Brown, M. J. and F. D. Podger (1982). "Floristics and fire regimes of a
vegetation sequence from sedgeland-heath to rainforest at Bathurst Harbour,
Tasmania." Aust. J. Bot. 30(6): 659-676.
The floristic differences found in vegetation ranging from sedgeland-heath
to rainforest were sampled by the placement of 80 quadrats in an area 2 km
super(2) near Bathurst Harbour, Tasmania. A direct gradient analysis using
the time since last fire as the major axis of variation suggests that the
changing species composition of sites is both gradational and fire-related.
Previous descriptive models based on correlations between fire frequency
and structural formations are confirmed by this study. A broad correlation
between fire frequency and floristic associations within non-forested
vegetation is also demonstrated. However, explanation of detailed patterns
requires consideration of the total fire regime (including duration and
intensity of fire) and its interaction with edaphic factors. For example,
fires which burn in peat lead to hysteresis in the successional pathways.
Brown, M. J., R. K. Crowden, et al. (1982). "Vegetation of an Alkaline Pan
-- Acidic Peat Mosaic in the Hardwood River Valley, Tasmania." Aust. J.
Ecol. 7(1): 3-12.
The vegetation associated with sandy alkaline pans and surrounding acidic
peats in south-west Tasmania is described. The upper margins of the pans
are characterized by sharp environmental discontinuities, with pH changes
of more than 3 units in only 20 cm being recorded. Classification and
ordination of quadrats by plant species associated with a typical pan
showed that five distinct communities are evident, but that these form a
gradational series which reflects the altering edaphic status of the sites
during infilling of the pans. The pH, drainage and redox characteristics of
the substrates are among the factors determining the frequency of
particular species at any stage of the progression. Frequency histograms
for plant species in and around the pans indicate that many of the species
respond individually to changing pH.
Brown, M. J. and F. Podger (1982). "On the apparent anomaly between
observed and predicted percentages of vegetation types in south-west
Tasmania." Aust. J. Ecol no. 2: pp.
There is an anomaly apparent between the estimated percentage of area of
rainforest in south-west Tasmania and the amount predicted by a Markovian
model based on fire frequency. The anomaly results from a misinterpretation
of the original reference. The predicted percentages of vegetation types
are in broad accord with present day distributions, and variations can be
explained by relatively minor shifts of fire frequency estimates.
Brown, M. J., J. B. Kirkpatrick, et al. (1983). "Conservation status of
endemic vascular plants in alpine Tasmania." MOUNTAIN ECOLOGY IN THE
AUSTRALIAN REGION. Purdie, R.W. 12(12): 168-169.
Tasmania's endemic vascular flora comprises some 300 taxa; about 50% of
these occur in alpine habitats, and all but 8 of the alpine taxa have
adequate populations in State Reserves. Increasing usage of State Reserves
creates problems for management, but the chief threat to endemic alpine
species comes from fire. Fires in the period 1960-80 have burnt about 16%
of the total area of alpine vegetation in Tasmania. Management for the
continued protection of adequate populations of endemic species thus
involves the management of fire, both in alpine and in adjacent areas.
Brown, M. J., D. A. Ratkowsky, et al. (1984). "A comparison of detrended
correspondence analysis and principal co-ordinates analysis using four sets
of Tasmanian vegetation data." Aust. J. Ecol. 9(3): 273-279.
Indirect gradient analysis, which entails the elucidation of relationships
between trends in community composition and underlying environmental or
successional gradients, is a major objective of ordination in plant
ecology. Two ordination techniques, detrended correspondence analysis (DCA)
and principal co-ordinates analysis (PCOA), were compared using three sets
of Tasmanian vegetation data having known gradients and oneset where the
vegetation was expected to respond to diverse environmental variables. In
every case, the results obtained by DCA were considered superior to, or at
least as good as, those of PCOA. Hence, DCA appears to be the more suitable
of the two methods for indirect gradient analysis.
Campbell, E. O. (1983). "Mires of Australasia." MIRES: SWAMP, BOG, FEN AND
MOOR. REGIONAL STUDIES. Gore, A.J.P. ed.
The author reviews the wetlands of Australia, Tasmania and New Zealand;
and the effects of climate on their development and geographical
distribution. Wetland vegetation are covered and used to classify types of
wetlands as well as soil composition. The main land masses of the
Australasian region are Australia, Tasmania and New Zealand. Australia is
an island continent with an area over three-quarters that of Europe.
