We present a dataset that assembles occurrence records of alien tetrapods (amphibians, reptiles, birds and mammals) in the Iberian Peninsula, a coherent biogeographically unit where introductions of alien species have occurred for millennia. These data have important potential applications for ecological research and management, including the assessment of invasion risks, formulation of preventive and management plans, and research at the biological community level on alien species. This dataset summarizes inventories and data sources on the taxonomy and distribution of alien tetrapods in the Iberia Peninsula, comprising known locations from published literature, expert knowledge and citizen science platforms. An expert-based assessment process allowed the identification of unreliable records (misclassification or natural dispersion from native range), and the classification of species according to their status of reproduction in the wild. Distributional data was harmonized into a common area unit, the 10 × 10 km Universal Transverse Mercator (UTM) system (n = 6,152 cells). The year of observation and/or year of publication were also assigned to the records. In total, we assembled 35,940 unique distribution records (UTM × species × Year) for 253 species (6 amphibians, 16 reptiles, 218 birds and 13 mammals), spanning between 1912 and 2020. The species with highest number of distribution records were the Mediterranean painted frog Discoglossus pictus (n = 59 UTM), the pond slider Trachemys scripta (n = 471), the common waxbill Estrilda astrild (n = 1,275) and the house mouse Mus musculus (n = 4,043), for amphibians, reptiles, birds and mammals, respectively. Most alien species recorded are native to Africa (33%), followed by South America (21%), Asia (19%), North America (12%) and Oceania (10%). Thirty-six species are classified by IUCN as threatened in their native range, namely 2 Critically Endangered (CR), 6 Endangered (EN), 8 Vulnerable (VU), and 20 species Near Threatened (NT). Species maps are provided in DataSet1, as well R code and GIS layers to update them as new records are obtained.

中文翻译：

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伊比利亚半岛外星四足动物的分布

我们提供了一个数据集，该数据集聚集了伊比利亚半岛上外来四足动物（两栖动物，爬行动物，鸟类和哺乳动物）的发生记录，这是一个连贯的生物地理学单元，其中已有数千年的时间引入了外来物种。这些数据对生态研究和管理具有重要的潜在应用价值，包括评估入侵风险，制定预防和管理计划以及在生物群落一级对外来物种进行研究。该数据集总结了有关伊比利亚半岛外来四足动物的分类和分布的清单和数据源，其中包括来自公开文献，专家知识和公民科学平台的已知位置。基于专家的评估过程可以识别不可靠的记录（错误分类或来自自然范围的自然扩散），并根据其在野外繁殖的状况对物种进行分类。分配数据被统一为一个公共区域单位，即10×10 km的通用横轴墨卡托（UTM）系统（n = 6,152个像元）。观察年和/或出版年也已分配给记录。我们总共为1912年至2020年之间的253种（6种两栖动物，16种爬行动物，218只鸟类和13种哺乳动物）收集了35,940条独特的分布记录（UTM×种×年）。分布记录数最多的是地中海彩绘青蛙Discoglossus pictus（n = 59 UTM），池塘滑块Trachemys scripta（n = 471），常见的蜡嘴鸟Estrilda astrild（n = 1，275）和家鼠小家鼠（n = 4,043），分别用于两栖动物，爬行动物，鸟类和哺乳动物。记录的大多数外来物种都起源于非洲（33％），其次是南美（21％），亚洲（19％），北美（12％）和大洋洲（10％）。世界自然保护联盟（IUCN）将三十六种物种归类为濒危物种，即2种极度濒危（CR），6种濒危（EN），8种脆弱（VU）和20种近危（NT）。DataSet1中提供了种类图，还提供了R代码和GIS层，以便在获得新记录时对其进行更新。世界自然保护联盟（IUCN）将三十六种物种归类为濒危物种，即2种极度濒危（CR），6种濒危（EN），8种脆弱（VU）和20种近危（NT）。DataSet1中提供了种类图，还提供了R代码和GIS层，以便在获得新记录时对其进行更新。世界自然保护联盟（IUCN）将三十六种物种归类为濒危物种，即2种极度濒危（CR），6种濒危（EN），8种脆弱（VU）和20种近危（NT）。DataSet1中提供了种类图，还提供了R代码和GIS层，以便在获得新记录时对其进行更新。