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Simultaneous sulfate and nitrate reduction in coastal sediments.
Publication Type: Academic Journal
Source(s): ISME communications [ISME Commun] 2023 Mar 08; Vol. 3 (1), pp. 17. Date of Electronic Publication: 2023 Mar 08.
Abstract: The oscillating redox conditions that characterize coastal sandy sediments foster microbial communities capable of respiring oxygen and nitrate simultaneously, thereby increasing the potential for organic matter remineralization, nitrogen (N)-loss and ...
Terrestrial-type nitrogen-fixing symbiosis between seagrass and a marine bacterium.
Publication Type: Academic Journal
Source(s): Nature [Nature] 2021 Dec; Vol. 600 (7887), pp. 105-109. Date of Electronic Publication: 2021 Nov 03.
Abstract: Symbiotic N 2 -fixing microorganisms have a crucial role in the assimilation of nitrogen by eukaryotes in nitrogen-limited environments 1-3 . Particularly among land plants, N 2 -fixing symbionts occur in a variety of distantly related plant lineages a...
Purple sulfur bacteria fix N 2 via molybdenum-nitrogenase in a low molybdenum Proterozoic ocean analogue.
Publication Type: Academic Journal
Source(s): Nature communications [Nat Commun] 2021 Aug 06; Vol. 12 (1), pp. 4774. Date of Electronic Publication: 2021 Aug 06.
Abstract: Biological N 2 fixation was key to the expansion of life on early Earth. The N 2 -fixing microorganisms and the nitrogenase type used in the Proterozoic are unknown, although it has been proposed that the canonical molybdenum-nitrogenase was not used d...
Advection Drives Nitrate Past the Microphytobenthos in Intertidal Sands, Fueling Deeper Denitrification.
Publication Type: Academic Journal
Source(s): Frontiers in microbiology [Front Microbiol] 2021 Jun 17; Vol. 12, pp. 556268. Date of Electronic Publication: 2021 Jun 17 (Print Publication: 2021).
Abstract: Nitrification rates are low in permeable intertidal sand flats such that the water column is the primary source of nitrate to the sediment. During tidal inundation, nitrate is supplied to the pore space by advection rather than diffusion, relieving the...
Small sinking particles control anammox rates in the Peruvian oxygen minimum zone.
Publication Type: Academic Journal
Source(s): Nature communications [Nat Commun] 2021 May 28; Vol. 12 (1), pp. 3235. Date of Electronic Publication: 2021 May 28.
Abstract: Anaerobic oxidation of ammonium (anammox) in oxygen minimum zones (OMZs) is a major pathway of oceanic nitrogen loss. Ammonium released from sinking particles has been suggested to fuel this process. During cruises to the Peruvian OMZ in April-June 201...
Nitrate respiration and diel migration patterns of diatoms are linked in sediments underneath a microbial mat.
Publication Type: Academic Journal
Source(s): Environmental microbiology [Environ Microbiol] 2021 Mar; Vol. 23 (3), pp. 1422-1435. Date of Electronic Publication: 2020 Dec 22.
Abstract: Diatoms are among the few eukaryotes known to store nitrate (NO 3 - ) and to use it as an electron acceptor for respiration in the absence of light and O 2 . Using microscopy and 15 N stable isotope incubations, we studied the relationship betw...
Sulfide alters microbial functional potential in a methane and nitrogen cycling biofilm reactor.
Publication Type: Academic Journal
Source(s): Environmental microbiology [Environ Microbiol] 2021 Mar; Vol. 23 (3), pp. 1481-1495. Date of Electronic Publication: 2020 Dec 23.
Abstract: Cross-feeding of metabolites between coexisting cells leads to complex and interconnected elemental cycling and microbial interactions. These relationships influence overall community function and can be altered by changes in substrate availability. He...
Rapid microbial diversification of dissolved organic matter in oceanic surface waters leads to carbon sequestration.
Publication Type: Academic Journal
Source(s): Scientific reports [Sci Rep] 2020 Aug 03; Vol. 10 (1), pp. 13025. Date of Electronic Publication: 2020 Aug 03.
Abstract: The pool of dissolved organic matter (DOM) in the deep ocean represents one of the largest carbon sinks on the planet. In recent years, studies have shown that most of this pool is recalcitrant, because individual compounds are present at low concentra...
The effect of sediment grain properties and porewater flow on microbial abundance and respiration in permeable sediments.
Publication Type: Academic Journal
Source(s): Scientific reports [Sci Rep] 2020 Feb 27; Vol. 10 (1), pp. 3573. Date of Electronic Publication: 2020 Feb 27.
Abstract: Sandy sediments cover 50-60% of the continental shelves and are highly efficient bioreactors in which organic carbon is remineralized and inorganic nitrogen is reduced to N 2 . As such they seem to play an important role, buffering the open ocean from ...
Single cell analyses reveal contrasting life strategies of the two main nitrifiers in the ocean.
Publication Type: Academic Journal
Source(s): Nature communications [Nat Commun] 2020 Feb 07; Vol. 11 (1), pp. 767. Date of Electronic Publication: 2020 Feb 07.
Abstract: Nitrification, the oxidation of ammonia via nitrite to nitrate, is a key process in marine nitrogen (N) cycling. Although oceanic ammonia and nitrite oxidation are balanced, ammonia-oxidizing archaea (AOA) vastly outnumber the main nitrite oxidizers, t...