Record Details

Distribution of phototrophic thionic bacteria in the anaerobic and micro-aerophilic strata of mangrove ecosystem of Cochin

CMFRI Repository

View Archive Info
 
 
Field Value
 
Relation http://eprints.cmfri.org.in/1096/
 
Title Distribution of phototrophic thionic bacteria in the anaerobic and micro-aerophilic strata of mangrove ecosystem of Cochin
 
Creator Chandrika, V
Nair, P V Ramachandran
Khambadkar, L R
 
Subject Marine Ecosystems
Mangroves
 
Description Dense population of epipelic photoautotrophic bacteria were found in the surface sediments
during April 1984 to October 1984 in the mangrove ecosystem of Cochin. Pigment analysis by Spectrophotometric techniques re:vealed the structure and relative abundance of the populations. Maximum
bacterio-chlorophyll ' a ' was encountered in May (1650.6 mg/m-') whereas bacteriochlorophvll
‘c'and 'd' were found to be more during April 1984(1069.2mg/m-' and 510mg/m-° respectively).
The bacterial pigments developed in the anoxic cultures in the present investigation showed absorp'
tion maximum at 662 nm, therefore it can be classified as ' Chlorobium dilorophyll 660'. The
predominant bacteria were identified as members of the genera Chloronema, Chromatium, Begggiatoa,
Thiopedia an d Leucothiobacterla. Unidentified brown Chlorobiaceae were present. Maximal development
of the population was found during April 1984. The distribution of oxygen, temperature
salinity, pH and Eh profiles were determined. Phototrophic sulfur bacteria ranged from 4.2-19.4%
of the total anaerobes isolated. The main factors determining the growth of green sulfur bacteria
were light and high sulfide concentration whereas the growth of purple sulfur bacteria was mainly controlled by subdued light and low sulfide concentration during the experimental period.
 
Publisher MBAI
 
Date 1990
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/1096/1/Chan_77-84.pdf
Chandrika, V and Nair, P V Ramachandran and Khambadkar, L R (1990) Distribution of phototrophic thionic bacteria in the anaerobic and micro-aerophilic strata of mangrove ecosystem of Cochin. Journal of the Marine Biological Association of India, 32 (1&2). pp. 77-84.