Update alien Scheldt checklist 2024

[sannegovaert]

We will release a new publication. I moved the data from the old spreadsheet to the new big spreadsheet with all checklists together, so it is easier to manage. Can you check wether the current checklist is up to date?

Most important is to check:

• In the old checklist, there are some comments. Check if these are still relevant and if yes, make changes in the new spreadsheet.
• Add the species that were introduced since the last publication.
• There is missing data. Please fill in as much as possible, especially for introduction pathway, date first observation , date last observation and native range.
  When date first observation is missing, this species cannot be used in the checklist indicator of TrIAS.
• Make sure all data is correct/updated.
• Be aware that occurence status is statement about the presence or absence of a Taxon within the country between the date of first observation and last date of observation. Boccardiella hamata is marked as absent, but no observation dates are provided. So this line is meaningless. It is better to set the status on present and provide last observation date. If last observation date is not the current year, it is thus currently absent.
• The vocabulary for introduction pathway has been updated. So we need to use the new terms. Please check if my suggestions are correct or need to be updated. In the spreadsheet, there is a tab introduction pathway with the short explanations of each term. For a more thorough description, please check the CBD guidance for interpretation. It also provides examples and decision trees. Here is the overview:

old pathway	new proposed pathway	comments
stowaway_hull_fouling	hullFouling
stowaway_ballast_water	ballastWater
escape_aquaculture	aquacultureMariculture
pet	pet
stowaway	otherTransport	Or choose one of the other options in the category transportStowaway
corridor_water	waterwaysBasinsSeas
contaminant_on_plants	contaminantOnPlants
release_fishery	fisheryInTheWild
stowayway_ship	hitchhikersShip