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Contrary to this trend, invasive cattail dominates several outer estuary sites.

This reflects an eastward increase in the dominance of non-native plants, including invasive species such as yellow flag iris, purple loosestrife, and reed canary grass.

The dominance of native vegetation declined at an average rate of one per cent per kilometre upriver in created marshes.

While protective infrastructure, specifically debris fencing and offshore structures such as marina docks and log storage booms possibly mitigate recession, sites built in the North Arm of the Fraser River Estuary averaged 12 per cent more recession, and recession increased at an average rate of 1 per cent per kilometre upstream among sites.

Site design, boat wake, and the impact of grazing by Canada geese feeding are emphasized however, altered sediment processes, sea-level rise, shading, and monitoring effectiveness are all possible causes, and warrant further investigation.

There is no one factor that can determine the loss of marsh recession.

Marsh recession was observed in 40 of the 78 surveyed created marshes (51 per cent), resulting in an estimated loss of 23,553 square metres, or 9.3 per cent of the total created marsh area sampled.

These data were used to model potential causes behind marsh recession, dominance of native plant species, and species richness in these sites. Among their findings detailed in their report, entitled Factors Influencing the Persistence of Created Tidal Marshes in the Fraser River Estuary: Starting in spring 2021, local wetland plant ecologist Daniel Stewart and DUC conservation technicians embarked on a study to assess 27 marsh restoration projects and nine natural reference marshes in the Fraser River Estuary and pooled these results with similar data from a 2016 report.

However, reports have shown that the success of these restoration projects varies.Ī new, in-depth report by Ducks Unlimited Canada (DUC)-the most comprehensive analysis of tidal marsh creation projects in the Fraser River Estuary to date-sheds light on factors that lead to some projects being more successful than others. In some cases, the nature of the item means that it is non-returnable, for example, due to hygiene/health and personal care/wellness/consumable nature of the product.Surrey, B.C., Ma(GLOBE NEWSWIRE) - Over the past 40 years, more than 100 tidal marsh restoration projects have been constructed in the Fraser River Estuary to mitigate the loss of habitats from human activities and to maintain the ecological integrity of the area. Office Products and Wireless Returns Policy

Mud river ducks unlimited full#

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