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If you have any questions on the information presented, or require additional report data or attachments, please contact the
Ministry.
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The public play an important role in preventing the introduction and spread of AIS because human activities pose the greatest risk for AIS movement between in-land waterways. To address this, the CKISS engaged in various outreach activities and media directed at specific target audiences and the general public, raising awareness about aquatic invasive species through education and promoting the province-wide Clean Drain Dry, Dont Let it Loose, and PlantWise programs.
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Author: J. Vogel, K. Fraser, C. Harkness
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Old Reference Number: COL-F17-F-1204
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Old Reference System: FWCP Fish Wildlife Compensation Program - Columbia
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Date Published: Apr 2017
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Report ID: 52845
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Audience: Government and Public
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Priority waterbodies within the region were surveyed and monitored for the presence of invasive aquatic plants and dreissenid mussels. Substrate equipment used to detect the presence of juvenile and adult dreissenids was monitored monthly from July through September. A total of 62 plankton samples were collected from 17 waterbodies, and analyzed for any presence of dreissenid veligers (mussel larvae). Littoral surveys for invasive plants were conducted on Rosebud, Nancy Greene, Erie, Summit, Box, Fish, and Beaver Lakes. High risk areas such as boat launches, marinas, and recreation sites were surveyed on Slocan, Whatshan, and Upper and Lower Arrow Lakes.
Plankton samples were analysed using cross-polarized light microscopy in the laboratory by a certified analyst. All samples were negative for the presence of dreissenid veligers. Similarly, no juvenile or adult dreissenid mussels were detected on any of the substrate equipment.
No submerged aquatic invasive plants were discovered at any of the waterbodies surveyed in the course of this study and points sampled on Rosebud, Summit, Box, Fish, Beaver, Whatshan, Slocan and Arrow Lakes were free of invasive plants, both riparian and aquatic. At Nancy Greene and Erie Lakes, Fragrant Water Lily (Nymphaea odorata) was present, and at Mel Deanna Pond a newly reported infestation of the emergent plant was confirmed. At Nancy Greene Lake, this species has been treated since 2014, and its area has been greatly reduced. In Erie Lake, this species is expanding, with the discovery of two new patches. At Mel Deanna Pond, a large patch was discovered and the accessible portions were treated mechanically. Yellow Flag Iris (Iris pseudacorus) has been treated for several years at Nancy Greene Lake, and for the second year in a row, no plants have been found. In Erie Lake, the I. pseudacorus population is increasing, with a number of new clumps or individual plants detected. Watercress (Nasturtium officinale) was detected in the region for the first time. Near the Kootenay Lake community of Boswell, this plant was confirmed to be growing on both public and private land. Further surveys are required to determine the full extent of the colonization.
The existing populations of Myriophyllum sp. in the Kootenay-Columbia system may be hybridizing, which would make traditional methods of field identification more difficult. Furthermore, hybrid milfoils are more invasive than parental pure M. spicatum lineages.
Management and control measures should continue, or be implemented where they do not currently exist, in order to stop and reverse the continued expansion of populations of AIS present in the region. At current levels of infestation, mechanical and cultural removal methods are recommended due to their selectiveness and low ecological impacts. No large monotypic stands of AIS were detected to warrant the use of mechanical harvesters; however, this could change rather rapidly if no action is taken.
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Report Type
Subject
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Region - Kootenay |
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Vegetation - Plant Ecology |
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Vegetation - Riparian |
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