Politically it is divided into the Australian Capital Territory, the
Northern Territory and the states of Western Australia, Queensland, New
South Wales, Victoria and South Australia. Tasmania is an island lying some
200 km to the south of Victoria. It is politically part of Australia and
has an area slightly less than that of Scotland. New Zealand lies some 1600
km to the southeast of Australia. It consists of three main islands, known
as North Island, South Island and the smaller Stewart Island, with a total
area about seven-sixths of that of Great Britain.
Costin, A. B. (1983). "Mountain lands in the Australian region: Some
principles of use and management." MOUNTAIN ECOLOGY IN THE AUSTRALIAN
REGION. Purdie, R.W. 12(12): 1-13.
The main group of mountain lands in the Australian Region are the
NewGuinea Highlands, the Great Dividing Range, the east coast ranges, the
great Western Plateau, Tasmania, and various islands. Some aspects of
research on palaeo-ecology and plant/animal/environment interactions are
reviewed briefly. Problems of land use and management present special
challenges to ecologists. These include the improvement of procedures for
determining land use, and the application of principles of management
appropriate to natural vegetation for the purposes of nature conservation,
recreation and tourism, water catchment, grazing and forestry. Examples are
given of the use of data on vegetation successions to assist management.
Duncan, F. and D. Duncan (1984). "A dry sclerophyll woodland mosaic:
Vegetation of Cherry Tree Hill, near Cranbrook, Tasmania." Rec. Queen
Victoria Mus., Launceston.(85).
The vegetation was surveyed on a block of uncommitted Crown Land,
approximately 100 hectares in area, near Cherry Tree Hill on Tasmania's
Central East Coast. The country comprising the Crown Land block is gently
undulating, consisting of low rocky hills separated by flats with somewhat
impeded drainage. Landforms are more varied in the surrounding private
property and the nearby State Forest. Altitudinal range of the Crown Land
block is 140 to 180 metres a.s.l. The area is located in the dry subhumid
warm climatic zone (Gentilli, 1972). Annual average rainfall at Cranbrook,
seven kilometres to the south-west, is 648mm, with little variation between
months. Temperature records from Swansea, 20 kilometres to the south-west,
show an average daily maximum temperature of 17.6 degree C, and an average
daily minimum of 7.5 degree C. January and February are the hottest months,
July is the coldest. The dominant vegetation of the area is uneven-aged dry
sclerophyll woodland dominated by Eucalyptus pulchella . Mallee-form
Eucalyptus barberi is widespread on dry sites. It is replaced by Eucalyptus
ovata as drainage becomes more impeded on flats and soaks. Eucalyptus
pulchella -E. viminalis plus or minus globulus open-forest occurs locally
on shaded slopes.
Forestry (1995). "The rainforest map of Tasmania." 1(1).
Frey, W. and P. Dalton (1996). "Hypnodendron comosum-community in
Tasmania." Nova Hedwigia 62(1-2): 215-220.
Hypnodendron comosum var. comosum var. sieberi and H. vitiense subsp.
australe (endemic in SE Australia, Tasmania and New Zealand and thought to
be archaic taxa) form a typical dendroid community. The dendroid taxa reach
high cover values and characterize the feature of the community ("miniature
forest"), which is described for the first time from Tasmania. Surveys were
made in western Tasmania, in rain forests characterized by Nothofagus
cunninghamii, Atherosperma moschatum and Eucryphia lucida and the conifers
Phyllocladus, Lagarostrobus [Lagarostrobos] and Athrotaxis. On loamy and
humic soil the number of species of the community is low, increasing on
decaying wood. The community is a complementary one to those described from
New Zealand. It is assumed that such dendroid bryophyte communities from
forests which today are temperate rain forests of the southern hemisphere
represent a relict vegetation of the forest floor of former Gondwanaland
forests.
Fuhrer, B. and R. Robinson (1992). "Rainforest fungi of Tasmania and
south-east Australia." 95(15).
A book containing brief descriptions, with colour photographs, of some of
the fungi of the cool temperate rain forests of Tasmania and Victoria.
Gibson, N. and J. B. Kirkpatrick (1985). "Vegetation and flora associated
with localized snow accumulation at Mount Field West, Tasmania." Aust. J.
