Intrinsic Markers In Avian Populations: Explorations In Stable Isotopes, Contaminants, And Genetics
Dissertation (Ph.D.) University of Alaska Fairbanks, 2003 This research outlines the diversity of questions that intrinsic markers have the potential to answer and demonstrates some of these marker's limitations and successes. To test the working hypothesis that feathers grown on different cont...
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ftunivalaska:oai:scholarworks.alaska.edu:11122/8664 2023-05-15T14:18:09+02:00 Intrinsic Markers In Avian Populations: Explorations In Stable Isotopes, Contaminants, And Genetics Rocque, Deborah Anne Winker, Kevin Duffy, Lawrence K. Ben-David, Merav Barry, Ronald P. 2003 http://hdl.handle.net/11122/8664 unknown http://hdl.handle.net/11122/8664 Department of Biology and Wildlife Ecology Environmental science Dissertation phd 2003 ftunivalaska 2023-02-23T21:37:06Z Dissertation (Ph.D.) University of Alaska Fairbanks, 2003 This research outlines the diversity of questions that intrinsic markers have the potential to answer and demonstrates some of these marker's limitations and successes. To test the working hypothesis that feathers grown on different continents have significantly different stable isotope ratios in commonly used markers, I analyzed stable isotopes in two generations of feathers from three species of birds that breed at high latitudes and winter on different continents. As expected, significant differences in stable isotope ratios were detected between summer- and winter-grown feathers in both plover species (Pluvialis fulva and P. domininca). However, no differences were found between the two groups of winter-grown plover feathers, despite being grown on different continents. Similarly, no differences were detected in isotope values between summer- and winter-grown feathers in northern wheatears (Oenanthe oenanthe). Large variances in isotope ratios limited the percentage of feathers correctly assigned to their origins to 41%. Atmospheric transport has been identified as the source of pollutants in several arctic ecosystems and has the potential to severely impact high-latitude populations. To determine whether long-range atmospheric transport, point sources, or migratory prey were sources of contaminants in the North Pacific, birds from two trophic levels were sampled across the longitudinal transect of the Aleutian Archipelago. Carbon isotope ratios differed among islands, thereby linking birds to island food webs and ruling out contaminant transfer through migratory prey. Patterns in some PCB congeners indicated local point sources, but significant west-to-east declines in contaminant concentrations for the majority of detected organochlorines provided evidence of long-range transport. Linking individuals to source populations using intrinsic markers has only been successful at broad scales. To determine whether increased resolution among populations ... Doctoral or Postdoctoral Thesis Archipelago Arctic Alaska University of Alaska: ScholarWorks@UA Arctic Fairbanks Pacific |
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University of Alaska: ScholarWorks@UA |
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Ecology Environmental science |
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Ecology Environmental science Rocque, Deborah Anne Intrinsic Markers In Avian Populations: Explorations In Stable Isotopes, Contaminants, And Genetics |
topic_facet |
Ecology Environmental science |
description |
Dissertation (Ph.D.) University of Alaska Fairbanks, 2003 This research outlines the diversity of questions that intrinsic markers have the potential to answer and demonstrates some of these marker's limitations and successes. To test the working hypothesis that feathers grown on different continents have significantly different stable isotope ratios in commonly used markers, I analyzed stable isotopes in two generations of feathers from three species of birds that breed at high latitudes and winter on different continents. As expected, significant differences in stable isotope ratios were detected between summer- and winter-grown feathers in both plover species (Pluvialis fulva and P. domininca). However, no differences were found between the two groups of winter-grown plover feathers, despite being grown on different continents. Similarly, no differences were detected in isotope values between summer- and winter-grown feathers in northern wheatears (Oenanthe oenanthe). Large variances in isotope ratios limited the percentage of feathers correctly assigned to their origins to 41%. Atmospheric transport has been identified as the source of pollutants in several arctic ecosystems and has the potential to severely impact high-latitude populations. To determine whether long-range atmospheric transport, point sources, or migratory prey were sources of contaminants in the North Pacific, birds from two trophic levels were sampled across the longitudinal transect of the Aleutian Archipelago. Carbon isotope ratios differed among islands, thereby linking birds to island food webs and ruling out contaminant transfer through migratory prey. Patterns in some PCB congeners indicated local point sources, but significant west-to-east declines in contaminant concentrations for the majority of detected organochlorines provided evidence of long-range transport. Linking individuals to source populations using intrinsic markers has only been successful at broad scales. To determine whether increased resolution among populations ... |
author2 |
Winker, Kevin Duffy, Lawrence K. Ben-David, Merav Barry, Ronald P. |
format |
Doctoral or Postdoctoral Thesis |
author |
Rocque, Deborah Anne |
author_facet |
Rocque, Deborah Anne |
author_sort |
Rocque, Deborah Anne |
title |
Intrinsic Markers In Avian Populations: Explorations In Stable Isotopes, Contaminants, And Genetics |
title_short |
Intrinsic Markers In Avian Populations: Explorations In Stable Isotopes, Contaminants, And Genetics |
title_full |
Intrinsic Markers In Avian Populations: Explorations In Stable Isotopes, Contaminants, And Genetics |
title_fullStr |
Intrinsic Markers In Avian Populations: Explorations In Stable Isotopes, Contaminants, And Genetics |
title_full_unstemmed |
Intrinsic Markers In Avian Populations: Explorations In Stable Isotopes, Contaminants, And Genetics |
title_sort |
intrinsic markers in avian populations: explorations in stable isotopes, contaminants, and genetics |
publishDate |
2003 |
url |
http://hdl.handle.net/11122/8664 |
geographic |
Arctic Fairbanks Pacific |
geographic_facet |
Arctic Fairbanks Pacific |
genre |
Archipelago Arctic Alaska |
genre_facet |
Archipelago Arctic Alaska |
op_relation |
http://hdl.handle.net/11122/8664 Department of Biology and Wildlife |
_version_ |
1766289863929233408 |