Subannual temporal variation in faunal distributions at the TAG hydrothermal mound (26°N, Mid-Atlantic Ridge)
Subannual temporal variation in faunal distributions at the TAG hydrothermal mound (26°N, Mid-Atlantic Ridge)
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DOI：
10.1046/j.1439-0485.1999.2034076.x
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发表时间：
1999-12-01
期刊：
影响因子：
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通讯作者：
Sulanowska, M
中科院分区：
文献类型：
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作者：
Copley, JTP;Tyler, PA;Sulanowska, M
本文评估了动态的两个动物群组合殖民高温和低温栖息地的TAG热液丘在大西洋中脊。Timelapse视频和摄影断面被用来监测虾和海葵种群的变化，从1994年6月至1995年3月。在此期间，大洋钻探计划在目标人群附近钻探了一些钻孔。先验预期的快速重新分配的能动alvinocaridid虾占据最佳的热和化学栖息地，以应对水热活动的模式的变化得到了满足的水热活动和虾种群密度增加的观察，在现场部署了延时视频系统。的重要性，热液活动作为一个控制的喷口虾的分布建议由潮汐变化的虾的分布在一个minidiffuser烟囱。ODP钻探期间的沉积物沉积导致虾暂时扰乱了时间推移视频中看到的丘表面的平坦部分。在虾的分布观察到的变化相反，在两个摄影断面10个月分开的土墩海葵的分布观察到的变化不大，除了海葵被掩埋的ODP孔周围的沉积物的局部干扰。虾和海葵对热液系统变化的反应不同，可能是由于它们的能动性和生物活动率不同，或者反映了虾的营养地位较低。
This paper evaluates the dynamics of two faunal assemblages colonizing high- and low-temperature habitats of the TAG hydrothermal mound on the Mid-Atlantic Ridge. Timelapse video and photographic transects were used to monitor changes in shrimp and anemone populations from June 1994 to March 1995. During this period, holes were drilled in the vicinity of the target populations by the Ocean Drilling Program (ODP). The a priori expectation of a rapid redistribution of motile alvinocaridid shrimp to occupy the optimal thermal and chemical habitat in response to changes in the pattern of hydrothermal activity was met by the observation of an increase in hydrothermal activity and shrimp population density at the site where a timelapse video system was deployed. The importance of hydrothermal activity as a control on the distribution of vent shrimp is suggested by tidal variations in the distribution of shrimp on a minidiffuser chimney. Sediment deposition during ODP drilling resulted in a temporary disturbance of the shrimp occupying the flat part of the mound surface seen by the timelapse video. In contrast to the changes observed in shrimp distribution, little change was observed in the distribution of anemones across the mound in two photographic transects 10 months apart, with the exception of a localized disturbance where anemones were buried by sediment around an ODP hole. Differences in the response of the shrimp and anemones to changes in the hydrothermal system may result from differences in their motility and rates of biological activity, or reflect a lower trophic position in the case of the shrimp.