Zusammenfassung der Ressource
Alaska Wetlands
- other birds
- birds of prey aka raptors
- powerful curved bills
- sharp talons
- birds, fish,
mammals,
amphibians,
crustaceans
- some perch near
freshwater wetlands
other soar high or low
over them
- eagles, hawks falcons owls
- bald eagles and
ospreys common
along coast of
alaska
- buteos "soaring
hawks" and owls
hunt by
perching
- northern harrier "marsh hawk"
Anmerkungen:
- the water cycle
- amphibians
- amphibians
breath and
absorb water
through their
skin.
- all amphibians
produce poisonous
skin secretions
- keep the skin moist,
prevent bacteria,
molds, and diseases
from entering the
body.
- frogs can see in
almost all
directions
- start out their lives in water, breathing
through hills, and eventually develop
lungs, which enable them to exist on
land.
- cold blooded: they
cannot form their own
body heat, they take it
from the enviroment
- wood frogs life cycle
- 1. they begin their lives as tadpoles
- 2. mature tadpoles have legs
- 3. by mid summer the tadpoles has
developed into a young froglet
- 4. wood frogs freeze solid during the winter
- 5. frogs breed as soon as they thaw out
- amplexus
- male frog crasps to
the female fertlizing
eggs, as she lays
2000-3000 eggs in a
big jelly like
formation. they
hatch 4-8 days
depending on the
temp
- water birds
- water fowl
- ducks
- courtship rituals
- different mates
every year
- diving ducks (divers)
- clams, insects,
crustaceans,
fish, deep
plants
- large mashes and lakes
- short pointed wings
Anmerkungen:
- because of their wings they need a long space to take off
- can dive 150ft
- inland, canvasback,
redhead, ring-necked, and
scaup
- seaducks, eiders, soters,
long-tailed, harleguin,
goldeneyes, bufflehead, and
mergansers
- puddle ducks (dabblers)
- insects, crustaceans
on the surface of
water
- broad wings
Anmerkungen:
- means they can take of quickly
- small ponds
- mallard, pintail,
green-winged
teal, american
wigeon,
gadwalls,
northern
shoveler
Anmerkungen:
- Mallard: most common type of duck in north america
- geese, swans
- mate for life
- molt once
per year
Anmerkungen:
- molt means to replace feathers once a year.
- adapted for
walking and
grazing on land
- loons
Anmerkungen:
- they eat fish, hense the sharp bills and webbed feet
- sit low in the water
- sink straight down
- they cary their
young on their
backs
- webbed feet
and sharply
pointed bills
- grebes
- long skinny necks
- dive forward
- fresh water lakes,
ponds, and slow
moving rivers
- lobed toes
- carry young on back
- western
pied-bills in
southearn
alaska
- shore birds and
waiters
- long legs,
shorts tails,
sharp pointed
wings
- bristle-thighed curlew,
black turnstone, western
sandpiper, nest only in
alaskas wetlands
- dowitchers, godwits,
plovers, turnstones,
sandpipers, curlews,
snipe, phalaropes, yellow
legs
- seabirds
- webbed
feet
- sharp bills
- gulls, terns,
and
cormorants
- mammals
- beavers
- slow river current
- enhance the
growing
conditions for
willows
- remove the
competition of larger,
older trees
- great moose habitat
- the ponds they
make from
biulding dams,
are good
spawning
habitats
- moose
- submerge their heads to
obtain mineral-rich
aquatic plants that help
replace calcium lost
through nursing or antler
development
- feed in ponds
- river floodplains
provide abundance of
willows, which is a
favorite of moose
- nuskrats
- aquatic plants, roots, stems,
cattails,lilies, sedges, and
grass, mussels, shrimp, and
small fish
- keep an air open in
the ice to access
their cache
- otters and mink
- forage on both
land and fresh and
salt water
- mink prefer streams, ponds,
beaches and marshes
- advantage of an abundance
of mice or hares
- polar bears
- classified as
marine mammals
- wetlands and shores
are important
foraging grounds for
polar bears in
Summer when seals
are out of reach
- find and eat bird
eggs, rodents, and
berries
- fishes use of wetlands
- nursery areas for many fish species
- streams, rivers,
and riparian
wetlands produce
the millions of
salmon
- riparian wetlands are ecpecailly
important to small fish like
sculpins, young freshwater fish,
and juvenile salmon.
- riparian wetlands provide an
abundance of envertibrate, food,
and protection of strong currents
- aquatic invertebrates
- many aquatic invertebrates can be
used as an indicator of stream or
wetland health, as some are very
tolerant of pollution and low
oxygen conditions, and some can
only inhabit clear, well oxygenated
waters
- grouped according to their ecosystem and feeding functions
- some like dragonfly larvae
and the predacious diving
beetle are predators
consuming other
invertebrates, tiny fish and
even tadpoles
- shredders: like some
stonefly larva, break
leaves and other
particulates greater then
1mm in size into smaller
peices
- youngsters dominate:
macroinvertebrates in the
water are the larva form of
terrestrial animals, and are
very different looking from
their adult counterparts