Introduction of new organismPresentation Transcript
Introduction ofnew organisms P6 Interactions
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.
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.
RatsYou may think that rat’s are harmless, butyou are very wrong. In the country of NewZealand, Rat’s are a PEST. The rats of New Zealand has done immense damage to the native New Zealand bush. These ratswere stowaways on canoes or ships. Theserats ate Bird Nest and even got a chance to make a Speech in front of the Press( bottom pictures ).
+ = 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 pediaIsaac ong
•Possums is a threat to New Zealand The Possums is decreasing thepopulation of dingoes, bush fires and less palatable vegetation as they eat them. In New Zealand there are no predators and lots of very palatablevegetation as a result they have a huge impact on New Zealand ecosystems.
Feral foxes in AustraliaThe first introduction occurred in 1845 near Keilor, Victoria. The spread of red foxes across southern Australia coincided with declines in the distribution of severalmedium-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 islandswhere red foxes are absent or rare. Semi-arboreal species affected by fox predation include brush-tailed and western ringtail possums
Green crab a crushing blowAn adult green crab (Carcinus maenas) is about 6–7 cmlong but can grow larger. Green crabs can out-competeand out-manoeuvre other crabs with ease. They feed onmany seashore organisms, particularly bivalve molluscssuch as clams, oysters, and mussels and small crustaceans.Green crabs are quicker, more dexterous, and can openshells more easily than other crab species. Green crabs arenative to Europe and were first transported to the US insidesmall tunnels bored by shipworms into wooden ships. Greencrabs were noticed on the east coast of North America in1817 and now occur from Nova Scotia to Virginia. The crabis believed to be responsible for the destruction in the 1950sof the soft-shelled clam fisheries which affected thousandsof people. Catches fell from 14.5 million pounds in 1938 to2.3 million pounds in 1959, a period during which the rangeof the green crab extended into the clam fishery area.