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Abstract Detail


Systematics Section/ASPT

Clopton, Jessica [1], Mast, Austin [2].

The role of soil phosphorus in trait evolution and diversification of Hakea (Proteaceae) in the southwest Australian Floristic Region.

The southwestern Australian floristic region (SWAFR) is a biodiversity hotspot. The diversity of this region is interesting due to the strikingly different characteristics of the landscape, compared to more familiar flora and terrain of the Northern Hemisphere. Most plant growth worldwide is nitrogen limited; on Australian soil, growth is phosphorus limited, as phosphorus weathered away during millions of years of landscape exposure, with no tectonic activity to rejuvenate the ancient soils. At 859 species in the SWAFR, the Proteaceae is the second largest plant family in the region; most are endemic. This family provides an ideal focus for exploring patterns of diversity. Hakea (Proteaceae) is a genus of ~150 species, with its center of diversity in the SWAFR. I am currently combining phylogeny with physiological and ecological data in order to explore trait evolution and correlations with soil phosphorus in a small focal clade of Hakea endemic to the SWAFR.

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1 - 908 Buena Vista Dr., Tallahassee, FL, 32304, USA
2 -

Keywords:
Australia
Hakea
Proteaceae
phosphorus
cluster roots.

Presentation Type: Oral Paper:Papers for Sections
Session: 54
Location: Delaware B/Hyatt
Date: Wednesday, July 11th, 2012
Time: 5:15 PM
Number: 54015
Abstract ID:562


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