James D Jacobi
Specialty: A major focus of his research has been mapping the distribution of plant communities throughout the Islands initially utilizing photo interpretation and, more recently, digital image analysis.
Research Interests: Hawaiian species and ecosystem conservation; alien species impacts; vegetation ecology; plant community mapping; GIS applications for conservation; plant species and community modeling; vegetation monitoring; assessment of forest bird populations; bringing science to conservation planning.
Personal Interests: The conservation of Hawaiian biodiversity
Education and Certifications
Ph.D. 1990 Botanical Sciences, University of Hawai‘i at Manoa, Honolulu, HI
B.A. 1970 Biology, University of California, Riverside, Riverside, CA
Science and Products
Filter Total Items: 45
ʻŌhiʻa Lehua rainforest: born among Hawaiian volcanoes, evolved in isolation: the story of a dynamic ecosystem with relevance to forests worldwide
In the early 1970s, a multidisciplinary team of forest biologists began a study of Hawaiian ecosystems under the International Biological Program (IBP). Research focus was on the intact native ecosystems in and around Hawai'i Volcanoes National Park, in particular the ʻŌhiʻa Lehua rainforest. Patches of dead ʻŌhiʻa stands had been reported from the windward slopes of Mauna Loa and Mauna Kea. Subse
Authors
Dieter Mueller-Dombois, James D. Jacobi, Hans Juergen Boehmer, Jonathan P. Price
Mapping plant species ranges in the Hawaiian Islands: developing a methodology and associated GIS layers
This report documents a methodology for projecting the geographic ranges of plant species in the Hawaiian Islands. The methodology consists primarily of the creation of several geographic information system (GIS) data layers depicting attributes related to the geographic ranges of plant species. The most important spatial-data layer generated here is an objectively defined classification of climat
Authors
Jonathan P. Price, James D. Jacobi, Samuel M. Gon, Dwight Matsuwaki, Loyal Mehrhoff, Warren Wagner, Matthew Lucas, Barbara Rowe
Survey of roadside alien plants in Hawai`i Volcanoes National Park and adjacent residential areas 2001-2005
The sides of all paved roads of Hawai`i Volcanoes National Park (HAVO) were surveyed on foot in 2001 to 2005, and the roadside presence of 240 target invasive and potentially invasive alien plant species was recorded in mile-long increments. Buffer zones 5–10 miles (8–16 km) long along Highway 11 on either side of the Kīlauea and Kahuku Units of the park, as well as Wright Road that passed by the
Authors
Keali'i F. Bio, Linda W. Pratt, James D. Jacobi
From ridge to reef—linking erosion and changing watersheds to impacts on the coral reef ecosystems of Hawai‘i and the Pacific Ocean
Coral reef ecosystems are threatened by unprecedented watershed changes in the United States and worldwide. These ecosystems sustain fishing and tourism industries essential to the economic survival of many communities. Sediment, nutrients, and pollutants from watersheds are increasingly transported to coastal waters, where these contaminants damage corals. Although pollution from watersheds is on
Authors
Jonathan D. Stock, Susan A. Cochran, Michael E. Field, James D. Jacobi, Gordon Tribble
Baseline survey for rare plant species and native plant communities within the Kamehameha Schools 'Lupea Safe Harbor Planning Project Area, North Kona District, Island of Hawai'i
Kamehameha Schools, in conjunction with several federal, state, and private organizations, has proposed to conduct conservation management on approximately 5,340 ha (~13,200 acres) of land they own in the vicinity of Kīpukalupea in the North Kona District on the island of Hawai'i. The goal of this program is to restore and enhance the habitat to benefit native plant and animal populations that are
Authors
James Jacobi, F. R. Warshauer, Jonathan Price
Status and trends of native birds in the Keauhou and Kilauea forest, Hawai`i Island
A Safe Harbor Agreement (SHA) is a voluntary arrangement between the U.S. Fish and Wildlife Service and non-Federal landowners to promote the protection, conservation, and recovery of listed species without imposing further land use restrictions on the landowners. Kamehameha Schools is considering entering into a SHA for their Keauhou and Kīlauea Forest lands on the island of Hawai′i. Bird surveys
Authors
Richard J. Camp, James D. Jacobi, Thane K. Pratt, P. Marcos Gorresen, Tanya Rubenstein
Effects of invasive alien kahili ginger (Hedychium gardnerianum) on native plant species regeneration in a Hawaiian rainforest
Questions: Does the invasive alien Hedychium gardnerianum (1) replace native understory species, (2) suppress natural regeneration of native plant species, (3) increase the invasiveness of other non-native plants and (4) are native forests are able to recover after removal of H. gardnerianum. Location: A mature rainforest in Hawai'i Volcanoes National Park on the island of Hawai'i (about 1200 m. a