Ecol. 10(2): 91-99.
The vegetation associated with a snow patch at Mt Field in Tasmania is
described and mapped. Seven distinct vegetation types were found to be
related directly to topography and hence to the patterns of snow
accumulation, snow melt and soil drainage. The fjaeldmark found where snow
lies longest in unusual for Tasmania and may be the product of past
climatic events and a peculiar parent material. At the generic level there
exists a high similarity with the snow patch flora of the Australian Alps.
Gibson, N. and J. B. Kirkpatrick (1985). "A comparison of the cushion plant
communities of New Zealand and Tasmania." N.Z. J. Bot no. 4: pp.
Communities dominated by species of cushion plants are widespread in the
alpine and subalpine zones of New Zealand and Tasmania. In New Zealand this
vegetation type contains six major associations. These are described as
alpine herbmoor, cushion bog, high alpine cushion moor, alpine cushion
herbfield, and rock and river shingle cushion communities, their
distributions being closely related to particular geomorphic environments.
In Tasmania there are four major associations. These are described as
Abrotanella cushion heath, high mountain cushion heath, mosaic cushion
heath, and Donatia cushion heath, their distributions being most closely
related to altitude, precipitation, and rock type. Of the six New Zealand
cushion associations, herbmoor and cushion bog have the highest proportion
of species also occurring in Tasmania.
Gibson, N., Davies J, et al. (1991). "The ecology of Lagarostrobos
franklinii (Hook. f.) Quinn (Podocarpaceae) in Tasmania. 1. Distribution,
floristics and environmental correlates." Australian Journal of Ecology
16(2): 215-222.
A survey of Huon pine (Lagarostrobos franklinii) in Tasmania was carried
out during 3 summers from 1982 to 1985. Four major community types, largely
restricted to the river systems of W. and S. Tasmania, were identified,
viz. (1) Huon pine rain forest (poorly formed canopy trees and an
intermixed tall tangled understorey); (2) thamnic Huon pine rain forest
(moderately well formed canopy trees and a medium to low tangled
understorey); (3) gallery Huon pine rain forest; and (4) Huon pine scrub.
Continuous variation was found between most of these communities. The
floristic variability was correlated with temperature, rainfall and
geological gradients. It is suggested that the restricted nature of Huon
pine distribution in Tasmania is associated with a slow terrestrial
dispersal rate rather than a narrow fundamental niche. There is some
evidence to suggest that the species has been further restricted by fire.
Gibson, N., Brown Mj, et al. (1992). "Flora and vegetation of ultramafic
areas in Tasmania." Australian Journal of Ecology 17(3): 297-303.
The flora and plant communities were surveyed of 15 areas of ultramafic
(serpentine) rock in Tasmania. Dry sclerophyll communities on ultramafic
rock were restricted to 2 areas in the north of Tasmania. In the wetter
western and southern areas the ultramafic land supported heathlands, wet
scrubs, and a wet sclerophyll/mixed forest community dominated by
Eucalyptus obliqua, E. nitida or E. delegatensis. One of the most striking
features of the ultramafic areas in Tasmania is the variable degree of
physiognomic differentiation between adjacent ultramafic and non-ultramafic
substrates at the different sites. Physiognomic differentiation is less on
non-lateritic soil types or where accumulation of colluvial material has
occurred. Only 3 ultramafic endemic taxa were recorded.
Hickey, J. and M. Savva (1992). "The extent, regeneration and growth of
Tasmanian lowland mixed forest." 106(66).
A discussion is presented of the extent, regeneration, growth and
management of Tasmanian lowland mixed forest. Up to 195 000 ha (20%) of
Tasmania's wet eucalypt (Eucalyptus spp.) forest is mature mixed forest
>110-yr-old. At least 33% is reserved in the Tasmanian Wilderness World
Heritage Area or in other State and Forest Reserves. Almost half the area
of mixed forest with a mature myrtle (Nothofagus cunninghamii) understorey
has a eucalypt density of only 5-20% which implies that it is in the last
successional stage prior to becoming rain forest. In the absence of
disturbance, large areas of the mixed forest can be expected to become rain
forest in <100 yr. An analysis of data from randomly located plots in
eucalypt regeneration established on mixed forest and rain forest sites
showed that 57% of sites contained 20- to 30-yr-old myrtle regeneration. A
comparison of the floristics of 20- to 30-yr-old regeneration (occurring
after wildfire and felling) with old-growth mixed forest showed that the
mean frequency of most rain forest species was greatest in old growth
forest and lowest after felling. The major 'special timbers' harvested from
the mixed forest are blackwood (Acacia melanoxylon), celery-top pine
(Phyllocladus aspleniifolius), leatherwood (Eucryphia lucida), myrtle,
sassafras (Atherosperma moschatum) and silver wattle (Acacia dealbata).
