Open AccessJournal Article
Microbial extracellular polymeric substances in marine biogeochemical processes
P.V. Bhaskar,Narayan B. Bhosle +1 more
287
TL;DR: Findings on EPS and their significance in biogeochemical processes are focused on microorganisms grow in free planktonic statediscussed with respect to their role in marine microbial ecology, marine food-web and other areas of future research.
read more
Abstract: Microbial extracellular polymeric substances (EPS) are widely distributed in marine environments and are found in free dissolved form, colloids, discreet particles like TEP and/or associated with particulate matter, including cell aggregates, detritus, biofilms, microbial mats, etc. The chemical composition of EPS is influenced by various factors, including nutrients, temperature, pH, physiology and age of the culture. Microbial EPS perform various functions, and are nvolved in diverse marinei processes. The unique gelling properties of icrobial mEPS are considered important in the transport and trans-formation of organic matter, complexation of dissolved metals and biogeochemical cycling of elements. EPS are rich in organic carbon and therefore are an important source of carbon for different organisms in the food chain. The production of dissolved EPS during the bacterial growth, production of particulate rganic ocarbon from the dissolved EPS and enzymatic breakdown and conversion of particulate EPS into dissolved rganic omatter within the microbial loop, form an mportant ialternate route of organic carbon cycling in the arine mtrophic web. In this article, ecent findings on EPSr and their significance in biogeochemical processes areMicroorganisms grow in free planktonic statediscussed with respect to their role in marine microbial ecology, marine food-web and other areas of future research.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Processes of carbonate precipitation in modern microbial mats
Christophe Dupraz,R. Pamela Reid,Olivier Braissant,Alan W. Decho,R. Sean Norman,Pieter T. Visscher +5 more
TL;DR: The specific role of microbes and the EPS matrix in various mineralization processes are reviewed and examples of modern aquatic (freshwater, marine and hypersaline) and terrestrial microbialites are discussed.
Production and harvesting of microalgae for wastewater treatment, biofuels, and bioproducts
Logan Christenson,Ronald C. Sims +1 more
TL;DR: Further investigation and development of large-scale production and harvesting methods for biofuels and bioproducts are necessary, particularly with less studied but promising approaches such as those involving attached algal biofilm cultures.
1.4K
Overview of microalgal extracellular polymeric substances (EPS) and their applications.
TL;DR: Previous research on microalgal EPS derived from green algae, diatoms and red algae is summarized, including compositions/functions/structure, production, and potential applications.
687
Interactions between microplastics and phytoplankton aggregates: Impact on their respective fates
Marc Long,Brivaëla Moriceau,Morgane Gallinari,Christophe Lambert,Arnaud Huvet,Jean Raffray,Philippe Soudant +6 more
TL;DR: The results clearly show that marine aggregates can be an efficient sink for microplastics by influencing their vertical distribution in the water column, and opens new questions regarding the impact of plastics on sedimentation fluxes in oceans.
625
Microbial Extracellular Polymeric Substances (EPSs) in Ocean Systems.
Alan W. Decho,Tony Gutierrez +1 more
TL;DR: An overview of the roles of exopolymer in oceans suggests that EPS contribute to efficient trophic-transfer of environmental contaminants, and may provide a protective refugia for pathogenic cells within marine systems; one that enhances their survival/persistence.
References
Bacterial mediation of carbon fluxes during a diatom bloom in a mesocosm
TL;DR: It is hypothesized that the action of bacterial ectoenzyme on diatom surfaces inhibited diatom aggregation by reducing stickiness, thus prolonging the bloom and allowing the accumulation of extremely high chl a levels prior to aggregation.
319
The role of surface-active carbohydrates in the flocculation of a diatom bloom in a mesocosm
TL;DR: The finding of a highly surface-active, deoxysugar-rich polysaccharide material that can be rapidly (<0.5 h) and selectively extracted by bubble adsorption is significant, as it is apparent that this material played important roles in particle stickiness and TEP formation in the tank, and thus it may, at times, play similar roles in particles aggregation in the sea.
310
Formation of transparent exopolymer particles, TEP, from dissolved precursor material
TL;DR: It is suggested that freshly released precursors are fibrillar and that these fibrillsar precursor form larger colloids and eventually TEP within hours to days after their release.
A comparison of the chemical characteristics of oceanic DOM and extracellular DOM produced by marine algae
TL;DR: It is indicated that APS isolated from the surface ocean can have a direct algal source and that APs may accumulate in seawater as a result of its metabolic resistance.
Isolation and characterization of extracellular polysaccharides from the epipelic diatoms Cylindrotheca closterium and Navicula salinarum
TL;DR: Investigation of the production and composition of extracellular polymeric substances (EPS) in axenic batch cultures of the benthic marine epipelic diatoms Navicula salinarum and Cylindrotheca closterium found that glucose and xylose were the main constituents, but several other monosaccharides were present in smaller quantities.
240