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首页> 外文会议>International conference on remote sensing for marine and coastal environments >Assessing plankton communities with multi-frequency hydroacoustics in estuarine inlets of the southeastern united states
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Assessing plankton communities with multi-frequency hydroacoustics in estuarine inlets of the southeastern united states

机译：在美国东南部河口入口处评估浮游生物群落与多频水声

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Between May 1993 and May 1998, plankton communities were studied with both traditional plankton nets and multi-frequency hydroacoustics within one of three coastal inlets in South Carolina and Georgia. Changes in the number of frequencies used, acoustic frequencies sampled, sampling periodicity, and the depth of each data bin represented advancements in the technology during the sampling time period. Inverse calculations enabled estimates of abundance by particle size for comparisons with some catches from plankton nets. Estimates of relative biovolume of several taxonomic groups were significantly correlated with net collections, particularly in nearshore coastal waters. Lower correlations were found within the dynamic inlets, where high spatial and temporal variability in the plankton and water masses is the general pattern. Changes in vertical distribution of the plankton community responded to both cyclic (diel and tidal) and stochastic (wind) environmental variations. Generally, the plankton community indicated an increased abundance and uniform distribution throughout the water column during night. Resuspension of fine particles off the bottom were directly related to tidal changes in water velocity. Plankton size classes appeared to layer within the water column with the smallest scatters deepest. Spatial distribution of plankton across coastal inlets responded to numerous inter-related physical and meteorological conditions, including tidal stage and bottom topography.
机译：1993年5月至1998年5月，在南卡罗来纳和格鲁吉亚的三个沿海入口之一中，在传统的浮游生网和多频对多频水声道中研究了普拉克斯族社区。所用频率数的变化，声频采样，采样周期性和每个数据箱的深度在采样时间段期间表示技术的进步。逆计算使得通过粒度的粒度使丰富的估算能够与来自浮游生物网的一些捕获量进行比较。几个分类群的相对生物组估计与净收量显着相关，特别是在近岸沿岸水域。在动态入口内发现了较低的相关性，其中浮游生物和水质量的高空间和时间变异是一般的图案。浮游生物群落的垂直分布的变化响应循环（Diel和潮汐）和随机（风）环境变异。通常，浮游生物群落在夜间在整个水柱上表明了增加的丰富和均匀分布。从底部重新悬浮细颗粒与水速度的潮汐变化直接相关。 Plankton大小的课程在水柱内似乎是最小的散热器。沿海地区岸边的浮游生物的空间分布应对众多与潮流和底部地形相互作用的近似相关的物理和气象条件。

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