ORBi: Pete Dorothée - The use of Eco-Exergy in Oceanology: Application to Posidonia oceanica meadows

Reference : The use of Eco-Exergy in Oceanology: Application to Posidonia oceanica meadows


	Document type :	Scientific congresses and symposiums : Unpublished conference
	Discipline(s) :	Life sciences : Environmental sciences & ecology Engineering, computing & technology : Multidisciplinary, general & others Life sciences : Aquatic sciences & oceanology
	To cite this reference:	http://hdl.handle.net/2268/103603

Title :	The use of Eco-Exergy in Oceanology: Application to Posidonia oceanica meadows
Language :	English
Alternative title :	[fr] Utilisation de l'Eco-exergie en Océanologie: Application aux herbiers à Posidonia oceanica
Author, co-author :	Pete, Dorothée [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Océanologie >]
	Velimirov, Branko [ > > ]
	Gobert, Sylvie [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Océanologie >]
Publication date :	17-Jun-2011
On invitation :	Yes
Audience :	International
Event name :	International Conference on Exergy: Exergy to define structure and quality of materials, energy, and ecosystems
Event date :	17 juin 2011
Event organizer :	Université Paris Ouest Nanterre la Défense, Pôle Scientifique et Technologique de Ville d’Avray, Laboratoire Energetics Materials Electromagnetism (LEME)
Event place (city) :	Paris
Event country :	France
Keywords :	[en] exergy ; ecosystems ; Posidonia oceanica ; STARESO ; Mediterranean Sea
Abstract :	[en] In classic thermodynamics, exergy is defined as the useful work a system can perform when brought into equilibrium with its environment. It represents a measure of the distance from thermodynamic equilibrium. From that definition, some researchers (S.E. Jørgensen) have decided to apply this theory to ecosystems and called this expression of exergy “Eco-exergy”. According to this theory, a developing ecosytem trends to go far from its thermodynamic equilibrium and its exergy content trends to increase. Thus, the Laboratory of Oceanology of the University of Liege has decided to apply this quite new theory to Posidonia oceanica meadows, an endemic ecosystem of the Mediterranean coastal zone. This ecosystem is known as a good environmental quality indicator. So it was choosen to test the relevance of eco-exergy index as a quality indicator in the Mediterranean Sea. As this ecosystem is complex, this study focuses on the sedimentary compartment and the microbenthic loop (organic matter, bacteria, microphytobenthos and meiofauna). Some estimations of this eco-exergy index in the sedimentary compartment of a P. oceanica meadow are presented here. According to them, it seems that the eco-exergy index is not sensitive enough to catch effects of perturbations in this ecosystem.
Research units :	Laboratoire d'Océanologie, ULg
Funders :	Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Programme ARC.RACE 0510/333
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.
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/103603

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