Hickey, J. E. (1994). "A floristic comparison of vascular species in
Tasmanian oldgrowth mixed forest with regeneration resulting from logging
and wildfire." Aust. J. Bot no. 4: pp.
About 20% of Tasmania's wet eucalypt forest is mixed forest, i.e. having a
rainforest understorey and a eucalypt overstorey. While one-third of the
mixed forest is formally reserved, much of the remainder is subject to
logging on an 80-100 year rotation which is insufficient for the
redevelopment of mature mixed forest. The routine silvicultural
regeneration treatment for wet eucalypt forests is to clearfell, burn and
sow with eucalypt seed. A comparison of the vascular floristics of
20-30-year-old silvicultural and wildfire regeneration with oldgrowth mixed
forest showed that most species common in oldgrowth mixed forest were
represented in approximately similar frequencies in silvicultural
regeneration and wildfire regeneration. The major floristic difference
between the two regeneration types was the much lower frequency of
oldgrowth epiphytic fern species in silvicultural regeneration and a higher
frequency of a sedge species often associated with disturbed areas.
However, after a single logging treatment, the vascular plant floristics of
silvicultural regeneration were sufficiently similar to wildfire
regeneration to assume that, in the absence of further logging or fires,
the silvicultural regeneration could become mature mixed forest and
eventually rainforest. Further work is required to determine whether
regrowth mixed forest can be logged at 80-100 years and still retain
sufficient rainforest elements to eventually return to mixed forest within
the life span of the dominant eucalypts. The critical factor in the
silvicultural perpetuation of mixed forest may be rotation length rather
than regeneration treatment.
Hill, R. and Scriven Lj (1995). "The angiosperm-dominated woody vegetation
of Antarctica: a review." Review of Palaeobotany and Palynology 86(3-4):
175-198.
Antarctic vegetation is today mostly restricted to non-vascular plants,
with a few small angiosperms clinging to the Antarctic Peninsula. However,
probably as recently as the mid-Late Pliocene, woody angiosperms were
present in inland Antarctica, suggesting an overall presence of complex and
diverse vegetation. Angiosperms were introduced into Antarctica during the
Cretaceous from South America and possibly also Southeast Asia via
Australia. These angiosperms speciated rapidly at the prevailing high
latitudes and were an important source for the developing
angiosperm-dominated vegetation of the Southern Hemisphere. The migration
and evolution of early angiosperms in Gondwana was probably facilitated by
a high level of disturbance caused primarily by the rifting of the
supercontinent. This high-latitude region was an important source of
evolutionary novelty during the Late Cretaceous-Paleogene. As the climate
deteriorated during the Cenozoic, the angiosperm flora was reduced in
biomass and diversity, finally being restricted to the current remnants.
The timing and nature of this major regional extinction is still poorly
understood.
Jarman, S. J. and M. J. Brown (1983). "A definition of cool temperate
rainforest in Tasmania." Search no. 3-4: pp.
A definition based on floristic composition and regeneration processes is
provided for cool temperate rainforest in Tasmania. The definition is also
presented in phytogeographic terms, reflecting current thoughts on the
antiquity of various floristic elements in the Australian flora.
Jarman, S. and G. Kantvilas (1995). "Epiphytes on an old Huon pine tree
(Lagarostrobos franklinii) in Tasmanian rainforest." New Zealand Journal of
Botany 33(1): 65-78.
