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008230123e19811130pk ab   ob   f|0| 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
043 |an-cn-on
0861 |aEn37-573/1981E-PDF
24500|aAerial survey of nuisance aquatic plant infestation in the Upper St. Lawrence River / |cBeak Consultants Limited.
264 1|aBurlington, Ontario : |bEnvironment Canada, Inland Waters Directorate, Canada Centre for Inland Waters, |c30 November 1981.
300 |a1 online resource (ii, 13, [32] pages) : |billustrations, maps
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
500 |aDigitized edition from print [produced by Environment and Climate Change Canada].
500 |a"A report prepared for Environment Canada, Inland Waters Directorate."
520 |a"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.
650 0|aAquatic plants|zSaint Lawrence River.
650 0|aInvasive plants|zSaint Lawrence River.
650 6|aPlantes aquatiques|zSaint-Laurent (Fleuve)
650 6|aPlantes envahissantes|zSaint-Laurent (Fleuve)
7101 |aCanada. |bEnvironment Canada. |bInland Waters Directorate, |eissuing body.
7102 |aCanada Centre for Inland Waters, |eissuing body.
7102 |aBeak Consultants, |econsultant.
85640|qPDF|s7.13 MB|uhttps://publications.gc.ca/collections/collection_2025/eccc/en37/En37-573-1981-eng.pdf