Advertisement

Topics

Relationship between dissolved organic matter quality and microbial community composition across polar glacial environments.

08:00 EDT 14th May 2018 | BioPortfolio

Summary of "Relationship between dissolved organic matter quality and microbial community composition across polar glacial environments."

Vast expanses of Earth's surface are covered by ice, with microorganisms in these systems affecting local and global biogeochemical cycles. We examined microbial assemblages from habitats fed by glacial meltwater within the McMurdo Dry Valleys, Antarctica, and on the west Greenland Ice Sheet, (GrIS) evaluating potential physicochemical factors explaining trends in community structure. Microbial assemblages present in the different Antarctic dry valley habitats were dominated by Sphingobacteria and Flavobacteria, while Gammaproteobacteria and Sphingobacteria prevailed in west GrIS supraglacial environments. Microbial assemblages clustered by location (Canada Glacier, Cotton Glacier, west GrIS) and were separated by habitat type (i.e. ice, cryoconite holes, supraglacial lakes, sediment, and stream water). Community dissimilarities were strongly correlated with dissolved organic matter (DOM) quality. Microbial meltwater assemblages were most closely associated with different protein-like components of the DOM pool. Microbes in environments with mineral particles (i.e. stream sediments, cryoconite holes) were linked to DOM containing more humic-like fluorescence. Our results demonstrate the establishment of distinct microbial communities within ephemeral glacial meltwater habitats, with DOM-microbe interactions playing an integral role in shaping communities on local and polar spatial scales.

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 [20827 Associated PubMed Articles listed on BioPortfolio]

Intriguing changes in molecular size and composition of dissolved organic matter induced by microbial degradation and self-assembly.

Dissolved organic matter (DOM) is ubiquitous and plays an important role in regulating water quality, ecological function, and the fate and transport of trace elements and pollutants in aquatic enviro...

Reduction in the exchange of coastal dissolved organic matter and microgels by inputs of extra riverine organic matter.

Rivers drive large amounts of terrestrial and riverine organic matter into oceans. These organic materials may alter the self-assembly of marine dissolved organic matter (DOM) polymers into microgels ...

The microbial transformation of 17β‑estradiol in an anaerobic aqueous environment is mediated by changes in the biological properties of natural dissolved organic matter.

Dissolved organic matter (DOM) is shown to act as an electron shuttle mediator which enhances the microbial degradation of steroid estrogens in natural water. Batch studies were conducted with 17β‑...

The Case Against Charge Transfer Interactions in Dissolved Organic Matter Photophysics.

The optical properties of dissolved organic matter influence chemical and biological processes in all aquatic ecosystems. Organic matter optical properties have been attributed to a charge-transfer mo...

Effects of short-term warming and nitrogen addition on the quantity and quality of dissolved organic matter in a subtropical Cunninghamia lanceolata plantation.

Increasing temperature and nitrogen (N) deposition are two large-scale changes projected to occur over the coming decades. The effects of these changes on dissolved organic matter (DOM) are largely un...

Clinical Trials [5147 Associated Clinical Trials listed on BioPortfolio]

A Study of the Relationship of Gut Microbial Composition and Stroke Outcome

The purpose of this pilot study is to investigate the relationship between gut microbial composition and stroke outcome. If we can establish a relationship between gastrointestinal microbi...

The Relationship Between Right-to-left Shunt and Brain White Matter Lesions in Patients With Migraine

The purpose of the study is to evaluate the prevalence of white matter lesions in Chinese migraineurs with and without right-to-left shunt. The aim is to study the relationship among right...

AROPE : Early Ovarian Reserve Decreased : Impact of Exposure to Persistent Endocrine Disruptors and Organic Solvents

Early ovarian reserve decreased is one of the main causes of infertility for women after 35 years. The relationship between this decreased and exposure to chemicals, including persistent e...

Identification of Volatile Organic Compounds in Exhaled Air During Exacerbation of Chronic Obstructive Pulmonary Disease

Exacerbations of the disease are a hallmark of Chronic Obstructive Pulmonary Disease (COPD), affecting the decline of pulmonary function, quality of life and increasing morbidity. The use ...

Organic Diet Intervention in Primary School Children

The study aims to evaluate the hypothesized benefits of a systematic organic diet for children, over those of a conventional diet. The specific objectives of this study are to: i) Demonstr...

Medical and Biotech [MESH] Definitions

Ratings of the characteristics of food including flavor, appearance, nutritional content, and the amount of microbial and chemical contamination.

The circulation of nitrogen in nature, consisting of a cycle of biochemical reactions in which atmospheric nitrogen is compounded, dissolved in rain, and deposited in the soil, where it is assimilated and metabolized by bacteria and plants, eventually returning to the atmosphere by bacterial decomposition of organic matter.

The collective designation of three organizations with common membership: the European Economic Community (Common Market), the European Coal and Steel Community, and the European Atomic Energy Community (Euratom). It was known as the European Community until 1994. It is primarily an economic union with the principal objectives of free movement of goods, capital, and labor. Professional services, social, medical and paramedical, are subsumed under labor. The constituent countries are Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, Netherlands, Portugal, Spain, Sweden, and the United Kingdom. (The World Almanac and Book of Facts 1997, p842)

Any substance in the air which could, if present in high enough concentration, harm humans, animals, vegetation or material. Substances include GASES; PARTICULATE MATTER; and volatile ORGANIC CHEMICALS.

The presence of contaminants or pollutant substances in the air (AIR POLLUTANTS) that interfere with human health or welfare, or produce other harmful environmental effects. The substances may include GASES; PARTICULATE MATTER; or volatile ORGANIC CHEMICALS.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Searches Linking to this Article