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Layne Adams, Ph.D. (Former Employee)

Science and Products

Mother and young caribou on Yukon-Alaska border

Tracking Data for Caribou (Rangifer tarandus granti)

Available here are tracking data of Caribou, an ungulate that ranges between the Alaska Peninsula, up through interior Alaska and the Arctic Coastal Plain, and over to the Yukon Territory. These data were collected from animals living in three different herds including the Fortymile herd, Nelchina herd, and Denali herd.
By
Ecosystems Mission Area, Species Management Research Program, Alaska Science Center
Tracking Data for Caribou (Rangifer tarandus granti)

Tracking Data for Caribou (Rangifer tarandus granti)

Available here are tracking data of Caribou, an ungulate that ranges between the Alaska Peninsula, up through interior Alaska and the Arctic Coastal Plain, and over to the Yukon Territory. These data were collected from animals living in three different herds including the Fortymile herd, Nelchina herd, and Denali herd.
Learn More
Caribou roaming the Arctic Coastal Plain

Terrestrial Mammal Research

Understanding the population dynamics, predator/prey relationships and habitat ecology of terrestrial mammals, such as caribou and muskoxen, is critical for the management of these species and their habitats in Alaska.
By
Ecosystems Mission Area, Species Management Research Program, Alaska Science Center
Terrestrial Mammal Research

Terrestrial Mammal Research

Understanding the population dynamics, predator/prey relationships and habitat ecology of terrestrial mammals, such as caribou and muskoxen, is critical for the management of these species and their habitats in Alaska.
Learn More

GPS Tracking Data for Caribou (Rangifer tarandus granti) from the Denali Herd, Alaska, 2010-2018 GPS Tracking Data for Caribou (Rangifer tarandus granti) from the Denali Herd, Alaska, 2010-2018

GPS collar location data were collected as part of a long-term study on caribou (Rangifer tarandus granti) in the Denali herd of Alaska. Collars were deployed on adult (greater than or equal to 2 years) female caribou from 2010-2013, and then refurbished and redeployed on adult (greater than or equal to 4 years) male caribou from 2014-2018. The collars were manufactured by Telonics (TGW...
By
Alaska Science Center

GPS Tracking Data for the Nelchina Herd Caribou (Rangifer tarandus granti), Alaska, 1999-2002 GPS Tracking Data for the Nelchina Herd Caribou (Rangifer tarandus granti), Alaska, 1999-2002

These data were part of a tracking study of adult female caribou from the Nelchina Herd in Alaska. The dataset is comprised of two comma separated values (.csv) files. Data includes: 1) processed (i.e., erroneous locations removed) GPS locations for caribou, received once per 7 hours (October 1999 to October 2002), and 2) spatial, temporal, and biological attributes of the female caribou...
By
Alaska Science Center

Diet Data from Fecal DNA Metabarcoding and Video Camera Collars from the Porcupine Caribou Herd, Alaska and Yukon Diet Data from Fecal DNA Metabarcoding and Video Camera Collars from the Porcupine Caribou Herd, Alaska and Yukon

These diet data were collected from the Porcupine caribou herd in northern Alaska and Yukon in summer 2021 during 4 periods: calving (occasion 1), post-calving (occasion 2), mosquito harassment (occasion 3), and mid-summer (occasion 4). Diet data was determined by two distinct techniques: DNA metabarcoding data from fecal pellets and video data from camera collars deployed on adult...
By
Alaska Science Center

Serological data on influenza A from birds and mammals on the Arctic Coastal Plain of northern Alaska, 2011-2017 Serological data on influenza A from birds and mammals on the Arctic Coastal Plain of northern Alaska, 2011-2017

These data (in two spreadsheets) are the results of screening for influenza A viruses (IAV) in blood from wild animals that utilize the Arctic region of Alaska. 758 blood samples from nine wildlife species (3 mammal, 6 waterbird) were collected in Arctic Alaska, 2011-2017. Two different tests were used and the results are presented in separate spreadsheets. All blood samples were...
By
Alaska Science Center

Caribou Forage and Soil Data, North Slope of Alaska, 2011-2014 Caribou Forage and Soil Data, North Slope of Alaska, 2011-2014

These data are nutrient concentrations of seven key forage-plant species in the ranges of three caribou herds, in northern Alaska. During the growing seasons of 2011-2014, we collected forage samples from 21 plots within the ranges of three caribou herds: Central Arctic Herd (2011-2013), Teshekpuk (2011-2013), Western Arctic (2013-2014). We also analyzed stable isotopes of carbon (13C)...
By
Alaska Science Center
Filter Total Items: 61

DNA metabarcoding and video camera collars yield different inferences about the summer diet of an arctic ungulate DNA metabarcoding and video camera collars yield different inferences about the summer diet of an arctic ungulate

