4.7.
Habitat Change and Problems In
the section The Watershed we looked at all of the impacts
on watercourses in our province. A few of these impacts
should be mentioned again with regards to wetlands,
ponds, and lakes. You may be able to correct or help
some of these situations during the course of your project.
- In some parts of Nova Scotia, a plant called Purple
Loosestrife is taking over wetland areas. This invasive
plant, although attractive, is of no use to wildlife
and tends to choke out more useful native plants. Loosestrife
can, in fact, take over an entire wetland area. Its
growth should be discouraged in wetlands and in private
gardens where seeds may be carried to nearby wetland
areas.
- Recreational vehicles such as ATV's and snowmobiles
can trample, compact, and damage the ground in these
sensitive, poorly drained areas. This can result in
changes in vegetation and ground structure. Ruts in
nearby wet areas can cause silt to enter the water during
rainy periods.
- In the past, humans have filled in or drained many
wetland areas so that the land can be used for construction,
farming, or other purposes. This has resulted in losses
of habitat, It has also increased the rate of storm
runoff, and by reducing water storage capacity, increased
the length and severity of droughts.
- Harvesting peat from bogs can alter the water flow
in nearby streams.
- In the past 30 years forest cutting around wet areas
often involved heavy machinery, which created rutting
and compaction of the soil. Now, forest workers are
more aware of the danger of silt getting into watercourses
and are asked to follow guidelines that limit how close
they can get to a wet area. New forest sustainability
regulations in the Province are having a positive effect
of stream protection. http://www.gov.ns.ca/natr/forestry/strategy/sustainabilityregs.htm
- Farmers should not plough to the edge of stillwater
areas; a greenbelt should always be left to prevent
too many fertilizers from moving into the system
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