Overlooking the Alaka‘i Plateau from the Alaka‘i Swamp trailhead, Kaua‘i, Hawai‘i.
Dennis LaPointe (Former Employee)
Science and Products
eDNA to Inform Invasive Mosquito Distribution
We are using environmental DNA samples to assess habitat occupancy of the invasive southern house mosquito in Kīpahulu Valley, Maui. An understanding of mosquito distribution is critical to developing and implementing tools to prevent the transmission of avian malaria, a primary threat to Hawaiian forest birds.
Identifying Genetic Diversity of Wolbachia Bacteria for Mosquito Control
We are sequencing the DNA of Wolbachia bacteria found in mosquito populations in Hawai’i and those used for mosquito control. We are also developing sample processing techniques to increase the efficiency and accuracy of monitoring mosquito control efforts to help long-term survival and restoration of Hawaiian forest bird populations.
Predicting and Mitigating the Threat of Avian Disease to Forest Birds at Hakalau Forest National Wildlife Refuge
Hawaiʻi’s native forest birds are known worldwide for their diversity and beauty. Unfortunately, many species are heading towards extinction because of bird malaria spread by mosquitoes introduced over a century ago. Remaining populations of these highly threatened forest birds tend to be at high elevations near the tree line on mountains, where cooler temperatures limit mosquitoes and...
New Technologies and Groundwork for Mosquito Control in the Alakai Plateau
Introduced mosquito-borne avian diseases, avian pox and avian malaria, are key limiting factors for endemic Hawaiian forest birds and are, in part, likely responsible for past extinctions and the continued decline of extant species populations. In the last 40 years on the island of Kaua‘i a number of species have become increasingly rare and several are now presumed extinct. Coinciding with these...
Avian Pathogens and Vectors - Kahuku Unit of Hawai'i Volcanoes National Park
While the Hawaiian avian disease system has been well-studied in the forests of the older section of Hawai‘i Volcanoes National Park (HAVO), and in many other locations throughout the state, nothing was known about avian disease in the new Kahuku Unit of HAVO and the adjacent Ka‘u Forest Reserve. The high elevation forests of Kahuku are the only habitat located on National Park Service lands where...
Mosquito Vectors of Dengue and Zika Viruses in Hawaii National Parks
Six species of biting mosquitoes have been introduced to the Hawaiian Islands since Western contact, two of which are vectors of dengue, chikungunya, and Zika viruses. Environmental conditions favorable for the transmission of dengue and Zika occur year-long across Hawai‘i’s coastline. To better understand the ecology of vector mosquitoes and support public health efforts, mosquito monitoring at...
Island of Hawaiʻi mosquito, hydrological, and environmental data from riparian habitats, 2022-2024 Island of Hawaiʻi mosquito, hydrological, and environmental data from riparian habitats, 2022-2024
This data release includes 12 data files documenting climatic, hydrologic, and mosquito variables collected at seven riparian study sites on three streams located on the windward flank of Mauna Kea on the Island of Hawai'i from 2022 to 2024. Daily ambient temperature, ambient relative humidity, cumulative precipitation, stream pool water temperatures, and stream height (stage) were...
Kīpahulu Valley, Haleakalā National Park, Maui bird, mosquito, and avian malaria infection data, 2002 and 2019 Kīpahulu Valley, Haleakalā National Park, Maui bird, mosquito, and avian malaria infection data, 2002 and 2019
This data publication contains data files collected as part of a field and laboratory effort aimed at estimating the prevalence and altitudinal distribution of avian malaria in forest birds and in the primary vector of malaria in Hawaii, Culex quinquefasciatus in Kīpahulu Valley, Haleakalā National Park, on the island of Maui in 2002 and 2019. To track the spread of mosquitoes and...
Kīpahulu Valley, Haleakalā National Park, Maui, Field and Lab-based eDNA Proof-of-concept Study for the Detection of Culex quinquefasciatus 2022-2025 Kīpahulu Valley, Haleakalā National Park, Maui, Field and Lab-based eDNA Proof-of-concept Study for the Detection of Culex quinquefasciatus 2022-2025
A leading contributor to the decline of Hawaiian forest birds is avian malaria caused by the protozoan parasite Plasmodium relictum and that is transmitted by the Southern House Mosquito (Culex quinquefasciatus). For conservation purposes, landscape-scale mosquito control techniques are being considered to disrupt the malaria disease cycle in key Hawaiian forest bird habitats. The...
