Publications by authors named "Geoff Koehler"

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An evaluation of migration fidelity of Ruby-throated Hummingbirds inferred from stable isotope methods.
Geoff Koehler, Kevin J Kardynal, Ron E Jensen, Keith A Hobson

PeerJ· April 2025

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The stable isotope hydrology of Sable Island, Nova Scotia, Canada with implications for evaluating the water budget of wild horses.
Geoff Koehler, Gina McNeill, Keith A Hobson

Isotopes Environ Health Stud· May 2024

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Organic contamination detection for isotopic analysis of water by laser spectroscopy.
Cody Millar, Kim Janzen, Magali F Nehemy, Geoff Koehler, Pedro Hervé-Fernández

Rapid Commun Mass Spectrom· August 2021

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Contribution of nitrogen sources to streams in mixed-use catchments varies seasonally in a cold temperate region.
Kristin J Painter, Robert B Brua, Geoff Koehler, John Spoelstra, Adam G Yates

Sci Total Environ· April 2021

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Fate of bioavailable nutrients released to a stream during episodic effluent releases from a municipal wastewater treatment lagoon.
Kristin J Painter, Robert B Brua, John Spoelstra, Geoff Koehler, Adam G Yates

Environ Sci Process Impacts· December 2020

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Tracking cats revisited: Placing terrestrial mammalian carnivores on δ2H and δ18O isoscapes.
Geoff Koehler, Keith A Hobson

PLoS One· March 2020

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Further experiments comparing direct vapor equilibration and cryogenic vacuum distillation for plant water stable isotope analysis.
Cody Millar, Dyan Pratt, David J Schneider, Geoff Koehler, Jeffrey J McDonnell

Rapid Commun Mass Spectrom· December 2019

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Snow gauge undercatch and its effect on the hydrogen and oxygen stable isotopic composition of precipitation.
Geoff Koehler

Isotopes Environ Health Stud· August 2019

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Geographical assignment of polar bears using multi-element isoscapes.
Geoff Koehler, Kevin J Kardynal, Keith A Hobson

Sci Rep· June 2019

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Spatio-temporal variation of nitrate sources to Lake Winnipeg using N and O isotope (δN, δO) analyses.
David X Soto, Geoff Koehler, Leonard I Wassenaar, Keith A Hobson

Sci Total Environ· January 2019

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Effects of tanning on the stable isotopic compositions of hair.
Geoff Koehler, Keith A Hobson

Forensic Sci Int· November 2018

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Re-evaluation of the hydrogen stable isotopic composition of keratin calibration standards for wildlife and forensic science applications.
David X Soto, Geoff Koehler, Leonard I Wassenaar, Keith A Hobson

Rapid Commun Mass Spectrom· July 2017

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Combining Denitrifying Bacteria and Laser Spectroscopy for Isotopic Analyses (δ(15)N, δ(18)O) of Dissolved Nitrate.
David X Soto, Geoff Koehler, Keith A Hobson

Anal Chem· July 2015

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On the use of stable oxygen isotope (δ (18)O) measurements for tracking avian movements in North America.
Keith A Hobson, Geoff Koehler

Ecol Evol· February 2015

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Measurement of stable isotope activities in saline aqueous solutions using optical spectroscopy methods.
Geoff Koehler, Leonard I Wassenaar, Jim Hendry

Isotopes Environ Health Stud· June 2014

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Determination of the hydrogen isotopic compositions of organic materials and hydrous minerals using thermal combustion laser spectroscopy.
Geoff Koehler, Leonard I Wassenaar

Anal Chem· April 2012

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Realtime stable isotope monitoring of natural waters by parallel-flow laser spectroscopy.
Geoff Koehler, Leonard I Wassenaar

Anal Chem· February 2011

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On-line technique for the determination of the delta37Cl of inorganic and total organic Cl in environmental samples.
Leonard I Wassenaar, Geoff Koehler

Anal Chem· November 2004

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