Hansen Sara E, Cahill Blake C, Hackett Rachel A, Monfils Michael J, Goebel Ryan T, Asencio Shannon, Monfils Anna
Central Michigan University Earth and Ecosystem Science Program, Mount Pleasant, Michigan, United States of America Central Michigan University Earth and Ecosystem Science Program Mount Pleasant, Michigan United States of America.
Michigan State University Extension Michigan Natural Features Inventory, Lansing, Michigan, United States of America Michigan State University Extension Michigan Natural Features Inventory Lansing, Michigan United States of America.
Biodivers Data J. 2022 Feb 9;10:e77492. doi: 10.3897/BDJ.10.e77492. eCollection 2022.
European frog-bit ( L.; EFB) is a free-floating aquatic plant invasive in Canada, the United States and India. It is native to Europe and northern and western Asia and is believed to have first been introduced to North America in Ottawa, Ontario in 1932. It has since spread by way of the St. Lawrence River and connected waterways to southern Ontario and Quebec and parts of the northern United States. Invasive European frog-bit occurs in freshwater coastal wetlands and inland waters, where it can form dense mats that have the potential to limit recreational and commercial use of waterways, alter water chemistry and impact native species and ecosystems. Data on the past and present distribution of this invasive species provide geospatial information that can be used to infer the pattern of invasion and inform management and monitoring targeted at preventing secondary spread. Our EFB dataset contains 12,037 preserved specimen and observation-based occurrence records, including 9,994 presence records spanning two Canadian provinces and ten U.S. states and 2,043 absence records spanning five U.S. states. The aggregated EFB dataset provides a curated resource that has been used to guide a Michigan management strategy and provide information for ongoing efforts to develop invasion risk assessments, species distribution models and decision-support tools for conservation and management.
Specimen-based and observation-based occurrence data were accessed through nine digital data repositories or aggregators and three primary sources. Twenty-six percent of the data are new records not previously published to a data repository or aggregator prior to this study. We removed duplicate data and excluded records with incorrect species identifications. Occurrence records without coordinates were georeferenced from recorded locality descriptions. Data were standardised according to Darwin Core. This aggregated dataset is the most complete account of EFB occurrence records in its North American invasive range.
欧洲莕菜（Hydrocharis morsus-ranae L.；EFB）是一种漂浮水生植物，在加拿大、美国和印度均有入侵。它原产于欧洲以及亚洲北部和西部，据信于1932年首次在安大略省渥太华被引入北美。此后，它通过圣劳伦斯河及相连的水道扩散至安大略省南部、魁北克省以及美国北部部分地区。入侵性欧洲莕菜生长在淡水沿海湿地和内陆水域，可形成密集的草垫，有可能限制水道的娱乐和商业用途，改变水化学性质，并影响本地物种和生态系统。关于这种入侵物种过去和现在分布的数据提供了地理空间信息，可用于推断入侵模式，并为旨在防止二次传播的管理和监测提供信息。我们的欧洲莕菜数据集包含12,037条保存标本和基于观测的出现记录，其中包括跨越加拿大两个省份和美国十个州的9,994条存在记录，以及跨越美国五个州的2,043条缺失记录。汇总后的欧洲莕菜数据集提供了一个经过整理的资源，已被用于指导密歇根州的管理策略，并为正在进行中开发入侵风险评估、物种分布模型以及保护和管理决策支持工具的工作提供信息。
基于标本和基于观测的出现数据通过九个数字数据存储库或聚合器以及三个主要来源获取。26%的数据是此前未发布到数据存储库或聚合器的新记录。我们去除了重复数据，并排除了物种鉴定错误的记录。没有坐标的出现记录根据记录的地点描述进行了地理定位。数据根据达尔文核心标准进行了标准化。这个汇总数据集是北美入侵范围内欧洲莕菜出现记录最完整的记录。
