IMIS

Fieldwork was mostly done by bike, surveying the river- and canalbanks. The goal was to have an overview, not to have an exhaustive mapping of all alien plants near waterways.
Study Extent: In 2011, ca. 1250 kilometers were screened (not in detail) for the presence of invasive alien plants, as defined by the ISEIA-protocol. 23 invasive alien plant species were recorded, of which 13 belong to the ‘black list’ (species with the highest biological impact). The presence of invasive alien plants spanned 74 kilometers of river or canal banks (not taking overlap between species into account), 48 kilometers of which were occupied by black-list species.
Method step description:

1. The source data for this dataset are stored in the INBO NBN database.
2. Create two SQL views to transform the data to Darwin Core (Events and Occurrences). These queries are available on GitHub at https://github.com/inbo/data-publication/tree/master/datasets/invasive-plants-waterways-occurrences.
3. These views are connected to the INBO IPT and documented with metadata.
4. The dataset is published and registered with GBIF.