Abundance and distribution of coastal, inshore zooplankton in the Huon Estuary and D'Entrecasteaux Channel, Tasmania: Sampling trip 07/12/2004

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 07/12/2004The 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月期间，研究团队对塔斯马尼亚州丹特卡斯托海峡（D’Entrecasteaux Channel）、胡恩河口湾（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，本记录对应的数据采集于2004年12月7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，其丰度呈现季节波动：夏、秋季丰度较高，冬、春季丰度偏低。在所有季节与调查站位中，桡足类（Copepods）均为群落总丰度的最大贡献类群；枝角类（Cladocerans）与尾海鞘类（Appendicularians）的相对丰度则在春、夏季更高。上述三大类群以及磷虾（Krill）、端足类（Amphipods）的粪便颗粒，对沉积物捕集器回收的有机质也有显著贡献。底栖动物的暂时性浮游幼体丰度呈现短期峰值，且往往会长时间在水体中缺失。空间分布上，西北湾与丹特卡斯托海峡的典型海洋物种占比更高，包括南方哲水蚤（Calanus australis）与Labidocera cervi；而典型河口物种，如桡足类Gladioferens pectinatus，在胡恩河口湾的占比更高。