2. Information Search
• You are to work individually to search for another
example of where the introduction of a new
organism affected the survival of another.
• Present your findings in any way you like. (E.g.
powerpoint, word, glog, song, rap, picture, etc)
• Save your work in the projects folder. Name the file
as your name (e.g. Alex.ppt)
• Please remember to include your information
sources.
3. Falcons
• Since falcons arrive in New Zealand in
1230 to 1300, the number of lizards,
earthworms, frogs, and insects started to
decrease. They hunt by using their tiger-
sharp claws. Falcons act as a predator
to the species mentioned earlier. Falcons
can spot their prey from afar, since they
have very good eyesight.
4. Rats
You may think that rat’s are harmless, but
you are very wrong. In the country of New
Zealand, Rat’s are a PEST. The rats of New
Zealand has done immense damage to
the native New Zealand bush. These rats
were stowaways on canoes or ships. These
rats ate Bird Nest and even got a chance
to make a Speech in front of the Press(
bottom pictures ).
5. + =
Polynesian Rat
This little tiny rat had played a role in the deforestation of
Easter Island by eating the nuts of the local palm tree,
preventing regrowth of the forest. Polynesian rats are like
most rats, and are climbers, often hiding in trees. In winter,
they strip bark for consumption and satisfy themselves with
plant stems.
Information from wiki pedia
Isaac ong
7. •
Possums is a threat to New Zealand
The Possums is decreasing the
population of dingoes, bush fires and
less palatable vegetation as they eat
them. In New Zealand there are no
predators and lots of very palatable
vegetation as a result they have a huge
impact on New Zealand ecosystems.
8. Feral foxes in Australia
The first introduction occurred in 1845 near Keilor, Victoria.
The spread of red foxes across southern Australia
coincided with declines in the distribution of several
medium-sized ground-dwelling mammals, including Brush-
tailed bettongs
, burrowing bettongs, rufous bettongs, Tasmanian
bettongs, bilbye, numbats, bridled nailtail wallabies and
quokkas. Most of these species are now limited to islands
where red foxes are absent or rare. Semi-arboreal species
affected by fox predation include brush-tailed and
western ringtail possums
9. Green crab a crushing blow
An adult green crab (Carcinus maenas) is about 6–7 cm
long but can grow larger. Green crabs can out-compete
and out-manoeuvre other crabs with ease. They feed on
many seashore organisms, particularly bivalve molluscs
such as clams, oysters, and mussels and small crustaceans.
Green crabs are quicker, more dexterous, and can open
shells more easily than other crab species. Green crabs are
native to Europe and were first transported to the US inside
small tunnels bored by shipworms into wooden ships. Green
crabs were noticed on the east coast of North America in
1817 and now occur from Nova Scotia to Virginia. The crab
is believed to be responsible for the destruction in the 1950s
of the soft-shelled clam fisheries which affected thousands
of people. Catches fell from 14.5 million pounds in 1938 to
2.3 million pounds in 1959, a period during which the range
of the green crab extended into the clam fishery area.
