Dataset of micro-phytoplankton biodiversity in the Eastern Channel area from 1987 to 2019.

Micro-phytoplankton communities are widely influenced by the environment and seasonal cycling. The French-English Channel is a system between the East Atlantic and the North Sea with contrasted coastal areas along the French coast. In a context of changing environment, it is crucial to understand the causes and consequences of environmental variability on marine compartments whose phytoplankton represent the first link. Thanks to various monitoring programs such as REPHY (REPHY – French Observation And Monitoring Program For Phytoplankton And Hydrology In Coastal Waters, 2021) and RHLN (Regional Observation and Monitoring programs for Phytoplankton and Hydrology in the eastern English Channel), datasets of micro-phytoplankton diversity are available since the late 80s at a national scale. Here, we present a subset of these datasets on micro-phytoplankton community. It gathers diversity and abundance from 1987 to 2019. Compared to the main dataset, a taxonomical review was done to ensure a correct spatial and temporal homogenization of the taxonomical denomination (description below). We also focus on 6 monitored stations along the French Channel coast; Antifer ponton pétrolier, Cabourg, Géfosse, Donville, At so and St Cast – Les Hébihens (gathering of two times series geographically close). A graphical visual of the sampling history (for the FLORTOT standard protocol) is available in the uploaded image below. The dataset comes from a national-wide standard protocol of water sampling (Neaud-Masson, 2016). All records are stored in the Quadrige² platform, the reference information system for coastal waters in France. A compilation of the various results obtained at the French national scale was done on the last 30 years of monitoring (Belin and Soudant, 2018). The sampling is done at water surface (0-1 meter) around the high tide period (+/- 2 hours), it is fixed through lugol acid on arrivals at the lab and analysed through reversed microscopy by experts trained through a similar 2 years learning process. The taxa are identified to the lowest taxonomic level possible and names are updated according to the WORMs’ denomination base. Since 2015, evaluations (International Phytoplankton Intercomparison - IPI) are being implemented at the European scale, coordinated by the Marine Institute of Galway, to reduce identification deviations and biases between laboratories. The columns are described as following: <strong>#1 : Taxa_Name</strong> Due to the extent of the initial dataset, both in space and time, a work of homogenization in the taxa’s denomination was applied. Therefore, associated with this dataset, we made available a table that summarizes changes applied in the nominations. It displays all the taxa initially present in the REPHY database (first column), the change in denomination applied if needed as they are not at the same resolution between stations’ laboratories, or because two species are now grouped into a common denomination. There is an “X” if the taxa is not relevant, rare, or not a phytoplankton or protist of interest and therefore it means the taxa was deleted and is not in the given dataset (second column) and potential comments or justifications (third column). It has been build and reviewed several times by the phytoplankton experts from the three Ifremer laboratories covering the stations (Dinard, Port en Bessin and Boulogne sur Mer). <strong>#2 to 5 : Date, Day, Month, Year</strong> Temporal description of the samples. Details of the sampling history are given in the image below. <strong>#6 : Season</strong> Defined as Spring = March to May; Summer = June to August; Autumn = September to November; Winter = December (Y) to February (Y+1) <strong>#7 and 8 : Julian_days and week number</strong> <strong>#9 and 10 : Station_FullName and Station_Code</strong> <strong></strong>In the REPHY monitoring program, stations are both describe by full name locations and codes. The same level of detail was kept available in this version, with : Antifer ponton pétrolier (010-P-001), Cabourg (010-P-109), Géfosse (014-P-023), Donville (018-P-054), At so (006-P-001) and St Cast – Les Hébihens (022-P-002) <strong>#11: Parameter</strong> FLORTOT (standard samples, all micro-phytoplanktonic species are identified). FLORPAR (partially identified samples in area identified as under any sanitary risk). FLORIND (additional samples taken for toxic species monitoring, or for species reaching 100 000 cells per liter or producing toxins are identified). <strong>#12 : Results </strong> Abundance (in cells.L^-1), whose level of detection (lowest value) through the microscopy approach is at 100 cells per liter. <strong>#13 : Class.worms2019</strong> The taxa’s class according to the World Register of Marine Species 2019 (https://www.marinespecies.org/) <strong>#14 : Rank</strong> Taxa's taxonomical rank : Species, Genus, Family, e-species (aka: group of similar species), e-genus (aka : group of similar genus), Class, subclass, Order, Phylum, Other.微型浮游植物群落广泛受环境与季节循环的调控。英吉利海峡法国沿岸海域是东大西洋与北海之间的过渡系统，其法国沿岸区域的海岸环境具有显著异质性。在全球环境变化的背景下，明确环境变异对海洋生态分区的影响机制与生态后果至关重要，而浮游植物作为海洋食物链的首要环节，是研究该问题的核心对象。得益于REPHY（法国近岸水域浮游植物与水文观测监测计划，REPHY – French Observation And Monitoring Program For Phytoplankton And Hydrology In Coastal Waters, 2021）与RHLN（英吉利海峡东部浮游植物与水文区域观测监测计划）等多项国家级监测项目，自20世纪80年代末以来，全国尺度的微型浮游植物多样性数据集已逐步积累完善。 本研究公开的数据集为上述全国监测数据集的子集，涵盖1987年至2019年的微型浮游植物群落多样性与丰度数据。相较于原始主数据集，本数据集已完成分类学审查与标准化处理，以确保分类命名在空间与时间维度上的一致性（详细说明见下文）。本次数据集聚焦英吉利海峡法国沿岸的6个监测站位：安蒂费石油码头（Antifer ponton pétrolier）、卡堡（Cabourg）、热福斯（Géfosse）、唐维尔（Donville）、阿特索（At so）以及圣卡斯特-莱埃比昂（St Cast – Les Hébihens，该站位由两个地理位置邻近的时间序列监测数据合并而成）。本次上传的附件图片中包含FLORTOT标准采样流程的采样历史可视化图表。 本数据集基于全国统一的海水采样标准流程（Neaud-Masson, 2016）构建，所有记录均存储于法国近岸水域参考信息系统Quadrige²平台中。研究团队已基于法国近30年的监测数据完成全国尺度的结果汇编（Belin与Soudant, 2018）。采样工作在高潮时段前后2小时内的海水表层（0-1米）开展，样品送至实验室后立即通过鲁格尔碘液固定，随后由经过两年标准化培训的专业人员通过倒置显微镜进行分析。分类单元鉴定至尽可能低的分类层级，物种名称依据世界海洋物种登记册（World Register of Marine Species, 简称WoRMS）的命名基准进行更新。自2015年起，由戈尔韦海洋研究所协调的欧洲尺度浮游植物国际比对计划（International Phytoplankton Intercomparison - IPI）已逐步推行，以降低不同实验室间的鉴定偏差与系统误差。 各字段说明如下： <strong>#1：Taxa_Name（分类单元名称）</strong> 由于原始数据集在空间与时间维度上覆盖范围极广，本数据集已完成分类单元命名的标准化统一工作。随本数据集一同公开的还有一张命名变更汇总表：该表第一列列出了REPHY数据库中初始收录的所有分类单元；第二列标注了需进行命名变更的情况，包括不同站位实验室间的鉴定分辨率不一致，或是两个物种现已合并为统一命名；若某分类单元与研究无关、较为罕见，或并非目标浮游植物/原生生物，则在第二列标注“X”，代表该分类单元已被剔除，未纳入本数据集；第三列则为相关说明或变更理由。该汇总表已由负责覆盖本研究所有站位的三家法国海洋开发研究院（Ifremer）实验室（迪纳尔、贝桑港和滨海布洛涅）的浮游植物专家多次审核与修订。 <strong>#2至#5：Date（采样日期）、Day（日）、Month（月）、Year（年）</strong> 用于标注样品的时间信息，采样历史的详细说明见下文附图。 <strong>#6：Season（季节）</strong> 季节划分规则为：春季=3月至5月；夏季=6月至8月；秋季=9月至11月；冬季=当年12月至次年2月。 <strong>#7与#8：Julian_days（儒略日）、week number（周数）</strong> <strong>#9与#10：Station_FullName（站位全称）、Station_Code（站位代码）</strong> 在REPHY监测计划中，站位同时通过全称与代码进行唯一标识。本数据集保留了相同的信息粒度，各站位对应关系如下：安蒂费石油码头（010-P-001）、卡堡（010-P-109）、热福斯（014-P-023）、唐维尔（018-P-054）、阿特索（006-P-001）以及圣卡斯特-莱埃比昂（022-P-002）。 <strong>#11：Parameter（采样参数类型）</strong> 包含三种采样类型：FLORTOT（标准采样方案，对所有微型浮游植物物种进行全面鉴定）、FLORPAR（针对存在卫生风险的区域采集的部分鉴定样品）、FLORIND（为监测有毒物种或细胞浓度达到10万个/升以上的产毒物种而专门采集的额外鉴定样品）。 <strong>#12：Results（丰度结果）</strong> 以细胞·升⁻¹（cells·L⁻¹）为单位的浮游植物丰度数据，该显微镜分析方法的检测下限为100个细胞·升⁻¹。 <strong>#13：Class.worms2019（2019版WoRMS分类纲）</strong> 基于2019年世界海洋物种登记册（World Register of Marine Species, https://www.marinespecies.org/）确定的分类单元所属纲级分类信息。 <strong>#14：Rank（分类层级）</strong> 分类单元的具体分类层级，包括：物种（Species）、属（Genus）、科（Family）、复合物种（e-species，即相似物种类群）、复合属（e-genus，即相似属类群）、纲（Class）、亚纲（subclass）、目（Order）、门（Phylum）及其他（Other）。