Occurrence Download

A dataset containing 12369 species occurrences available in GBIF matching the query:
{
"and" : [
"HasGeospatialIssue is false",
"HasCoordinate is true",
"OccurrenceStatus is Present",
{
"not" : {
"BasisOfRecord" : [
"is one of (Fossil, Living Specimen)"
]
}
},
"TaxonKey is Cynodon dactylon (L.) Pers.",
"Year is less than or equal to 2000",
"Year is greater than or equal to 1970",
{
"or" : [
{
"not" : {
"EstablishmentMeans" : [
"is one of (MANAGED, INTRODUCED)"
]
}
},
"EstablishmentMeans is null"
]
},
{
"or" : [
"CoordinateUncertaintyInMeters is less than 1000",
"CoordinateUncertaintyInMeters is null"
]
}
]
}

The dataset includes 12369 records from 422 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0017939-250402121839773/datasets/export for details.

Data from some individual datasets included in this download may be licensed under less restrictive terms.

本数据集收录了GBIF（Global Biodiversity Information Facility）中符合以下查询条件的12369条物种发生记录：
需同时满足以下全部条件：
- 无地理空间问题（HasGeospatialIssue）；
- 包含有效坐标（HasCoordinate）；
- 发生状态为"存在"（Present）；
- 记录基础类型（BasisOfRecord）非化石（Fossil）或活标本（Living Specimen）；
- 分类单元键（TaxonKey）对应学名狗牙根（Cynodon dactylon (L.) Pers.）；
- 采集年份介于1970年至2000年之间（含两端）；
- 满足以下任一条件：
1. 建立方式（EstablishmentMeans）非管理种（MANAGED）或引入种（INTRODUCED）；
2. 建立方式字段为空；
- 满足以下任一条件：
1. 坐标不确定性（单位：米，CoordinateUncertaintyInMeters）小于1000；
2. 坐标不确定性字段为空。

本数据集共计12369条记录，源自422个组成数据集；详细信息请参阅：https://api.gbif.org/v1/occurrence/download/0017939-250402121839773/datasets/export

本下载包中包含的部分独立数据集的数据，可能采用限制更为宽松的授权协议。