The diets of wild ungulates are a foundational component of their ecology, influencing their behavior, body condition, and demography. With changing environmental conditions, there is a significant need to identify important forage items for ungulates, but this has often proved challenging. Declines in several barren-ground caribou herds across the North American Arctic have raised...
Authors
Heather E. Johnson, Gabrielle Lys Coulombe, Layne G. Adams, Colleen Arnison, Perry Barboza, Martin Kienzler, William Leacock, Michael J. Suitor
By
Alaska Science Center

Marginalizing time in habitat selection and species distribution models improves inference Marginalizing time in habitat selection and species distribution models improves inference

Aim Recent methodological advances for studying how animals move and use space with telemetry data have focused on fine-scale, more mechanistic inference. However, in many cases, researchers and managers remain interested in larger scale questions regarding species distribution and habitat use across study areas, landscapes, or seasonal ranges. Point processes offer a unified framework...
Authors
Joseph Michael Eisaguirre, Layne G. Adams, Bridget Borg, Heather E. Johnson
By
Alaska Science Center

A serological survey of Francisella tularensis exposure in wildlife on the Arctic Coastal Plain of Alaska A serological survey of Francisella tularensis exposure in wildlife on the Arctic Coastal Plain of Alaska

Tularemia is an infectious zoonotic disease caused by one of several subspecies of Francisella tularensis bacteria. Infections by F. tularensis are common throughout the northern hemisphere and have been detected in more than 250 wildlife species. In Alaska, US, where the pathogen was first identified in 1938, studies have identified F. tularensis antibodies in a diverse suite of taxa...
Authors
Matthew M. Smith, Caroline R. Van Hemert, Todd C. Atwood, David R. Sinnett, Jerry W. Hupp, Brandt W Meixell, David D. Gustine, Layne G. Adams, Andrew M. Ramey
By
Ecosystems Mission Area, Alaska Science Center

Survival and reproduction in Arctic caribou are associated with summer forage and insect harassment Survival and reproduction in Arctic caribou are associated with summer forage and insect harassment

Investigators have speculated that the climate-driven “greening of the Arctic” may benefit barren-ground caribou populations, but paradoxically many populations have declined in recent years. This pattern has raised concerns about the influence of summer habitat conditions on caribou demographic rates, and how populations may be impacted in the future. The short Arctic summer provides...
Authors
Heather E. Johnson, Beth Lenart, Dave Gustine, Layne G. Adams, Perry Barboza
By
Ecosystems Mission Area, Alaska Science Center

Dynamic selection for forage quality and quantity in response to phenology and insects in an Arctic ungulate Dynamic selection for forage quality and quantity in response to phenology and insects in an Arctic ungulate

Spatiotemporal variation in forage is a primary driver of ungulate behavior, yet little is known about the nutritional components they select, and how selection varies across the growing season with changes in forage quality and quantity. We addressed these uncertainties in barren-ground caribou (Rangifer tarandus), which experience their most important foraging opportunities during the...
Authors
Heather E. Johnson, Trevor Golden, Layne G. Adams, David Gustine, Elizabeth A. Lenart, Perry Barboza
By
Ecosystems Mission Area, Alaska Science Center

Novel insights into serodiagnosis and epidemiology of Erysipelothrix rhusiopathiae, a newly recognized pathogen in muskoxen (Ovibos moschatus) Novel insights into serodiagnosis and epidemiology of Erysipelothrix rhusiopathiae, a newly recognized pathogen in muskoxen (Ovibos moschatus)

Muskoxen are a key species of Arctic ecosystems and are important for food security and socio-economic well-being of many Indigenous communities in the Arctic and Subarctic. Between 2009 and 2014, the bacterium Erysipelothrix rhusiopathiae was isolated for the first time in this species in association with multiple mortality events in Canada and Alaska, raising questions regarding the
Authors
F. Mavrot, K. Orsel, W. Hutchins, Layne G. Adams, K. Beckmen, J. Blake, S. Checkley, T. Davison, J. Di Francesco, B. Elkin, L. Leclerc, A. Schneider, M. Tomaselli, S. Kutz
By
Ecosystems Mission Area, Alaska Science Center
The Other 364 Days of the Year: The Real Lives of Wild Reindeer

The Other 364 Days of the Year: The Real Lives of Wild Reindeer

Caribou, North America’s wild reindeer, have lives apart from their famous role on Christmas Eve. To learn more about how  these Arctic antler-bearers...

Read Article
Caribou Appear to Keep up with Warming Arctic

Caribou Appear to Keep up with Warming Arctic

Despite recent changes to the growing season for plants in the Arctic, Alaska, caribou appear to have remained in sync with these changes over the...

