Phytogeographical Analysis of Tasmanian Alpine Floras

Kirkpatrick, JB

doi:10.2307/2844668

Cited by 55 publications

(35 citation statements)

References 12 publications

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“…2). The occurrence of abrupt treelines in Tasmanian is unusual, with only a few other locations across the state displaying similar sharpness (Kirkpatrick 1982 …”

Section: Study Areamentioning

confidence: 99%

“…The alpine treeline forms where temperatures become too low to support tree growth. In Tasmania, trees are often excluded for other environmental reasons, making it difficult to locate the climatic treeline (Kirkpatrick 1982). The position of alpine treelines around the world has been modelled by Paulsen & Körner (2014) as a minimum growing season length of 94 days with all days exceeding a mean air temperature of 0.9°C and a mean air temperature of 6.4°C over the season.…”

Section: Introductionmentioning

confidence: 99%

“…The alpine zone, which is characterised by the absence of trees, is located between the alpine treeline and the line of permanent snow and ice. In Tasmania it is also characterised by a rich floristic diversity in which up to 70% of vascular plant species on particular mountains are endemic to Tasmania (Kirkpatrick 1982). The alpine treeline is defined by Paulsen & Körner (2014) as the maximum line of elevation that connects groups of trees growing to a height of 3 m or more.…”

Section: Introductionmentioning

confidence: 99%

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Decadal-scale vegetation dynamics above the alpine treeline, Mount Rufus, Tasmania

Harrison‐Day¹,

Balmer²,

Kirkpatrick³

2016

PPRST

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Alpine areas by definition have summer temperatures too cool to support trees. Concerns have been raised that trees may invade these distinctive habitats where global climate change results in an increase in summer temperatures beyond the threshold limiting tree growth. In 2016, we investigated changes in the treeline and vegetation immediately above it by resampling quadrats and rephotographing from the set points established in the Alpine Treeline Ecotone Monitoring Program on Mount Rufus, Tasmania, in 2006. Within the study area, the only species with the potential to reach a tree height > 3 m is Eucalyptus coccifera Hook.f. The height, density, basal diameter and diameter at breast height were recorded for all E. coccifera within the study area, together with an estimate of percentage cover of each vascular plant species. No change was found in the location of the treeline over the 10-year period, although E. coccifera height and density above the treeline did increase. The vegetation on the north-facing slope shifted to a composition more closely related to the forest below the treeline, while on the south-facing slope forest species reduced in abundance and the vegetation became more dominated by alpine species. Historical aerial photographs suggest that there has been a minor and inconsistent establishment of E. coccifera plants at higher altitudes since 1953. The area was burned by bushfire in 1965, making it difficult to separate the effects of putative climate change and recovery after the fire event on vegetation changes, although data from Lake St Clair suggest a local constancy of mean growing season temperatures and rainfall.

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“…2). The occurrence of abrupt treelines in Tasmanian is unusual, with only a few other locations across the state displaying similar sharpness (Kirkpatrick 1982 …”

Section: Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Decadal-scale vegetation dynamics above the alpine treeline, Mount Rufus, Tasmania

Harrison‐Day¹,

Balmer²,

Kirkpatrick³

2016

PPRST

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“…Kirkpatrick (1982) noted that there are no extensive areas where herbaceous daisies are as common in Tasmania as in Kosciuszko National Park, suggesting that soil is protected from erosion in the latter by more persistent snow cover. Due to Tasmania's different history from that of the mainland, as well as current differences, the Tasmanian specimens of L. squamatus may have followed a slightly different evolutionary route.…”

Section: Biogeographymentioning

confidence: 99%

“…Although Tasmania has a larger alpine region (6480 km 2 ) than mainland Australia (5180 km 2 ) (Willliams and Costin 1994), L. squamatus is not noted in many Tasmanian alpine studies (absent : Kirkpatrick 1982;Smith 1986;present: Davies 1996), while it is recorded in nearly all mainland alpine studies (Beauglehole 1981;Gullan and Norris 1981;van Rees 1981;McDougall 1982;Walsh et al 1984;van Rees and Walsh 1985;Inouye and Pyke 1988;Williams 1992;Wahren et al 1994), except for the Baw Baw Plateau (Strickland and Strickland 1997). Kirkpatrick (1982) noted that there are no extensive areas where herbaceous daisies are as common in Tasmania as in Kosciuszko National Park, suggesting that soil is protected from erosion in the latter by more persistent snow cover.…”

Section: Biogeographymentioning

confidence: 99%

Morphological variation in Leptorhynchos squamatus (Gnaphalieae: Asteraceae)

Flann¹,

Ladiges²,

Walsh³

2002

Aust. Systematic Bot.

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All enquiries and manuscripts should be directed to:An international journal devoted t o t h e t a x o n o my, b i o g e o g r a p hy and evolution of all plant groups a u s t r a l i a n s y s t e m a t i c b o t a n y Abstract. A study of morphological variation in Leptorhynchos squamatus (Labill.) Less. across its range in south-eastern Australia was undertaken to test the hypothesis that L. squamatus includes two taxa. Phenetic pattern analyses of both field-collected and herbarium specimens on the basis of morphology confirmed two major groups. Bract, cypsela, pappus bristle and leaf characters were particularly important in separating the two groups. The taxa are separated by altitude differences with one being a low-altitude plant found in many habitats and the other being a high-altitude taxon that is a major component of alpine meadows. Lowland plants have dark bract tips, fewer and wider pappus bristles than alpine plants, papillae on the cypselas and more linear leaves. A somewhat intermediate population from the Major Mitchell Plateau in the Grampians shows some alpine and some lowland characters but is included in the lowland taxon. Seeds from five populations (two alpine, two lowland and Major Mitchell) were germinated and plants grown for 18 weeks under four controlled sets of environmental conditions. The experiment showed that leaf size and some other characters are affected by environmental conditions, but that there are underlying genetic differences between the lowland and alpine forms. Leptorhynchos squamatus subsp. alpinus Flann is described here to accommodate the highland taxon.

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The Biomes of the Coldest Corners of the World

Mucina

2023

Biome Ecology

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Phytogeographical Analysis of Tasmanian Alpine Floras

Cited by 55 publications

References 12 publications

Decadal-scale vegetation dynamics above the alpine treeline, Mount Rufus, Tasmania

Decadal-scale vegetation dynamics above the alpine treeline, Mount Rufus, Tasmania

Morphological variation in Leptorhynchos squamatus (Gnaphalieae: Asteraceae)

The Biomes of the Coldest Corners of the World

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