The epiphytic flora of an old Huon pine (Lagarostrobos franklinii) in
western Tasmania is composed of 76 lichens, 55 bryophytes and 16 vascular
plant species. There is a vertical zonation of the cryptogams on the tree,
with little overlap between basal and canopy floras. Bryophytes are the
dominant life form at the base of the tree but there is a marked increase
in the diversity of lichens and in the ratio of lichens to bryophytes, with
increasing height. The longevity of the tree is manifest in the development
of a wide range of microhabitats but it seems unlikely that any of the
cryptogams require such longevity per se to become established as rain
forest epiphytes. However, several of the vascular species on the tree are
normally terrestrial and their occurrence as epiphytes is dependent on the
development of sufficient peat to support their root systems. Such a
process is likely to be very slow, requiring a long-lived host species. The
study illustrates the richness of lichens and bryophytes in the forest
ecosystem and the extent to which even a single tree can contribute to the
biodiversity of a forest site.
Jarman, S. and G. Kantvilas (1995). "A floristic study of rainforest
bryophytes and lichens in Tasmania's myrtle-beech [Nothofagus cunninghamii]
alliance." Tasmanian NRCP Report No. 14, v + 55 pp.; 47 ref. PUBLISHER
INFORMATION(Forestry Commission): Tasmamia.
Jarman, S. J. and J. E. Hickey (1996). "The Tasmanian component of the
National Rainforest Conservation Program - summary of projects." Tasmanian
NRCP Report No. 16: 61 pp.
A summary is presented of the work undertaken in Tamania during the
National Rainforest Conservation Program. After an introduction the report
is arranged in 6 sections: research; inventory; planning; education;
visitor facilities and site works; and publications.
Kantvilas, G. and P. W. James (1987). "The macrolichens of Tasmanian
rainforest: Key and notes." Lichenologist no. 1: pp.
An identification key to 128 macrolichen species from Tasmanian
rain-forest is presented. Additional data on the flora are also included.
Five new species, Menegazzia caesiopruinosa P. James, M. confusa P. James,
M. inactiva P. James & Kantvilas, M. minuta P. James & Kantvilas and M.
subbullata P. James & Kantvilas, are described, and the new combination
Leioderma amphibolum (Knight) P.M. Joergensen & D. Galloway is made.
Kantvilas, G. (1988). "Tasmanian rainforest lichen communities: A
preliminary classification." Phytocoenologia no. 3: pp.
Eleven epiphytic lichen communities are described from cool temperate
rainforest at Little Fisher River, Tasmania. Apart from relatively minor
compositional details, the communities are widespread and typical of a
broad range of rainforest vegetation in Tasmania. Interrelationships
between the communities, based on succession and changes in light and
moisture regimes are proposed. Additional lichen vegetation at the study
site, including that on the forest floor and on decomposing eucalypt wood,
is considered adventive from neighbouring-non-rainforest vegetation.
Kantvilas, G. and S. J. Jarman (1993). "The cryptogamic flora of an
isolated rainforest fragment in Tasmania." Bot. J. Linn. Soc. 111(2):
211-228.
The cryptogamic flora of a small isolated natural fragment of rainforest
in south-eastern Tasmania has retained its rainforest character but has
been modified in comparison to the flora of large, well-buffered rainforest
stands. There is a high proportion of widespread wet forest species and
many typical rainforest lichens and bryophytes are absent or represented
only by depauperate and/or sterile individuals. The relative proportions of
hepatics to mosses is reversed compared with that normally found in
rainforest and there is a much lower diversity in the bryophyte flora. In
spite of these modifications, the flora of the rainforest fragment is quite
distinct from that of the surrounding sclerophyll vegetation. The community
acts as a refuge for many species and contributes significantly to the
overall biodiversity of the area. The site is very important for biological
conservation but the data suggest that the ecosystem is extremely fragile
and must be protected from future disturbance if its rainforest flora is to
survive. The new combination, Bacidia vallatula (Jatta) Kantvilas, is
proposed, and the lichen Byssoloma subdiscordans (Nyl.) P. James is
recorded from Tasmania for the first time.
Kirkpatrick, J. B. (1982). "Phytogeographical Analysis of Tasmanian Alpine
Floras." J. Biogeogr. 9(3): 255-271.
Lists of vascular plant species were obtained from twenty-eight, disjunct,
high altitude, treeless areas in Tasmania. These lists pertained to
vegetation dominated by the austral-montane element of the flora which is
found both above and below the usually indistinct, and often absent,
Tasmanian upper slope treeline. A polythetic, agglomerative classification
of the Tasmanian and four Australian mainland alpine floras resulted in
five groups: the mainland mountains, the eastern Tasmanian mountains, a
group extending north-south through the center of Tasmania, western
Tasmanian quartzite mountains, and western Tasmanian mountains formed from
more weatherable parent material. The Tasmanian floras form a continuum
closely, related to mean annual precipitation and surface geology, but not
strongly related to continentality. Tasmanian endemism increases strongly
from east to west, and similarity values with the mainland mountain floras
and the New Zealand flora show the reverse pattern. It is suggested that
the variation in and between the alpine floras of Tasmania and mainland
Australia may be largely related to edaphic conditions.
