Argyroxiphium sandwicense
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Through Endemism and Climate change
- Haleakala silversword (A. sandwicense subsp. macrocephalum) is found on the mountain Haleakalā on the island of Maui at elevations above 2,100 m (6,900 ft). It is a federally listed threatened species.
- Mauna Kea silversword (A. sandwicense subsp. sandwicense) is found on the mountain Mauna Kea on the Hawaii Island at elevations above 2,600 m (8,500 ft). It is a federally listed endangered species. As few as 40 individuals are left.
Reproduction
The silversword flowers only once in its lifespan of 20 to 90 years.
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Natural history
One of the reasons that the silversword is now an endangered species is the introduction of foreign hoofed mammals (ungulates) by European colonizers. As the population of ungulates (most notably sheep) grew, the population of silversword decreased (Robichaux, 1997).
Threats
One study found that it may not survive climate change.
More in Statistics
Mortality rateDeaths per 1,000 individuals per yearSystematic reviewComprehensive review of research literature using systematic methodsSensitivity and specificityStatistical measure of a binary classificationLongitudinal studyStudy with repeated observations over timePrevalenceNumber of disease cases in a given population at a specific timeStochasticRandomly determined process