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Assessment of the ecological status of P. oceanica meadow with a no destructive shoot method
Gobert, Sylvie; Lejeune, Pierre; Chéry, Aurélia et al.
20123rd Mediterranean Seagrass Workshop
 

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Keywords :
Seagrass; mediterranean; ecological status; no destructive; PREI
Abstract :
[en] Posidonia oceanica (L.) Delile is a protected species, included in the Red list of marine threatened species of the Mediterranean. Because of its sensitivity to disturbance, P. oceanica is used as a bioindicator to define the health status of coastal waters. Monitoring methods generally require to sample plants, followed by measurements on picked shoots. This implies the total destruction of several tens of shoots. This study presents a method, “The Non Destructive Shoot Methodology”: NDSM, that permits the measurement of (1) the most used seagrass metrics, (2) the determination of C, N, P contents and (3) the measurement of the trace metal levels in P. oceanica leaves. Our technic has been firstly tested by comparison with the results obtained with classic method of biometry. Secondly, differences between levels of C, N, P and trace metals obtained with classic picking and our methodology were tested. Thirdly, the physiological consequences on the shoots were investigated (% of survival, growth, essential element contents (C, N, P, Fe, Cu...). The NDSM gives similar results to classic investigations to assess the ecological status of P. oceanica meadow (i.e. PREI, BiPO...) and avoid the uprooting of the “K-strategist” protected species. This methodology is usable in cases of monitoring and impact studies.
Disciplines :
Aquatic sciences & oceanology
Environmental sciences & ecology
Author, co-author :
Gobert, Sylvie  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanologie
Lejeune, Pierre ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanologie
Chéry, Aurélia;  STARESO sa
Boissery, Pierre;  Agende de l'Eau
Sartoretto, Stéphane;  IFREMER
Andral, Bruno;  IFREMER
Lepoint, Gilles  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanologie
Richir, Jonathan  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanologie
Language :
English
Title :
Assessment of the ecological status of P. oceanica meadow with a no destructive shoot method
Publication date :
29 May 2012
Event name :
3rd Mediterranean Seagrass Workshop
Event organizer :
Ecole supérieure de technologie Essaouira
Event place :
Essaouira, Morocco
Event date :
du 28 mai au 1 juin 2012
Audience :
International
Funders :
ULiège. Patrimoine - Université de Liège. Patrimoine [BE]
Available on ORBi :
since 05 June 2012

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