Kirkpatrick, J. B. and C. E. Harwood (1983). "Plant communities of
Tasmanian wetlands." Aust. J. Bot. 31(5): 437-451.
The macrophytic vegetation of Tasmanian wetlands consists of forest,
scrub, marginal herbland, tussock sedgeland, sedgeland, reed swamp and
aquatic herbland. More than 80 taxa dominate or codominate in at least one
division of at least one fo the 530 wetlands from which data were obtained.
Communities dominated by each of 16 of these taxa occur in 10 or more
wetlands and vary in mean richness from 4 to 18 species, richness
increasing towards the margins of wetlands, with the area of wetland, and
with decreasing salinity. A combination of salinity and permanence indices
explains over one-third of the floristic variation between these
communities; within freshwater wetlands, pH has more influence than the
permanence index. The Tasmanian wetland flora is a subset of that of
mainland Australia. Most Tasmanian wetland plant communities probably occur
on the Australian mainland. Many of the wetland vegetation types
discriminated on the mainland do not occur in Tasmanian non-tidal wetlands.
Kirkpatrick, J. B. (1983). "Treeless plant communities of the Tasmanian
High Country." MOUNTAIN ECOLOGY IN THE AUSTRALIAN REGION. Purdie, R.W. 12:
61-77.
Analyses of the associations of 65 dominant species from 430 quadrats
located in Tasmanian treeless high altitude vegetation are used to provide
a framework and guidelines for the construction of a typology of plant
communities. These communities are listed and discussed within the context
of the following vegetation types: bolster heath, deciduous heath,
coniferous heath, heath, fjaeldmark, bog, fen, short alpine herbfield, tall
alpine herfield and tussock grassland. The distribution of communities is
best related to a climatically and geologically-controlled edaphic
gradient, a soil drainage gradient and to the vagaries of fire history. The
successional status of most of the plant communities is deduced from their
patterns of distribution. Several of the alpine dominants usually fail to
regenerate after fire. There is insufficient evidence to support a widely
suggested cyclic succession process involving bolster plants.
Kirkpatrick, J. B. and M. J. Brown (1984). "A numerical analysis of
Tasmanian higher plant endemism." Bot. J. Linn. Soc no. 3: pp.
Tasmanian endemic plant taxa at the species level or below were placed in
geographic elements according to the distribution of their genera. These
elements are associated with different environments, the endemic and
Antarctic elements being most prominent in rainforest and alpine
communities; the cosmopolitan element in alpine communities, and the
Australian element in the fire-prone lowland communities. The proportions
of endemic species in local Tasmanian floras were almost totally explained
by altitude and precipitation in a stepwise multiple regression analysis.
However, it is possible that many of the endemic species have not been able
to occupy their potential range in Tasmania as a result of insufficient
time having elapsed for them to fully expand from glacial refugia.
Kirkpatrick, J. B. (1986). "Conservation of plant species, alliances and
associations of the treeless high country of Tasmania, Australia." Biol.
Conserv. 37(1): 43-58.
The treeless high country of Tasmania has considerable conservation and
catchment value. Much of its area lies within National Parks and other
reserves of similar tenure, but many species and communities are confined
to land of less secure status. Much high mountain land is subject to
stockgrazing and burning, both of which activities have led to
deterioration in vegetation and soils. The reservation status of species
and communities can be made near perfect with relatively small additions to
the State Reserve system. However, the impacts of trampling and deliberate
fires do not respect reserve boundaries, and their mitigation or
elimination requires some intensive management.
Kirkpatrick, J. B. and F. Duncan (1987). "Tasmanian high altitude grassy
vegetation: Its distribution, community composition and conservation
status." Aust. J. Ecol. 12(1): 73-86.
