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首页> 外文期刊>Journal of Parasitology >The Role of Spatial and Temporal Heterogeneity and Competition In Structuring Trematode Communities In the Great Pond Snail, Lymnaea stagnalis (L.).
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The Role of Spatial and Temporal Heterogeneity and Competition In Structuring Trematode Communities In the Great Pond Snail, Lymnaea stagnalis (L.).

机译：时空异质性和竞争在构造大池塘蜗牛（Lymnaea stagnalis（L.））中的吸虫群落中的作用。

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Abstract : We assessed how spatial and temporal heterogeneity and competition structure larval trematode communities in the pulmonate snail Lymnaea stagnalis . To postulate a dominance hierarchy, mark-release-recapture was used to monitor replacements of trematode species within snails over time. In addition, we sampled the trematode community in snails in different ponds in 3 consecutive years. A total of 7,623 snails (10,382 capture events) was sampled in 7 fishponds in the Jindrichuv Hradec and Trebon areas in South Bohemia (Czech Republic) from August 2006 to October 2008. Overall, 39% of snails were infected by a community of 14 trematode species; 7% of snails were infected with more than 1 trematode species (constituting 16 double- and 4 triple-species combinations). Results of the null-model analyses suggested that spatial heterogeneity in recruitment among ponds isolated trematode species from each other, whereas seasonal pulses in recruitment increased species interactions in some ponds. Competitive exclusion among trematodes led to a rarity of multiple infections compared to null-model expectations. Competitive relationships among trematode species were hypothesized as a dominance hierarchy based on direct evidence of replacement and invasion and on indirect evidence. Seven top dominant species with putatively similar competitive abilities (6 rediae and 1 sporocyst species) reduced the prevalence of the other trematode species developing in sporocysts only.
机译：文摘：我们评估了肺钉Ly幼虫幼虫吸虫的时空异质性和竞争结构。为了推测优势等级，使用了标记释放释放来监视蜗牛内吸虫种类随时间的变化。此外，我们连续3年在不同池塘的蜗牛中对吸虫的吸虫群落进行了采样。从2006年8月至2008年10月，在南波希米亚（捷克共和国）的Jindrichuv Hradec和Trebon地区的7个鱼塘中采样了总共7,623只蜗牛。总共，39％的蜗牛被14根线虫感染。种类; 7％的蜗牛感染了1种以上的吸虫（构成16个双物种和4个三物种组合）。零模型分析的结果表明，池塘中募集的空间异质性使吸虫物种彼此隔离，而季节性脉动在某些池塘中增加了物种之间的相互作用。与空模型预期相比，吸虫之间的竞争性排斥导致了多次感染的罕见。根据替代和入侵的直接证据和间接证据，将吸虫物种之间的竞争关系假设为优势等级。七个具有相似竞争能力的顶级优势种（6个重做和1个孢子囊种）降低了仅在孢子囊中发育的其他吸虫的患病率。

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