
10.1111/j.1600-048x.2009.04915.x
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发表时间：
2010-07-01
影响因子：
1.7
通讯作者：
Samuel, Michael D.
中科院分区：
文献类型：
--
作者：
Atkinson, Carter T.;Samuel, Michael D.
引入的禽疟疟原虫（Plasmodium relictum）在夏威夷原生森林鸟类数量下降和灭绝中的作用，已成为入侵性疾病对原生种群生物多样性潜在影响的一个经典例子。然而，描述禽疟疾对夏威夷特有森林鸟类适应性影响的经验证据有限，因此很难确定疾病在影响这种受威胁鸟类的分布和丰度的一系列潜在限制因素中的重要性。我们将流行病学感染力与多状态捕获-再捕获模型相结合，对‘apapane ’禽疟疾的7年纵向研究进行了评估，'apapane是夏威夷中高海拔森林中相对常见的原生蜜雀。我们发现疟疾传播在这片中高海拔森林中是季节性的；传播在秋季达到高峰，在某些年份产生了动物流行病死亡事件。在动物流行病期间，估计孵化年鸟类的年死亡率通常超过50%，成年鸟类的死亡率超过25%。禽疟疾对这种相对常见的本地物种的重大影响表明，这种疾病在夏威夷森林鸟类的减少和灭绝中发挥了关键作用。
The role of introduced avian malaria Plasmodium relictum in the decline and extinction of native Hawaiian forest birds has become a classic example of the potential effect of invasive diseases on biological diversity of naive populations. However, empirical evidence describing the impact of avian malaria on fitness of Hawai'i's endemic forest birds is limited, making it difficult to determine the importance of disease among the suite of potential limiting factors affecting the distribution and abundance of this threatened avifauna. We combined epidemiological force-of-infection with multistate capture--recapture models to evaluate a 7-year longitudinal study of avian malaria in 'apapane, a relatively common native honeycreeper within mid-elevation Hawaiian forests. We found that malaria transmission was seasonal in this mid-elevation forest; transmission peaked during fall and during some years produced epizootic mortality events. Estimated annual mortality of hatch-year birds typically exceeded 50% and mortality of adults exceeded 25% during epizootics. The substantial impact of avian malaria on this relatively common native species demonstrates the key role this disease has played in the decline and extinction of Hawaiian forest birds.