Quantitative phytoplankton profiles for Pensacola Transect Station P9 collected during the R/V Bellows cruise of DeSoto Canyon, May 31, 2014

This dataset reports phytoplankton species abundance data for samples collected from the R/V Bellows during the May 31-June 1, 2014 cruise. Samples were taken at Pensacola Transect Station P9 (29.41667 degrees N, 87.25 degrees W) in the Florida Panhandle Bight at the head of DeSoto Canyon. One-liter samples were collected from the surface and at depths of 25, 50, 75, 100, 125, 150, 200, and 395 meters using Niskin bottles. Up to one liter of each sample was filtered onto a 0.45 micrometer nitrocellulose filter and air-dried. A portion of each filter was mounted on an aluminum stub, sputter-coated, and examined with a JEOL JSM-6480 LV scanning electron microscope. Diatoms, coccolithophores, and armored dinoflagellates were identified to the lowest possible taxonomic category. The number of cells of each taxon in a field of view at a magnification of 1000x was recorded, with up to 700 fields-of-view examined, depending on the density of phytoplankton in the sample. The dataset includes the depth, the volume filtered, the number of cells of each taxon counted, and the calculated abundance of each taxon in cells per liter. Micrographs taken during the analysis are included.本数据集收录了2014年5月31日至6月1日期间，由“贝洛斯号”（R/V Bellows）科考船执行航次所采集的浮游植物（phytoplankton）物种丰度数据。样本采集于德索托峡谷（DeSoto Canyon）入口处的佛罗里达潘汉德尔湾（Florida Panhandle Bight）彭萨科拉断面P9站位（地理坐标：北纬29.41667°，西经87.25°）。本次采样采用尼斯金采水器（Niskin bottles），采集表层及25、50、75、100、125、150、200、395米水深的1升海水样本。每份样本最多取1升体积，通过0.45微米硝酸纤维素滤膜（0.45 micrometer nitrocellulose filter）过滤后风干。取部分滤膜粘贴于铝样品台（aluminum stub），经溅射镀膜（sputter-coated）后，使用JEOL JSM-6480 LV型扫描电子显微镜进行观测。硅藻（diatoms）、颗石藻（coccolithophores）及具甲甲藻（armored dinoflagellates）均被鉴定至尽可能低的分类阶元。以1000倍放大倍率统计每个视野（field of view）内各分类单元的细胞数量，依据样本中浮游植物的密度，最多可观测700个视野。本数据集包含采样水深、过滤水样体积、各分类单元的计数细胞数，以及计算得到的每升水样中各分类单元的丰度值。数据集同时收录分析过程中拍摄的显微照片（micrographs）。