Grassy woodland, grassy shrubland, grassy sedgeland, tussock grassland and
grassland are extensive on basalt, limestone and fine-textured Quaternary
deposits, are occasional on dolerite, granite and fine-grained sedimentary
rocks, but are absent from the siliceous mountains of Tasmania. With the
exception of limestone lithosols, the grassy communities are confined to
relatively deep soils with a low surface rock cover. Much of the area of
the grassy communities below the climatic treeline has clearly been forest
in the recent past, although some of the higher subalpine plains seem
likely to have been grassy at least since the peak of the Last Glacial.
Lynch, A. J. J. and J. B. Kirkpatrick (1995). "Pattern and process in
alpine vegetation and landforms at Hill One, Southern Range, Tasmania."
Aust. J. Bot no. 6: pp.
Hill One is a wind-exposed, alpine environment in southern Tasmania. The
prevailing wind-stream is westerly. However, high intensity south-westerly
winds associated with frost events appear to control the patterning of
fjaeldmark. These winds cause necrosis of prostrate Richea scoparia and
cushion plants on their south-western side and induce migration of
individual plants in a north-easterly direction. Fjaeldmark is confined to
the exposed mountain summit and terrace and step treads. Mosaic cushion
heath occurs in more exposed and poorly drained areas than other heath
communities. The horizontally bedded sediments of Hill One have been worked
by erosional and depositional agents into a complex morphology. Large
terraces and non-sorted steps are likely to have formed from altiplanation
processes, that is, differential erosion of interbedded sediments, with
accumulation of erosional debris at the foot of the risers. Depositional
lobes and erosional washout features are actively forming in localised
areas of concentrated drainage. The distribution of plant communities is
closely associated with rockiness, wind exposure and drainage.
McCormick, N. (1991). "Lowland dry eucalypt forests." Technical Bulletin
Native Forest Silviculture, Forestry Commission, Tasmania(3).
In part A, silvicultural prescriptions are given for the management of
lowland dry eucalypt forests in Tasmania; detailed guidelines for selection
of the appropriate silvicultural system are presented. In part B,
descriptions are given of these forests, which are the dominant forest type
below 600 m altitude in the drier regions of N. and E. Tasmania.
Twenty-five of the 29 Eucalyptus spp. in Tasmania are found in these
forests.
Minchin, P. R. (1989). "Montane vegetation of the Mt. Field massif,
Tasmania: A test of some hypotheses about properties of community
patterns." Vegetatio 83: 1-2.
Direct gradient analysis was applied to the montane vegetation of the Mt.
Field massif, Tasmania. The hypotheses tested were that: (1) the ecological
responses of species are generally of Gaussian form; (2) the modes of
"minor" species have a uniform random distribution along gradients; (3) the
modes of "major" species are evenly distributed; (4) the frequency
distribution over species of modal abundance is either lograndom or
lognormal; and (5) alpha diversity has a unimodal trend along environmental
gradients. Hypothesis (1) was rejected: only 45% of species had response
surface which appeared unimodal and symmetric. Hypotheses (2) and (4) were
rejected for the full set of species, but each was supported for all but
one of the structural groups. Although total alpha diversity had a complex
trend surface, the patterns for the alpha diversities of each structural
group were unimodal, in accordance with hypothesis (5). The results suggest
that an adequate model of community variation along environmental gradients
must take into account differences in response patterns between species
groups.
Pannell, J. (1992). "Swamp forests of Tasmania." 159(5).
The swamp forest and related vegetation in Tasmania was surveyed [date not
given]. The vegetation was classified into 29 communities in 6 community
groups, viz. (A) callidendrous swamp forests (5 communities), (B) thamnic
swamp forests (6), (C) coastal swamp forests (6), (D) riparian blackwood
communities (7), (E) montane tea-tree forests (2) and (F) tea-tree scrub
forests (3). All groups are typically dominated by sclerophyllous species
of the genera Acacia, Leptospermum and Melaleuca. Groups A, B and C are
swamp communities, characterized by the absence of certain wet sclerophyll
forest species that appear to be intolerant of the poor drainage conditions
in swamps. Groups D, E and F are non-swamp forest communities. The
persistance of sclerophylly in the swamps does not depend on massive
disturbance. Sclerophyllous dominants are able to maintain themselves by
gap phasereplacement. The area of swamp forest in Tasmania was estimated
at 13 000 ha; this represents about one-third of the area prior to European
settlement. Only 4% of the total area of Tasmania's extent swamp forest
area is in reserves.