TY - JOUR
T1 - Abundance and functional importance of complete ammonia-oxidizing bacteria (comammox) versus canonical nitrifiers in temperate forest soils
AU - Osburn, Ernest D.
AU - Barrett, J. E.
N1 - Publisher Copyright:
© 2020
PY - 2020/6
Y1 - 2020/6
N2 - Forest disturbance increases soil nitrification rates in temperate ecosystems, but little is understood regarding contributions of newly discovered complete ammonia-oxidizing bacteria (i.e., comammox) to this important ecosystem process. We sampled soils across eight historically disturbed and adjacent reference forested watersheds at the Coweeta Hydrologic Laboratory in North Carolina and used qPCR to determine abundance of three groups of nitrifiers: canonical ammonia-oxidizing bacteria (AOB), ammonia-oxidizing archaea (AOA), and comammox bacteria (CAOB). All three groups exhibited significantly higher abundance in disturbed soils, though CAOB were more abundant than either AOA or AOB. Further, CAOB showed similar correlations with soil variables compared with AOB, suggesting similar niche requirements. CAOB were better predictors of soil NO3 − relative to AOA and AOB, suggesting CAOB are functionally relevant to nitrification in temperate forests.
AB - Forest disturbance increases soil nitrification rates in temperate ecosystems, but little is understood regarding contributions of newly discovered complete ammonia-oxidizing bacteria (i.e., comammox) to this important ecosystem process. We sampled soils across eight historically disturbed and adjacent reference forested watersheds at the Coweeta Hydrologic Laboratory in North Carolina and used qPCR to determine abundance of three groups of nitrifiers: canonical ammonia-oxidizing bacteria (AOB), ammonia-oxidizing archaea (AOA), and comammox bacteria (CAOB). All three groups exhibited significantly higher abundance in disturbed soils, though CAOB were more abundant than either AOA or AOB. Further, CAOB showed similar correlations with soil variables compared with AOB, suggesting similar niche requirements. CAOB were better predictors of soil NO3 − relative to AOA and AOB, suggesting CAOB are functionally relevant to nitrification in temperate forests.
KW - AOA
KW - AOB
KW - Comammox
KW - Disturbance
KW - Forest
KW - Nitrification
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U2 - 10.1016/j.soilbio.2020.107801
DO - 10.1016/j.soilbio.2020.107801
M3 - Article
AN - SCOPUS:85082736361
SN - 0038-0717
VL - 145
JO - Soil Biology and Biochemistry
JF - Soil Biology and Biochemistry
M1 - 107801
ER -