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The vegetation of an infrequently burned Tasmanian mountain region
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The Mt. Bobs-Boomerang area in southern Tasmania is rugged and mountainous
(600-1080m above sea level), with a perhumid cool (Thornthwaire classification) climate and a range
of geological substrates inclucling mudstone, sandstone, limestone and dolerite. 164 species of
vascular plants, all native to Tasmania, have been recorded in the study area. The subalpine vegetation
is composed primarily of rainforest and scrub communities. Fires have had major effects on these
communities, but are rare; the period since the Last fire varies between about 50 and 500 years. A small
area of herbland and heathland occupies the poorly drained valley fioors and different herbland
communities are found on the flats and limestone cliffs around Lake Sydney.
Above the treeline, which occurs at about 1000m on Mt. Bobs and the Boomerang, heathland
is the major vegetation formation. Herblands are found in sheltered sites with the longest snowlie, and
fjaeldmark, much of it associated with a pattern of non-sorted solifluction terraces, occupies the
highest, most exposed part of the mudstone-capped Boomerang.
Exposure to strong winds, snowlie, substrate type, degree of waterlogging and fire frequency
appear to be major environmental delerminants of the plant communities.
|Journal or Publication Title:||Proceedings of the Royal Society of Victoria|
|Page Range:||pp. 79-107|
|Date Deposited:||26 Sep 2007|
|Last Modified:||18 Nov 2014 03:22|
|Item Statistics:||View statistics for this item|
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