Phytoplankton abundance data from pelagic surveys in the Celtic Seas and English Channel for autumn 2017 to 2023

Peltic is an ongoing annual autumn pelagic survey on the research vessel Cefas Endeavour in the English Channel, Celtic Sea and Bristol Channel running from 2012-present. This dataset comprises phytoplankton abundance and size data for CEND19 _ 17, CEND17 _ 18, CEND15 _ 19, CEND16 _ 20, CEND16 _ 21, CEND16 _ 22, CEND15 _ 23. Samples were collected from the continuous flow FerryBox water supply (approx. 4m water depth) in a 500 ml container and fixed with 2-3 ml of 25% acidified Lugol iodine solution. Phytoplankton species and abundance (cells per litre) were determined after sedimentation of the samples in 5 - 25 ml glass chambers, and using an inverted microscope. Sizes of most common taxa were measured with a micrometer.
Abundances of phytoplankton species were then grouped based on functional groups (e.g. centric diatoms, pennate diatoms).

Peltic是一项自2012年起在英吉利海峡、凯尔特海和布里斯托尔海峡开展的年度秋季远洋调查（pelagic survey），使用研究船Cefas Endeavour进行。本数据集包含CEND19_17、CEND17_18、CEND15_19、CEND16_20、CEND16_21、CEND16_22、CEND15_23的浮游植物（phytoplankton）丰度及尺寸数据。样本通过连续流动的FerryBox供水系统（水深约4米）采集于500毫升容器中，并使用2-3毫升25%酸化卢戈氏碘液（acidified Lugol iodine solution）固定。浮游植物的种类及丰度（细胞/升）通过将样本在5-25毫升玻璃培养皿中沉降后，使用倒置显微镜（inverted microscope）测定。随后，浮游植物种类的丰度根据功能群（functional groups）（例如中心硅藻（centric diatoms）、羽纹硅藻（pennate diatoms））进行分组。