Hydrodynamics and zooplankton community structure in the lee of Helix Reef, central Great Barrier Reef (1992)

Zooplankton were collected over three consecutive nights of the new moon (4-6 January 1992) in an array of 16 light traps anchored downstream of Helix Reef in the central Great Barrier Reef. Three traps were placed within 50 m of the reef crest (A-C) and the remainder were moored in a regular grid pattern across a NW-SE axis. Most traps were cleared several times each night after the lit periods (2100-2200, 2400-0100, 0300-0400). Zooplankton were identified to 53 taxa from the 105 samples taken and abundances counted. Seven clusters were determined using the parameters dates, sampling times, locations, taxa.A two-step depth-averaged hydrodynamic model was applied. The tidal predictions required to force the data were calculated from historical amplitude and phase data, and wind data from nearby Myrmidon Reef. For fine-scale near-reef circulation a two-dimensional depth-averaged hydrodynamic model was nested within the larger-scale model. Boundary forcing data was obtained from sea level and current predictions generated by the regional model.
To investigate which physical processes determine zooplankton community structure in waters close to coral reefs.
Taxa: Actinotroch larvae; Bivalve larvae; Calanoid Copepoda; Cephalapoda; Ceratium; Chaetognatha; Cirripedia cypris; Cladocera; Crab; Ctenophora; Cumacea; Cyclopoid Copepoda; Decapoda; Decapoda larvae; Doliolum; Echinodermata larvae; Echinopluteus larvae; Euphausiacea; Euphausiacea larvae; Fish eggs; Fish larvae; Foraminifera; Galatheidae; Gammaridea; Gastropoda larvae; Heteropoda; Hydromedusa; Hyperid Amphipoda; Isopoda; Larvacea; Luciferidae; Megalopa; Miscellaneous eggs; Monstrilloid Copepoda; Mysidacea; Nauplii; Ostracoda; Phylosoma larvae; Polychaeta; Polychaeta larvae; Pteropoda; Rhabdosoma; Salpidae; Scyllaridea puerulus; Scyphomedusa; Siphonophora; Stomatopoda; Tornaria larvae; Trochophore larvae; Turbellaria; Zoanthina sp.; Zoea.

1992年1月4日至6日连续三个新月之夜，研究团队在大堡礁中部赫利克斯礁（Helix Reef）下游锚定布设的16台光诱捕器(Light traps)阵列中采集浮游动物(Zooplankton)样本。其中3台捕集器布设于礁冠(reef crest)周边50米范围内（编号A至C），剩余13台按规则网格沿西北-东南轴向锚定布设。多数捕集器在每日夜间点灯时段结束后（21:00-22:00、24:00-01:00、03:00-04:00）多次进行清样操作。本次研究共采集105份样本，对其中的浮游动物完成分类鉴定，共划分出53个分类单元(Taxa)并统计其个体丰度。基于采样日期、采样时段、采样点位及分类单元等参数，将样本划分为7个聚类簇。
本研究采用两步法深度平均水动力模型(Hydrodynamic model)。驱动模型所需的潮汐预报数据基于历史潮汐振幅与相位数据计算得到，气象风场数据则取自邻近的麦尔米登礁（Myrmidon Reef）的观测资料。针对礁体附近的精细尺度环流过程，将二维深度平均水动力模型嵌套于大尺度模型中运行。边界驱动数据取自区域模型输出的海平面高度与海流预报结果。
本数据集旨在探究调控珊瑚礁邻近海域浮游动物群落结构的物理过程。
本次鉴定的分类单元如下：辐轮幼虫(Actinotroch larvae)；双壳类幼虫(Bivalve larvae)；哲水蚤目(Calanoid Copepoda)；头足纲(Cephalapoda)；角藻属(Ceratium)；毛颚动物门(Chaetognatha)；蔓足类腺介幼体(Cirripedia cypris)；枝角类(Cladocera)；蟹类(Crab)；栉水母动物门(Ctenophora)；涟虫目(Cumacea)；剑水蚤目(Cyclopoid Copepoda)；十足目(Decapoda)；十足类幼体(Decapoda larvae)；纽鳃樽(Doliolum)；棘皮动物幼虫(Echinodermata larvae)；海胆幼体(Echinopluteus larvae)；磷虾目(Euphausiacea)；磷虾类幼体(Euphausiacea larvae)；鱼卵(Fish eggs)；鱼类幼体(Fish larvae)；有孔虫(Foraminifera)；铠甲虾科(Galatheidae)；钩虾亚目(Gammaridea)；腹足类幼虫(Gastropoda larvae)；异足目(Heteropoda)；水螅水母(Hydromedusa)；片脚类(Hyperid Amphipoda)；等足目(Isopoda)；尾海鞘纲(Larvacea)；莹虾科(Luciferidae)；大眼幼体(Megalopa)；杂类卵(Miscellaneous eggs)；怪剑水蚤类(Monstrilloid Copepoda)；糠虾目(Mysidacea)；无节幼体(Nauplii)；介形类(Ostracoda)；叶状幼体(Phylosoma larvae)；多毛纲(Polychaeta)；多毛类幼体(Polychaeta larvae)；翼足类(Pteropoda)；棒形磷虾(Rhabdosoma)；樽海鞘科(Salpidae)；龙虾幼体(Scyllaridea puerulus)；钵水母(Scyphomedusa)；管水母目(Siphonophora)；口足目(Stomatopoda)；柱头幼体(Tornaria larvae)；担轮幼体(Trochophore larvae)；涡虫纲(Turbellaria)；群体海葵未定种(Zoanthina sp.)；状幼体(Zoea)。