Abundance and distribution of coastal, inshore zooplankton in the Huon Estuary and D'Entrecasteaux Channel, Tasmania: Sampling trip 11/02/2005

Mesozooplankton community composition and structure were examined throughout the D’Entrecasteaux Channel, Huon Estuary and North West Bay, Tasmania, from November 2004 to October 2005, the data represented by this record was collected on the 11/02/2005.The composition of the mesozooplankton community was typical of inshore, temperate marine habitats, with seasonally higher abundance in summer and autumn and lower numbers in winter and spring. Copepods were the largest contributors to total abundance across all seasons and stations, while cladocerans and appendicularians were proportionally abundant in spring and summer. The faecal pellets of these three main groups, along with those of krill and amphipods, also contributed significantly to material recovered from sediment traps. Meroplanktonic larvae of benthic animals showed short-term peaks in abundance and were often absent from the water column for long periods. Spatially, North West Bay and the Channel had a higher representation of typically marine species, including Calanus australis and Labidocera cervi, while truly estuarine species, such as the copepod Gladioferens pectinatus, were more important in the Huon Estuary.

2004年11月至2005年10月，研究人员对塔斯马尼亚州德恩特卡斯托海峡（D’Entrecasteaux Channel）、胡恩河口（Huon Estuary）以及西北湾（North West Bay）全域的中型浮游动物（Mesozooplankton）群落组成与结构开展了调查，本次记录所呈现的数据采集于2005年2月11日。该中型浮游动物群落组成符合近岸温带海洋生境的典型特征，其丰度呈现显著季节波动：夏季与秋季丰度较高，冬季与春季丰度较低。桡足类（Copepods）是所有调查季节与站位总丰度的最主要贡献类群，而枝角类（cladocerans）与幼形类（appendicularians）在春季与夏季的相对丰度更高。上述三大类群以及磷虾（krill）、端足类（amphipods）的粪球，也对沉积物捕集器回收的有机质组分做出了显著贡献。底栖动物的阶段性浮游幼体（meroplanktonic larvae）丰度存在短期峰值，且往往会长时间在水体中缺失。空间分布上，西北湾与德恩特卡斯托海峡的典型海洋物种占比更高，包括澳大利亚哲水蚤（Calanus australis）与Labidocera cervi；而真正的河口物种，如桡足类Gladioferens pectinatus，在胡恩河口的群落重要性更高。