In Southern Ontario, we’re very fortunate to have approximately 560,800 hectares of wetlands. These important natural heritage features are home to a wealth of species such as fish, birds, mammals, amphibians and insects – including many species at risk. Wetlands also act as filters to clean our drinking water by absorbing excess nutrients like phosphorus. They also act like natural pieces of our infrastructure in protecting properties from flooding as they soak up and slowly release stormwater runoff.
Despite their ecological and hydrological importance, the protection of wetlands in Ontario is often at odds with urbanization, agriculture, and other types of development. Since pre-settlement time, we have lost 72 per cent or 1.4 million hectares of the wetlands in southern Ontario. Historically, wetlands were viewed as wastelands and were drained for other land uses such as crops, livestock pastures and urban development. Unfortunately not much has changed today. In 2010, Ducks Unlimited Canada released a report, Southern Ontario Wetland Conversion Analysis, which showed that wetland loss is continuing at an alarming rate.
While there are some policies in Ontario aimed at protecting wetlands, there are many loopholes that need to be fixed. For example, the Provincial Policy Statement (2005) restricts development and site alteration in provincially significant wetlands designated by the Ministry of Natural Resources. Unfortunately, this protection only applies to wetlands that have been evaluated and designated, and many remain unevaluated. Even if a wetland is designated as provincially significant, the Provincial Policy Statement allows municipal drains and infrastructure like wastewater and water systems, highways, and roads to be built within its boundaries. Local conservation authorities also regulate development and site alteration in and around wetlands, regardless of their significance, to protect life and property from flooding and erosion hazards. Unfortunately, provincial funding to conservation authorities has not increased since the 1990s, which severely constraints their ability to maintain existing levels of flood protection and to deal with emerging threats like climate change.
Today is World Wetlands Day – the date on which the international Ramsar Convention on Wetlands was signed in 1971. The treaty is a framework for countries to conserve and plan for the “wise use” of all the wetlands in their territories and designated Wetlands of International Importance. Canada is a signatory to this convention and eight Wetlands of International Importance are located in Ontario. Aichi Biodiversity Target 5 under the International Convention on Biological Diversity, to which Canada is also a signatory, calls upon governments to reduce the rate of loss of all natural habitats at least in half and where feasible, close to zero by 2020. In my recent special report, Biodiversity: A Nation’s Commitment, an Obligation for Ontario, I identified that the constitutional responsibility for meeting the Aichi Biodiversity targets lies with Ontario and the other provincial governments. Today, and every day, we should remember how valuable Ontario’s wetlands are. The provincial government should ensure that the small fraction of wetlands that remain in southern Ontario are conserved and protected and that the rate of loss is reduced or eliminated altogether.




