Demographic modeling of Hawaiian silverswords, and its implications for conservation

Author:

Forsyth, Stacey Ann

Title:

Demographic modeling of Hawaiian silverswords, and its implications for conservation

Year:

2002

Volume:

Ph.D.

Pages:

283 leaves

Subject:

Silverswords Argyroxiphium sandwicense ssp. sandwicense Silverswords Haleakala Silverswords Mauna Kea Conservation

Summary:

In this study, the author constructed a matrix population model for a threatened Hawaiian plant species, the Haleakala silversword (Argyroxiphium sandwicense ssp. macrocephalum). Annual variation in seed set and quantified reproductive vital rates were assessed for 5 years. These data, combined with long-term demographic data, were used to construct a stage-based matrix model for the Haleakala silversword. Using this model, I examined temporal and spatial variation in silversword demography. Seeds remained viable in the field for multiple years, suggesting that a seed stage should be incorporated into the matrix model. Management strategies aimed at increasing germination rates or adult survival rates will be most effective in ensuring the persistence of silversword populations.

URL:

http://hdl.handle.net/10150/280173

Collection:

Monographs