Lichen communities and caribou habitat in Denali National Park and Preserve, Alaska, USA

Lichens play many important roles in subarctic terrestrial ecosystems by fixing nitrogen, colonizing rock and gravel, stabilizing otherwise bare soil, adding significantly to vegetation biodiversity and serving as the primary food for caribou in the winter. In these chapters, I analyzed lichen commu...

Full description

Bibliographic Details
Main Author: Nelson, Peter R.
Other Authors: McCune, Bruce, Taylor, Barbara, McComb, Brenda, Cohen, Warren, Pyke, Dave, Botany and Plant Pathology, Oregon State University. Graduate School
Format: Doctoral or Postdoctoral Thesis
Language:English
unknown
Published: Oregon State University
Subjects:
Caribou > Food > Alaska > Denali National Park and Preserve
Lichens > Effect of fires on > Alaska > Denali National Park and Preserve
Lichen communities > Alaska > Denali National Park and Preserve
Lichens > Remote sensing > Alaska > Denali National Park and Preserve
Caribou > Habitat > Alaska > Denali National Park and Preserve
Lichens > Climatic factors > Alaska > Denali National Park and Preserve
Lichens > Ecophysiology > Alaska > Denali National Park and Preserve
Subarctic
Alaska
Online Access:https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/7s75dg562
id ftoregonstate:ir.library.oregonstate.edu:7s75dg562
record_format openpolar
spelling ftoregonstate:ir.library.oregonstate.edu:7s75dg562 2024-04-21T08:12:30+00:00 Lichen communities and caribou habitat in Denali National Park and Preserve, Alaska, USA Nelson, Peter R. McCune, Bruce Taylor, Barbara McComb, Brenda Cohen, Warren Pyke, Dave Botany and Plant Pathology Oregon State University. Graduate School https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/7s75dg562 English [eng] eng unknown Oregon State University https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/7s75dg562 All rights reserved Caribou -- Food -- Alaska -- Denali National Park and Preserve Lichens -- Effect of fires on -- Alaska -- Denali National Park and Preserve Lichen communities -- Alaska -- Denali National Park and Preserve Lichens -- Remote sensing -- Alaska -- Denali National Park and Preserve Caribou -- Habitat -- Alaska -- Denali National Park and Preserve Lichens -- Climatic factors -- Alaska -- Denali National Park and Preserve Lichens -- Ecophysiology -- Alaska -- Denali National Park and Preserve Dissertation ftoregonstate 2024-03-28T01:40:26Z Lichens play many important roles in subarctic terrestrial ecosystems by fixing nitrogen, colonizing rock and gravel, stabilizing otherwise bare soil, adding significantly to vegetation biodiversity and serving as the primary food for caribou in the winter. In these chapters, I analyzed lichen community and ecological trait structure along environmental gradients, map lichens using some of their unique spectral properties to generate lichen maps and study caribou habitat selection patterns in relation to lichens and other habitat variables. Morphological and life history traits of lichens influence their ecological roles through physiological limitations imposed by their form and photobionts, the algal or cyanobacterial partner. In chapter 2, I analyzed the lichen traits in relationship to environmental gradients, other forms of vegetation and time since fire in Denali National Park and Preserve, Alaska. Lichens with different photobionts reached different maxima along environmental gradients, these corresponding to variable water availability or specific biotic factors thought to favor that photobiont. Green algal lichens were most abundant in the alpine whereas cyanolichens peaked where shrub cover increased. Tripartite lichens were most abundant in middle elevation, mossy areas. Lichen growthforms peaked along desiccation and water absorption gradients. Lichens with small vegetative propagules were most abundant in lowland forests. Recent fire favored simple, Cladonia-form lichens with soredia that grow on wood whereas erect branched fruticose lichens, the "reindeer lichens", had only partially recovered 20-100 years after fire. These results imply interacting forces of water regulation, dispersal and optimum conditions for photosynthesis drive lichen trait frequency and abundance. The fungal partner within the lichen symbiosis produces many unique compounds that are often brightly colored. Other studies have attempted to map lichens using their distinctive spectral properties but no study has yet to target ... Doctoral or Postdoctoral Thesis Subarctic Alaska ScholarsArchive@OSU (Oregon State University)
institution Open Polar
collection ScholarsArchive@OSU (Oregon State University)
op_collection_id ftoregonstate
language English
unknown
topic Caribou -- Food -- Alaska -- Denali National Park and Preserve
