该数据集包含5个表：\n（1）表土样点记录表\n（2）表土孢粉原始数数据\n（3）表土孢粉百分比含量数据\n（4）表土孢粉质量浓度数据\n（5）表土孢粉组合数据\n包含了农田、荒地、荒漠、草甸、河谷地及林地五种样地类型，孢粉组合是将出现率低、含量较少的科属进行合并，并将花粉按乔木、灌木、草本及农作物进行分类组合。", "ds_source": "
实验方法：样品的采集以梅花式布点，即在样方四周及中心取表土（0-2cm），经混合后作为一个样提取采用氢氟酸过筛法，处理前在样品中加入1粒石松孢子片剂用于计算样品的孢粉质量浓度。样品用10%的盐酸去碳酸钙，10%的氢氧化钠去有机质，浓氢氟酸去硅，然后用超声波振荡器以及10m孔径的网布筛滤残余物，收集网布上的剩余物，经小试管净化后，加甘油保存，制定半活动片在Nikon显微镜下鉴定。统计时，每个样品鉴定500粒以上花粉。
", "ds_process_way": "本数据表是由专人根据记录本手工录入。
\n\n(1)算法和模型介绍: 孢粉百分比含量的计算是以统计到的该种的花粉的数目除以所有统计到的花粉的总数再乘以100%，而孢粉的质量浓度则是用外加石松孢子法计算即加入样品中的石松孢子除以统计到的石松孢子数乘以统计到的该种花粉数目除以样品的重量，以上计算均不包括藻类孢子。
", "ds_quality": "严格按照实验操作规范进行实验操作，花粉的鉴定按照已出版的图版及自制的标准片鉴定。
\n\n(1)数据生产过程: 采用氢氟酸过筛法进行前处理，在Nikon显微镜下鉴定和统计，经EXCEL计算得到花粉百分比含量和质量浓度。\n (2)方法和标准规范: 根据各科属的百分比含量的大小及相对变化和质量浓度的变化结合其它指标反应环境变化，也通过农作物花粉指示人类活动。\n(3)应用范围: 主要用于西北干旱区内陆河流域绿洲生态系统研究。
", "ds_acq_start_time": "2009-01-01 00:00:00", "ds_acq_end_time": "2010-12-31 00:00:00", "ds_acq_place": "黑河流域", "ds_acq_lon_east": 101.54777777777778, "ds_acq_lat_south": 37.17916666666667, "ds_acq_lon_west": 99.57333333333332, "ds_acq_lat_north": 39.340833333333336, "ds_acq_alt_low": 1360.0, "ds_acq_alt_high": 3460.0, "ds_share_type": "apply-access", "ds_total_size": 295424, "ds_files_count": 3, "ds_format": "Excel表格", "ds_space_res": null, "ds_time_res": "年", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "4f753d45-abef-481d-b446-e1ed5d55b349.png", "ds_thumb_from": 2, "ds_ref_way": "黄小忠，黑河流域表土孢粉组合数据集（2009-2010年），国家冰川冻土沙漠科学数据中心(www.ncdc.ac.cn)，2020，doi：10.12072/ncdc.973Desert.db0027.2020", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "eb2b3ac4-919d-433d-b987-bcee1ae83c9e", "ds_serv_man": "李红星", "ds_serv_phone": "0931-4967592", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": null, "quality_level": 3, "publish_time": "2021-01-06 10:25:01", "last_updated": "2021-01-06 10:25:01", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.973Desert.2020.140", "i18n": { "en": { "title": "Sporopollen assemblage data set of surface soil in Heihe River Basin (2009-2010)", "ds_format": "", "ds_source": "Experimental methods: the samples were collected by plum blossom arrangement, that is, the topsoil (0-2cm) was taken around and in the center of the sample. After mixing, it was extracted as a sample. Hydrofluoric acid sieving method was used. Before treatment, a piece of Lycopodium spore tablet was added to the sample to calculate the spore and pollen mass concentration of the sample. The samples were removed with 10% hydrochloric acid, 10% sodium hydroxide, and concentrated hydrofluoric acid. The residues were filtered by ultrasonic oscillator and 10 m aperture mesh. The residues were collected and purified in small test tubes and preserved in glycerin. Semi active tablets were identified under Nikon microscope. More than 500 pollen grains were identified in each sample.
", "ds_quality": "The pollen was identified according to the published plates and self-made standard plates.
\n(1) Data production process: hydrofluoric acid screening method was used for pretreatment, identified and counted under Nikon microscope, and the percentage content and mass concentration of pollen were calculated by Excel.\n(2) Methods and standards: according to the percentage content and relative change of each family and genus, and the change of mass concentration, combined with other indicators to reflect environmental changes, and also through crop pollen to indicate human activities.\n(3) Scope of application: mainly used for Oasis Ecosystem Research of inland river basin in northwest arid area.
", "ds_ref_way": "", "ds_abstract": "The dataset contains five tables:\n(1) Record of topsoil sample points\n(2) Original data of sporopollen in topsoil\n(3) Pollen percentage data of topsoil\n(4) Mass concentration data of sporopollen in surface soil\n(5) Sporopollen assemblage data of topsoil\nIt includes five types of sample plots: farmland, wasteland, desert, meadow, valley and woodland. The pollen assemblage is the combination of families and genera with low occurrence rate and less content, and classifies the pollen according to trees, shrubs, herbs and crops.\n\"Pollen mass concentration\" dimension: grain / g;\n\"Total pollen\" dimension: grains
", "ds_time_res": "年", "ds_acq_place": "Heihe River Basin", "ds_space_res": "", "ds_projection": "", "ds_process_way": "This data sheet is manually entered by a specially assigned person according to the record book.
\n(1) Algorithm and model introduction: The percentage of sporopollen content is calculated by dividing the number of pollen counted by the total number of all pollen counted and multiplying by 100%. The mass concentration of sporopollen is calculated by the method of adding Lycopodium spores, that is, the Lycopodium spores added in the sample are divided by the number of Lycopodium spores counted by the number of pollen counted and dividing by the weight of the sample 。
", "ds_ref_instruction": " " } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "ds_topic_tags": [ "表土样点记录表，土孢粉原始数据，土孢粉百分比含量数据，土孢粉质量浓度数据，土孢粉组合数据" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黑河流域", "黑河" ], "ds_time_tags": [ 2009, 2010 ], "ds_contributors": [ { "true_name": "黄小忠", "email": "xzhuang@lzu.edu.cn", "work_for": "兰州大学西部环境与气候变化研究院", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "黄小忠", "email": "xzhuang@lzu.edu.cn", "work_for": "兰州大学西部环境与气候变化研究院", "country": "中国" } ], "ds_managers": [ { "true_name": "王涛", "email": "wangtao@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" }, { "true_name": "黄小忠", "email": "xzhuang@lzu.edu.cn", "work_for": "兰州大学西部环境与气候变化研究院", "country": "中国" } ], "category": "生态" }