Habitat 2000 / Learning About Wildlife
Revitalize
a Wetland
Whip
up a Wetland
Be
a Vernal Pool Lifeguard
Sustain
Salt-marsh Habitat
Revitalize
a Wetland
Wetlands
are Canada's crown jewels. Call them swamps,
sloughs, marshes, potholes, or ponds, these
inland and coastal treasures teem with permanent
wildlife and migratory species on the move.
Like a jewel in a crown, each wetland is priceless
in its own way.
A
salt-marsh, for instance, is a habitat powerhouse
full of highly nutritious plants. It nourishes
everything from protozoa to spawning fish. Untold
avian migrants rest and refuel here between
their breeding and wintering grounds.
Likewise,
inland wetlands, such as prairie potholes, provide
food and shelter for some of the richest, most
diverse webs of life on the planet. Countless
migrants, like Brant and snow geese, journey
from one coast to another via these stopovers.
The
loss of even one of these wetlands means that
many migrants may never complete their voyages.
Sadly, more than 65 per cent of Maritime salt-marshes,
40 per cent of Prairie wetlands, 70 per cent
of southern Ontario and St. Lawrence Valley
wetlands, and 70 per cent of Pacific estuary
wetlands have already vanished.
If
there's a wetland in trouble near you, now's
the time to take action.
- Mount a cleanup campaign. Use
garbage bags to collect glass, plastic, and
metal debris that could harm animals. Tread
lightly. Remember, you're trudging through someone's
home. Leave logs, rocks, and all other natural
objects behind as shelter for wetland creatures.
Post "No Dumping" signs.
- Restore wetland flora. A
good way to salvage wetlands is to transplant
native vegetation from healthy donor sites similar
to yours. Collaborate with local conservation
authorities. Use a shovel to uproot plants in
clumps with a few stems and soil surrounding
their roots. Do not remove entire bunches. Transplant
them to the new site as soon as possible. Dig
holes and push the roots about 5 cm below the
surface, packing soil around them, so they are
firmly anchored. For a list of suitable species,
see Aquatic Plants.
- Promote wetland-friendly agriculture.
Inform landowners that many waterfowl
breed on private farmland and that innumerable
migratory birds could not survive without rural
wetlands as stopover sites. Persuade them to
set aside wetlands as protected habitat. Promote
techniques that help farmers conserve naturally
vegetated banks, preventing the run-off of fertilizers
and pesticides into water bodies and minimizing
habitat damage. Urge ranchers to fence off wetlands
to limit cattle access.
- Monitor the spread of exotic aquatics.
Fight invasive species, like purple
loosestrife, zebra mussels, Eurasian ruffe,
and spiny water fleas. Pamphlets to help you
identify invasive species and monitor their
spread are available from regional wildlife
agencies.
- Make a media event of your project.
Sea ducks and sandpipers can't spread the word
about how much their survival depends on wetlands,
but you can! Contact a local newspaper or radio
or television station about your project.
Aquatic
Plants
| Species |
Range |
Site
Requirements |
Conservation
Value |
| Alders |
Coast to
coast |
Moist or
swampy ground |
Erosion control;
vegetation buffer; food and cover for shoreline
birds and mammals |
| Arrowhead |
Coast to
coast |
Areas with
a soft substrate, enabling plants to root
firmly |
Food and
cover for birds, mammals, fish, and amphibians |
| Bladderwort |
Y.T., N.W.T.,
Man., Ont., Que., N.B., N.S., P.E.I., Nfld. |
Bogs, ponds,
wet meadows, slow streams, and soggy shores |
Food and
cover for birds, mammals, and fish |
| Blue flag |
Man., Ont.,
Que., N.B., N.S., P.E.I., Nfld. |
Full sun
to partial shade; dry to wet conditions |
Hummingbird
and butterfly nectar source |
| Bulrush |
Coast to
coast |
Grows along
swampy grounds and shallow shores of ponds,
lakes, and streams |
Food and
cover for birds, mammals, fish, and amphibians |
| Cat-tails |
Coast to
coast |
Usually an
emergent plant, but can grow in waterlogged
soil |
Food and
cover for birds, mammals, fish, and amphibians |
| Pickerelweed |
Ont., Que.,
N.B., N.S., P.E.I., |
Usually an
emergent plant, but can grow in water a few
centimetres deep |
Habitat for
a wide variety of amphibians and reptiles;
