Assessing Viability of the Haleakalā Silversword to Uncover the Effects of Climate Change on Hawaiˈi’s High-Elevation Ecosystems
Understanding How Climate Change is Affecting Hawai`i’s High-Elevation Ecosystems: An Assessment of the Long-term Viability of Haleakala Silverswords and Associated Biological Communities
Dates
Start Date
2012-09-17
End Date
2016-06-30
Release Date
2012
Summary
Maui’s threatened Haleakalā silversword forms the foundation of a diverse high-elevation community on Haleakalā, and is an ideal species for assessing how this ecosystem is responding to climate change. The silversword’s striking appearance makes it one of Hawaiʻi’s most recognizable species, and it is one of the main attractions drawing 1-2 million tourists to Haleakalā National Park each year. The plant was once considered a conservation success, when active management led to a population recovery in the early 20th century. Unfortunately, silversword populations are now declining, and climate change – namely decreasing precipitation and increasing temperatures – is thought to be responsible. The goal of this project was to collect [...]
Summary
Maui’s threatened Haleakalā silversword forms the foundation of a diverse high-elevation community on Haleakalā, and is an ideal species for assessing how this ecosystem is responding to climate change. The silversword’s striking appearance makes it one of Hawaiʻi’s most recognizable species, and it is one of the main attractions drawing 1-2 million tourists to Haleakalā National Park each year. The plant was once considered a conservation success, when active management led to a population recovery in the early 20th century. Unfortunately, silversword populations are now declining, and climate change – namely decreasing precipitation and increasing temperatures – is thought to be responsible.
The goal of this project was to collect data on both silverswords and climate conditions to pinpoint the exact cause of silversword declines and to predict how the species will fare under potential future climate scenarios. Researchers aimed to identify management strategies that might help restore silversword populations. So far, results have shown that silversword populations have declined by about 60% since 1990, and that this decline coincides with lower rainfall.
The prominence of the silversword within the Hawaiian alpine ecosystem renders it one of the more visible examples of climate change-induced biodiversity loss. Identifying the specific climatic variables that are contributing to the silversword population decline will help Park managers determine which management actions will be necessary to protect this iconic species into the future.
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PI-2012-4_Haleakala_silversword_PaulKrushelnycky2.png “Haleakala Silversword, Maui - Credit: Paul Krushelnycky”
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Copyright_PaulKrushelnycky.pdf “Photo release Paul Krushelnycky”
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Purpose
The Haleakalā silversword plant forms the foundation of a diverse alpine community, and its behavior likely reflects wider ecological responses to climate. This species is already exhibiting patterns of mortality related to climate-driven movement towards higher altitudes. This project aims to understand patterns and causes of recent declines in the Haleakalā silversword population that are associated with decreasing precipitation, increasing temperature, and related climate changes in Hawai`i's high-elevation ecosystems. Building on extensive research and datasets, this study will collect the demographic and climate data needed to construct a robust population model for the silversword and make future population projections under various climate scenarios. In addition, the project will conduct a range of seedling drought tolerance experiments to clarify causes of recent widespread mortality in the species, and determine methods most likely to lead to restoration success.
Project Extension
projectStatus
Completed
Budget Extension
annualBudgets
year
2012
totalFunds
89649.0
year
2012
totalFunds
60998.0
year
2013
totalFunds
47039.0
totalFunds
197686.0
Preview Image
Haleakala Silversword, Maui - Credit: Paul Krushelnycky