A functional and morphological approach to evaluate the vertical migration of estuarine intertidal nematodes during a tidal cycle
A functional and morphological approach to evaluate the vertical migration of estuarine intertidal nematodes during a tidal cycle
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DOI：
10.1007/s10152-012-0306-3
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发表时间：
2013-03-01
影响因子：
--
通讯作者：
Lana, P. C.
中科院分区：
文献类型：
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作者：
Brustolin, M. C.;Thomas, M. C.;Lana, P. C.
我们在这里测试了这样一个假设，即暴露时间显著影响了线虫在潮汐周期中的垂直分布，这是不同的摄食和运动行为的函数，受身体形态的影响。我们发现，细长的丝状尾鱼的垂直分布与潮汐变化引起的泥沙变化密切相关。相反，没有任何其他线虫物种表现出明确的垂直迁移证据。水平空间异质性也影响了线虫群落的垂直分布，这可能是对沉积物表面不同温度和干燥程度的反应。由此产生的个体或物种群体的垂直剖面是运动和取食策略以及协调的形态适应之间的权衡。
We tested herein the hypothesis that exposure time significantly contributes to the vertical distribution profile of nematodes during a tidal cycle as a function of distinct feeding and locomotion behaviors, conditioned by body morphology. We showed that the vertical distribution profile of the slender with filiform tail, numerically dominant Terschellingia longicaudata is in fact significantly correlated with sediment changes induced by tidal variation. Conversely, none of the other nematode species showed unequivocal evidence of vertical migration. Horizontal spatial heterogeneity also influenced the vertical distribution of nematode associations, probably as a response to varying temperature and desiccation levels at the sediment surface. The resulting vertical profiles for individual or species groups are a trade-off among locomotory and feeding strategies and concordant morphological adaptations.