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An overview of the microbenthic loop in Posidonia oceanica meadows: the good, the bad and the ugly
Pete, Dorothée; Quattrocchi, Loïc; Velimirov, Branko et al.
2012In Creed, J.C.; Oigman-Pszczol, S.S. (Eds.) Proceedings of the 10th International Seagrass Biology Workshop (ISBW10), 25- 30 November 2012, Armação dos Búzios, Brazil
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Keywords :
seagrass; sediment; microbenthic loop
Abstract :
[en] Posidonia oceanica is an endemic seagrass of the Mediterranean Sea. The ecosystem based on this plant is essential from an ecological and economical point of view (commercial species, touristic activities, oxygen production), though very sensitive to environmental perturbations. To detect those perturbations, scientists are trying to find more efficient ecological indicators. Most of the time, those indicators are based on the plant itself. Unfortunately, this seagrass does not react very quickly to perturbations so, when a reaction is noticed, it is often too late to prevent irremediable damages to the ecosystem. The sedimentary compartment of P. oceanica meadows has been less studied than the canopy level. However, it could be a good source of ecological indicators because it is the final container of all the pollution. In this framework, the microbenthic loop has been studied. It is a major subsystem of those meadows and encompasses organic matter, bacteria, microphytobenthos and meiofauna. As those organisms have a rapid turnover and stay almost all their life inside the sediment, they seemed good potential indicators. This presentation will show what is useful or not inside the sediment and more specifically inside the microbenthic loop. Results of a comparison between a fish farm and a reference location will be used, as well as in situ experiments (shading and sediment loading) and small spatial scale variations. At the end of this presentation, you will know what are the good, the bad and the ugly in the sedimentary compartment of a P. oceanica meadow.
Research center :
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
Disciplines :
Aquatic sciences & oceanology
Zoology
Environmental sciences & ecology
Author, co-author :
Pete, Dorothée ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanologie
Quattrocchi, Loïc;  Université de Liège - ULiège > Biologie, Ecologie et Evolution > Laboratoire d'Océanologie
Velimirov, Branko;  Medizinische Universität Wien > Microbiology, Molecular Biology and Virology
Lepoint, Gilles  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanologie
Gobert, Sylvie  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanologie
Language :
English
Title :
An overview of the microbenthic loop in Posidonia oceanica meadows: the good, the bad and the ugly
Publication date :
November 2012
Event name :
10th International Seagrass Biology Workshop
Event organizer :
Instituto Biodiversidade Marinha
Universidade do Estado do Rio de Janeiro
Event place :
Armação dos Búzios, Brazil
Event date :
du 25 Novembre 2012 au 30 Novembre 2012
Audience :
International
Main work title :
Proceedings of the 10th International Seagrass Biology Workshop (ISBW10), 25- 30 November 2012, Armação dos Búzios, Brazil
Editor :
Creed, J.C.
Oigman-Pszczol, S.S.
Publisher :
Instituto Biodiversidade Marinha, Rio de Janeiro, Brazil
Pages :
39
Peer reviewed :
Peer reviewed
Name of the research project :
Utilisation de l'exergie pour mesurer et détecter les effets des perturbations affectant les herbiers à Posidonia oceanica (L.) Delile: caractérisation au sein du compartiment sédimentaire.
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Programme ARC.RACE 0510/333
Université de Liège, Subsides "Missions scientifiques à l'étranger" du Patrimoine
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