Authors
V. Minden, J.D. Jacobi, S. Porembski, H.J. Boehmer
Assessment of fire behavior and management options in subalpine vegetation on Mauna Kea, Hawai'i
Fire is a major threat to habitat for the endangered Palila (Loxioides bailleui) within subalpine vegetation on Mauna Kea volcano, Hawai‘i. The presence of large amounts of fine fuel from grasses, dry climate, and human ignition sources produces a significant risk of wildfire in this area year-round. The purpose of this report is to provide information on fuels and potential fire behavior that wil
Authors
Jarrod M. Thaxton, James D. Jacobi
Evidence of change in a low-elevation forest bird community of Hawai'i since 1979
We evaluated the abundance and distribution of low-elevation forest birds on windward Hawai'i Island during August 1993-February 1994, and present evidence of changes in the species composition of the forest bird community since 1979. Endemic Hawaiian birds occurred in native-dominated forests as low as 120 m elevation. Non-native species were detected at all survey locations. We observed non-nati
Authors
Michelle H. Reynolds, Richard J. Camp, Bonnie M. B. Nielson, James D. Jacobi
Conservation status and recovery strategies for endemic Hawaiian birds
Populations of endemic Hawaiian birds declined catastrophically following the colonization of the islands by Polynesians and later cultures. Extinction is still occurring, and recovery programs are urgently needed to prevent the disappearance of many other species. Programs to recover the endemic avifauna incorporate a variety of conceptual and practical approaches that are constrained by biologic
Authors
Paul C. Banko, Reginald E. David, James D. Jacobi, Winston E. Banko
Drepanidine movements in relation to food availability in subalpine woodland on Mauna Kea, Hawai'i
Flowers of the mamane tree (Sophoru chrysophylla) are the primary nectar source for Hawaiian honeycreepers in subalpine woodland on Mauna Kea Volcano on the island of Hawai‘i. Mamane seeds are the primary food resource of the endangered Palila (Loxioides bailleui), which is now restricted to subalpine woodland on Mauna Kea. The objectives of this study were to determine the patterns and relative s
Authors
Steven C. Hess, Paul C. Banko, Michelle H. Reynolds, Gregory J. Brenner, Leona P. Laniawe, James D. Jacobi
Factors related to the recovery of subalpine woodland on Mauna Kea, Hawaii
We measured mature tree and sapling density, tree associations, crown size, age structure, recovery from ungulate browsing, and grass cover at four study sites in two types of subalpine woodland on Mauna Kea volcano, island of Hawaii. Beginning in 1981, introduced ungulates were reduced in number to allow regeneration of Sophora chrysophylla (mamane) in habitat supporting the endangered Hawaiian f
Authors
Steven C. Hess, Paul C. Banko, Gregory J. Brenner, James D. Jacobi
Science and Products
Filter Total Items: 45
ʻŌhiʻa Lehua rainforest: born among Hawaiian volcanoes, evolved in isolation: the story of a dynamic ecosystem with relevance to forests worldwide
In the early 1970s, a multidisciplinary team of forest biologists began a study of Hawaiian ecosystems under the International Biological Program (IBP). Research focus was on the intact native ecosystems in and around Hawai'i Volcanoes National Park, in particular the ʻŌhiʻa Lehua rainforest. Patches of dead ʻŌhiʻa stands had been reported from the windward slopes of Mauna Loa and Mauna Kea. Subse
Authors
Dieter Mueller-Dombois, James D. Jacobi, Hans Juergen Boehmer, Jonathan P. Price
Mapping plant species ranges in the Hawaiian Islands: developing a methodology and associated GIS layers
This report documents a methodology for projecting the geographic ranges of plant species in the Hawaiian Islands. The methodology consists primarily of the creation of several geographic information system (GIS) data layers depicting attributes related to the geographic ranges of plant species. The most important spatial-data layer generated here is an objectively defined classification of climat
Authors
Jonathan P. Price, James D. Jacobi, Samuel M. Gon, Dwight Matsuwaki, Loyal Mehrhoff, Warren Wagner, Matthew Lucas, Barbara Rowe
Survey of roadside alien plants in Hawai`i Volcanoes National Park and adjacent residential areas 2001-2005
The sides of all paved roads of Hawai`i Volcanoes National Park (HAVO) were surveyed on foot in 2001 to 2005, and the roadside presence of 240 target invasive and potentially invasive alien plant species was recorded in mile-long increments. Buffer zones 5–10 miles (8–16 km) long along Highway 11 on either side of the Kīlauea and Kahuku Units of the park, as well as Wright Road that passed by the
Authors
Keali'i F. Bio, Linda W. Pratt, James D. Jacobi
From ridge to reef—linking erosion and changing watersheds to impacts on the coral reef ecosystems of Hawai‘i and the Pacific Ocean