Lichens -- Effect of fires on -- Alaska -- Denali National Park and Preserve
Lichen communities -- Alaska -- Denali National Park and Preserve
Lichens -- Remote sensing -- Alaska -- Denali National Park and Preserve
Caribou -- Habitat -- Alaska -- Denali National Park and Preserve
Lichens -- Climatic factors -- Alaska -- Denali National Park and Preserve
Lichens -- Ecophysiology -- Alaska -- Denali National Park and Preserve
spellingShingle Caribou -- Food -- Alaska -- Denali National Park and Preserve
Lichens -- Effect of fires on -- Alaska -- Denali National Park and Preserve
Lichen communities -- Alaska -- Denali National Park and Preserve
Lichens -- Remote sensing -- Alaska -- Denali National Park and Preserve
Caribou -- Habitat -- Alaska -- Denali National Park and Preserve
Lichens -- Climatic factors -- Alaska -- Denali National Park and Preserve
Lichens -- Ecophysiology -- Alaska -- Denali National Park and Preserve
Nelson, Peter R.
Lichen communities and caribou habitat in Denali National Park and Preserve, Alaska, USA
topic_facet Caribou -- Food -- Alaska -- Denali National Park and Preserve
Lichens -- Effect of fires on -- Alaska -- Denali National Park and Preserve
Lichen communities -- Alaska -- Denali National Park and Preserve
Lichens -- Remote sensing -- Alaska -- Denali National Park and Preserve
Caribou -- Habitat -- Alaska -- Denali National Park and Preserve
Lichens -- Climatic factors -- Alaska -- Denali National Park and Preserve
Lichens -- Ecophysiology -- Alaska -- Denali National Park and Preserve
description Lichens play many important roles in subarctic terrestrial ecosystems by fixing nitrogen, colonizing rock and gravel, stabilizing otherwise bare soil, adding significantly to vegetation biodiversity and serving as the primary food for caribou in the winter. In these chapters, I analyzed lichen community and ecological trait structure along environmental gradients, map lichens using some of their unique spectral properties to generate lichen maps and study caribou habitat selection patterns in relation to lichens and other habitat variables. Morphological and life history traits of lichens influence their ecological roles through physiological limitations imposed by their form and photobionts, the algal or cyanobacterial partner. In chapter 2, I analyzed the lichen traits in relationship to environmental gradients, other forms of vegetation and time since fire in Denali National Park and Preserve, Alaska. Lichens with different photobionts reached different maxima along environmental gradients, these corresponding to variable water availability or specific biotic factors thought to favor that photobiont. Green algal lichens were most abundant in the alpine whereas cyanolichens peaked where shrub cover increased. Tripartite lichens were most abundant in middle elevation, mossy areas. Lichen growthforms peaked along desiccation and water absorption gradients. Lichens with small vegetative propagules were most abundant in lowland forests. Recent fire favored simple, Cladonia-form lichens with soredia that grow on wood whereas erect branched fruticose lichens, the "reindeer lichens", had only partially recovered 20-100 years after fire. These results imply interacting forces of water regulation, dispersal and optimum conditions for photosynthesis drive lichen trait frequency and abundance. The fungal partner within the lichen symbiosis produces many unique compounds that are often brightly colored. Other studies have attempted to map lichens using their distinctive spectral properties but no study has yet to target ...
author2 McCune, Bruce
Taylor, Barbara
McComb, Brenda
Cohen, Warren
Pyke, Dave
Botany and Plant Pathology
Oregon State University. Graduate School
format Doctoral or Postdoctoral Thesis
author Nelson, Peter R.
author_facet Nelson, Peter R.
author_sort Nelson, Peter R.
title Lichen communities and caribou habitat in Denali National Park and Preserve, Alaska, USA
title_short Lichen communities and caribou habitat in Denali National Park and Preserve, Alaska, USA
title_full Lichen communities and caribou habitat in Denali National Park and Preserve, Alaska, USA
title_fullStr Lichen communities and caribou habitat in Denali National Park and Preserve, Alaska, USA
title_full_unstemmed Lichen communities and caribou habitat in Denali National Park and Preserve, Alaska, USA
title_sort lichen communities and caribou habitat in denali national park and preserve, alaska, usa
publisher Oregon State University
url https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/7s75dg562
genre Subarctic
Alaska
genre_facet Subarctic
Alaska
op_relation https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/7s75dg562
op_rights All rights reserved
_version_ 1796932587207262208

Similar Items