Spatial and temporal structure of the trematode component community in Valvata macrostoma (Gastropoda, Prosobranchia)
Spatial and temporal structure of the trematode component community in Valvata macrostoma (Gastropoda, Prosobranchia)
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DOI：
10.1017/s0031182008005027
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发表时间：
2008-12-01
期刊：
影响因子：
2.4
通讯作者：
Karvonen, A.
中科院分区：
文献类型：
--
作者：
Faltynkova, A.;Valtonen, E. T.;Karvonen, A.
首次对大口壳螺体内吸虫群落的时空结构进行了全面的研究。2007年5月至10月，从芬兰中部芬兰中部的浅水区（1-2米深）和近海区（5-6米深）每月共检查1103只蜗牛。相隔50-70米。感染钉螺的吸虫有10种。物种组成和患病率显着不同的网站之间的物种多样性高，在较浅的网站（所有10种;总患病率孢子囊/resistance 12.1%，囊蚴55.4%）相比，较深的网站（3种;患病率分别为15.0%和1.9%）。这种差异在我们的研究中一直存在，可能与鸟类最终宿主的空间分布有关，而季节性寄生虫动态可能会受到蜗牛种群年龄结构变化的影响。孢子囊感染的可能性增加与蜗牛的大小，但没有观察到这样的趋势，在radial或囊蚴感染，减少与主机大小。我们的研究结果表明，一般良好的描述的时空差异吸虫感染的软体动物可以出现在非常狭窄的空间和时间尺度，这强调了这些因素在社区研究的重要性。
We conducted the first comprehensive study on the spatiotemporal structure of trematode communities in the large-mouthed valve snail, Valvata macrostoma. A total of 1103 snails were examined monthly between May and October 2007 from Lake Konnevesi, Central Finland, from a shallow (1-2 m deep) and an offshore site (5-6 m deep), located ca. 50-70 m apart. Snails were infected by 10 trematode species. The species composition and prevalence were strikingly different between the sites with high species diversity in the shallow site (all 10 species; total prevalence of sporocysts/rediae 12.1%, metacercariae 55.4%) compared to the deeper site (3 species; prevalence 15.0% and 1.9%, respectively). This difference persisted throughout Our Study and is probably related to the spatial distribution of bird definitive hosts, whereas the seasonal parasite dynamics are likely to be affected by changes in the age-structure of the snail population. The probability of sporocyst infections increased with snail size, but no such trend was observed in redial or metacercarial infections which decreased with host size. Our results show that generally well-described spatiotemporal differences in trematode infection of molluscs can emerge in very narrow spatial and temporal scales, which emphasizes the importance of these factors in community studies.