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James D Jacobi (Former Employee)

Science and Products

Rocky coastline with rocky island on a sunny day.

Assessing the Potential Effects of Climate Change on Vegetation in Hawaiʻi Volcanoes National Park

Climate change in Hawaiʻi is expected to result in increasing temperatures and varying precipitation through the twenty-first century. Already, high elevation areas have experienced rapidly increasing temperatures and there has been an increase in the frequency of drought across the Islands. These climatic changes could have significant impacts on Hawaiʻi’s plants and animals. Changes in
By
Climate Adaptation Science Centers
Assessing the Potential Effects of Climate Change on Vegetation in Hawaiʻi Volcanoes National Park

Assessing the Potential Effects of Climate Change on Vegetation in Hawaiʻi Volcanoes National Park

Climate change in Hawaiʻi is expected to result in increasing temperatures and varying precipitation through the twenty-first century. Already, high elevation areas have experienced rapidly increasing temperatures and there has been an increase in the frequency of drought across the Islands. These climatic changes could have significant impacts on Hawaiʻi’s plants and animals. Changes in
Learn More
Native Hawaiian plants close up

Modeling Climate-Driven Changes to Vegetation in the Hawaiian Islands

Hawaiʻi is home to a rich diversity of native plants, about 90 percent of which are found nowhere else in the world. However, changing climate conditions may reduce the amount of suitable habitat for native plants and contribute to the spread of invasive plant species. The goal of this project was to better understand how Hawaiian native and invasive plants will respond to climate change
By
Climate Adaptation Science Centers
Modeling Climate-Driven Changes to Vegetation in the Hawaiian Islands

Modeling Climate-Driven Changes to Vegetation in the Hawaiian Islands

Hawaiʻi is home to a rich diversity of native plants, about 90 percent of which are found nowhere else in the world. However, changing climate conditions may reduce the amount of suitable habitat for native plants and contribute to the spread of invasive plant species. The goal of this project was to better understand how Hawaiian native and invasive plants will respond to climate change
Learn More

Hawaii Island biodiversity trends across time and space, 1977 and 2015 Hawaii Island biodiversity trends across time and space, 1977 and 2015

These are the datasets for the Hawaii Forest Bird Survey (HFBS) and the Hawaiian Biodiversity Trends Across Time and Space project that systematically characterized plant and bird communities. The HFBS sampled from transects spanning all major Hawaiian Islands except O'ahu. This extensive dataset has now been organized into a database and associated geographic information system (GIS)...
By
Pacific Island Ecosystems Research Center

Molokai (Kawela) USGS ridge-to-reef vegetation monitoring study 2009-2014 Molokai (Kawela) USGS ridge-to-reef vegetation monitoring study 2009-2014

This data release contains two files: 1) the raw data collected as part of a vegetation monitoring study that was conducted to assess the changes in plant species frequency inside and outside a fenced exclosure, constructed to eliminate browsing and grazing by feral goats, from 2009-2014 in the US Geological Survey's Kawela research site on the island of Molokai, Hawaii. 2) A list of...
By
Pacific Island Ecosystems Research Center

Hawaiian Islands Coastal Vegetation Survey 2013-2015 Hawaiian Islands Coastal Vegetation Survey 2013-2015

This dataset provides information on the current status and various other habitat and descriptive attributes of the native coastal vegetation for seven of the main Hawaiian Islands (i.e., does not include Niihau). This study was focused on identifying sites that still retain relatively intact and highly diverse native coastal plant communities throughout seven of the main Hawaiian...
By
Pacific Island Ecosystems Research Center

Hawaii Land Cover and Habitat Status Hawaii Land Cover and Habitat Status

These two raster data layers depict the land cover and degree of human disturbance to plant communities on the seven main Hawaiian Islands, and were developed as part of a comprehensive USGS assessment of carbon sequestration potential by natural ecosystems in the State of Hawaii.
By
Western Geographic Science Center
No results found.
Filter Total Items: 51

Updates for Wake Atoll biosecurity management, biological control, survey, and management, and integrated pest management plans Updates for Wake Atoll biosecurity management, biological control, survey, and management, and integrated pest management plans

Pests and invasive species have been defined as any organism that can have real or perceived adverse effects on operations, or the well-being of personnel, native plants, animals, their environment and ecosystem processes; attack or damage real property, supplies, equipment, or are otherwise undesirable (paraphrased from many sources including 53 Federal Register [FR] 15975, May 4, 1988...
Authors
Stacie A. Hathaway, James D. Jacobi, Robert Peck, Robert N. Fisher
By
Ecosystems Mission Area, Pacific Island Ecosystems Research Center, Western Ecological Research Center (WERC)

