Article (Scientific journals)
Influences of geothermal sulfur bacteria on a tropical coastal food web
Pascal, P. Y.; Dubois, S. F.; Goffette, A. et al.
2017In Marine Ecology. Progress Series, 578, p. 73-85
Peer Reviewed verified by ORBi
 

Files


Full Text
Pascal, 2017.pdf
Publisher postprint (608.9 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
stable isotopes; sulphur; Guadeloupe; Damselfish
Abstract :
[en] ABSTRACT: The activity of the geothermal plant at Bouillante in Guadeloupe (French West Indies) releases thioautotrophic bacteria into the coastal environment. Fish counts reveal that fish abundance increases with higher availability of this bacterial resource. In order to evaluate the trophic role of these bacteria, isotopic compositions (C, N, S) of potential consumers were evaluated on transects at increasing distance from the source of bacteria. The 3 mobile fish species examined (<i>Abudefduf saxatilis</i>, <i>Acanthurus bahianus</i>, and <i>Stegastes partitus</i>) ingested and assimilated chemosynthetic bacteria. Similarly, the isotopic composition of the mobile sea urchin <i>Diadema antillarum</i> was different close to the discharge channel, suggesting a diet mainly composed of sulfur bacteria. In contrast, endofauna sampled from the nematode community did not show a diet influence by chemosynthetic bacteria. A broad variety of epifaunal organisms with passive and active suspension-feeding activities were also investigated, including sponges (<i>Aplysina fistularis</i> and <i>Iotrochota birotulata</i>), barnacles (<i>Balanus</i> sp.), bivalve molluscs (<i>Spondylus tenuis</i>) and cnidarians (<i>Pseudopterogorgia</i> sp.), but no strong evidence for sulfur bacteria contributions were determined in the diets of any of these organisms. This was also true for the omnivorous predator annelid <i>Hermodice carunculata</i>. In this coastal oligotrophic environment, only certain opportunistic species seem to benefit from the emergence of a new food item such as chemosynthetic bacteria.
Disciplines :
Zoology
Environmental sciences & ecology
Aquatic sciences & oceanology
Author, co-author :
Pascal, P. Y.;  Université des Antilles > UMR 7138 Evolution Paris-Seine > Equipe biologie de la mangrove
Dubois, S. F.;  IFREMER - Centre de Bretagne > DYNECO LEBCO
Goffette, A.;  Université des Antilles > UMR 7138 Evolution Paris-Seine > Equipe biologie de la mangrove
Lepoint, Gilles  ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Language :
English
Title :
Influences of geothermal sulfur bacteria on a tropical coastal food web
Publication date :
2017
Journal title :
Marine Ecology. Progress Series
ISSN :
0171-8630
eISSN :
1616-1599
Publisher :
Inter-Research Science Publishing, Oldendorf Luhe, Germany
Volume :
578
Pages :
73-85
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 06 October 2017

Statistics


Number of views
55 (6 by ULiège)
Number of downloads
24 (0 by ULiège)

Scopus citations®
 
2
Scopus citations®
without self-citations
1
OpenCitations
 
2

Bibliography


Similar publications



Contact ORBi