Upper Waiākea Forest Reserve, Island of Hawai'i, Trap Efficacy and Mark-Release-Recapture Trial of Culex quinquefasciatus, 2020-2024 Upper Waiākea Forest Reserve, Island of Hawai'i, Trap Efficacy and Mark-Release-Recapture Trial of Culex quinquefasciatus, 2020-2024
This USGS data release consists of five data sets and accompanying metadata for an experimental mark-release-recapture (MMR) study of adult Culex quinquefasciatus conducted in a montane rainforest in Upper Waiākea Forest Reserve on the Island of Hawai'i from October-December 2020 and laboratory survivorship studies and analysis from 2021- 2024. Culex quinquefasciatus is the vector of the...
Kīpahulu Valley, Haleakalā National Park, Maui Seasonal Distribution and Relative Abundance of the Mosquito Culex quinquefasciatus, 2022-2023 (ver. 2.0, March 2026) Kīpahulu Valley, Haleakalā National Park, Maui Seasonal Distribution and Relative Abundance of the Mosquito Culex quinquefasciatus, 2022-2023 (ver. 2.0, March 2026)
This USGS data release consists of six data sets and accompanying metadata for a year-long study on the seasonal distribution and relative abundance of the southern house mosquito Culex quinquefasciatus in Kīpahulu Valley, Haleakalā National Park, critical habitat for two endangered Maui endemic forest birds. Culex quinquefasciatus is the vector of the avian malaria Plasmodium relictum...
Island of Hawaii bird, mosquito, and avian malaria infection data 2001-2004 Island of Hawaii bird, mosquito, and avian malaria infection data 2001-2004
This data publication contains data files collected as part of a field, laboratory, and modeling effort aimed at uncovering ecological drivers of avian malaria transmission and impacts on Hawaiian honeycreepers across an elevational gradient on the eastern flank of Mauna Loa and Kilauea volcanoes on Hawaii Island. From 2001-2004, mosquito and bird data were collected at nine sites...
Overlooking the Alaka‘i Plateau from the Alaka‘i Swamp trailhead, Kaua‘i, Hawai‘i.
Filter Total Items: 53
Getting ahead of the crises: Developing an avian malaria disease management plan for Hawaiian forest birds Getting ahead of the crises: Developing an avian malaria disease management plan for Hawaiian forest birds
Avian malaria is an existential threat to a majority of native Hawaiian forest birds. Climate change is facilitating the spread of malaria to historically disease-free areas, and despite the risk of native Hawaiian forest bird extinctions from malaria outbreaks, no comprehensive disease management plans exist for forest bird conservation areas. Hakalau Forest National Wildlife Refuge...
Authors
Eben H. Paxton, Eldridge Naboa, Nicholas R. Agorastos, Donna L. Ball, Lucas Berio Fortini, Thomas Cady, Richard J. Camp, Patrick J. Hart, Springer Kaye, Steven J. Kendall, Dennis A. LaPointe, Ricardo D. Lopez, Katherine Maria McClure, Amanda K Navine
Population genomics of Aedes albopictus across remote Pacific islands for genetic biocontrol considerations Population genomics of Aedes albopictus across remote Pacific islands for genetic biocontrol considerations
Remote Pacific islands (RPI) are characterized by ecological isolation, diverse endemic species, and vulnerability to invasive organisms due to globalization-driven connectivity. Among these species, Aedes albopictus, a highly invasive vector of flaviviruses, has spread extensively across the RPI via human-mediated dispersal, posing significant health and economic burdens. While the...
Authors
Sangwoo Seok, Adam E. Vorsino, Travis C. Collier, Limb Hapairai, Christopher M. Jacobsen, Jeomhee M. Hasty, Ana L. Romero-Weaver, Eva A. Buckner, Dennis A. LaPointe, Mark Leong, Leo Braack, Christine A. Tabuloc, Joanna C. Chiu, Robyn Raban, Omar S. Akbari, Yoosook Lee
Assessing mosquito populations to limit the spread of avian disease and inform the conservation of Hawaiian forest birds Assessing mosquito populations to limit the spread of avian disease and inform the conservation of Hawaiian forest birds
The introduced mosquito-borne avian malaria, Plasmodium relictum, along with its mosquito vector, Culex quinquefasciatus, are key limiting factors for endemic Hawaiian forest birds and are, in part, responsible for past extinctions and continued population declines of extant species. In the last 10 years steep declines in forest bird populations have been documented on Kaua`i and Maui...
Authors
Dennis A. LaPointe
Environmental and geographical factors influence the occurrence and abundance of the southern house mosquito, Culex quinquefasciatus, in Hawai‘i Environmental and geographical factors influence the occurrence and abundance of the southern house mosquito, Culex quinquefasciatus, in Hawai‘i
Hawaiian honeycreepers, a group of endemic Hawaiian forest birds, are being threatened by avian malaria, a non-native disease that is driving honeycreepers populations to extinction. Avian malaria is caused by the parasite Plasmodium relictum, which is transmitted by the invasive mosquito Culex quinquefasciatus. Environmental and geographical factors play an important role in shaping...