Landscape level effects of invasive plants and animals on water infiltration through Hawaiian tropical forests Landscape level effects of invasive plants and animals on water infiltration through Hawaiian tropical forests

Watershed degradation due to invasion threatens downstream water flows and associated ecosystem services. While this topic has been studied across landscapes that have undergone invasive-driven state changes (e.g., native forest to invaded grassland), it is less well understood in ecosystems experiencing within-system invasion (e.g. native forest to invaded forest). To address this...
Authors
Lucas Fortini, Christina Leopold, Kimberlie Perkins, Oliver A. Chadwick, Stephanie G. Yelenik, James D. Jacobi, Kaiena Bishaw, Makani Gregg
By
Ecosystems Mission Area, Pacific Island Ecosystems Research Center

Local to landscape-level controls of water fluxes through Hawaiian forests: Effects of invasive animals and plants on soil infiltration capacity across substrate and moisture gradients Local to landscape-level controls of water fluxes through Hawaiian forests: Effects of invasive animals and plants on soil infiltration capacity across substrate and moisture gradients

Given the potential effect of invasive plants and animals to water fluxes through forests, the invasive-driven degradation of native ecosystems is a topic of great concern for many downstream land and water managers. The infiltration rate determines the partitioning between runoff and infiltration into soil in Hawaiian forests and beyond. Thus, to explore the ecohydrological effects of...
Authors
Lucas B. Fortini, Christina Leopold, Kimberlie Perkins, Oliver A. Chadwick, Stephanie G. Yelenik, James D. Jacobi, Kaiena Bishaw, Makani Gregg, Sarah N. Rosa
By
Ecosystems Mission Area, Water Resources Mission Area, Pacific Island Ecosystems Research Center, Pacific Islands Water Science Center

Successful restoration of Metrosideros polymorpha (ʻōhiʻa) is possible in forest sites with active Rapid ‘Ōhiʻa Death infections Successful restoration of Metrosideros polymorpha (ʻōhiʻa) is possible in forest sites with active Rapid ‘Ōhiʻa Death infections

Rapid ʻŌhiʻa Death (ROD), caused by the fungal pathogen Ceratocystis, is killing large numbers of ʻōhiʻa trees (Metrosideros polymorpha) in Hawaiʻi. ʻŌhiʻa are a dominant tree in Hawaiian forests, have a range that goes from arid to wet forest climates, and are important for endangered species habitat and ecosystem function. To test whether actively planting ʻōhiʻa seedlings is a viable
Authors
Stephanie G. Yelenik, Kylle Roy, Jeff Stallman
By
Ecosystems Mission Area, Pacific Island Ecosystems Research Center

The evolving threat of rapid Ohia death (ROD) to Hawaii’s native ecosystems and rare plant species The evolving threat of rapid Ohia death (ROD) to Hawaii’s native ecosystems and rare plant species

Hawai‘i’s most widespread native tree, ‘ōhi‘a lehua (Metrosideros polymorpha), has been dying across large areas of Hawai‘i Island mainly due to two fungal pathogens (Ceratocystis lukuohia and Ceratocystis huliohia) that cause a disease collectively known as Rapid ‘Ōhi‘a Death (ROD). Here we examine patterns of positive detections of C. lukuohia as it has been linked to the larger...
Authors
Lucas B. Fortini, Lauren R. Kaiser, Lisa Keith, Jonathan Price, R. Flint Hughes, James D. Jacobi, J. B. Friday
By
Ecosystems Mission Area, Pacific Island Ecosystems Research Center

Regeneration of Metrosideros polymorpha forests in Hawaii after landscape‐level canopy dieback Regeneration of Metrosideros polymorpha forests in Hawaii after landscape‐level canopy dieback

Questions (a) Have Metrosideros polymorpha trees become re‐established in Hawaiian forests previously impacted by canopy dieback in the 1970s? (b) Has canopy dieback expanded since the 1970s? (c) Can spatial patterns from this dieback be correlated with habitat factors to model future dieback in this area? Study Site An 83,603 ha study area on the eastern slopes of Mauna Loa and Mauna...
Authors
Linda Mertelmeyer, James D. Jacobi, Dieter Mueller-Dombois, Kevin W. Brinck, Hans Juergen Boehmer
By
Ecosystems Mission Area, Pacific Island Ecosystems Research Center

Science and Products

Rocky coastline with rocky island on a sunny day.

