Ubiquity and Dominance of Comammox Over AOB and AOA and their Links To ARGs in Antarctic Lake Sediments.

ABSTRACT: Complete ammonia oxidizers (comammox), oxidizing ammonia to nitrate directly, have been found to exist widely in multiple environments, but their distribution patterns are still under-explored in Antarctic environments. For the first time, the sediments were collected from West Antarctic lakes to investigate distribution patterns and community structure for comammox, ammonia oxidizing archaea (AOA) and bacteria (AOB), and nitrite-oxidizing bacteria (NOB), as well as the associations between ammonia oxidizers and antibiotic resistance genes (ARGs). Comammox clade B and AOB were dominant ammonia oxidizers, with the abundances of (1.62 ± 0.10) × 10² - (5.21 ± 0.74) × 10⁶ and (0.17 ± 0.05) × 10⁵ - (4.79 ± 0.65) × 10⁵ copies g^- 1 sediment,

SUBMITTER: Guo M 

PROVIDER: S-EPMC12774962 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature