This dataset consists of hydrogen and oxygen isotope values of human hair, insect chitin and bird feathers with location and sample information.
data("knownOrig")
SpatialPointsDataFrame with 8 variables.
d2H: Hydrogen isotope ratio (permil, VSMOW)
d18O: Oxygen isotope ratio (permil, VSMOW)
Taxon: Genus and species name
Group: Taxonomic group (informal)
Source_quality:Code indicating level of certainty in geographic origin
Age_code: Code for age of individual
Reference: Bibliographic citation of source
ID: Unique ID
Bowen, G. J. et al. (2009) Dietary and physiological controls on the hydrogen and oxygen isotope ratios of hair from mid-20th century indigenous populations. American Journal of Physical Anthropology, 139, 494--504.
Clark, R. G., Hobson, K. A. and Wassenaar, L. I. (2006) Geographic variation in the isotopic (dD, d13C, d15N, d34S) composition of feathers and claws from lesser scaup and northern pintail: implications for studies of migratory connectivity. Canadian Journal of Zoology 84 1395--1401.
Ehleringer, J. R. et al. (2008) Hydrogen and oxygen isotope ratios in human hair are related to geography. Proceedings of the National Academy of Sciences 105 2788--2793.
Hobson, K. A., Bowen, G. J., Wassenaar, L. I., Ferrand, Y. and Lormee, H. (2004) Using stable hydrogen and oxygen isotope measurements of feathers to infer geographical origins of migrating European birds. Oecologia 141 477--488.
Hobson, K. A. and Koehler, G. (2015) On the use of stable oxygen isotope (d18O) measurements for tracking avian movements in North America. Ecology and Evolution 5 799--806.
Hobson, K. A., Van Wilgenburg, S. L., Wassenaar, L. I. and Larson, K. (2012) Linking hydrogen (d2H) isotopes in feathers and precipitation: sources of variance and consequences for assignment to isoscapes. PLoS ONE 7 e35137.
Hobson, K. A. and Wassenaar, L. I. (1997) Linking breeding and wintering grounds of neotropical migrant songbirds using stable hydrogen isotopic analysis of feathers. Oecologia 109 142--148.
Hobson, K. A., Wassenaar, L. I. and Taylor, O. R. (1999) Stable isotopes (dD and d13C) are geographic indicators of natal origins of monarch butterflies in eastern North America. Oecologia 120 397--404.
Lott, C. A. and Smith, J. P. (2006) A geographic-information-system approach to estimating the origin of migratory raptors in North America using stable hydrogen isotope ratios in feathers. The Auk 123 822--835.
Thompson, A. H. et al. (2010) Stable isotope analysis of modern human hair collected from Asia (China, India, Mongolia and Pakistan). American Journal of Physical Anthropology 141 440--451.
Wunder, M.B., 2007. Geographic structure and dynamics in Mountain Plover. Doctoral dissertation, Colorado State University.
# NOT RUN {
data("knownOrig")
class(knownOrig)
summary(knownOrig@data)
# }
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