Assessing the Potential Effects of Climate Change on Vegetation in Hawaiʻi Volcanoes National Park

Climate change in Hawaiʻi is expected to result in increasing temperatures and varying precipitation through the twenty-first century. Already, high elevation areas have experienced rapidly increasing temperatures and there has been an increase in the frequency of drought across the Islands. These climatic changes could have significant impacts on Hawaiʻi’s plants and animals. Changes in
By
Climate Adaptation Science Centers
Assessing the Potential Effects of Climate Change on Vegetation in Hawaiʻi Volcanoes National Park

Assessing the Potential Effects of Climate Change on Vegetation in Hawaiʻi Volcanoes National Park

Climate change in Hawaiʻi is expected to result in increasing temperatures and varying precipitation through the twenty-first century. Already, high elevation areas have experienced rapidly increasing temperatures and there has been an increase in the frequency of drought across the Islands. These climatic changes could have significant impacts on Hawaiʻi’s plants and animals. Changes in
Learn More
Native Hawaiian plants close up

Modeling Climate-Driven Changes to Vegetation in the Hawaiian Islands

Hawaiʻi is home to a rich diversity of native plants, about 90 percent of which are found nowhere else in the world. However, changing climate conditions may reduce the amount of suitable habitat for native plants and contribute to the spread of invasive plant species. The goal of this project was to better understand how Hawaiian native and invasive plants will respond to climate change
By
Climate Adaptation Science Centers
Modeling Climate-Driven Changes to Vegetation in the Hawaiian Islands

Modeling Climate-Driven Changes to Vegetation in the Hawaiian Islands

Hawaiʻi is home to a rich diversity of native plants, about 90 percent of which are found nowhere else in the world. However, changing climate conditions may reduce the amount of suitable habitat for native plants and contribute to the spread of invasive plant species. The goal of this project was to better understand how Hawaiian native and invasive plants will respond to climate change
Learn More

Hawaii Island biodiversity trends across time and space, 1977 and 2015 Hawaii Island biodiversity trends across time and space, 1977 and 2015

These are the datasets for the Hawaii Forest Bird Survey (HFBS) and the Hawaiian Biodiversity Trends Across Time and Space project that systematically characterized plant and bird communities. The HFBS sampled from transects spanning all major Hawaiian Islands except O'ahu. This extensive dataset has now been organized into a database and associated geographic information system (GIS)...
By
Pacific Island Ecosystems Research Center

Molokai (Kawela) USGS ridge-to-reef vegetation monitoring study 2009-2014 Molokai (Kawela) USGS ridge-to-reef vegetation monitoring study 2009-2014

This data release contains two files: 1) the raw data collected as part of a vegetation monitoring study that was conducted to assess the changes in plant species frequency inside and outside a fenced exclosure, constructed to eliminate browsing and grazing by feral goats, from 2009-2014 in the US Geological Survey's Kawela research site on the island of Molokai, Hawaii. 2) A list of...
By
Pacific Island Ecosystems Research Center

Hawaiian Islands Coastal Vegetation Survey 2013-2015 Hawaiian Islands Coastal Vegetation Survey 2013-2015

This dataset provides information on the current status and various other habitat and descriptive attributes of the native coastal vegetation for seven of the main Hawaiian Islands (i.e., does not include Niihau). This study was focused on identifying sites that still retain relatively intact and highly diverse native coastal plant communities throughout seven of the main Hawaiian...
By
Pacific Island Ecosystems Research Center

Hawaii Land Cover and Habitat Status Hawaii Land Cover and Habitat Status

These two raster data layers depict the land cover and degree of human disturbance to plant communities on the seven main Hawaiian Islands, and were developed as part of a comprehensive USGS assessment of carbon sequestration potential by natural ecosystems in the State of Hawaii.
By
Western Geographic Science Center
No results found.
Filter Total Items: 51

Updates for Wake Atoll biosecurity management, biological control, survey, and management, and integrated pest management plans Updates for Wake Atoll biosecurity management, biological control, survey, and management, and integrated pest management plans

Pests and invasive species have been defined as any organism that can have real or perceived adverse effects on operations, or the well-being of personnel, native plants, animals, their environment and ecosystem processes; attack or damage real property, supplies, equipment, or are otherwise undesirable (paraphrased from many sources including 53 Federal Register [FR] 15975, May 4, 1988...
Authors
Stacie A. Hathaway, James D. Jacobi, Robert Peck, Robert N. Fisher
By
Ecosystems Mission Area, Pacific Island Ecosystems Research Center, Western Ecological Research Center (WERC)

