Accumulation of NH4+ and NO3− inside Biofilms of Natural Microbial Consortia: Implication on Nutrients Seasonal Dynamic in Aquatic Ecosystems

Microbial biofilms are ubiquitous in aquatic ecosystems. Inside the biofilm is the nutrient-rich microenvironment promoted by the accumulation of the nutrient ions such as NH4+ and NO3− from surrounding water. The present study investigated the characteristics of NH4+ and NO3− accumulation into the...

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Main Authors: Andi Kurniawan, Tatsuya Yamamoto
Format: Article
Language:English
Published: Wiley 2019-01-01
Series:International Journal of Microbiology
Online Access:http://dx.doi.org/10.1155/2019/6473690
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author Andi Kurniawan
Tatsuya Yamamoto
author_facet Andi Kurniawan
Tatsuya Yamamoto
author_sort Andi Kurniawan
collection DOAJ
description Microbial biofilms are ubiquitous in aquatic ecosystems. Inside the biofilm is the nutrient-rich microenvironment promoted by the accumulation of the nutrient ions such as NH4+ and NO3− from surrounding water. The present study investigated the characteristics of NH4+ and NO3− accumulation into the biofilm of natural microbial consortia collected from Lake Biwa, Japan. The results showed the following: (1) the concentrations of NH4+ and NO3− inside the biofilm were much higher than those in the surrounding water; (2) the nutrient ion concentration inside the biofilm changed in synchrony with those in the surrounding water; (3) biofilm polymers have both positively and negatively charged sites; (4) electrostatic attractive interactions between the charged sites on biofilm polymers and oppositely charged ions outside the biofilm seem to play important roles in the accumulation of nutrient ions into the biofilm from the surrounding water; (5) the bacterial community structure differs between the biofilm and surrounding water. The present study revealed that the accumulation of nutrient ions into the biofilm indicates the removal of these ions from water outside the biofilm. According to the result of this study, accumulation of ions such as NH4+ and NO3− into the biofilm of natural microbial consortia may have implications on nutrients seasonal dynamic in aquatic ecosystems.
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spelling doaj-art-a745647a0b5848a09020fe58ebe43bf52025-02-03T01:31:20ZengWileyInternational Journal of Microbiology1687-918X1687-91982019-01-01201910.1155/2019/64736906473690Accumulation of NH4+ and NO3− inside Biofilms of Natural Microbial Consortia: Implication on Nutrients Seasonal Dynamic in Aquatic EcosystemsAndi Kurniawan0Tatsuya Yamamoto1Department of Aquatic Resources Management, University of Brawijaya, Malang 65145, IndonesiaCollege of Life Science, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga, JapanMicrobial biofilms are ubiquitous in aquatic ecosystems. Inside the biofilm is the nutrient-rich microenvironment promoted by the accumulation of the nutrient ions such as NH4+ and NO3− from surrounding water. The present study investigated the characteristics of NH4+ and NO3− accumulation into the biofilm of natural microbial consortia collected from Lake Biwa, Japan. The results showed the following: (1) the concentrations of NH4+ and NO3− inside the biofilm were much higher than those in the surrounding water; (2) the nutrient ion concentration inside the biofilm changed in synchrony with those in the surrounding water; (3) biofilm polymers have both positively and negatively charged sites; (4) electrostatic attractive interactions between the charged sites on biofilm polymers and oppositely charged ions outside the biofilm seem to play important roles in the accumulation of nutrient ions into the biofilm from the surrounding water; (5) the bacterial community structure differs between the biofilm and surrounding water. The present study revealed that the accumulation of nutrient ions into the biofilm indicates the removal of these ions from water outside the biofilm. According to the result of this study, accumulation of ions such as NH4+ and NO3− into the biofilm of natural microbial consortia may have implications on nutrients seasonal dynamic in aquatic ecosystems.http://dx.doi.org/10.1155/2019/6473690
spellingShingle Andi Kurniawan
Tatsuya Yamamoto
Accumulation of NH4+ and NO3− inside Biofilms of Natural Microbial Consortia: Implication on Nutrients Seasonal Dynamic in Aquatic Ecosystems
International Journal of Microbiology
title Accumulation of NH4+ and NO3− inside Biofilms of Natural Microbial Consortia: Implication on Nutrients Seasonal Dynamic in Aquatic Ecosystems
title_full Accumulation of NH4+ and NO3− inside Biofilms of Natural Microbial Consortia: Implication on Nutrients Seasonal Dynamic in Aquatic Ecosystems
title_fullStr Accumulation of NH4+ and NO3− inside Biofilms of Natural Microbial Consortia: Implication on Nutrients Seasonal Dynamic in Aquatic Ecosystems
title_full_unstemmed Accumulation of NH4+ and NO3− inside Biofilms of Natural Microbial Consortia: Implication on Nutrients Seasonal Dynamic in Aquatic Ecosystems
title_short Accumulation of NH4+ and NO3− inside Biofilms of Natural Microbial Consortia: Implication on Nutrients Seasonal Dynamic in Aquatic Ecosystems
title_sort accumulation of nh4 and no3 inside biofilms of natural microbial consortia implication on nutrients seasonal dynamic in aquatic ecosystems
url http://dx.doi.org/10.1155/2019/6473690
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AT tatsuyayamamoto accumulationofnh4andno3insidebiofilmsofnaturalmicrobialconsortiaimplicationonnutrientsseasonaldynamicinaquaticecosystems