A5073453571- Microbial Community Ecology and Physiology
- Methane Hydrates and Related Phenomena
- Protist diversity and phylogeny
- Wastewater Treatment and Nitrogen Removal
- Atmospheric and Environmental Gas Dynamics
- Marine and coastal ecosystems
- Genomics and Phylogenetic Studies
- Marine and coastal plant biology
- Microbial metabolism and enzyme function
- Autoimmune Bullous Skin Diseases
- Microbial Fuel Cells and Bioremediation
- Odor and Emission Control Technologies
- Coastal wetland ecosystem dynamics
- Dermatology and Skin Diseases
- Advancements in Transdermal Drug Delivery
- Marine Biology and Ecology Research
Max Planck Institute for Marine Microbiology
2017-2024
University of California, San Francisco
2003
Marine coastlines colonized by seagrasses are a net source of methane to the atmosphere. However, emissions from these environments still poorly constrained, and underlying processes responsible microorganisms remain largely unknown. Here, we investigated turnover in seagrass meadows
Methane-oxidizing bacteria represent a major biological sink for methane and are thus Earth's natural protection against this potent greenhouse gas. Here we show that in two stratified freshwater lakes substantial part of upward-diffusing was oxidized by filamentous gamma-proteobacteria related to Crenothrix polyspora. These have been known as contaminants drinking water supplies since 1870, but their role the environmental removal has remained unclear. While oxidizing methane, these...
Methanotrophic bacteria represent an important biological filter regulating methane emissions into the atmosphere. Planktonic methanotrophic communities in freshwater lakes are typically dominated by aerobic gamma-proteobacteria, with a contribution from alpha-proteobacterial methanotrophs and NC10 bacteria. The clade encompasses related to 'Candidatus Methylomirabilis oxyfera', which oxidize using unique pathway of denitrification that tentatively produces N2 O2 nitric oxide (NO). Here, we...
Abstract Symbiotic N 2 -fixing microorganisms have a crucial role in the assimilation of nitrogen by eukaryotes nitrogen-limited environments 1–3 . Particularly among land plants, symbionts occur variety distantly related plant lineages and often involve an intimate association between host symbiont 2,4 Descriptions such symbioses are lacking for seagrasses, which evolved around 100 million years ago from terrestrial flowering plants that migrated back to sea 5 Here we describe symbiont, ‘...
Abstract Mitochondria are specialized eukaryotic organelles that have a dedicated function in oxygen respiration and energy production. They evolved about 2 billion years ago from free-living bacterial ancestor (probably an alphaproteobacterium), process known as endosymbiosis 1,2 . Many unicellular eukaryotes since adapted to life anoxic habitats their mitochondria undergone further reductive evolution 3 As result, obligate anaerobic with mitochondrial remnants derive mostly fermentation 4...
Lacustrine methane emissions are strongly mitigated by aerobic methane-oxidizing bacteria (MOB) that typically most active at the oxic-anoxic interface. Although oxygen is required MOB for first step of oxidation, their occurrence in anoxic lake waters has raised possibility they capable oxidizing further anaerobically. Here, we investigate activity and growth Lake Zug, a permanently stratified freshwater lake. The rates anaerobic oxidation hypolimnion reached up to 0.2 µM d
Our multidisciplinary approach provides new insights into the ecophysiology of a newly isolated environmental Arcobacter species, as well physiological flexibility within genus and sulfide-oxidizing, denitrifying microbial communities oceanic oxygen minimum zones (OMZs). The chemolithoheterotrophic species peruensis may play substantial role in diverse consortium bacteria that is capable coupling denitrification fixed nitrogen loss to sulfide oxidation eutrophic, sulfidic coastal waters....
Summary Coastal oceans receive large amounts of anthropogenic fixed nitrogen (N), most which is denitrified in the sediment before reaching open ocean. Sandy sediments, are common coastal regions, seem to play an important role catalysing this N‐loss. Permeable sediments characterized by advective porewater transport, supplies high fluxes organic matter into sediment, but also leads fluctuations oxygen and nitrate concentrations. Little known about how denitrifying communities these adapted...
The cutaneous manifestations of autoimmune diseases, including systemic lupus erythematosus, are common and often recalcitrant to treatment. Unfortunately, therapy for other skin diseases has not advanced relies heavily on the use oral topical corticosteroids. Frequently, treatments prove less than ideal, either from toxicity or lack efficacy. A form immunomodulating transplant medication, tacrolimus (FK-506, Protopic), recently been developed approved in treating atopic dermatitis. Its...
The endosymbiont Candidatus Azoamicus ciliaticola generates ATP for its eukaryotic host, an anaerobic ciliate of the Plagiopylea class, fulfilling a function analogous to mitochondria in other cells. discovery this respiratory endosymbiosis has major implications both evolutionary history and ecology microbial eukaryotes. However, with only single species described, knowledge environmental distribution diversity is limited. Here we report four new complete, circular metagenome assembled...