|Reference : The role of meiofauna in energy transfer in a Mediterranean seagrass bed (Calvi, Corsica)|
|Scientific congresses and symposiums : Poster|
|Life sciences : Zoology|
Life sciences : Aquatic sciences & oceanology
Life sciences : Environmental sciences & ecology
|The role of meiofauna in energy transfer in a Mediterranean seagrass bed (Calvi, Corsica)|
|MASCART, THIBAUD [Universiteit Gent - Ugent > Marine Biology > > >]|
|Lepoint, Gilles [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Océanologie >]|
|Borges, Alberto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique >]|
|Darchambeau, François [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique >]|
|Dauby, Patrick [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Systématique et diversité animale >]|
|De troch, Marleen [Universiteit Gent - Ugent > Marine Biology > > >]|
|17th Benelux Congress of Zoology (GENT 22-23 October 2010)|
|du 22 octobre 2010 au 23 octobre 2010|
|the Royal Belgian Zoological Society (Prof D Adriaens)|
|[en] meiofauna ; seagrass ; phytodetritus ; stable isotope ; harpacticoid ; food web ; stareso|
|[en] Meiofaunal communities of the endemic Mediterranean seagrass, Posidonia oceanica, were sampled in five different habitats characterised by different degradation level of macrophytodetritus. In term of abundance, harpacticoid copepods represent half of the community followed by nematodes and polychaetes. Two meiofauna communities were distinguished: (1) a benthic community of meiofauna, living in the sediment or on highly fragmented macrophytodetritus, and (2) a foliar, epiphytal community associated with seagrass leaves and low fragmented macrophytodetritus leaves. They differed significantly in their harpacticoid copepod family composition. The benthic community consisted mainly of families like Tisbidae and Miraciidae, while the epiphytal community was dominated by families like Thalestridae and Laophontidae. These differences in composition may also imply a differential functional diversity.
Trophic biomarkers (stable isotopes, fatty acids) were used to identify the major sources of organic matter contributing to the copepods diet and hence to gain insight in the overall carbon flux. Harpacticoid copepods showed preferences to feed upon the epiphytal biofilm community composed of bacteria, diatoms, fungi and microalgae. Copepods used the seagrass and detritus material merely as substrate, but were attracted to the biofilm rather than the plant material which is rich in structural carbohydrates difficult to assimilate by animals (i.e. lignin, cellulose, ...).
Since harpacticoid copepods showed to use different sources of carbon, unravelling the contribution of each of them and the role of the degradation level of the detritus for food selectivity is the next step forward.
|Centre Interfacultaire de Recherches en Océanologie - MARE|
|Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS|
|Implications of Posidonia oceanica litter and its microbial and faunal associated communities in the carbon cycle of an coastal oligotrophic area (FRFC 2.4511.09) (2009-2013)|
|File(s) associated to this reference|
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