New Aquatic Species Added to Endangered Species List

By Water Canada 07:39AM May 16, 2018



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The Committee on the Status of Endangered Wildlife in Canada (COSEWIC) added the Midland Painted Turtle to a growing list of species found to be at risk in the region between Toronto and Windsor, Canada’s most species-rich biodiversity hotspot.

Painted Turtles take about 10 years to mature, and lay small numbers of eggs. This means that even small increases in adult deaths can lead to large declines in population size.

Although the Painted Turtle still thrives in some regions of Canada, the increasing numbers of turtles killed by vehicles and the historical loss of 70 per cent of southern Ontario wetland habitat led COSEWIC to conclude that the species is of Special Concern. Every one of Canada’s ten native freshwater turtle species is now at risk in at least some part of the country.

The species is found in the shallow waters of ponds, lakes, sloughs, and slow-moving stream reaches. Suitable wetlands have muddy substrates, an abundance of emergent vegetation, and numerous basking sites. Chrysemys p. bellii habitat also includes riparian zones bordering wetlands and females nest up to 150 metres away from water, in loose, warm, well-drained soils.

Over a quarter of Canada’s at-risk species—217 in total—live, or lived, in the heavily altered landscape of southwestern Ontario. Thirty-three have not been seen for decades.

At the Windsor meeting, COSEWIC members witnessed first-hand many threats to species, but also saw promising ways to address the problems. Covered in restored tallgrass prairie, Ontario’s largest eco-passage allows threatened species to move safely over the new Windsor-Essex Parkway.

“We need to continue to protect the few natural places we have left, and we must also be proactive and creative in how we reconnect them one to another,” said Karen Cedar, Ojibway Prairie Complex naturalist.

Dr. Trevor Pitcher, director of the Freshwater Restoration Ecology Centre at the University of Windsor, highlighted habitat restoration of the Detroit River for local Lake Sturgeon, a threatened species assessed by COSEWIC in 2017: “We put down ten tons of gravel and the sturgeon immediately started laying eggs – they had been waiting almost a century.”

COSEWIC assessed a total of 44 wildlife species from across Canada at the April 2018 Species Assessment Meeting. Other examples (with assessment status) include:

COSEWIC’s Assessment and Status Report on the Western Painted Turtle Chrysemys, picta bellii can be accessed online.

Further details on all wildlife species assessed at this meeting can be found on the COSEWIC website.

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