Life history mediates the association between parasite abundance and geographic features
Life history mediates the association between parasite abundance and geographic features
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生活史介导寄生虫丰度与地理特征之间的关联
DOI：
10.1111/1365-2656.13693
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发表时间：
2022
影响因子：
4.8
通讯作者：
Haupt, Alison J.
中科院分区：
文献类型：
--
作者：
Williams, Maureen A.;Faiad, Sara;Claar, Danielle C.;French, Beverly;Leslie, Katie L.;Oven, Emily;Guerra, Ana Sofia;Micheli, Fiorenza;Zgliczynski, Brian J.;Haupt, Alison J.
虽然寄生虫在海洋生态系统中无处不在，但由于多种相互作用的环境梯度和压力因素的未知影响，预测海洋生态系统中存在的寄生虫丰度已被证明具有挑战性。此外，尽管寄生虫具有显著的多样性，但它们通常被认为是生态系统中的一个统一群体。我们的目标是确定珊瑚礁生态系统中寄生虫丰度的多个预测因子的潜在重要性，包括珊瑚礁面积，岛屿面积，人口密度，叶绿素a，宿主多样性，珊瑚覆盖率，宿主丰度和岛屿隔离度。使用超过1个数据库中的模型选择方法，通过对太平洋线群岛11个岛屿的200个鱼类宿主及其寄生虫的研究，发现地理梯度（包括岛屿面积和岛屿隔离度）是寄生虫丰度的最佳预测因子，生活史调节了这种关系;具有复杂生命周期的寄生虫随着岛屿隔离的增加而大量增加，而具有直接生活史的寄生虫随着隔离度的增加而减少。直接的生命周期寄生虫增加丰富的岛屿面积的增加，虽然复杂的生命周期寄生虫的丰度与岛屿area.This独特的数据集的新分析表明，寄生虫在海洋系统中的丰度不能准确预测，不占每个寄生虫的生活史和环境条件的独立和相互作用的影响。
Although parasites are ubiquitous in marine ecosystems, predicting the abundance of parasites present within marine ecosystems has proven challenging due to the unknown effects of multiple interacting environmental gradients and stressors. Furthermore, parasites often are considered as a uniform group within ecosystems despite their significant diversity.We aim to determine the potential importance of multiple predictors of parasite abundance in coral reef ecosystems, including reef area, island area, human population density, chlorophyll‐a, host diversity, coral cover, host abundance and island isolation.Using a model selection approach within a database of more than 1,200 individual fish hosts and their parasites from 11 islands within the Pacific Line Islands archipelago, we reveal that geographic gradients, including island area and island isolation, emerged as the best predictors of parasite abundance.Life history moderated the relationship; parasites with complex life cycles increased in abundance with increasing island isolation, while parasites with direct life cycles decreased with increasing isolation. Direct life cycle parasites increased in abundance with increasing island area, although complex life cycle parasite abundance was not associated with island area.This novel analysis of a unique dataset indicates that parasite abundance in marine systems cannot be predicted precisely without accounting for the independent and interactive effects of each parasite's life history and environmental conditions.