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By Naomi Sodetani
During these hot, dry months of summer, wildfire outbreaks are an ever-present danger in Hawai`i.
Because fire poses such a great threat to Hawaii’s native forests, the Conservancy urges hikers and campers to be fire-smart and extra cautious when visiting Conservancy preserves and other forested areas in the Islands.
While most people recognize the obvious threat of fire to forests and other natural areas, many may not know that Hawaii’s ecosystems are even more vulnerable to fire than most ecosystems in the continental United States.
"Unlike their mainland counterparts, Hawaii’s ecosystems are not adaptive to wildfire," says Sam Gon, senior scientist and cultural advisor for the Conservancy's Hawai`i programs. "Except in active volcanic areas, fire is not a part of the natural life cycle of native Hawaiian ecosystems, and only a few native species are able to regenerate after a fire."
According to local biologists, some of our rarest native plants are only a wildfire away from extinction. Whereas the growth of fire-adapted alien plant species can actually be stimulated by a prescribed burn, many native species are either killed or slow to recover, and are often displaced by a resurgence of alien weeds in the wake of the blaze. The void they leave is quickly filled by fire-adapted alien weeds, whose spread displaces native plant species and further increases the risk of future fires. The result: a healthy native system is replaced, perhaps permanently, by an alien one.
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Heavy smoke covers mountainside of Honouliuli Preserve during 2004 Kunia fire |
In 2004 and 2005, four fires threatened or damaged portions of the Conservancy's Honouliuli Preserve in leeward O`ahu. Honouliuli is home to more than 90 different rare and endangered plants and animals, including numerous tree snails and the O`ahu ‘elepaio, an endangered native forest bird.
“Years of work and hundreds of thousands of dollars worth of supplies and human effort can be undone as a result of single, large fire,” said Pauline Sato, who served as the Conservancy's O`ahu program manager during that period.
Ed Misaki, director of the Conservancy's Moloka`i programs, echoes that sentiment. Between 1988 and 1998, Moloka‘i experienced three 10,000-acre-plus fires that impacted the Conservancy's Kamakou Preserve. Previous fires allowed flammable alien grasses to gain a foothold and with each new fire, they spread further. The last major fire in 1998 blackened over 13,000 acres and destroyed some of the last remnants of lowland dry forest and rare species.
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Fire workers battle forest fire on Moloka'i |
Because fire poses such a great threat to Hawaii’s native forests, the Conservancy’s primary wildfire prevention tactic is “pre-suppression.” Basically, pre-suppression consists of minimizing the likelihood of wildfire and maximizing any efforts to alleviate or control potential fire damage.
At each preserve, staff have created access routes for emergency vehicles and helicopter landing zones and maintained wide foot paths to allow firefighters access. Last year, the Conservancy bought a used bulldozer to be employed, among its conservation uses, in responding quickly to create firebreaks in the event of wildfire.
Wildfires threaten our island ecology and economy in far-reaching ways aside from native habitat loss.
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TNC fire fighting staff at 2004 Kunia fire |
Native ecosystems and species provide the foundation of Hawaii’s unique natural and cultural heritage. We all lose every time there is a wildfire because part of what makes Hawai`i such a special place is gone forever. Kama`âina and visitors alike share the responsibility of caring for Hawaii’s fragile environment and its watersheds, to ensure that our special places and cultural traditions will live on.
— Naomi Sodetani
Check out other Conservation Spotlights stories
Nature picture credits (top to bottom, left to right) - all photos © TNC (banner photos, fire workers at 2004 Kunia fire; wildfire raging on Moloka'i).
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