Growth and longevity of the tubeworm Ridgeia piscesae in the variable diffuse flow habitats of the Juan de Fuca Ridge
Growth and longevity of the tubeworm Ridgeia piscesae in the variable diffuse flow habitats of the Juan de Fuca Ridge
复制标题
胡安德富卡山脊可变扩散流生境中管虫 Ridgeia piscesae 的生长和寿命
DOI：
10.3354/meps06710
复制
发表时间：
2007
影响因子：
2.5
通讯作者：
C. Fisher
中科院分区：
文献类型：
--
作者：
I. Urcuyo;D. Bergquist;I. MacDonald;M. Vanhorn;C. Fisher
热液喷口管虫Ridgeia piscesae在东北太平洋的喷口环境中占主导地位。一个常见的喷口栖息地，其中R。piscesae火山岩是玄武岩基底上的扩散喷流。我们使用了离散水样的化学分析，结合7个聚集体的长期温度监测，以描述“长瘦”形态型的R。鱼我们还监测了来自8个单独聚集体的536个个体的原位生长。温度数据显示，大多数个体在羽流水平上暴露于喷口流体的程度与先前研究的其他热液喷口管虫相比极低，这表明在小的空间和克里思尺度上存在显著的微生境异质性。该形态型的生长速率与对照相比有显著差异。双鱼座的范围为0至252毫米/年，同一聚集体中的个体之间以及不同喷口地点之间的差异很大。然而，连续几年的个体生长率没有显示出显著差异，并且是相关的，这表明这些聚集体中的硫化物源具有长期稳定性。这项研究发现管虫初始大小与相应的生长率之间没有显着关系。在整个数据集的聚合中的烟羽层温度的中位数与增长率没有显着相关。此外，非常保守的寿命估计表明，这种形态型的R。鱼类在胡安德富卡海脊的热液喷口环境中生活了几十年。
The hydrothermal vent tubeworm Ridgeia piscesae visually dominates the vent envi- ronments in the northeast Pacific. One common vent habitat where R. piscesae flourishes is among diffuse vent flow on basaltic substrata. We used chemical analysis of discrete water samples combined with long-term temperature monitoring in 7 aggregations to characterize the immediate habitat of the 'long-skinny' morphotype of R. piscesae. We also monitored in situ growth of 536 indi- viduals from 8 separate aggregations. The temperature data show that exposure of most individuals to vent fluid at the plume level is extremely low compared to other previously studied hydrothermal vent tubeworms, which indicates significant microhabitat heterogeneity at small spatial and tempo- ral scales. The growth rates of this morphotype of R. piscesae ranged from 0 to 252 mm yr -1 and were highly variable between individuals in the same aggregation and between different vent sites. How- ever, individual growth rates in consecutive years show no significant difference and are correlated, indicating long-term stability of the sulfide source in some of these aggregations. This study found no significant relationship between initial tubeworm size and corresponding growth rates. The median plume-level temperature in an aggregation was not significantly correlated with growth rate over the entire dataset. In addition, very conservative longevity estimates suggest that this morphotype of R. piscesae lives for decades in the hydrothermal vent environments of the Juan de Fuca Ridge.