food for many wildlife species |
| Pondweed |
Coast to
coast |
Slow-flowing
or still waters |
Food source
for mammals, waterfowl, and other birds. |
| Sedge |
Coast to
coast |
Grows in
wet meadows and near the shore of ponds, bogs,
and lakes |
Food and
cover for lowland birds, mammals, and fish |
| Spike rush |
Coast to
coast |
Grows in
wet meadows and near the shore of ponds and
lakes |
Food for
moose, beaver, muskrat, elk, deer, bobwhite,
grouse, and waterfowl |
| Water-lily |
Coast to
coast |
Grows in
ponds and quiet waters |
Food and
cover for semiaquatic mammals, fish, and amphibians |
| Wild rice |
Man., Ont.,
Que., N.B., N.S., P.E.I. |
Quiet fresh
or brackish waters and muddy shorelines |
Food and
cover for birds, mammals, and fish |
Whip
up a Wetland
Wetlands include, among other waterlogged wonders,
swamps, fens, marshes, muskeg, peatbogs, and
potholes. Countless species, from mallards to
mud puppies, mate, lay eggs, hatch, swim, hunt,
and grow in these habitats. Wetlands act as
filters by breaking down sewage and harmful
contaminants, leaving clean soil and water behind.
Common cat-tails and bulrushes absorb toxic
metals such as mercury and lead. Wetlands soak
up rain and snow like sponges and help to prevent
erosion and flooding.
Creating a mini-wetland in your schoolyard
is surprisingly simple. It may be your key to
attracting a host of wet and wild creatures.
- Choose a likely location. Your school grounds
may already have a low-lying soggy spot that
never entirely dries up. Consult with maintenance
staff to see if weeping tiles or pipes have
been laid to drain the "problem" site. If so,
seek permission to have them removed. Then let
the wetland work its wonders.
- If there are no naturally wet areas in your
schoolyard, create your own. If possible, pick
a spot in partial shade.
- Outline the shape of the wetland you want
with a length of twine or garden hose. Any size
is worthwhile, depending on space available
and the energy of volunteer diggers. Even a
small wetland will add surprising wildlife diversity.
- Remove any sod and dig a hole 30 to 90 cm
deep.
- Line the hollow with a sturdy plastic sheet.
If your area gets a lot of rain, puncture the
liner in several places to allow slow drainage.
If your site is a naturally soggy one, you needn't
put down plastic at all.
- Layer 5 cm of pebbles on top of the liner,
then 5 cm of damp peatmoss and some roughly
chopped sod. Make sure the peatmoss feels damp
when you open the bag. It won't work if it's
crumbly and dry.
- Now for the plants. Always use native wetland
species. Don't collect them from the wild unless
an area is slated for development. Otherwise,
purchase plants from a reputable nursery. Wildflowers
that thrive along the edges of moist areas include
marsh marigold, cardinal flower, blue flag,
pickerel weed and bottle and closed gentian.
You can also plant a moisture-loving shrub or
two, such as red-osier dogwood or buttonbush,
along the edges of your little wetland. For
a list of suitable species, see Aquatic
Plants.
Be
a Vernal Pool Lifeguard
Vernal
pools are temporary wetlands formed in depressions,
thanks to rain and melting spring snow. Some
are puddle-sized. Others, like prairie potholes,
are relatively large. These short-lived soggy
spots last anywhere from a few days to three
or four months before drying up. Yet they are
critical to the life cycles of many amphibians
and invertebrates.
The
imperilled mountain dusky salamander and great
basin spadefoot toad both rely on vernal pools
to reproduce. A host of other wildlife, like
tiny, transparent fairy shrimp and water striders,
also live part-time in vernal pools. As the
water dries up, some inhabitants simply move
on. With luck, tadpoles will now be tiny toads,
ready to hop on to the next stage of their lives.
Survival is a race against time for inhabitants
of vernal pools. But the absence of predators,
such as fish and reptiles found in permanent
water bodies, makes the rush worthwhile.
To
add to the challenge, these critical habitats
are being paved over by spreading suburbs. Larger
vernal pools, such as prairie potholes, are
often considered wasted land and are, therefore,
drained and cultivated. Elsewhere, vernal pools
are "improved" by dredging and fish-stocking.
