Andrew P. Baltensperger

Andrew P. Baltensperger
University of Alaska Fairbanks · International Arctic Research Center

PhD
Mapping terrestrial biodiversity patterns across Alaska

About

31
Publications
6,098
Reads
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257
Citations
Citations since 2017
13 Research Items
227 Citations
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Introduction
I am a Research Associate with the International Arctic Research Center at the University of Alaska Fairbanks. I conduct research in terrestrial ecology, ecological niche modeling, biodiversity patterns, machine learning, landscape change, and wildlife conservation. Currently I am reviewing changing range extents of 63 terrestrial Alaskan mammals, studying the distribution and natural history of Northern bog lemmings, and examining shifting availability and use of subsistence resources in Alaska
Additional affiliations
October 2018 - September 2019
University of South Dakota
Position
  • PostDoc Position
April 2015 - October 2018
Gates of the Arctic/Yukon-Charley Rivers National Parks
Position
  • GIS Specialist
March 2009 - May 2015
University of Alaska Fairbanks
Position
  • PhD Student

Publications

Publications (31)
Article
Full-text available
Changing climate conditions are causing global distribution shifts, resulting in altered food webs and novel species assemblages in terrestrial systems. How diets of sympatric small mammals overlap and whether this may translate into competitive exclusion among new species interactions remains largely unknown. Monitoring niche overlap in changing a...
Chapter
Full-text available
Central America is home to some of the world’s most diverse landscapes including at least 20 life zones, 22 ecoregions, and five major tropical forest types (Holdridge et al. 1971). As a constricted, natural corridor between North and South America, Central America hosts a variety of mammalian species from both continents, and is also home to sever...
Article
Full-text available
Background: Caribou in the Western Arctic Herd undertake one of the longest, remaining intact migrations of terrestrial mammals in the world. They are also the most important subsistence resource for many northern rural residents, who rely on the caribou's migratory movements to bring them near for harvest. Migratory geography has never been stati...
Article
Full-text available
ContextOver the past decades, numerous threats from climate- and land-use change to ecosystems have been identified. Grassland ecosystems are among the most endangered in the world and ongoing grassland declines in the Great Plains have been a major concern for avian biodiversity conservation.Objectives Threat mitigation may include biofuel cultiva...
Article
Full-text available
ABSTRACT: The northern bog lemming Synaptomys borealis (NBL) is a rare small mammal that is undergoing a federal Species Status Assessment (SSA) under the US Endangered Species Act. Despite a wide North American distribution, very little is known about NBL dietary or habitat needs, both of which are germane to the resiliency of this species to clim...
Chapter
Machine learning (ML) has been established and used in science-based applications since the 1970s. The advent and maturation of mathematical algorithms and concepts like Neural Networks, Entropy, Classification and Regression Trees (CARTs), as well as the enhancement of computational power on personal computers worldwide have allowed for the develo...
Chapter
Full-text available
Climate change is acting to reallocate biomes and shift the distribution of species in Alaska, where many animals exist near their thermodynamic limits. Machine-learning based ecological niche models that account for landscape characteristics and changes in climate have been effective tools for deciphering patterns in messy, presence-only datasets,...
Presentation
Full-text available
This work models changes in the spatial distribution of bog lemmings over the past century and into the future. It also includes an assessment of landcover use using 3 different landcover datasets.
Article
Full-text available
In Table 3, the values in the fifth column are incorrect. Please see the corrected Table 3 here. This error has also caused the following errors in the text: There are errors in the first paragraph under the subheading “Model Change between 2010 and 2100” in the Results section. The correct paragraph is: Comparisons between current and future speci...
Chapter
Climate change is acting to reallocate biomes and shift the distribution of species in Alaska, where many animals exist near their thermodynamic limits. Machine-learning based ecological niche models that account for landscape characteristics and changes in climate have been effective tools for deciphering patterns in messy, presence-only datasets,...
Chapter
Machine learning (ML) has been established and used in science-based applications since the 1970s. The advent and maturation of mathematical algorithms and concepts like Neural Networks, Entropy, Classification and Regression Trees (CARTs), as well as the enhancement of computational power on personal computers worldwide have allowed for the develo...
Article
Full-text available
Rapidly changing environmental conditions are influencing distributions of wildlife species in Alaska. Due to strict physiological requirements, the distribution of American martens (Martes americana) is theorized to be driven by changing habitat, climate, and other anthropogenic conditions. We aimed to quantify marten distributions on the Kenai Pe...
Article
Full-text available
Recent climate change in the Arctic is driving permafrost thaw, which has important implications for regional hydrology and global carbon dynamics. Permafrost is an important control on groundwater dynamics and the amount and chemical composition of dissolved organic matter (DOM) transported by high-latitude rivers. The consequences of permafrost t...
Article
Full-text available
The Alaska Hare (Lepus othus Merriam 1900) is the largest lagomorph in North America but remains one of the most poorly studied terrestrial mammals on the continent. Its current distribution is restricted to western Alaska south of the Brooks Range, but historical accounts from north of the Brooks Range (the North Slope) have led to confusion over...
Chapter
Full-text available
Climate change is negatively affecting tropical regions through increasing temperatures and decreased precipitation leading to changes in local hydrology and decreasing water supply among others. In order to make accurate future predictions of carbon stock and forest health it is necessary to better understand the current underlying baseline carbon...
Article
Full-text available
Climate change is acting to reallocate biomes, shift the distribution of species, and alter community assemblages in Alaska. Predictions regarding how these changes will affect the biodiversity and interspecific relationships of small mammals are necessary to pro-actively inform conservation planning. We used a set of online occurrence records and...
Article
Full-text available
Context Changing global environmental conditions, especially at northern latitudes, are threatening to shift species distributions and alter wildlife communities. Objective We aimed to establish current distributions and community arrangements of small mammals to provide important baselines for monitoring and conserving biodiversity into the future...
Article
Full-text available
The common raven (Corvus corax) is an abundant generalist of the northern hemisphere, known to congregate and roost near human-related food sources. Due to a growing human-footprint and associated anthropogenic food subsidies, raven populations have increased dramatically over the past several years throughout the USA. The sub-arctic region has als...
Conference Paper
Full-text available
Predictive modeling of the future, or of the past, has recently become very popular for climate-change and human-impact studies. However, for many people, it is less clear exactly how to interpret such mathematical models, which carry little direct accuracy in space and time. At least seven components are relevant for valid model interpretation and...
Article
Full-text available
To determine the habitat preferences of Myotis spp. we used bat detectors and tape recorders to measure the level of bat activity in four habitats in the northern lower peninsula of Michigan: riverine, lakeside, forested, and disturbed. Acitivity was measured by the number of passes by Myotis spp. per night over a two-week period in July and August...
Article
Full-text available
Social dominance at prime foraging sites in eastern chipmunks (Tamias striatus) is believed to be related to the need to conserve valuable energy as suggested by the Central Place Foraging Theory. In order to determine the factors which influence dominance, we investigated the effects of sex, weight and the distance from feeding stations to burrows...
Article
Full-text available
Members of the genus Drosera (sundews) are notorious for their ability to capture insects in order to supplement low levels of nutrients in the habitats in which they live. Two species, Drosera linearis and Drosera rotundifolia use the same mechanisms to capture prey, but are distinctly different in the shapes of their leaves and their preferred ha...

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Projects

Projects (3)
Archived project
Map changes in the distribution of an understudied small mammal (Synaptomys borealis). Assess its preferred habitat associations and dietary niche space.