Ammonia-oxidizing archaea have similar power requirements in diverse marine oxic sediments.

ABSTRACT: Energy/power availability is regarded as one of the ultimate controlling factors of microbial abundance in the deep biosphere, where fewer cells are found in habitats of lower energy availability. A critical assumption driving the proportional relationship between total cell abundance and power availability is that the cell-specific power requirement keeps constant or varies over smaller ranges than other variables, which has yet to be validated. Here we present a quantitative framework to determine the cell-specific power requirement of the omnipresent ammonia-oxidizing archaea (AOA) in eight sediment cores with 3-4 orders of magnitude variations of organic matter flux and oxygen penetration depth. Our results show that despite the six orders of magnitude variations in the rates and power

SUBMITTER: Zhao R 

PROVIDER: S-EPMC8630020 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature