Article (Scientific journals)
From mechanical to chemical impact of anchoring in seagrasses: the premises of anthropogenic patch generation in Posidonia oceanica meadows
Abadie, Arnaud; Lejeune, Pierre; Pergent, Gérard et al.
2016In Marine Pollution Bulletin, 109 (1), p. 61-71
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Keywords :
anchoring; conservation; seagrass; patch; seascape; ancrage; paysage
Abstract :
[en] Intensive anchoring of leisure boats in seagrass meadows leads to mechanical damages. This anthropogenic impact creates bare mat patches that are not easily recolonized by the plant. Several tools are used to study human impacts on the structure of seagrass meadows but they are not able to assess the indirect and long term implication of mechanical destruction. We chose to investigate the possible changes in the substrate chemistry given contrasted boat impacts. Our observations show that hydrogen sulfide concentrations remain high at 15 and 20 m depth (42.6 µM and 18.8 µM) several months after the highest period of anchoring during the summer. Moreover, our multidisciplinary study reveals that anchoring impacts of large boats at 15 and 20 m depth can potentially change the seascape structure. By taking into account both structural and chemical assessments, different managing strategies must be applied for coastal areas under anthropogenic pressures.
Research center :
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Abadie, Arnaud ;  Université de Liège - ULiège > Form.doct. sc. (océanographie - Bologne)
Lejeune, Pierre;  STARESO
Pergent, Gérard;  Université de Corse > UMR SPE 6134 > EqEL
Gobert, Sylvie  ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Language :
English
Title :
From mechanical to chemical impact of anchoring in seagrasses: the premises of anthropogenic patch generation in Posidonia oceanica meadows
Publication date :
2016
Journal title :
Marine Pollution Bulletin
ISSN :
0025-326X
Publisher :
Pergamon, Oxford, United Kingdom
Volume :
109
Issue :
1
Pages :
61-71
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
STARE-CAPMED
Funders :
Collectivity of Corsica [FR]
Agence de l'eau Rhône Méditerranée Corse [FR]
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since 13 June 2016

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