NEET BIOLOGY

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ECOLOGY

ECOSYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In the north-western corner of Victoria is one of the best examples of a semi-arid ecosystem, the mallee woodlands. There are more than a dozen different species of eucalypts that are called mallee, all of which are distinctly multi-stemmed and grow from an underground lignotuber. Mallee trees are able to regenerate from the lignotuber after fire. This ecosystem is called a mallee woodland because:
A
the canopy is widely spaced, with 10-30% cover.
B
mallee wood harvesting is sustainable because the trees can re-sprout from the lignotuber.
C
the fairly open canopy covers 30-70% of the ground.
D
this ecosystem is more densely covered with trees than scrublands.
Explanation: 

Detailed explanation-1: -Widespread mallee tree species include Eucalyptus dumosa (white mallee), E. Socialis (red mallee), E. Gracilis (yorrell), E. oleosa (red mallee), and E.

Detailed explanation-2: -Instead of just a single trunk, mallees have many stems that rise from a large bulbous woody structure called a lignotuber, or mallee root. Most mallees are slow growing, tough trees which originate from arid and semi arid regions.

Detailed explanation-3: -The term mallee is also used in Australia to describe multistemmed woody plants that arise from an underground woody structure known as a lignotuber, or mallee root. This adaptation, common in many eucalypts of mallee ecosystems, allows the plants to resprout quickly following a wildfire.

Detailed explanation-4: -It is associated with infertile sandy soils and extends south through the mid South East as far as Lucindale where it grows on the sandy dunes and ridges. Coastal Mallee can be found in strips along the Coorong, and on the coast between Kingston and Beachport.

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