Tania Lewis

Tania Lewis
National Park Service | NPS · Division of Resource Management

8.94
 · 
MS Wildlife Biology

About

15
Publications
2,125
Reads
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38
Citations
Introduction
My current research projects include monitoring glaucous-winged gull nesting colonies in preparation for upcoming native egg harvest, black and brown bear landscape genetics, and collecting baseline abundance and distribution of wildlife in a recently deglaciated landscape. Other research interests include documenting the ecological effects of changing climate, determining animal colonization patterns in relation to landscape changes, and mitigating negative human impacts to wildlife.
Education
September 2008 - May 2012
University of Alaska Fairbanks
Field of study
  • Wildlife Biology

Publications

Publications (15)
Article
Full-text available
Glacier bears are a rare grey color morph of American black bear (Ursus americanus ) found only in northern Southeast Alaska and a small portion of western Canada. We examine contemporary genetic population structure of black bears within the geographic extent of glacier bears and explore how this structure relates to pelage color and landscape fea...
Technical Report
Full-text available
Bears in Glacier Bay National Park and Preserve (GBNPP) are key components in the ecosystem and highly sought for viewing opportunities by visitors. GBNPP is home to both brown (Ursus arctos) and black bear (Ursus americanus) species, including the rare blue-grey color phase of black bear (also known as glacier bears), which are endemic to the park...
Article
The U.S. Department of Interior National Park Service is charged with both monitoring avian communities and evaluating the influence of visitors to National Parks on sensitive species; however, this task is challenging considering that sampling programs often involve multiple species, each with differing behavior, habitat requirements, and detectab...
Article
Full-text available
Glacier Bay National Park, Alaska, is the ancestral homeland of the Huna Tlingit people, for whom Glaucous-winged Gull Larus glaucescens eggs were an important cultural food source until the 1960s, when the National Park Service (NPS) began to enforce regulations prohibiting harvest. Over the past 20 years, NPS has sponsored several studies as well...
Technical Report
Full-text available
Moose (Alces americana) represent an important wildlife resource providing wildlife viewing opportunities within Glacier Bay National park and Preserve and sport hunting opportunities in portions of the preserve and lands surrounding the park. This project was a collaborative effort between state and federal agencies to: 1) quantify the winter (Dec...
Technical Report
Full-text available
Mountain goats (Oreamnos americanus) represent and important wildlife resource providing wildlife viewing opportunities within Glacier Bay National Park and Preserve (GLBA) and sport hunting opportunities in portions of the preserve and lands surrounding the park and preserve. This project was collaborative effort between state and federal agencies...
Article
Full-text available
We examined contemporary genetic structure of brown bears (Ursus arctos) in a recently deglaciated landscape to identify the number and geographical range of populations, the level of admixture, landscape features that limit or promote genetic connectivity, and probable population sources of bears in Glacier Bay following the end of the Little Ice...
Conference Paper
Full-text available
In Glacier Bay National Park, there are 18 islands closed to human use to protect ground-nesting marine birds. From 2012–2014, we conducted repeat ground and vessel-based bird nesting surveys of all closed islands and 7 other areas of concern currently open to the public. Ground surveys were used to document the species present and the distribution...
Article
Full-text available
Brown bears (Ursus arctos) are generally solitary animals, although they are known to aggregate at concentrated food resources. Using remote cameras, we documented brown bears aggregating while scavenging a whale carcass from 19 May to 17 September 2010 in Glacier Bay National Park, Alaska, USA. Such aggregations have not been reported in Glacier B...
Conference Paper
Full-text available
Legislation has recently been introduced in U.S. Congress to allow the traditional harvest of glaucous-winged gull (Larus glaucescens) eggs by Hoonah Tlingit tribal members in Glacier Bay National Park for the first time in over 50 years. A Legislative Environmental Impact Statement completed in 2010 identifies 15 potential harvest sites and mandat...
Thesis
Full-text available
To further knowledge of mammalian colonization patterns following deglaciation, I used occupancy modeling to estimate black and brown bear shoreline distribution of Glacier Bay and how these distributions relates to the number years of land exposure and post glacial plant and stream succession. I also conducted microsatellite genetic analysis of br...
Conference Paper
Full-text available
The physical condition of campsites and potential ecological impacts from human use along Glacier Bay's shoreline was assessed to help inform the upcoming Backcountry Management Plan. We modified a standard campsite impact measurement protocol to fit Glacier Bay's unique geologic and biologic conditions. A total of 257 shoreline campsites in 134 su...
Technical Report
Full-text available
We photographically identified 104 individual humpback whales (Megaptera novaeangliae), including 9 mother/calf pairs, in Glacier Bay and Icy Strait between June 1 and August 31, 1999. This is the highest number of whales documented in the study area since the monitoring program began in 1985 and it contributes to an increasing trend from 1985 to 1...

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