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Abstract Detail



Biogeography

Jobson, Peter [1].

The biogeography of the flora of arid central Australia: a preliminary study.

Contrary to what you would expect, the flora of central Australia is not poor in species number, but rather it consists of over 2300 species. This is due, in part, to the diverse landscape and soil types within this region. Sand dunes, claypans, salt lakes, gibber plains, river flood-outs, gorges – both deep and shallow, hills and mountain ranges all make up the landscape of central Australia.
The most speciose part of central Australia is the MacDonnell Ranges region, housing well over 1300 species, with the highest level of endemism as well as providing a refuge to species more often associated with wetter climates.
When looking at the floristics of the region, what is immediately obvious are the absences or poor representation of notable and iconic Australian genera. So, if the species one normally thinks of as iconically Australian are missing, but there are still large numbers of taxa present, what is the likely origin of the central Australian plants? The answer is a complex, three-pronged one. The three prongs are: temperate origin, tropical origin, and refugia from a wetter time.
This presentation is a preliminary study leading to a more detailed analysis of the biogeography of the flora of arid central Australia.


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1 - Northern Territory Herbarium, Alice Springs, Department of Environment and Natural Resources, PO Box 1120, Alice Springs, Northern Territory, 0870, Australia

Keywords:
Australia
arid
Proteaceae
Myrtaceae
Poaceae
Malvaceae
temperate origin
tropical origin.

Presentation Type: Oral Paper
Session: 13, Biogeography
Location: Sundance 3/Omni Hotel
Date: Monday, June 26th, 2017
Time: 2:15 PM
Number: 13004
Abstract ID:183
Candidate for Awards:None


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