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首页> 外文期刊>Parasitology Research >Linking species abundance distributions and body size in monogenean communities.
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Linking species abundance distributions and body size in monogenean communities.

机译：将单物种群落中的物种丰度分布和体型联系起来。

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摘要

Parasite communities are characterised by one or a few numerically dominant species and many rare species. Although this pattern is well recognised, its underlying causes remain unknown. In this study, we tested whether variation in abundance among species within parasite communities can be explained by interspecific variation in body size. We used data on nine fish species (families Serranidae and Lethrinidae) from New Caledonia, each harbouring strictly host-specific diplectanid monogenean species with very uneven abundances. On each fish species, the most abundant monogenean species accounted for between one half and two thirds of all individuals recovered from the community, and its abundance was between 2 and 114 times greater than that of the second-most abundant species. However, there was no convincing evidence that the ratio of abundance values between the two most abundant species in a community co-varied with the ratio in their body sizes; thus, size differences cannot explain these differences in abundances between common species. It is surprising to note that in two of the three communities with enough species for an analysis to be performed, body size tended to correlate positively with abundance among all species of diplectanid monogeneans. Thus, although body size variation on its own cannot account for the pronounced differences in abundance among monogenean species within the same community, body size remains an important determinant of abundance as it relates to life-history traits underpinning reproductive rates and population growth in these unsaturated communities.
机译：寄生虫群落的特征是一种或几种在数量上占优势的物种和许多稀有物种。尽管已经很好地认识了这种模式，但是其根本原因仍然未知。在这项研究中，我们测试了寄生虫群落中物种之间的丰度变化是否可以通过体内大小的种间变化来解释。我们使用了来自新喀里多尼亚的9种鱼类（Serranidae和Lethrinidae家族）的数据，每种鱼类都严格含有宿主特有的二足动物单基因种，其丰度非常不均匀。在每种鱼类上，最丰富的单属物种占从该社区恢复的所有个体的一半至三分之二，其丰富度是第二丰富物种的丰富度的2至114倍。但是，没有令人信服的证据表明，一个社区中两个最丰富的物种之间的丰度值之比与它们的体型之比有共同的变化。因此，大小差异无法解释常见物种之间的丰度差异。令人惊讶地注意到，在三个群落中有两个物种足以进行分析的两个群落中，体形倾向于与二氯双生单核生物的所有物种中的丰度呈正相关。因此，尽管单靠体重的变化并不能解释同一社区内单基因物种在丰度上的明显差异，但体重仍然是丰度的重要决定因素，因为它与生活史特征有关，这些特征支撑着这些不饱和人群的生殖速度和人口增长社区。

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