Locomotor responses to salt stress in native and invasive mud‐tidal gastropod populations (Batillaria),Ecology and Evolution

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Locomotor responses to salt stress in native and invasive mud‐tidal gastropod populations (Batillaria)
Ecology and Evolution ( IF 2.3 ) Pub Date : 2020-11-25 , DOI: 10.1002/ece3.7065
Phuong-Thao Ho _{1,

2} , Hoa Quynh Nguyen _{3,

4,

5} , Elizabeth M A Kern ₄ , Yong-Jin Won _{3,

4}

Affiliation

Plasticity in salt tolerance can be crucial for successful biological invasions of novel habitats by marine gastropods. The intertidal snail Batillaria attramentaria, which is native to East Asia but invaded the western shores of North America from Japan 80 years ago, provides an opportunity to examine how environmental salinity may shape behavioral and morphological traits. In this study, we compared the movement distance of four B. attramentaria populations from native (Korea and Japan) and introduced (United States) habitats under various salinity levels (13, 23, 33, and 43 PSU) during 30 days of exposure in the lab. We sequenced a partial mitochondrial CO1 gene to infer phylogenetic relationships among populations and confirmed two divergent mitochondrial lineages constituting our sample sets. Using a statistical model‐selection approach, we investigated the effects of geographic distribution and genetic composition on locomotor performance in response to salt stress. Snails exposed to acute low salinity (13 PSU) reduced their locomotion and were unable to perform at their normal level (the moving pace of snails exposed to 33 PSU). We did not detect any meaningful differences in locomotor response to salt stress between the two genetic lineages or between the native snails (Japan vs. Korea populations), but we found significant locomotor differences between the native and introduced groups (Japan or Korea vs. the United States). We suggest that the greater magnitude of tidal salinity fluctuation at the US location may have influenced locomotor responses to salt stress in introduced snails.

中文翻译：

本地和入侵泥潮腹足动物种群对盐胁迫的运动反应（Batillaria）

耐盐性的可塑性对于海洋腹足动物成功入侵新栖息地至关重要。潮间带蜗牛Batillaria attramentaria原产于东亚，80 年前从日本入侵北美西海岸，为研究环境盐度如何影响行为和形态特征提供了机会。在这项研究中，我们比较了来自本地（韩国和日本）和引进（美国）栖息地的四个B. attramentaria种群在不同盐度水平（13、23、33 和 43 PSU）下在 30 天的暴露期间的移动距离。实验室。我们对部分线粒体CO1基因进行了测序，以推断种群之间的系统发育关系，并确认了构成我们样本集的两个不同的线粒体谱系。使用统计模型选择方法，我们研究了地理分布和遗传组成对响应盐胁迫的运动性能的影响。暴露于急性低盐度（13 PSU）的蜗牛的运动能力下降，无法达到正常水平（暴露于 33 PSU 的蜗牛的移动速度）。我们没有发现两个遗传谱系之间或本地蜗牛之间（日本与韩国种群）对盐胁迫的运动反应有任何有意义的差异，但我们发现本地和引入群体之间（日本或韩国与韩国种群）之间存在显着的运动差异。美国）。我们认为，美国地区较大的潮汐盐度波动可能影响了引进蜗牛对盐胁迫的运动反应。

更新日期：2021-01-08

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