Authors
Oswaldo Villena, Katherine Maria McClure, Richard J. Camp, Dennis A. LaPointe, Carter T. Atkinson, Helen Sofaer, Lucas Berio Fortini
Hawai‘i forest review: Synthesizing the ecology, evolution, and conservation of a model system Hawai‘i forest review: Synthesizing the ecology, evolution, and conservation of a model system
As the most remote archipelago in the world, the Hawaiian Islands are home to a highly endemic and disharmonic biota that has fascinated biologists for centuries. Forests are the dominant terrestrial biome in Hawai‘i, spanning complex, heterogeneous climates across substrates that vary tremendously in age, soil structure, and nutrient availability. Species richness is low in Hawaiian...
Authors
Kasey Barton, Andrea Westerband, Rebecca Ostertag, Elizabeth Stacy, Kawika Winter, Don Drake, Lucas Berio Fortini, Creighton M Litton, Susan Cordell, Paul Krushelnycky, Kapua Kawelo, Kealoha Feliciano, Gordon Bennett, Tiffany Knight
Field trials to test new trap technologies for monitoring Culex populations and the efficacy of the biopesticide formulation VectoMax® FG for control of larval Culex quinquefasciatus in the Alaka'i Plateau, Kaua'i, Hawaii Field trials to test new trap technologies for monitoring Culex populations and the efficacy of the biopesticide formulation VectoMax® FG for control of larval Culex quinquefasciatus in the Alaka'i Plateau, Kaua'i, Hawaii
Mosquito-borne avian malaria Plasmodium relictum is a key limiting factor for endemic Hawaiian forest birds. In the past decade, populations of Kaua‘i’s endemic forest birds have been in a steep decline due to an increase in malaria transmission. To evaluate the use of available biopesticides for short-term mosquito control we tested the efficacy of the biopesticide VectoMax® FG against...
Authors
Dennis A. LaPointe, Theodore V. Black, Michael Riney, Grace Tredinnick, Lisa H. Crampton, Justin Hite
Science and Products
eDNA to Inform Invasive Mosquito Distribution
We are using environmental DNA samples to assess habitat occupancy of the invasive southern house mosquito in Kīpahulu Valley, Maui. An understanding of mosquito distribution is critical to developing and implementing tools to prevent the transmission of avian malaria, a primary threat to Hawaiian forest birds.
Identifying Genetic Diversity of Wolbachia Bacteria for Mosquito Control
We are sequencing the DNA of Wolbachia bacteria found in mosquito populations in Hawai’i and those used for mosquito control. We are also developing sample processing techniques to increase the efficiency and accuracy of monitoring mosquito control efforts to help long-term survival and restoration of Hawaiian forest bird populations.
Predicting and Mitigating the Threat of Avian Disease to Forest Birds at Hakalau Forest National Wildlife Refuge
Hawaiʻi’s native forest birds are known worldwide for their diversity and beauty. Unfortunately, many species are heading towards extinction because of bird malaria spread by mosquitoes introduced over a century ago. Remaining populations of these highly threatened forest birds tend to be at high elevations near the tree line on mountains, where cooler temperatures limit mosquitoes and...
New Technologies and Groundwork for Mosquito Control in the Alakai Plateau
Introduced mosquito-borne avian diseases, avian pox and avian malaria, are key limiting factors for endemic Hawaiian forest birds and are, in part, likely responsible for past extinctions and the continued decline of extant species populations. In the last 40 years on the island of Kaua‘i a number of species have become increasingly rare and several are now presumed extinct. Coinciding with these...
Avian Pathogens and Vectors - Kahuku Unit of Hawai'i Volcanoes National Park
While the Hawaiian avian disease system has been well-studied in the forests of the older section of Hawai‘i Volcanoes National Park (HAVO), and in many other locations throughout the state, nothing was known about avian disease in the new Kahuku Unit of HAVO and the adjacent Ka‘u Forest Reserve. The high elevation forests of Kahuku are the only habitat located on National Park Service lands where...
Mosquito Vectors of Dengue and Zika Viruses in Hawaii National Parks
Six species of biting mosquitoes have been introduced to the Hawaiian Islands since Western contact, two of which are vectors of dengue, chikungunya, and Zika viruses. Environmental conditions favorable for the transmission of dengue and Zika occur year-long across Hawai‘i’s coastline. To better understand the ecology of vector mosquitoes and support public health efforts, mosquito monitoring at...
