Variation in biomass of submerged and emergent aquatic vegetation in the St. Lawrence River

The specific composition, biomass, vertical distribution and metal content of submerged and emergent aquatic plants in the St. Lawrence were evaluated. The riparian vegetation community of the St. Lawrence is characterized by the presence of extensive wetlands in the floodplain, a border of emergent plants and vast underwater meadows dominated by American wild celery (Vallisneria americana), a strong indicator species of metal concentration.

Supplemental Information

The St. Lawrence Action Plan (SLAP) 2011 to 2026 (see https://planstlaurent.qc.ca/en/home.html) is the latest Canada-Quebec Agreement on the St. Lawrence and builds on the four previous agreements implemented since 1988.

For more information on SLAP, please visit https://www.canada.ca/en/environment-climate-change/services/environmental-funding/ecosystem-initiatives/st-lawrence-action-plan.html

Supporting Projects:

St. Lawrence Action Plan (SLAP)

Data and Resources

Additional Info

Field Value
Last Updated April 17, 2026, 20:16 (UTC)
Created April 17, 2026, 20:16 (UTC)
contact_email enviroinfo@ec.gc.ca
contact_person {"fr": "Gouvernement du Canada; Environnement et Changement climatique Canada, 1-800-668-6767, enviroinfo@ec.gc.ca", "en": "Government of Canada; Environment and Climate Change Canada, 1-800-668-6767, enviroinfo@ec.gc.ca"}
criticality_level []
data_dictionary []
geographic_scope ["0"]
open_canada_collection primary
open_canada_date_published 2019-03-26 04:00:00
open_canada_keywords {"fr": ["Environnement", "végétation aquatique submergée (VAS)", "végétation aquatique émergente", "Vallisneria americana", "macrophyte", "métaux", "indicateur", "Plan d'action Saint-Laurent (PASL)"], "en": ["Environment", "submerged aquatic vegetation", "emergent aquatic vegetation", "Vallisneria americana", "macrophyte", "metals", "indicator", "St. Lawrence Action Plan (SLAP)"]}
open_canada_subject ["nature_and_environment"]
sensitivity_level unrestricted
title_fr Variation de la biomasse de la végétation aquatique submergée et émergente dans le fleuve Saint-Laurent
update_frequency as_needed