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Acacia koaia

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Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE TRACHEOPHYTA MAGNOLIOPSIDA FABALES LEGUMINOSAE

Scientific Name: Acacia koaia
Species Authority: Hillebr.
Taxonomic Notes: A taxon which is sometimes included in the wider concept of A. koa A.Gray (also called Racosperma koa (A.Gray) Pedley). It is treated as a separate species here.

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(i,ii,iii) ver 3.1
Year Published: 2003
Assessor/s: Bruegmann, M.M. & Caraway, V.
Reviewer/s: Maunder, M. (Plant Conservation Committee) & Dickinson, T. (Red List Programme Office)
Contributor/s:
Justification:
Acacia koaia occupies less than 20,000 km². Subpopulations are severely fragmented and there is a continued decline in extent of occupancy and habitat. A. koaia is or was a dominant tree in certain areas. However, over most of its range its distribution is very spotty, with patches of trees widely separated. A. koaia occurs at relatively low elevations, and often close to inhabited areas. This species has been severely impacted by ranching, agriculture and fires started by humans. Other threats to the species are feral goats and pigs, deer, and invasive alien plants.
History:
1998 – Vulnerable (Oldfield et al. 1998)
1998 – Vulnerable
1997 – Not Threatened (Walter and Gillett 1998)

Geographic Range [top]

Range Description: A taxon which is included in the wider concept of A. koa by some authors. Recorded from the islands of Kauai, Oahu (a recent find, possibly planted), Molokai, Maui, Lanai, and Hawaii. A. koaia occupies less than 20,000 km²
Countries:
Native:
United States (Hawaiian Is.)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: This is a small and gnarled tree found in dry and open habitats. Sometimes extending into the drier end of the moist habitats. Forests and shrublands.
Systems: Terrestrial

Threats [top]

Major Threat(s): A. koaia has been severely impacted by ranching, agriculture and fires started by humans. Other threats to the species are feral goats and pigs, deer, and invasive alien plants.
Citation: Bruegmann, M.M. & Caraway, V. 2003. Acacia koaia. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 25 May 2013.
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