Read Article

Science and Products

Mother and young caribou on Yukon-Alaska border

Tracking Data for Caribou (Rangifer tarandus granti)

Available here are tracking data of Caribou, an ungulate that ranges between the Alaska Peninsula, up through interior Alaska and the Arctic Coastal Plain, and over to the Yukon Territory. These data were collected from animals living in three different herds including the Fortymile herd, Nelchina herd, and Denali herd.
By
Ecosystems Mission Area, Species Management Research Program, Alaska Science Center
Tracking Data for Caribou (Rangifer tarandus granti)

Tracking Data for Caribou (Rangifer tarandus granti)

Available here are tracking data of Caribou, an ungulate that ranges between the Alaska Peninsula, up through interior Alaska and the Arctic Coastal Plain, and over to the Yukon Territory. These data were collected from animals living in three different herds including the Fortymile herd, Nelchina herd, and Denali herd.
Learn More
Caribou roaming the Arctic Coastal Plain

Terrestrial Mammal Research

Understanding the population dynamics, predator/prey relationships and habitat ecology of terrestrial mammals, such as caribou and muskoxen, is critical for the management of these species and their habitats in Alaska.
By
Ecosystems Mission Area, Species Management Research Program, Alaska Science Center
Terrestrial Mammal Research

Terrestrial Mammal Research

Understanding the population dynamics, predator/prey relationships and habitat ecology of terrestrial mammals, such as caribou and muskoxen, is critical for the management of these species and their habitats in Alaska.
Learn More

GPS Tracking Data for Caribou (Rangifer tarandus granti) from the Denali Herd, Alaska, 2010-2018 GPS Tracking Data for Caribou (Rangifer tarandus granti) from the Denali Herd, Alaska, 2010-2018

GPS collar location data were collected as part of a long-term study on caribou (Rangifer tarandus granti) in the Denali herd of Alaska. Collars were deployed on adult (greater than or equal to 2 years) female caribou from 2010-2013, and then refurbished and redeployed on adult (greater than or equal to 4 years) male caribou from 2014-2018. The collars were manufactured by Telonics (TGW...
By
Alaska Science Center

GPS Tracking Data for the Nelchina Herd Caribou (Rangifer tarandus granti), Alaska, 1999-2002 GPS Tracking Data for the Nelchina Herd Caribou (Rangifer tarandus granti), Alaska, 1999-2002

These data were part of a tracking study of adult female caribou from the Nelchina Herd in Alaska. The dataset is comprised of two comma separated values (.csv) files. Data includes: 1) processed (i.e., erroneous locations removed) GPS locations for caribou, received once per 7 hours (October 1999 to October 2002), and 2) spatial, temporal, and biological attributes of the female caribou...
By
Alaska Science Center

Diet Data from Fecal DNA Metabarcoding and Video Camera Collars from the Porcupine Caribou Herd, Alaska and Yukon Diet Data from Fecal DNA Metabarcoding and Video Camera Collars from the Porcupine Caribou Herd, Alaska and Yukon

These diet data were collected from the Porcupine caribou herd in northern Alaska and Yukon in summer 2021 during 4 periods: calving (occasion 1), post-calving (occasion 2), mosquito harassment (occasion 3), and mid-summer (occasion 4). Diet data was determined by two distinct techniques: DNA metabarcoding data from fecal pellets and video data from camera collars deployed on adult...
By
Alaska Science Center

Serological data on influenza A from birds and mammals on the Arctic Coastal Plain of northern Alaska, 2011-2017 Serological data on influenza A from birds and mammals on the Arctic Coastal Plain of northern Alaska, 2011-2017

These data (in two spreadsheets) are the results of screening for influenza A viruses (IAV) in blood from wild animals that utilize the Arctic region of Alaska. 758 blood samples from nine wildlife species (3 mammal, 6 waterbird) were collected in Arctic Alaska, 2011-2017. Two different tests were used and the results are presented in separate spreadsheets. All blood samples were...
By
Alaska Science Center

Caribou Forage and Soil Data, North Slope of Alaska, 2011-2014 Caribou Forage and Soil Data, North Slope of Alaska, 2011-2014

These data are nutrient concentrations of seven key forage-plant species in the ranges of three caribou herds, in northern Alaska. During the growing seasons of 2011-2014, we collected forage samples from 21 plots within the ranges of three caribou herds: Central Arctic Herd (2011-2013), Teshekpuk (2011-2013), Western Arctic (2013-2014). We also analyzed stable isotopes of carbon (13C)...
By
Alaska Science Center
Filter Total Items: 61

DNA metabarcoding and video camera collars yield different inferences about the summer diet of an arctic ungulate DNA metabarcoding and video camera collars yield different inferences about the summer diet of an arctic ungulate