Island of Hawaiʻi mosquito, hydrological, and environmental data from riparian habitats, 2022-2024 Island of Hawaiʻi mosquito, hydrological, and environmental data from riparian habitats, 2022-2024
This data release includes 12 data files documenting climatic, hydrologic, and mosquito variables collected at seven riparian study sites on three streams located on the windward flank of Mauna Kea on the Island of Hawai'i from 2022 to 2024. Daily ambient temperature, ambient relative humidity, cumulative precipitation, stream pool water temperatures, and stream height (stage) were...
Kīpahulu Valley, Haleakalā National Park, Maui bird, mosquito, and avian malaria infection data, 2002 and 2019 Kīpahulu Valley, Haleakalā National Park, Maui bird, mosquito, and avian malaria infection data, 2002 and 2019
This data publication contains data files collected as part of a field and laboratory effort aimed at estimating the prevalence and altitudinal distribution of avian malaria in forest birds and in the primary vector of malaria in Hawaii, Culex quinquefasciatus in Kīpahulu Valley, Haleakalā National Park, on the island of Maui in 2002 and 2019. To track the spread of mosquitoes and...
Kīpahulu Valley, Haleakalā National Park, Maui, Field and Lab-based eDNA Proof-of-concept Study for the Detection of Culex quinquefasciatus 2022-2025 Kīpahulu Valley, Haleakalā National Park, Maui, Field and Lab-based eDNA Proof-of-concept Study for the Detection of Culex quinquefasciatus 2022-2025
A leading contributor to the decline of Hawaiian forest birds is avian malaria caused by the protozoan parasite Plasmodium relictum and that is transmitted by the Southern House Mosquito (Culex quinquefasciatus). For conservation purposes, landscape-scale mosquito control techniques are being considered to disrupt the malaria disease cycle in key Hawaiian forest bird habitats. The...
Upper Waiākea Forest Reserve, Island of Hawai'i, Trap Efficacy and Mark-Release-Recapture Trial of Culex quinquefasciatus, 2020-2024 Upper Waiākea Forest Reserve, Island of Hawai'i, Trap Efficacy and Mark-Release-Recapture Trial of Culex quinquefasciatus, 2020-2024
This USGS data release consists of five data sets and accompanying metadata for an experimental mark-release-recapture (MMR) study of adult Culex quinquefasciatus conducted in a montane rainforest in Upper Waiākea Forest Reserve on the Island of Hawai'i from October-December 2020 and laboratory survivorship studies and analysis from 2021- 2024. Culex quinquefasciatus is the vector of the...
Kīpahulu Valley, Haleakalā National Park, Maui Seasonal Distribution and Relative Abundance of the Mosquito Culex quinquefasciatus, 2022-2023 (ver. 2.0, March 2026) Kīpahulu Valley, Haleakalā National Park, Maui Seasonal Distribution and Relative Abundance of the Mosquito Culex quinquefasciatus, 2022-2023 (ver. 2.0, March 2026)
This USGS data release consists of six data sets and accompanying metadata for a year-long study on the seasonal distribution and relative abundance of the southern house mosquito Culex quinquefasciatus in Kīpahulu Valley, Haleakalā National Park, critical habitat for two endangered Maui endemic forest birds. Culex quinquefasciatus is the vector of the avian malaria Plasmodium relictum...
Island of Hawaii bird, mosquito, and avian malaria infection data 2001-2004 Island of Hawaii bird, mosquito, and avian malaria infection data 2001-2004
This data publication contains data files collected as part of a field, laboratory, and modeling effort aimed at uncovering ecological drivers of avian malaria transmission and impacts on Hawaiian honeycreepers across an elevational gradient on the eastern flank of Mauna Loa and Kilauea volcanoes on Hawaii Island. From 2001-2004, mosquito and bird data were collected at nine sites...
Overlooking the Alaka‘i Plateau, Kaua‘i
Overlooking the Alaka‘i Plateau from the Alaka‘i Swamp trailhead, Kaua‘i, Hawai‘i.
Overlooking the Alaka‘i Plateau from the Alaka‘i Swamp trailhead, Kaua‘i, Hawai‘i.
Filter Total Items: 53
Getting ahead of the crises: Developing an avian malaria disease management plan for Hawaiian forest birds Getting ahead of the crises: Developing an avian malaria disease management plan for Hawaiian forest birds
Avian malaria is an existential threat to a majority of native Hawaiian forest birds. Climate change is facilitating the spread of malaria to historically disease-free areas, and despite the risk of native Hawaiian forest bird extinctions from malaria outbreaks, no comprehensive disease management plans exist for forest bird conservation areas. Hakalau Forest National Wildlife Refuge...