Cattle and all-terrain vehicles can crush inhabitants
and churn up mud, which clogs the gills of salamander
larvae and developing tadpoles.
Vernal pools are not protected or even acknowledged
by the Canadian Wetland Classification System.
You can be a huge help to aquatic creatures by
educating yourself and the public about these
special spots. Ask naturalists and biologists
for more information. Visit a vernal pool this
spring. Prepare and distribute fact-sheets alerting
landowners, developers, schools, and community
groups about the importance of these habitats.
Sustain
Salt-marsh Habitat
Salt-marshes
are among the most productive habitats on Earth.
These coastal wetlands form where nutrient-laden
freshwater and salt water blend into a rich
biological stew. Plant life thrives in salt-marshes,
filtering pollutants from the water and providing
food and cover for a plethora of wildlife, from
single-celled protozoa to large mammals.
These
habitats also serve as spawning grounds and
nurseries for myriad species of fish and shell-fish.
Migratory birds like geese, ducks, and shorebirds
are utterly dependent on chains of salt-marshes
for stopover points, where they can refuel travelling
between their nesting and winter grounds. All
these species intermingle in an intricately
woven food web.
The
most vital element in a salt-marsh is plant
life. Specialized grasses tolerate high concentrations
of salt and the impact of rising and falling
tides; their roots bind loose mud into a mass,
collecting and holding organic material by forming
a network. They also provide many wildlife species
with food and cover. Sad to say, they are in
trouble -- literally losing ground. Natural
forces like high waves and tidal surges, human
impacts like agriculture and urban and industrial
expansion, and rising sea levels due to global
warming are killing and uprooting vegetation
and wearing away muddy soil. The continuing
loss of salt-marshes puts migratory waterfowl
and many other species in jeopardy.
Since plants play such a critical role in these
ecosystems, the best way to help sustain salt-marsh
habitat is to provide supplemental planting. Choose
native plants adapted to life in the salt-marsh
environment -- ones that anchor muddy soil while
providing ample food and shelter for a variety
of species. See Restore
an Aquatic Plant Community for more information
on planting techniques. Your choice of plants
will vary from region to region, as indicated
in the following chart:
Salt-marsh
Planting Chart
|
Alkali
grasses
|
East
and West Coasts
|
|
Arrow-grass
|
East
and West Coasts
|
|
Baltic
rush
|
West
Coast
|
|
Black
grass
|
East
and West Coasts
|
|
Brass-buttons
|
East
Coast
|
|
Cow
clover
|
West
Coast
|
|
Ditch-grass
|
East
and West Coasts
|
|
Dodder
|
West
Coast
|
|
Devil's-club
|
West
Coast
|
|
Gumweed
|
West
Coast
|
|
Hairgrass
|
West
Coast
|
|
Hedge-bindweed
|
East
Coast
|
|
Inkberry
|
East
Coast
|
|
Glasswort
|
East
Coast
|
|
Low
bulrush
|
West
Coast
|
|
Red
fescue
|
East
and West Coasts
|
|
Redtop
|
East
and West Coasts
|
|
Reeds
|
East
and West Coasts
|
|
Salt-marsh
bulrush
|
East
and West Coasts
|
|
Salt-meadow
grass
|
East
Coast
|
|
Salt
rush
|
West
Coast
|
|
Salt-water
cord-grass
|
East
Coast
|
|
Sand-spurrey
|
East
and West Coasts
|
|
Sea-blite
|
East
Coast
|
|
Seacoast
bulrush
|
East
and West Coasts
|
|
Sea-lavender
|
East
Coast
|
|
Sea-milkwort
|
East
and West Coasts
|
|
Seaside
gerardia
|
East
Coast
|
|
Seaside
goldenrod
|
East
Coast
|
|
Seaside-plantain
|
East
and West Coasts
|
|
Sedges
|
West
Coast
|
|
Slough-grass
|
East
and West Coasts
|
|
Spearscale
|
West
Coast
|
|
Starwort
|
East
and West Coasts
|
|
Swamp
rose-mallow
|
East
Coast
|
|
Western
dock
|
West
Coast
|
|
Winterberry
|
East
Coast
|
|
Wood-sage
|
East
Coast
|
|