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Highlight IDTitleStrategic Program Area(s)YearStation
Photo of
ID: 100
Biocontrol of Strawberry Guava

First field release of biocontrol agent for managing invasive strawberry guava

Principal Investigator : Tracy Johnson

Invasive Species
Inventory and Monitoring
Resource Management and Use
2012PSW
Photo of Dry forest restoration in Hawai'i. Forest Service
ID: 103
Breaking the Grass-Fire Cycle in Dryland Ecosystems in Hawai'i

Scientists develop practical tools to manage and restore tropical dry forest landscapes on military lands in the Pacific

Principal Investigator : Susan Cordell

Wildland Fire and Fuels
Resource Management and Use
Invasive Species
2012PSW
Photo of Overview of the methodology used to map vegetation carbon stocks throughout Hawaii: a, b the Hawaii State GAP vegetation map provided a geospatial guide for sampling Hawaii Island with airborne Light Detection and Ranging (LiDAR). The LiDAR data were converted to maps of top-of-canopy height (TCH). c A diverse array of satellite-based environmental maps were compiled to provide continuous geographic information on vegetation cover, topographic variables, and climate. d The satellite and LiDAR data were processed through a geostatistical model based on the Random Forest Machine Learning (RFML) approach to develop multi-island, statewide maps of TCH at 30 m spatial resolution. The statewide TCH map was converted to estimates of aboveground carbon density (ACD) using a universal plot-aggregate approach. The modeling process included an estimate of uncertainty on each 30 m grid cell for the entire State of Hawaii.
ID: 1400
Ecosystem carbon storage and productivity across the Hawaiian Islands

Hawaii provides a model system for understanding the effects of environment on ecosystem carbon storage and flux. Forest Service scientists exam ...

Principal Investigator : Christian P. Giardina

Invasive Species
Outdoor Recreation
2017PSW
Photo of
ID: 112
Effects of Rising Temperature on Carbon Cycling and Storage in Ecosystems

Scientists find that as ecosystems warm, they store more carbon, not less

Principal Investigator : Christian P. Giardina

Resource Management and Use
Water, Air, and Soil
Inventory and Monitoring
2012PSW
Photo of Koa tree along Saddle Road on east side of the Big Island of Hawaii.
ID: 1404
Environmental factors associated with genetic variation in the Hawaiian koa tree

Forest Service scientists looked at the association between environmental variables and genetic variation in the endemic Hawaiian tree species, ...

Principal Investigator : Christina Liang

Water, Air, and Soil
Resource Management and Use
2017RMRS
Photo of The greenstrip experiment within a highly flammable grassland environment surrounding an ecosystem fragment on Hawaii Island.
ID: 1337
Greenstrips in Hawaii protect high value ecosystems from fire

The purpose of the greenstrip study was to test a tool that has been used in parts of the arid continental U.S. to protect high value ecosystems ...

Principal Investigator : Susan Cordell

Inventory and Monitoring
Wildland Fire and Fuels
Invasive Species
2017PSW
Photo of
ID: 359
Hawaii Vegetation Fire Risk Web Tool

Fires in Hawai'i are fueled mainly by invasive, perennial grasses, since they maintain aboveground live and senescent biomass throughout the yea ...

Principal Investigator : Susan Cordell

Invasive Species
Wildland Fire and Fuels
2011PSW
Photo of A research plot devoted to undertanding the effects of climate change on carbon storage and flux in Hawaii. Chrisian Giardina, U.S. Department of Agriculture Forest Service.
ID: 1088
Hawai’i Carbon Assessment

Scientists conduct an assessment of current and projected future carbon stocks showing the fluxes and sequestration for the state of Hawai’i.

Principal Investigator : Christian P. Giardina

Invasive Species
Inventory and Monitoring
Water, Air, and Soil
2016PSW
Photo of Forest Service researchers set drift nets to sample larval fish and shrimp that are released to the water column. USDA Forest Service
ID: 919
Impacts of Cimate Change on Pacific Island Streams

Forest Service scientists studied how various ecological and hydrological functions responded to changes in rainfall. Streamflow and metrics all ...

Principal Investigator : Richard A. Mackenzie

Water, Air, and Soil
Inventory and Monitoring
2015PSW
Photo of Image of invasive strawberry guava trees and invasive ginger plants. Christian Giardina, U.S. Department of Agriculture Forest Service.
ID: 1080
Interactive Effects of Climate Change and Invasive Species on Water Yield in Tropical Montane Forests

Forest Service scientists quantify the impact of anticipated climate change and invasive species on water yield from streams using the Distribut ...

