Mudge's Mills Wetlands

This wetland's name comes from the origin of Ayr, which began as three closely adjoined communities: Mudge's Mills, Jedburgh, and Nithvale.  The first settlement was in 1824 when Abel Mudge constructed a sawmill and flour mill at the intersection of Stanley and Northumberland, at the Nith River. The site became known as Mudge's Mills. What geological conditions led to the existance of this wetland? Firstly, a definition of a wetland is in order and the various ways that they may form. A wetland is an area of land that is either covered by water or saturated with water. The water is often groundwater, seeping up from an aquifer or spring. A wetland’s water can also come from a nearby river or lake. Seawater can also create wetlands, especially in coastal areas that experience strong tides. In conjunction with Ducks Unlimited and the Grand River Conservation Authority, Ayr Farmers Mutual rehabilitated a former inefficient wetland into a re-established, functional and improved wetlands area. This wetland is located in the Grand River Watershed. The Grand River watershed consists of all the land that drains into the Grand River through tributary creeks and rivers such as the Conestogo, Speed, Eramosa, Irvine and Nith rivers. The Grand River has Southern Ontario's largest watershed. 

What is a Wetland?

Wetlands are areas where water covers the soil, or is present either at or near the surface of the soil all year or for varying periods of time during the year, including during the growing season. Water saturation largely determines how the soil develops and the types of plant and animal communities living in and on the soil. Wetlands may support both aquatic and terrestrial species. The prolonged presence of water creates conditions that favour the growth of specially adapted plants and promote the development of characteristic wetland soils.

Wetlands vary widely because of regional and local differences in soils, topography, climate, hydrology, water chemistry, vegetation and other factors, including human disturbance. Canada's wetlands are diverse and take the form of swamps, marshes, bogs and fens. Wetlands are found from the tundra to the tropics and on every continent except Antarctica. Wetlands can be divided into two general recognized categories: coastal or tidal wetlands and inland or non-tidal wetlands.

Tidal wetlands are found along the Atlantic, Pacific, Alaskan and Gulf coasts. They are closely linked to estuaries where sea water mixes with fresh water to form an environment of varying salinities. The salt water and the fluctuating water levels (due to tidal action) combine to create a rather difficult environment for most plants. Consequently, many shallow coastal areas are unvegetated mud flats or sand flats. Some plants, however, have successfully adapted to this environment. Certain grasses and grasslike plants that adapt to the saline conditions form the tidal salt marshes that are found along the Atlantic, Gulf, and Pacific coasts. Mangrove swamps, with salt-loving shrubs or trees, are common in tropical climates, such as in southern Florida and Puerto Rico. Some tidal freshwater wetlands form beyond the upper edges of tidal salt marshes where the influence of salt water ends.

Non-Tidal wetlands are most common on floodplains along rivers and streams, in isolated depressions surrounded by dry land (for example, playas, basins and "potholes"), along the margins of lakes and ponds, and in other low-lying areas where the groundwater intercepts the soil surface or where precipitation sufficiently saturates the soil (vernal pools and bogs). Inland wetlands include marshes and wet meadows dominated by herbaceous plants, swamps dominated by shrubs, and wooded swamps dominated by trees.

Many of these wetlands are seasonal (they are dry one or more seasons every year). The quantity of water present and the timing of its presence in part determine the functions of a wetland and its role in the environment. Even wetlands that appear dry at times for significant parts of the year -- such as vernal pools-- often provide critical habitat for wildlife adapted to breeding exclusively in these areas.

Wetland Functions and Values

Wetlands represent one of the most important life support systems in the natural environment. Wetlands provide services including:

• A water filtration system – removing contaminants, suspended particles and excessive nutrients, improving water quality and renewing water supplies.
• An irreplaceable habitat – nesting, feeding and staging ground for several species of waterfowl and other wildlife such as reptiles and amphibians, and also for many species at risk.
• A high quality spawning and nursery area for many species of fish.
• Natural shoreline protection – protecting coastal areas from erosion.
• A reservoir – helping to control and reduce flooding through water storage and retention.
• A source of oxygen and water vapour – playing a vital role in the natural atmospheric and climatic cycles.
• Recreational activities – hiking, birdwatching and fishing.

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