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Linking Hydrogen (δ2H) Isotopes in Feathers and Precipitation: sources of Variance and Consequences for Assignment to Isoscapes
Department of Zoology, Lund University, Lund, Scania, Sweden.ORCID iD: 0000-0001-7089-524X
2012 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 7, no 4, e35137Article in journal (Refereed) Published
Abstract [en]

Tracking small migrant organisms worldwide has been hampered by technological and recovery limitations and sampling bias inherent in exogenous markers. Naturally occurring stable isotopes of H (δ2H) in feathers provide an alternative intrinsic marker of animal origin due to the predictable spatial linkage to underlying hydrologically driven flow of H isotopes into foodwebs. This approach can assess the likelihood that a migrant animal originated from a given location(s) within a continent but requires a robust algorithm linking H isotopes in tissues of interest to an appropriate hydrological isotopic spatio-temporal pattern, such as weighted-annual rainfall. However, a number of factors contribute to or alter expected isotopic patterns in animals. We present results of an extensive investigation into taxonomic and environmental factors influencing feather δ2H patterns across North America. Stable isotope data were measured from 544 feathers from 40 species and 140 known locations. For δ2H, the most parsimonious model explaining 83% of the isotopic variance was found with amount-weighted growing-season precipitation δ2H, foraging substrate and migratory strategy. This extensive H isotopic analysis of known-origin feathers of songbirds in North America and elsewhere reconfirmed the strong coupling between tissue δ2H and global hydrologic δ2H patterns, and accounting for variance associated with foraging substrate and migratory strategy, can be used in conservation and research for the purpose of assigning birds and other species to their approximate origin.

Place, publisher, year, edition, pages
2012. Vol. 7, no 4, e35137
Keyword [en]
hydrogen isotopes, mexico, migratory connectivity, molt, moult, north america
National Category
Ecology Oceanography, Hydrology, Water Resources
Identifiers
URN: urn:nbn:se:umu:diva-130366DOI: 10.1371/journal.pone.0035137ISI: 000305336600086PubMedID: 22509393OAI: oai:DiVA.org:umu-130366DiVA: diva2:1066554
Conference
2012/04/13/07:21:58
Available from: 2017-01-18 Created: 2017-01-18 Last updated: 2017-02-13Bibliographically approved

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Larson, Keith W.
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CiteExportLink to record
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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
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