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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Consistent deleterious effects of vermetid gastropods on coral performance
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Consistent deleterious effects of vermetid gastropods on coral performance

机译：一致的腹足动物对珊瑚生长性能的有害影响

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摘要

The strength of species interactions is a key driver of ecological dynamics, yet relatively little is known about spatial, temporal, or among-individual variation in interspecific interactions. Here, we evaluate variability in the strength of interactions between a guild of sessile vermetid gastropods and a reef-building coral, Pocillopora verrucosa. Vermetid gastropods are sessile, tube-building snails that feed on drifting paniculate matter via extruded mucus nets. Previous work indicates that vermetids can reduce growth and survival of neighboring coral colonies, though the generality of this result (e.g., among coral genotypes, and across environmental gradients) is unknown. Here, we manipulated the presence/absence of vermetids on 10 patch reefs within each of 6 field sites, and quantified the growth and survival of small transplanted corals (taken from three distinct colonies) over 155 days. Two-way ANOVA indicated that vermetids had deleterious effects on both coral growth and survival, and that these effects did not vary substantially across sites spanning an area of -350 ha. Generalized linear mixed models were used to account for correlated responses of corals across environmental gradients, and these analyses indicated that the effects of vermetids were also consistent among coral colonies (i.e., putative genotypes that likely differed in phenotype, zooxanthellae/microbial composition, environmental history, etc.). Deleterious effects of vermetids on corals thus appear to be consistent in space and across coral colonies.
机译：物种相互作用的强度是生态动力学的关键驱动力，但关于种间相互作用的空间，时间或个体间差异了解得很少。在这里，我们评估了无柄的类腹足动物协会和造礁珊瑚Pocillopora verrucosa之间的相互作用强度的变异性。蠕足的腹足类动物是无管的蜗牛，通过挤压的粘液网以漂浮的颗粒状物质为食。先前的研究表明，尽管这种结果的普遍性（例如，在珊瑚基因型之间以及在整个环境梯度中），但类固醇可以减少邻近珊瑚群落的生长和生存。在这里，我们处理了6个野外地点每个10个斑块礁上是否存在ver虫，并在155天之内量化了小型移植珊瑚（取自三个不同殖民地）的生长和存活。双向方差分析表明，类温虫对珊瑚的生长和生存均具有有害影响，并且这些影响在-350公顷的区域内几乎没有变化。广义线性混合模型用于解释珊瑚在整个环境梯度中的相关响应，这些分析表明，在珊瑚菌落之间，met虫的作用也是一致的（即，假定的基因型可能在表型，虫黄藻/微生物组成，环境史上有所不同）等）。因此，线虫对珊瑚的有害影响在空间和整个珊瑚群落中似乎是一致的。

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