View ECCC Data Mart (French) (French, HTML)

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Publisher-reported update

2019-03-22

The subjects of this study – the St. Lawrence (river, estuary and gulf) and the Ottawa and Richelieu rivers – present a range of natural shoreline habitats that are conducive to the flourishing of avian, aquatic and terrestrial fauna. Avian fauna, particularly migratory birds, use wetlands as feeding and resting areas. These wetlands develop primarily in bays that are sheltered from currents and their flora varies depending on water salinity and the presence or absence of tides. In the lowlands of the St. Lawrence, which are washed by fresh and brackish waters, wetlands contain submerged and emergent aquatic plants in areas unaffected by tidal action and are dominated by the American bulrush in areas where tidal variations uncover muddy sediments. They develop particularly well in areas where water in shallow, as in the bays of the Ottawa River, the shores of the Richelieu, and in the lakes, bays and island shores of the St. Lawrence. In salt water, they can be found in the fine deposits in the high areas of coves, bays and river mouths sheltered from violent seas. In the St. Lawrence estuary, low wetlands are dominated by Spartina alterniflora communities, while higher wetlands…

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