Larvae of benthic invertebrates in hydrothermal vent plumes over Juan de Fuca Ridge
Larvae of benthic invertebrates in hydrothermal vent plumes over Juan de Fuca Ridge
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胡安德富卡海岭热液喷口羽流中的底栖无脊椎动物幼虫
DOI：
10.1007/bf00350680
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发表时间：
1995
期刊：
影响因子：
2.4
通讯作者：
E. Baker
中科院分区：
文献类型：
--
作者：
L. Mullineaux;Peter H. Wiebe;E. Baker
在Juan de Fuca Ridge上方的水柱中采集的底栖无脊椎动物幼虫，在下方喷口发出的中性浮力热液羽流中和远离热液羽流时，其丰度和组成都有明显的变化。腹足类(Lepetdrilussp.)幼虫平均丰度为21.0个个体1000m−3vs1.4个个体1000m−3)，喷口双壳类幼虫(Calytogena？sp.)仅发生在羽状物中(平均丰度=0.5个个体1000m−3)。其他已知不是胡安德富卡喷口群落特有的底栖类群，如珊瑚虫、文蛤、苔藓虫和棘皮动物，在类似的深度和高度，羽流中的幼虫在羽流中的丰度(平均丰度=47.5vs16.9个体1000m−3)。这些结果支持这样一种假设，即喷口物种的幼虫被带入浮力热液羽流中，并在海底上方数百米的横向扩散水平上被输送。在羽流中发现了与喷口相关的幼虫，这表明用于预测羽流中水动力过程的模型也将有助于模拟幼虫的扩散。将需要先进的成像和新的基于分子的方法来解决某些幼虫类群(例如某些多毛类)的分类不确定性，以便区分喷口种类并对中性浮力羽流中的所有喷口幼虫进行全面的通量估计。
Larvae of benthic invertebrates collected in the water column above Juan de Fuca Ridge show distinct variations in abundance and composition in, and away from, the neutrally-buoyant hydrothermal plume emanating from underlying vents. Larvae of vent gastropods (Lepetodrilussp. and two peltospirid species) occur in significantly higher abundances in the plume than away from it (mean abundance=21.0 individuals 1000 m−3vs 1.4 individuals 1000 m−3), and larvae of vent bivalves (Calyptogena?sp.) occur exclusively in the plume (mean abundance=0.5 individuals 1000 m−3). Larvae from other benthic taxa known not to be endemic to Juan de Fuca vent communities, such as anthozoans, pholad clams, bryozoans and echinoderms, are less abundant in the plume than away (mean abundance=47.5 vs 16.9 individuals 1000 m−3) at comparable depths and heights above the bottom. These results support the hypothesis that larvae of vent species are entrained into buoyant hydrothermal plumes and transported at the level of lateral spreading several hundred meters above the seafloor. The discovery of vent-associated larvae in the plume suggests that models used to predict hydrodynamic processes in the plume will also be useful for modeling larval dispersal. Advanced imaging and new molecular-based approaches will be required to resolve taxonomic uncertainties in some larval groups (e.g. certain polychaete families) in order to distinguish vent species and make comprehensive flux estimates of all vent larvae in the neutrally-buoyant plume.