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The role of free and attached microorganisms in the decomposition of estuarine macrophyte detritus

Anesio, Alexandre Magno LU ; Abreu, PC and Biddanda, BA (2003) In Estuarine, Coastal and Shelf Science 56(2). p.197-201
Abstract
Abundance and respiration of free and attached microorganisms were monitored during the decomposition of the seagrass Scirpus maritimus leaves in laboratory microcosms for 30 days. There was a clear succession between bacteria and heterotrophic flagellates during the course of the study. The beginning of the study (1-4 days) was characterized by higher rates of bacterial respiration, compared to the later periods. Free microorganisms were responsible for more than half of the respiration (65%) within the microcosms, suggesting that they were responsible for the mineralization of the bulk of the macrophyte detritus following its dissolution. On the other hand, estimates of activity on a per cell basis revealed that individual attached... (More)
Abundance and respiration of free and attached microorganisms were monitored during the decomposition of the seagrass Scirpus maritimus leaves in laboratory microcosms for 30 days. There was a clear succession between bacteria and heterotrophic flagellates during the course of the study. The beginning of the study (1-4 days) was characterized by higher rates of bacterial respiration, compared to the later periods. Free microorganisms were responsible for more than half of the respiration (65%) within the microcosms, suggesting that they were responsible for the mineralization of the bulk of the macrophyte detritus following its dissolution. On the other hand, estimates of activity on a per cell basis revealed that individual attached bacteria had much higher (3- to 4-fold) respiration rates than free bacteria, suggesting attached bacterial activity may play a key role in the breakdown and dissolution of particulate detritus in estuarine waters. The findings suggest different but coupled roles for attached and free bacteria in nature. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
free-living bacteria, particle-attached bacteria, detritus, Scirpus, Patos Lagoon, decomposition
in
Estuarine, Coastal and Shelf Science
volume
56
issue
2
pages
197 - 201
publisher
Elsevier
external identifiers
  • wos:000182023900001
  • scopus:0037305587
ISSN
1096-0015
DOI
10.1016/S0272-7714(02)00152-X
language
English
LU publication?
yes
id
ae209f8b-5463-4e23-8ef9-f3ec4f9534f2 (old id 907680)
date added to LUP
2008-01-10 10:47:47
date last changed
2018-01-07 06:27:26
@article{ae209f8b-5463-4e23-8ef9-f3ec4f9534f2,
  abstract     = {Abundance and respiration of free and attached microorganisms were monitored during the decomposition of the seagrass Scirpus maritimus leaves in laboratory microcosms for 30 days. There was a clear succession between bacteria and heterotrophic flagellates during the course of the study. The beginning of the study (1-4 days) was characterized by higher rates of bacterial respiration, compared to the later periods. Free microorganisms were responsible for more than half of the respiration (65%) within the microcosms, suggesting that they were responsible for the mineralization of the bulk of the macrophyte detritus following its dissolution. On the other hand, estimates of activity on a per cell basis revealed that individual attached bacteria had much higher (3- to 4-fold) respiration rates than free bacteria, suggesting attached bacterial activity may play a key role in the breakdown and dissolution of particulate detritus in estuarine waters. The findings suggest different but coupled roles for attached and free bacteria in nature.},
  author       = {Anesio, Alexandre Magno and Abreu, PC and Biddanda, BA},
  issn         = {1096-0015},
  keyword      = {free-living bacteria,particle-attached bacteria,detritus,Scirpus,Patos Lagoon,decomposition},
  language     = {eng},
  number       = {2},
  pages        = {197--201},
  publisher    = {Elsevier},
  series       = {Estuarine, Coastal and Shelf Science},
  title        = {The role of free and attached microorganisms in the decomposition of estuarine macrophyte detritus},
  url          = {http://dx.doi.org/10.1016/S0272-7714(02)00152-X},
  volume       = {56},
  year         = {2003},
}