Topics

Aerobic anoxygenic phototrophs are highly abundant in hypertrophic and polyhumic waters.

08:00 EDT 10th July 2019 | BioPortfolio

Summary of "Aerobic anoxygenic phototrophs are highly abundant in hypertrophic and polyhumic waters."

Aerobic anoxygenic phototrophs (AAPs) are a group of photoheterotrophic bacteria common in natural waters. Here, AAP abundance, and contribution to total bacterial abundance and biomass were investigated to test whether the trophic status of a lake or content of coloured dissolved organic matter (CDOM) play a role in determining AAP distribution and abundance in shallow inland lakes, with special focus on hypertrophic and polyhumic waters. Twenty-six different shallow lakes in Hungary were monitored. AAP abundance and biomass were determined by epifluorescence microscopy. The lakes exhibit a broad range of CDOM (2-7000 mg Pt L-1) and phytoplankton biomass (2-1200 μg L-1 chlorophyll a concentration). Very high AAP abundance (up to 3 × 107 cells mL-1) was observed in polyhumic and hypertrophic shallow lakes. AAP abundance was influenced by phytoplankton biomass and CDOM content, and these effects were interrelated. As determined, 40 μg L-1 chlorophyll a and 52 mg Pt L-1 CDOM are threshold levels above which these effects have a synergistic relationship. Hence, the observed high AAP abundance in some soda pans is a consequence of combined hypertrophy and high CDOM content. AAP contribution was influenced by TSS content: the success of AAP cells could be explained by high TSS levels, which might be explained by the decrease of their selective grazing control.

Affiliation

Journal Details

This article was published in the following journal.

Name: FEMS microbiology ecology
ISSN: 1574-6941
Pages:

Links

DeepDyve research library

PubMed Articles [7793 Associated PubMed Articles listed on BioPortfolio]

In situ abundance and carbon fixation activity of distinct anoxygenic phototrophs in the stratified seawater lake Rogoznica.

Sulfide-driven anoxygenic photosynthesis is an ancient microbial metabolism that contributes significantly to inorganic carbon fixation in stratified, sulfidic water bodies. Methods commonly applied t...

The trouble with oxygen: The ecophysiology of extant phototrophs and implications for the evolution of oxygenic photosynthesis.

The ability to harvest light to drive chemical reactions and gain energy provided microbes access to high energy electron donors which fueled primary productivity, biogeochemical cycles, and microbial...

Flourishing deep-sea AAP bacteria detected by flow cytometric sorting and molecular analysis.

Pigmented bacteria cells, including aerobic anoxygenic phototrophic (AAP) bacteria, contribute significantly to secondary production and aquatic carbon cycling but their distribution in the deep sea i...

Isolation and identification of a salt-tolerant aerobic denitrifying bacterial strain and its application to saline wastewater treatment in constructed wetlands.

A salt-tolerant aerobic denitrifying bacterium, Zobellella denitrificans strain A63, was isolated, and its effects on the efficiency of denitrification of saline wastewater and the denitrifying microb...

The demanding grey zone: Sport indices by cardiac magnetic resonance imaging differentiate hypertrophic cardiomyopathy from athlete's heart.

We aimed to characterize gender specific left ventricular hypertrophy using a novel, accurate and less time demanding cardiac magnetic resonance (CMR) quantification method to differentiate physiologi...

Clinical Trials [2198 Associated Clinical Trials listed on BioPortfolio]

Outcome of Different Pathogenic Mutations in Hypertrophic Cardiomyopathy

This is a prospective, single-center study to assess clinical phenotype and prognosis of different pathogenic mutations in Chinese patients with hypertrophic cardiomyopathy. Patients with ...

Treatment of Hypertrophic Scars With Intradermal Botox

This is a prospective, open label, single center, self-controlled clinical study to demonstrate the safety and efficacy of intradermal botulinum toxin in treating hypertrophic scarring.

Sleep Apnea and Hypertrophic Cardiomyopathy (HCM)

The investigators are trying to find out how common sleep apnea is in hypertrophic cardiomyopathy. The purpose of this study is to see if sleep apnea is common in hypertrophic cardiomyopat...

Use of Magnetic Field Mapping in the Evaluation of Patients With Hypertrophic Heart Disease (Thick Heart Muscle)

The purpose of this research study is to further establish the diagnostic use of magnetocardiography (MCG) in patients with hypertrophic cardiomyopathy (HCM). The use of MCG has not been ...

Evaluating Microvascular Dysfunction in Symptomatic Patients With HypertroPhic CaRdiomyopathy

Patients with hypertrophic cardiomyopathy are being compared to a control group. IMR will be assessed with a pressure wire. Clinical f/u at 3 months and 6 months and a 48 hour holter monit...

Medical and Biotech [MESH] Definitions

A genus of gram-positive, aerobic bacteria whose species are widely distributed and are abundant in soil. Some strains are pathogenic opportunists for humans and animals.

An autosomal dominant inherited form of HYPERTROPHIC CARDIOMYOPATHY. It results from any of more than 50 mutations involving genes encoding contractile proteins such as VENTRICULAR MYOSINS; cardiac TROPONIN T; ALPHA-TROPOMYOSIN.

A sharply elevated, irregularly shaped, progressively enlarging scar resulting from formation of excessive amounts of collagen in the dermis during connective tissue repair. It is differentiated from a hypertrophic scar (CICATRIX, HYPERTROPHIC) in that the former does not spread to surrounding tissues.

Therapy by various hot or warm baths in natural mineral waters, spas, or "cures". It includes not only bathing in, but also drinking the waters, but it does not include whirlpool baths (HYDROTHERAPY).

A family of aerobic gram-negative rods that are nitrogen fixers. They are highly viscous, and appear as a semitransparent slime in giant colonies.

Quick Search


DeepDyve research library

Searches Linking to this Article