00000nam 2200000zi 4500 9.920985 CaOODSP 20250117130435 m o d f cr |n||||||||| 230123e19811130pk ab ob f|0| 0 eng d CaOODSP eng rda CaOODSP n-cn-on En37-573/1981E-PDF Aerial survey of nuisance aquatic plant infestation in the Upper St. Lawrence River / Beak Consultants Limited. Burlington, Ontario : Environment Canada, Inland Waters Directorate, Canada Centre for Inland Waters, 30 November 1981. 1 online resource (ii, 13, [32] pages) : illustrations, maps text txt rdacontent computer c rdamedia online resource cr rdacarrier Digitized edition from print [produced by Environment and Climate Change Canada]. "A report prepared for Environment Canada, Inland Waters Directorate." "An aerial survey was made of the Upper St. Lawrence River to identify areas infested by aquatic plants. These areas were designated as having light, medium or heavy densities. Aerial photographs were taken with regular colour and infrared film types to examine the suitability of these films for plant area identification. Plants were found to grow in significant densities in most shallow areas in the study area except in the Bay of Quinte. High turbidity probably limits plant activity in the Bay of Quinte. Plaints impair recreational and navigational use within the Thousand Islands area and the St. Lawrence Seaway"--Summary, page 1. Aquatic plants Saint Lawrence River. Invasive plants Saint Lawrence River. Plantes aquatiques Saint-Laurent (Fleuve) Plantes envahissantes Saint-Laurent (Fleuve) Canada. Environment Canada. Inland Waters Directorate, issuing body. Canada Centre for Inland Waters, issuing body. Beak Consultants, consultant. PDF 7.13 MB https://publications.gc.ca/collections/collection_2025/eccc/en37/En37-573-1981-eng.pdf