TY - JOUR
T1 - Production of N2O by ammonia oxidizing bacteria at subfreezing temperatures as a model for assessing the N2O anomalies in the vostok ice core
AU - Miteva, Vanya
AU - Sowers, Todd
AU - Brenchley, Jean
N1 - Funding Information:
The authors gratefully acknowledge the assistance and helpful suggestions of Mary Voytek, Luke Geake, Jennifer Biddle, Jennifer Loveland-Curtze and Catherine Teacher. In addition, two anonymous reviewers provided insightful comments that improved the manuscript. This research was supported by NSF Grants OPP 0318145 and MO 0347475.
PY - 2007/7
Y1 - 2007/7
N2 - It was suggested that the abnormally high N2O values found in 130,000-160,000 year-old Vostok ice core samples, characterized by high δ15N and low δ18O values, resulted from in situ microbial N2O production. To substantiate these observations we obtained new geochemical data from the last glacial period and showed the existence of additional small N2O anomalies. To test the hypothesis that microbial metabolism could contribute to these anomalies, we developed protocols for examining the ability of Nitrosomonas cryotolerans cells to produce N2O at subfreezing temperatures. Our results show that these model, frozen cultures produce N2O at temperatures as low as -32°C.
AB - It was suggested that the abnormally high N2O values found in 130,000-160,000 year-old Vostok ice core samples, characterized by high δ15N and low δ18O values, resulted from in situ microbial N2O production. To substantiate these observations we obtained new geochemical data from the last glacial period and showed the existence of additional small N2O anomalies. To test the hypothesis that microbial metabolism could contribute to these anomalies, we developed protocols for examining the ability of Nitrosomonas cryotolerans cells to produce N2O at subfreezing temperatures. Our results show that these model, frozen cultures produce N2O at temperatures as low as -32°C.
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U2 - 10.1080/01490450701437693
DO - 10.1080/01490450701437693
M3 - Article
AN - SCOPUS:34548048815
SN - 0149-0451
VL - 24
SP - 451
EP - 459
JO - Geomicrobiology Journal
JF - Geomicrobiology Journal
IS - 5
ER -