Development and urbanisation can cause dramatic changes in the landscape resulting in the fragmentation of habitats and the potential isolation of various species. This can often lead to local extinctions of species. Conservation scientists and land managers are interested in how the landscape is interconnected in order to minimise the potential impacts on local flora and fauna.
There are three types of connectivity:
Below are two examples of connectivity:
Here we can see that the Casuarina trees have provided a safe corridor connecting the two patches of Eucalypt which is needed for foraging. When the Koala is in transit it can use the Casuarina trees to avoid attack from predators including wild dogs as well as use them as a resting site.
Click on the link below to download a colour A3 Poster for use in the classroom:
Here is an example of two patches of Eucalypt without a tree corridor. The Koalas in this scenario will need to cross on the ground exposing them to the risk of predation from either wild dogs or even raptors (especially with young koalas).
Koala in Casuarina
Koala in Mangrove
Koala in Melaleuca
The Eastern Grey Kangaroo (Macropus giganteus) is a herbivore and grazes on marine couch and other vegetation associated with the saltmarsh and stands of Melaleuca and Casuarina. Their droppings contain partially digested vegetation and are a rich source of nitrogen which can be utilised by other plants. Because the stools float they can be transported from these forests and grasslands directly to the saltmarsh, mangrove and estuarine habitats by the ebbing tide. This is another example of the connection in this case of nutrients between the various habitat types.
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