Sydenham River Species at Risk
by Dale Hainer
TFN Reporter
The Sydenham River is deemed
by many in the scientific community to be a biological treasure, and many
of its inhabitants are in severe danger. That was the message brought out
by the Sydenham River Recovery Team at a recent meeting in Dresden aimed
at developing a recovery strategy for the Sydenham River.
"The recovery plan is aimed
at preventing the extinction of eight endangered fish species, five mussel
species and one turtle that inhabit the Sydenham River", explained Recovery
Team member Al Dextrase of the Ontario Ministry of Natural Resources. These
species at risk have been Nationally listed as endangered or threatened
by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC)
. "Studies have found 80 species of fish and 34 species of freshwater mussels
inhabiting the Sydenham and some of these species are very rare and some
are found in only a few places in the world".
Many of the rare species
of fish, amphibians and mussels in the Sydenham are sensitive to environmental
change and act as "health monitors" in the Sydenham ecosystem. The loss
of even one of these species could signal a reduction in the quality of
water in the river. As well, each organism in any system is hereditarily
important to that system. A single loss could have effects on each and
every species in the river. The good news is that many of the endangered
species are still present in the river and protecting and improving habitat
will help insure their long term survival.
The Sydenham watershed drains
a vast area of lowland. Historically, that drainage area was made up of
swamp and forest. At the turn of the century, the land was harvested of
trees and cleared for farming. To ease the large swamps that lay on the
land and across proposed farms, intricate series' of ditches, spillways
and tilling systems were installed to facilitate the quick passage of water
off the land. In more recent times, populations have grown along the Sydenham
corridor including communities such as Wallaceburg, Dresden, and Strathroy.
All these communities and some smaller ones release their treated waste
water in the river.
According to Recovery Team
member Muriel Andreae, with the St Clair Region Conservation Authority,
"Farming and population growths have added turbidity to the water. Mid
depth pollutants such as silt, nutrients and chlorides make the Sydenham
its creamy coffee colour. Quick runoffs from rainfall, livestock access
to the water, low level tractor crossings, forced channelization and narrow
bridges all add to the siltation problem while higher than Provincial Standard
levels of nutrients comes from farms and sewage treatment plants". She
went on to explain that there has been "significant erosion damage all
along the river and chloride levels in the north branch of the Sydenham
were five times above lethal levels at times due to oil well water from
the Petrolia region being pumped into storm drains. That practice has since
been halted and chloride levels are now near normal".
As problems are identified,
remedies for often deadly symptoms can often easily be found. The Sydenham
River Recovery Team is determined to address the problems of contaminants,
pollutants, exotic species introductions and ecological changes that have
a negative affect on the Sydenham river and watershed. A number of public
meetings has been set up including the recent one in Dresden and are aimed
at making the general public aware of the Species at Risk in the
Sydenham as well as encouraging public input in recognizing additional
problems with the watershed and possible remedies. To date forty two additional
concerns have been pinpointed by the public meeting and consultation process.
Additional meetings will be held in Petrolia and Strathroy.
"We hope to have a draft
recovery plan by late sumer of 2001 and an official plan by this fall"
said Dextrase.
Interested parties wishing
to receive a summary of the background information and recommendations
are encouraged to contact the SCRCA at 519 245 3710 or can visit their
website at www.scrca.on.ca/
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