Coral reef ecosystems are threatened by unprecedented watershed changes in the United States and worldwide. These ecosystems sustain fishing and tourism industries essential to the economic survival of many communities. Sediment, nutrients, and pollutants from watersheds are increasingly transported to coastal waters, where these contaminants damage corals. Although pollution from watersheds is on
Authors
Jonathan D. Stock, Susan A. Cochran, Michael E. Field, James D. Jacobi, Gordon Tribble
Baseline survey for rare plant species and native plant communities within the Kamehameha Schools 'Lupea Safe Harbor Planning Project Area, North Kona District, Island of Hawai'i
Kamehameha Schools, in conjunction with several federal, state, and private organizations, has proposed to conduct conservation management on approximately 5,340 ha (~13,200 acres) of land they own in the vicinity of Kīpukalupea in the North Kona District on the island of Hawai'i. The goal of this program is to restore and enhance the habitat to benefit native plant and animal populations that are
Authors
James Jacobi, F. R. Warshauer, Jonathan Price
Status and trends of native birds in the Keauhou and Kilauea forest, Hawai`i Island
A Safe Harbor Agreement (SHA) is a voluntary arrangement between the U.S. Fish and Wildlife Service and non-Federal landowners to promote the protection, conservation, and recovery of listed species without imposing further land use restrictions on the landowners. Kamehameha Schools is considering entering into a SHA for their Keauhou and Kīlauea Forest lands on the island of Hawai′i. Bird surveys
Authors
Richard J. Camp, James D. Jacobi, Thane K. Pratt, P. Marcos Gorresen, Tanya Rubenstein
Effects of invasive alien kahili ginger (Hedychium gardnerianum) on native plant species regeneration in a Hawaiian rainforest
Questions: Does the invasive alien Hedychium gardnerianum (1) replace native understory species, (2) suppress natural regeneration of native plant species, (3) increase the invasiveness of other non-native plants and (4) are native forests are able to recover after removal of H. gardnerianum. Location: A mature rainforest in Hawai'i Volcanoes National Park on the island of Hawai'i (about 1200 m. a
Authors
V. Minden, J.D. Jacobi, S. Porembski, H.J. Boehmer
Assessment of fire behavior and management options in subalpine vegetation on Mauna Kea, Hawai'i
Fire is a major threat to habitat for the endangered Palila (Loxioides bailleui) within subalpine vegetation on Mauna Kea volcano, Hawai‘i. The presence of large amounts of fine fuel from grasses, dry climate, and human ignition sources produces a significant risk of wildfire in this area year-round. The purpose of this report is to provide information on fuels and potential fire behavior that wil
Authors
Jarrod M. Thaxton, James D. Jacobi
Evidence of change in a low-elevation forest bird community of Hawai'i since 1979
We evaluated the abundance and distribution of low-elevation forest birds on windward Hawai'i Island during August 1993-February 1994, and present evidence of changes in the species composition of the forest bird community since 1979. Endemic Hawaiian birds occurred in native-dominated forests as low as 120 m elevation. Non-native species were detected at all survey locations. We observed non-nati
Authors
Michelle H. Reynolds, Richard J. Camp, Bonnie M. B. Nielson, James D. Jacobi
Conservation status and recovery strategies for endemic Hawaiian birds
Populations of endemic Hawaiian birds declined catastrophically following the colonization of the islands by Polynesians and later cultures. Extinction is still occurring, and recovery programs are urgently needed to prevent the disappearance of many other species. Programs to recover the endemic avifauna incorporate a variety of conceptual and practical approaches that are constrained by biologic
Authors
Paul C. Banko, Reginald E. David, James D. Jacobi, Winston E. Banko
Drepanidine movements in relation to food availability in subalpine woodland on Mauna Kea, Hawai'i
Flowers of the mamane tree (Sophoru chrysophylla) are the primary nectar source for Hawaiian honeycreepers in subalpine woodland on Mauna Kea Volcano on the island of Hawai‘i. Mamane seeds are the primary food resource of the endangered Palila (Loxioides bailleui), which is now restricted to subalpine woodland on Mauna Kea. The objectives of this study were to determine the patterns and relative s
Authors
Steven C. Hess, Paul C. Banko, Michelle H. Reynolds, Gregory J. Brenner, Leona P. Laniawe, James D. Jacobi
Factors related to the recovery of subalpine woodland on Mauna Kea, Hawaii
We measured mature tree and sapling density, tree associations, crown size, age structure, recovery from ungulate browsing, and grass cover at four study sites in two types of subalpine woodland on Mauna Kea volcano, island of Hawaii. Beginning in 1981, introduced ungulates were reduced in number to allow regeneration of Sophora chrysophylla (mamane) in habitat supporting the endangered Hawaiian f
Authors
Steven C. Hess, Paul C. Banko, Gregory J. Brenner, James D. Jacobi