Laupahoehoe Wet Forest

The Laupahoehoe Experimental Forest Unit is located on the windward side of the island of Hawaii on the slopes of the Mauna Kea volcano. The 12,300 acre (5,000 ha) site contains magnificent examples of primary wet and rain forest and is the habitat to numerous endangered plant and animal species. A total of 234 vascular plants (native and non-native) have been identified. Among them, 12 are considered rare (known from fewer than 20 locations worldwide or less than 3,000 individuals). Twenty-two bird species (native and non-native) have been observed, including four Federally-listed endangered bird species.

The Laupahoehoe Unit contains native-dominated forested landscapes from lowland forest at 2,300 feet (700 m) above sea level extending through four Holdridge Life Zones to almost 6,200 feet (1,890 m) in elevation. Average annual rainfall of the Unit ranges from 135 inches (3,428 mm) at lower elevations to 69 inches (1,752 mm) at higher elevations. It is part of the largest remaining native dominated forest in Hawaii. Forests are largely dominated by ohia (Metrosideros polymorpha) and koa (Acacia koa), the two most widespread tree species in native forest remaining in Hawaii. In addition, the landscape includes plantations dominated by tropical ash (Fraxinus uhdei) and eucalyptus (Eucalyptus spp.), degraded pastures, abandoned sugarcane fields, and sites dominated by invasive plants and animals. Invasive flora include strawberry guava, clidemia, melastomes, vines, and grasses, while invasive fauna include pigs, rats, various birds (terrestrial) and fish, shrimp, and caddisflies (aquatic). Seven headwater streams originate in the experimental forest provide excellent opportunities to conduct hydrologic and aquatic ecology studies. Streams in the site include two first order tributaries of Kaawalii Stream, Laupahoehoe Stream, Kilau Stream, Kiwilahiahi Stream, Haakoa Stream, and Pahale Stream. Three distinct and continuous soil substrates of differing ages occur along broad elevational ranges.

Elevations below this site are privately owned and adjacent lands at upper elevations are administered by Department of Hawaiian Homelands and the Division of Forestry and Wildlife. Locating an experimental forest within this framework provides researchers with a globally unique opportunity to study environmental gradients from the upper limits of agriculture at lower elevations through 8 Holdridge life zones terminating at the alpine life zone at almost 13,996 feet (4,267 m) in elevation.

A Cultural Assessment produced in 2006 by Kumu Pono Associates, LLC is available here.

For details on the State of Hawaii's land management and administration of the Laupahoehoe Experimental Forest Unit please click here.

The Laupaehoehoe Science and Educaton Center is located on USFS lands in Laupahoehoe. (see Projects/Plans section to learn more).

Maps (click to open)

Laupahoehoe Wet Forest Substrate Age
Laupahoehoe Wet Forest Life Zone
Laupahoehoe Wet Forest Soil Type
Laupahoehoe Wet Forest Sub-units and Geography
Laupahoehoe Wet Forest Vegetation

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