Cedrus atlantica pollen FTIR spectra

This dataset contains FTIR spectra of modern Cedrus atlantica pollen samples collected in Morocco, and from Europe and the USA, analysed on a PerkinElmer Spotlight 400 imaging system using a Universal Attenuated Total Reflection (UATR) accessory in the Earth Science Laboratories at The University of Manchester. Please see the "Sample details" file for full information about each sample: This spreadsheet contains details about every pollen sample used in this study. This includes the tree’s location (longitude, latitude, and altitude), the aspect of the tree, i.e. the direction of the slope in degrees, the slope angle, the tree’s diameter at breast height in cm (DBH), the height of the tree in metres, the height at which the strobili (pollen cone) was picked from the tree, and the number of other trees within a 5 metre radius of the sampled tree. The file is organised with Moroccan samples in one table, followed by non-Morocco samples. The available information on samples collected from the Rif Mountains, and those from outside Morocco differs from Moroccan samples. Information on non-Morocco samples includes provenance (where known) and the ID code used by the botanical garden. FTIR spectra: There are three files which contain the complete FTIR spectra for every pollen sample (including replicates) used in this study. The original uncorrected FTIR spectra, baseline-corrected spectra, and z-score standardised spectra are available. These are detailed in the methods section of the associated paper (https://doi.org/10.1177/0959683618777072). Numbers across the top (columns) represent the wavenumber, and the observations are relative absorbance values. Nitrogen data: Most of the pollen samples were also analysed on a CHNS analyser (Symes 2017, unpublished MSc dissertation). Untreated pollen was analysed with 3 replicates. The N values available in the file are an average of the replicates and are shown as a percentage.本数据集收录了采集自摩洛哥、欧洲及美国的现代大西洋雪松（Cedrus atlantica）花粉样本的傅里叶变换红外光谱（Fourier Transform Infrared Spectroscopy, FTIR）数据。所有样本均在曼彻斯特大学地球科学实验室，借助珀金埃尔默（PerkinElmer）Spotlight 400成像系统，搭配通用衰减全反射（Universal Attenuated Total Reflection, UATR）附件完成测试分析。 如需查阅本研究所用全部花粉样本的完整信息，请参阅"样本详情"文件。该电子表格包含每份样本的详细参数，具体包括：样本来源树木的地理位置（经度、纬度与海拔）、坡向（以度数表征的斜坡朝向）、斜坡坡度、树木胸径（Diameter at Breast Height, DBH，单位：cm）、树高（单位：m）、采粉时花粉球（strobili）所在的树体高度，以及采样树木周边5米半径范围内的其他树木数量。文件以表格分区编排，摩洛哥样本置于首表，其后为非摩洛哥样本。需注意，里夫山脉采集的样本与摩洛哥本土其他样本、以及非摩洛哥样本的可用信息存在差异：非摩洛哥样本的信息包含其来源地（若可追溯）以及植物园所用的识别编码。 傅里叶变换红外光谱数据：本数据集包含三份文件，涵盖本研究所用全部花粉样本（含重复样本）的完整FTIR光谱数据，分别为原始未校正光谱、基线校正光谱与z分数标准化光谱。相关细节已在关联论文的方法部分详述（https://doi.org/10.1177/0959683618777072）。光谱文件的列标题为波数，各行观测值为相对吸光度数值。 氮元素数据：多数花粉样本还通过CHNS分析仪完成了氮元素含量测试（Symes 2017，未发表硕士学位论文）。测试采用未经处理的花粉样本，设置3次重复实验。文件中给出的氮含量数值为重复测试的平均值，以百分比形式呈现。