Authors
Eben H. Paxton, Eldridge Naboa, Nicholas R. Agorastos, Donna L. Ball, Lucas Berio Fortini, Thomas Cady, Richard J. Camp, Patrick J. Hart, Springer Kaye, Steven J. Kendall, Dennis A. LaPointe, Ricardo D. Lopez, Katherine Maria McClure, Amanda K Navine
Population genomics of Aedes albopictus across remote Pacific islands for genetic biocontrol considerations Population genomics of Aedes albopictus across remote Pacific islands for genetic biocontrol considerations
Remote Pacific islands (RPI) are characterized by ecological isolation, diverse endemic species, and vulnerability to invasive organisms due to globalization-driven connectivity. Among these species, Aedes albopictus, a highly invasive vector of flaviviruses, has spread extensively across the RPI via human-mediated dispersal, posing significant health and economic burdens. While the...
Authors
Sangwoo Seok, Adam E. Vorsino, Travis C. Collier, Limb Hapairai, Christopher M. Jacobsen, Jeomhee M. Hasty, Ana L. Romero-Weaver, Eva A. Buckner, Dennis A. LaPointe, Mark Leong, Leo Braack, Christine A. Tabuloc, Joanna C. Chiu, Robyn Raban, Omar S. Akbari, Yoosook Lee
Assessing mosquito populations to limit the spread of avian disease and inform the conservation of Hawaiian forest birds Assessing mosquito populations to limit the spread of avian disease and inform the conservation of Hawaiian forest birds
The introduced mosquito-borne avian malaria, Plasmodium relictum, along with its mosquito vector, Culex quinquefasciatus, are key limiting factors for endemic Hawaiian forest birds and are, in part, responsible for past extinctions and continued population declines of extant species. In the last 10 years steep declines in forest bird populations have been documented on Kaua`i and Maui...
Authors
Dennis A. LaPointe
Environmental and geographical factors influence the occurrence and abundance of the southern house mosquito, Culex quinquefasciatus, in Hawai‘i Environmental and geographical factors influence the occurrence and abundance of the southern house mosquito, Culex quinquefasciatus, in Hawai‘i
Hawaiian honeycreepers, a group of endemic Hawaiian forest birds, are being threatened by avian malaria, a non-native disease that is driving honeycreepers populations to extinction. Avian malaria is caused by the parasite Plasmodium relictum, which is transmitted by the invasive mosquito Culex quinquefasciatus. Environmental and geographical factors play an important role in shaping...
Authors
Oswaldo Villena, Katherine Maria McClure, Richard J. Camp, Dennis A. LaPointe, Carter T. Atkinson, Helen Sofaer, Lucas Berio Fortini
Hawai‘i forest review: Synthesizing the ecology, evolution, and conservation of a model system Hawai‘i forest review: Synthesizing the ecology, evolution, and conservation of a model system
As the most remote archipelago in the world, the Hawaiian Islands are home to a highly endemic and disharmonic biota that has fascinated biologists for centuries. Forests are the dominant terrestrial biome in Hawai‘i, spanning complex, heterogeneous climates across substrates that vary tremendously in age, soil structure, and nutrient availability. Species richness is low in Hawaiian...
Authors
Kasey Barton, Andrea Westerband, Rebecca Ostertag, Elizabeth Stacy, Kawika Winter, Don Drake, Lucas Berio Fortini, Creighton M Litton, Susan Cordell, Paul Krushelnycky, Kapua Kawelo, Kealoha Feliciano, Gordon Bennett, Tiffany Knight
Field trials to test new trap technologies for monitoring Culex populations and the efficacy of the biopesticide formulation VectoMax® FG for control of larval Culex quinquefasciatus in the Alaka'i Plateau, Kaua'i, Hawaii Field trials to test new trap technologies for monitoring Culex populations and the efficacy of the biopesticide formulation VectoMax® FG for control of larval Culex quinquefasciatus in the Alaka'i Plateau, Kaua'i, Hawaii
Mosquito-borne avian malaria Plasmodium relictum is a key limiting factor for endemic Hawaiian forest birds. In the past decade, populations of Kaua‘i’s endemic forest birds have been in a steep decline due to an increase in malaria transmission. To evaluate the use of available biopesticides for short-term mosquito control we tested the efficacy of the biopesticide VectoMax® FG against...
Authors
Dennis A. LaPointe, Theodore V. Black, Michael Riney, Grace Tredinnick, Lisa H. Crampton, Justin Hite