Complete the notes below.

Write ONE WORD ONLY for each answer.
 

The Eucalyptus Tree in Australia

Importance

● it provides [1] and food for a wide range of species

● its leaves provide [2] which is used to make a disinfectant

Reasons for present decline in number

A) Diseases

(i) ‘Mundulla Yellows’

● Cause – lime used for making [3] was absorbed

– trees were unable to take in necessary iron through their roots

(ii) ‘Bell-miner Associated Die-back’

● Cause – [4] feed on eucalyptus leaves.

– they secrete a substance containing sugar

– bell-miner birds are attracted by this and keep away other species

B) Bushfires

William Jackson’s theory:

● high-frequency bushfires have impact on vegetation, resulting in the growth of [5]

● mid-frequency bushfires result in the growth of eucalyptus forests, because they:

– make more [6] available to the trees

– maintain the quality of the [7]

● low-frequency bushfires result in the growth of '[8] rainforest’, which is:

– a [9] ecosystem

– an ideal environment for the [10] of the bell-miner