Proceedings - Teaching and Learning Centre - Simon Fraser ...

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Fraser River Action Plan 3rd Research Workshop ∗ significance of contaminant exposure levels to sentinel species such as the dunlin; and, ∗ how are contaminants moving up the food chain. – Relevance of Fraser River estuary, relative to other estuaries, with respect to potential impacts on migratory species. – Relative effects of fresh water falling on mudflats or fields, and driving marine invertebrates down or terrestrial invertebrates up, and how important these effects are on birds’ behaviour. – Habitat loss: ∗ extent of habitat loss; ∗ implications for wildlife use and pollutant exposure; ∗ what habitat will be left for use by wildlife, now and projected; and, ∗ what will be pollutant exposure regimes, now and projected. – Identify all dunlin habitats during a life cycle, and establish the nature and use of each habitat type. – Samples to be collected for Rob MacDonald for PAH analyses; organochlorines also need to be looked at. – Take more samples at A0 and get horizontal distribution of silver to complement vertical profiles. – Benthic samples have been archived at A14 (reference site) — need to coordinate with someone else to analyze data this summer and thereby provide baseline information. • Focus on biogeochemistry and ecology of Fraser estuary mudflat and mouth of Fraser River. • Recovery of Iona Island Site (present vs. past azoic site) - review chapter - overview of recovery. Discussion Hall: Is there any info on vertical distribution near Iona? Harrison: Gordon has done some core samples. Hall: Has anybody talked about the application of stable isotopes, e.g., carbon? Harrison: Gordon found silver the best. Bendell-Young: Is the marsh a sink for contaminants? Harrison: With the little sampling we have done, I don’t think we can answer that. Hall: Check the FREMP research workshops. Unrecorded Speaker: Will the contaminants come back to the surface? Harrison: It will vary with texture. Winter storms affect this. Gray to Harrison: Dependence of migratory waterfowl on estuarine system - will there be any difficulty linking information from reference sites to other sites in the estuary. Shepherd: Bird movement can be tracked with radio. Gray: Will we ever get the location of the prey species? Shepherd: There is sediment data, but little vegetation data. Harrison: Can other birds be used? Shepherd: Dunlin are the most practical. Gray: Comment on contaminants/nutrients from Fraser? Page 325
Fraser River Action Plan 3rd Research Workshop Harrison: This could be an important source of nitrogen to the Strait, i.e., the Strait feeds the mudflat. Not much nitrogen comes down the river. We would have to look at nutrients. Levings: In favour of more work - we know little about certain species and loss of habitat. Harrison: At the BC/Washington conference, habitat loss was the main issue. Gray: Do mudflats act as a sink to STP metals. Bendell-Young: It is acting as a sink or trap, I think. Gray: It would be interesting to do a mass balance. Bendell-Young: Basic ecology of these birds helps a lot with other parts of biogeochemistry. Unrecorded Speaker: Is there enough manganese getting in (from gasoline) to increase manganese oxide movement in the river? Hall: This has to be studied - both in lab and field. There was a poster paper on this at SETAC conference. Page 326
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PROCEEDINGS 3rd RESEARCH WORKSHOP F
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TABLE OF CONTENTS Participants ....
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Development of a Citizen’s Monito
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Fraser River Action Plan 3rd Resear
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SESSION 1 PULP MILL EFFLUENT ISSUES
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SESSION 4 AGRICULTURAL ISSUES
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SESSION 5 BIOLOGICAL INDICATORS
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SESSION 6 ESTUARY ISSUES
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