The diets of wild ungulates are a foundational component of their ecology, influencing their behavior, body condition, and demography. With changing environmental conditions, there is a significant need to identify important forage items for ungulates, but this has often proved challenging. Declines in several barren-ground caribou herds across the North American Arctic have raised...
Authors
Heather E. Johnson, Gabrielle Lys Coulombe, Layne G. Adams, Colleen Arnison, Perry Barboza, Martin Kienzler, William Leacock, Michael J. Suitor
By
Alaska Science Center

Marginalizing time in habitat selection and species distribution models improves inference Marginalizing time in habitat selection and species distribution models improves inference

Aim Recent methodological advances for studying how animals move and use space with telemetry data have focused on fine-scale, more mechanistic inference. However, in many cases, researchers and managers remain interested in larger scale questions regarding species distribution and habitat use across study areas, landscapes, or seasonal ranges. Point processes offer a unified framework...
Authors
Joseph Michael Eisaguirre, Layne G. Adams, Bridget Borg, Heather E. Johnson
By
Alaska Science Center

A serological survey of Francisella tularensis exposure in wildlife on the Arctic Coastal Plain of Alaska A serological survey of Francisella tularensis exposure in wildlife on the Arctic Coastal Plain of Alaska

Tularemia is an infectious zoonotic disease caused by one of several subspecies of Francisella tularensis bacteria. Infections by F. tularensis are common throughout the northern hemisphere and have been detected in more than 250 wildlife species. In Alaska, US, where the pathogen was first identified in 1938, studies have identified F. tularensis antibodies in a diverse suite of taxa...
Authors
Matthew M. Smith, Caroline R. Van Hemert, Todd C. Atwood, David R. Sinnett, Jerry W. Hupp, Brandt W Meixell, David D. Gustine, Layne G. Adams, Andrew M. Ramey
By
Ecosystems Mission Area, Alaska Science Center

Survival and reproduction in Arctic caribou are associated with summer forage and insect harassment Survival and reproduction in Arctic caribou are associated with summer forage and insect harassment

Investigators have speculated that the climate-driven “greening of the Arctic” may benefit barren-ground caribou populations, but paradoxically many populations have declined in recent years. This pattern has raised concerns about the influence of summer habitat conditions on caribou demographic rates, and how populations may be impacted in the future. The short Arctic summer provides...
Authors
Heather E. Johnson, Beth Lenart, Dave Gustine, Layne G. Adams, Perry Barboza
By
Ecosystems Mission Area, Alaska Science Center

Dynamic selection for forage quality and quantity in response to phenology and insects in an Arctic ungulate Dynamic selection for forage quality and quantity in response to phenology and insects in an Arctic ungulate

Spatiotemporal variation in forage is a primary driver of ungulate behavior, yet little is known about the nutritional components they select, and how selection varies across the growing season with changes in forage quality and quantity. We addressed these uncertainties in barren-ground caribou (Rangifer tarandus), which experience their most important foraging opportunities during the...
Authors
Heather E. Johnson, Trevor Golden, Layne G. Adams, David Gustine, Elizabeth A. Lenart, Perry Barboza
By
Ecosystems Mission Area, Alaska Science Center

Novel insights into serodiagnosis and epidemiology of Erysipelothrix rhusiopathiae, a newly recognized pathogen in muskoxen (Ovibos moschatus) Novel insights into serodiagnosis and epidemiology of Erysipelothrix rhusiopathiae, a newly recognized pathogen in muskoxen (Ovibos moschatus)

Muskoxen are a key species of Arctic ecosystems and are important for food security and socio-economic well-being of many Indigenous communities in the Arctic and Subarctic. Between 2009 and 2014, the bacterium Erysipelothrix rhusiopathiae was isolated for the first time in this species in association with multiple mortality events in Canada and Alaska, raising questions regarding the
Authors
F. Mavrot, K. Orsel, W. Hutchins, Layne G. Adams, K. Beckmen, J. Blake, S. Checkley, T. Davison, J. Di Francesco, B. Elkin, L. Leclerc, A. Schneider, M. Tomaselli, S. Kutz
By
Ecosystems Mission Area, Alaska Science Center
The Other 364 Days of the Year: The Real Lives of Wild Reindeer

The Other 364 Days of the Year: The Real Lives of Wild Reindeer

Caribou, North America’s wild reindeer, have lives apart from their famous role on Christmas Eve. To learn more about how  these Arctic antler-bearers...

Read Article
Caribou Appear to Keep up with Warming Arctic

Caribou Appear to Keep up with Warming Arctic

Despite recent changes to the growing season for plants in the Arctic, Alaska, caribou appear to have remained in sync with these changes over the...

Read Article

*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government

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