Principal Investigator : Christian P. Giardina

Invasive Species
Water, Air, and Soil
2016PSW
Photo of Fish screen installed in a wetland unit at the Hanalai National Wildlife Refuge on Kauai. Fish are removed from the water as it flows through the screen. The fish-free water is then used to flood the wetland unit behind the screen. Richard MacKenzie, USDA Forest Service
ID: 684
Keeping Out Exotic Fish Improves Endangered Hawaiian Waterbird Habitat

Exotic tilapia and mosquito fish are found in aquatic ecosystems throughout the Hawaiian Islands where they degrade native fish and waterbird ha ...

Principal Investigator : Richard A. Mackenzie

Invasive Species
Inventory and Monitoring
Wildlife and Fish
2014PSW
Photo of Koa (Acacia koa) tree. Forestryimages.com.
ID: 1014
Landscape Genomics of Koa Tree (Acacia koa)

Forest Service scientists examined patterns of genetic differentiation throughout the genome of the Hawaiian koa tree (Acacia koa) and associate ...

Principal Investigator : Christina Liang

Inventory and Monitoring2016PSW
Photo of
ID: 235
Large-Scale High-Resolution Forest Carbon Mapping Approach is Cost-Effective

Large-scale biomass mapping is essential to support the United Nations Framework Convention on Climate Change (UNFCCC) program to Reduce Emissio ...

Principal Investigator : Flint Hughes

Water, Air, and Soil2010PSW
Photo of Airborne Carnegie Airborne Observatory-LiDAR image from a January 2008 flight showing vegetation height for more than 100 kipuka on the Island of Hawaii. Inset shows one example kipuka of roughly 25 hectares. Greg Asner, Carnegie Institution of Science
ID: 901
Long-term Fragmentation Reduces Ecosystem Carbon Storage and Productivity

In the naturally fragmented tropical montane landscape in Hawaii, Forest Service researchers used a highly replicated (more than 600) set of fra ...

Principal Investigator : Christian P. Giardina

Inventory and Monitoring
Resource Management and Use
Water, Air, and Soil
2015PSW
Photo of PSW-2017-250; One of the nine research plots located along a five degree Celcius mean annual temperature gradient on the Island of Hawaii; here the field crew is measuring soil respiration and collecting litterfall.
ID: 1399
Long-term warming increases ecosystem nitrogen cycling

In a model ecosystem study where mean annual temperature (MAT) increases with elevation but where many factors such as soils, soil moisture, and ...

Principal Investigator : Christian P. Giardina

Outdoor Recreation
Inventory and Monitoring
2017PSW
Photo of Invasive grass fire in Hawai'i. Susan Cordell, Forest Service
ID: 118
Pacific Fire Exchange Is the Hottest Partnership in the Pacific

A new collaboration promotes and uses the best available science to reduce wildfire management costs and improve land managers' ability to prote ...

Principal Investigator : Susan Cordell

Wildland Fire and Fuels
Resource Management and Use
Invasive Species
2012PSW
Photo of Above ground carbon density across the Kanaihiku section of Nanawale forest reserve and Keauohana Forest Reserve in the Puna District of Hawaii Island. Black boundaries delineate lava flows defined by lava age and type. Specific numbers correspond to lava flows and or dominant vegetation types on lava flows. Jimbo Baldwin, USDA Forest Service
ID: 686
Scientists Assess Carbon Storage in Native Versus Non-native Hawaiian Forests

Forest Service scientists used new and novel techniques based on Light Detection and Ranging (LIDAR)to inventory aboveground carbon in native an ...

Principal Investigator : Flint Hughes

Invasive Species2014PSW
Photo of The image shows that warmer sites have more carbon inputs to the soils and more carbon dioxide release from soil surface; however, carbon storage is unaffected. because it is controlled more by the properties of the soils themselves. Christian Giardina, USDA Forest Service
ID: 679
Soil Carbon Storage in Tropical Montane Forests is Insensitive to Warming

Soils contain more carbon than the atmosphere and all plant biomass combined. There is fear that warming will greatly increase the net release o ...

Principal Investigator : Christian P. Giardina

Water, Air, and Soil2014PSW
Photo of A honey bee. istockphoto.com.
ID: 1013
Strangers at their Doors: Hawaiian Plants and Non-native Pollinators

Forest Service researchers spent 576 hours observing potential pollinators for eight native plant species in a Hawaiian tropical dryland system. ...

Principal Investigator : Christina Liang

Invasive Species
Wildlife and Fish
2016PSW
Photo of The fungus Ceratocystis fimbiata. Flint Hughes, U.S. Department of Agriculture Forest Service.
ID: 1089
Understanding Patterns and Impacts of Rapid ‘?hi?a Death on Native Forests of Hawai’i

Rapid ‘?hi?a Death is a plant disease that has killed large numbers of mature ??hi?a lehua trees on Hawai’i Island during the last several y ...

Principal Investigator : Flint Hughes

Invasive Species2016PSW