Landscape level effects of invasive plants and animals on water infiltration through Hawaiian tropical forests Landscape level effects of invasive plants and animals on water infiltration through Hawaiian tropical forests

Watershed degradation due to invasion threatens downstream water flows and associated ecosystem services. While this topic has been studied across landscapes that have undergone invasive-driven state changes (e.g., native forest to invaded grassland), it is less well understood in ecosystems experiencing within-system invasion (e.g. native forest to invaded forest). To address this...
Authors
Lucas Fortini, Christina Leopold, Kimberlie Perkins, Oliver A. Chadwick, Stephanie G. Yelenik, James D. Jacobi, Kaiena Bishaw, Makani Gregg
By
Ecosystems Mission Area, Pacific Island Ecosystems Research Center

Local to landscape-level controls of water fluxes through Hawaiian forests: Effects of invasive animals and plants on soil infiltration capacity across substrate and moisture gradients Local to landscape-level controls of water fluxes through Hawaiian forests: Effects of invasive animals and plants on soil infiltration capacity across substrate and moisture gradients

Given the potential effect of invasive plants and animals to water fluxes through forests, the invasive-driven degradation of native ecosystems is a topic of great concern for many downstream land and water managers. The infiltration rate determines the partitioning between runoff and infiltration into soil in Hawaiian forests and beyond. Thus, to explore the ecohydrological effects of...
Authors
Lucas B. Fortini, Christina Leopold, Kimberlie Perkins, Oliver A. Chadwick, Stephanie G. Yelenik, James D. Jacobi, Kaiena Bishaw, Makani Gregg, Sarah N. Rosa
By
Ecosystems Mission Area, Water Resources Mission Area, Pacific Island Ecosystems Research Center, Pacific Islands Water Science Center

Successful restoration of Metrosideros polymorpha (ʻōhiʻa) is possible in forest sites with active Rapid ‘Ōhiʻa Death infections Successful restoration of Metrosideros polymorpha (ʻōhiʻa) is possible in forest sites with active Rapid ‘Ōhiʻa Death infections

Rapid ʻŌhiʻa Death (ROD), caused by the fungal pathogen Ceratocystis, is killing large numbers of ʻōhiʻa trees (Metrosideros polymorpha) in Hawaiʻi. ʻŌhiʻa are a dominant tree in Hawaiian forests, have a range that goes from arid to wet forest climates, and are important for endangered species habitat and ecosystem function. To test whether actively planting ʻōhiʻa seedlings is a viable
Authors
Stephanie G. Yelenik, Kylle Roy, Jeff Stallman
By
Ecosystems Mission Area, Pacific Island Ecosystems Research Center

The evolving threat of rapid Ohia death (ROD) to Hawaii’s native ecosystems and rare plant species The evolving threat of rapid Ohia death (ROD) to Hawaii’s native ecosystems and rare plant species

Hawai‘i’s most widespread native tree, ‘ōhi‘a lehua (Metrosideros polymorpha), has been dying across large areas of Hawai‘i Island mainly due to two fungal pathogens (Ceratocystis lukuohia and Ceratocystis huliohia) that cause a disease collectively known as Rapid ‘Ōhi‘a Death (ROD). Here we examine patterns of positive detections of C. lukuohia as it has been linked to the larger...
Authors
Lucas B. Fortini, Lauren R. Kaiser, Lisa Keith, Jonathan Price, R. Flint Hughes, James D. Jacobi, J. B. Friday
By
Ecosystems Mission Area, Pacific Island Ecosystems Research Center

Regeneration of Metrosideros polymorpha forests in Hawaii after landscape‐level canopy dieback Regeneration of Metrosideros polymorpha forests in Hawaii after landscape‐level canopy dieback

Questions (a) Have Metrosideros polymorpha trees become re‐established in Hawaiian forests previously impacted by canopy dieback in the 1970s? (b) Has canopy dieback expanded since the 1970s? (c) Can spatial patterns from this dieback be correlated with habitat factors to model future dieback in this area? Study Site An 83,603 ha study area on the eastern slopes of Mauna Loa and Mauna...
Authors
Linda Mertelmeyer, James D. Jacobi, Dieter Mueller-Dombois, Kevin W. Brinck, Hans Juergen Boehmer
By
Ecosystems Mission Area, Pacific Island Ecosystems Research Center
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