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Phenetic affinities, variability and conservation status of a rare Tasmanian endemic, Eucalyptus mossisbyi R.G.Brett

Wiltshire, RJE, Potts, BM and Reid, JB 1991 , 'Phenetic affinities, variability and conservation status of a rare Tasmanian endemic, Eucalyptus mossisbyi R.G.Brett', in MR Banks (ed.), Aspects of Tasmanian botany- a tribute to Winifred Curtis. , Royal Society of Tasmania, Hobart, pp. 213-229.

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Eucalyptus morrisbyi is a rare Tasmanian endemic confined to one larger population (c. 2000 mature individuals) and two
smaller populations( c. 15 and 16 mature individuals) in soulheastern Tasmania. Morphological studies within the informal
superspecies "Gunnii reveal Eucalypius morrisbyi has closest affinities to low altitude populations of E, gunnii in southeastern
Tasmania and yet has distinct, phenetic differences from that species. Levels of variation in E. morrisbyi populations appear
comparable to other species despite their small population size. A low frequency of hybridistion occur with E, viminniis in
natural stands but is unlikely to have affected the level of variability in the Calvets Hill and Risdon Hill natural populations.
In contrast, it is shown that a high frequency of seedlings grown from a planted and remnant stand of E. morrishyi have affinities
with E. viminalis. Several of the planted trees appeared to be hybrids and some progeny from phenotypically normal trees also
appeared to be of hybridorigin. These results suggest that the genetic integrity of the speciesmay becampromisedby injudicious
selection of seed for propagation from plantings and could be a major problem for the ex situ conservation of this and other rare
and endangered specie. Recommendations are given to enhance the conservation of this endangered Tasmanian endemic.

Item Type: Book Section
Authors/Creators:Wiltshire, RJE and Potts, BM and Reid, JB
Keywords: rare endemic, endangered species, conservation, Eucalyptus morrisbyi, Tasmania.
Journal or Publication Title: no citation
Publisher: Royal Society of Tasmania
Additional Information:

BM Potts.

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