CPR data from the North Pacific and Atlantic 1958 - 2021 (please do no disseminate)

Zip file containing CPR observations and the taxa list from the North Pacific and Atlantic between 1958 and 2021 for routine collected taxa, at sample level data (each sample being 1 row, equating to approx. 10 nautical miles of tow, 3m3 of filtered seawater). There are two csv files, the first contains the taxa counts (NPacifc_Atlantic_CPR_1958_2021.csv), the second contains the taxa names and their ID used within the CPR Survey (taxa_info.csv) and a sample location map within the zip file. The abundance counts csv includes the following information in columns - A: midpoint of sample local date and time B: sample_id C: midpoint of sample latitude in decimal degrees D: midpoint of sample longitude in decimal degrees E:chlorophyll index F:onwards = taxa counts per sample. NaN is when the taxon was not looked for. See 'taxa_info' sheet for more information on the headers. The Continuous Plankton Recorder (CPR) is a marine sampler that is towed behind volunteer ships of opportunity at speeds of up to ∼20 knots and samples at a depth of ∼7 m below the surface. The CPR unit is a metal casing in the shape of a ∼1 m torpedo that houses a roll of silk which automatically rotates using a geared propeller system. The seawater enters the front aperture where plankton and small particles are captured onto the rotating silk, which has a mesh size of 270 µm. This silk is stored in 4 % buffered formalin to preserve the sample until microscopic analysis at the laboratory in Plymouth. The silk is cut into pre-defined sections that represent one sample and equate to 10 nautical miles of tow. Phytoplankton and zooplankton are identified and counted at different stages of the microscopic analysis: semi-quantitative count of phytoplankton across 20 fields of view per sample, quantitative count of all zooplankton >= 2 mm (these are picked off the silk for identification), and semi-quantitative traverse count of all zooplankton 2 mm. For a more in-depth description of the sampling methodology please refer to Richardson et al. (2006). The Phytoplankton Colour Index (chlorophyll index) is a record of the colour gradient of the mesh as one of 4 colour categories (0,1,2,6.5) and has been shown to relate to the chlorophyll content of the water, including organisms not visible in the sample (Raitsos et al., 2013, Raitsos, D.E., Walne, A., Lavender, S.J., Licandro, P., Reid, P.C., and Edwards, M. 2013. A 60-year ocean colour data set from the Continuous Plankton Recorder. Journal of Plankton Research, 35(1): 158–164). Note: Please do not disseminate, only selected taxa have been included in this data extract, for specific taxa requirements please email [e-mail].

本压缩包包含1958至2021年间北太平洋与北大西洋海域常规采集的浮游生物类群观测数据及类群名录，采用样本级数据格式（每条数据对应1个样本，约相当于10海里拖曳航程、过滤了3立方米海水）。

压缩包内包含两个CSV文件：其一为类群计数文件NPacifc_Atlantic_CPR_1958_2021.csv；其二为CPR调查中使用的类群名称及对应ID表taxa_info.csv，同时包含样本位置地图。

该丰度计数CSV文件的各列信息如下：A列为样本本地日期时间中点，B列为样本ID，C列为样本纬度中点（十进制度格式），D列为样本经度中点（十进制度格式），E列为叶绿素指数，F列及后续各列为单样本的类群计数。若某类群未被纳入统计，则对应单元格为NaN。表头的详细说明请参阅taxa_info文件。

连续浮游生物记录仪（Continuous Plankton Recorder, CPR）是一种海洋采样设备，由志愿随行商船拖曳作业，最大拖曳速度约20节，采样深度为海面下约7米。CPR装置主体为长约1米的鱼雷形金属外壳，内部装有一卷丝绸滤网，通过齿轮传动螺旋桨系统实现自动转动。海水从前部入口进入，浮游生物与微小颗粒会被截留在孔径为270微米的旋转丝绸滤网上。采样后的丝绸滤网会被保存在4%缓冲福尔马林中，直至送至普利茅斯实验室进行镜检分析。滤网会被切割为预设分段，每一段对应1个样本，相当于10海里的拖曳航程。

浮游植物与浮游动物会在镜检的不同阶段完成鉴定与计数：对每个样本的浮游植物进行20个视野的半定量计数；对所有体长≥2毫米的浮游动物进行定量计数（需从滤网上挑取个体以完成鉴定）；对所有体长2毫米的浮游动物进行半定量遍历计数。若需了解采样方法的详细说明，请参考Richardson等人（2006）的研究。

浮游植物颜色指数（Phytoplankton Colour Index）即叶绿素指数，以4个颜色等级（0、1、2、6.5）记录滤网的颜色梯度，研究表明该指数与水体叶绿素含量相关，包括样本中不可见的生物体（Raitsos等人，2013；Raitsos, D.E.、Walne, A.、Lavender, S.J.、Licandro, P.、Reid, P.C.及Edwards, M.，2013。《来自连续浮游生物记录仪的60年海洋颜色数据集》，《浮游生物研究期刊》，35(1): 158–164）。

注意事项：请勿传播该数据集；本次数据提取仅包含部分选定的类群；若有特定类群需求，请发送邮件至[e-mail]。