Wetland Invasive Alien Plants - Thousand Islands

Park staff monitor invasive wetland plants at marsh monitoring sites in May-June each year (8 plots/year). In each wetland, pairs of 1 m x 1 m quadrats placed 2 m apart are sampled along 3 transects at 5 and 15 meters in wet meadow, emergent and submergent vegetation zones. The percent cover is recorded within each quadrat for 10 exotic invasive plant species including European Common Reed, European Frogbit and Purple Loosestrife.

Data and Resources

Additional Info

Field	Value
Last Updated	April 17, 2026, 18:13 (UTC)
Created	April 17, 2026, 18:13 (UTC)
contact_email	Josh.VanWieren@canada.ca
contact_person	{}
criticality_level	["educators", "government", "nongovernmental_organizations", "scientists", "students"]
data_dictionary	[]
geographic_scope	["3507"]
open_canada_collection	primary
open_canada_date_modified	2020-03-26 00:00:00
open_canada_date_published	2019-09-17 00:00:00
open_canada_keywords	{"fr": ["Espèces envahissantes", "Phragmites australis", "Hydrocharis grenouillère", "Salicaire pourpre", "Couvert en pourcentage", "Plantes exotiques", "Mille-Îles", "Ontario"], "en": ["Invasive Species", "Phragmites australis", "European Frogbit", "Purple Loosestrife", "Percent Cover", "Exotic Plants", "Thousand Islands", "Ontario"]}
open_canada_subject	["nature_and_environment"]
sensitivity_level	unrestricted
title_fr	Végétation envahissante des milieux humides - Mille-Îles
update_frequency	P1Y