Posidonia oceanica ‘banquettes’: a preliminary assessment of the relevance for meadow carbon and nutrients budget

Mateo, Miguel Ángel; Sánchez-Lizaso, José Luis; Romero, Javier

doi:10.1016/s0272-7714(02)00123-3

Cited by 99 publications

(76 citation statements)

References 12 publications

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“…A nearly balanced NCP at an annual scale as suggested by the DIC incubations would imply that little excess organic carbon is available for export to adjacent coastal environments or for accumulation as extra aboveground or belowground biomass. P. oceanica meadows are known to have high storage rates of organic carbon (e.g., Mateo et al 1997;Gacia et al 2002) and to export large amounts of litter (Mateo et al 2003). At Fanals point (northeast Spain), Gacia et al (2002) reported that 29% of the annual deposition of carbon was derived from P. oceanica detritus and represents about half of the P. oceanica meadow production; in our case that would be about 3 mol C m 22 yr 21 .…”

Section: Discussionmentioning

confidence: 59%

Organic carbon metabolism and carbonate dynamics in a Mediterranean seagrass (Posidonia oceanica), meadow

Barrón

Duarte

Frankignoulle

et al. 2006

Estuaries and Coasts

115

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We measured monthly dissolved oxygen (DO) changes in situ benthic incubations from March 2001 to October 2002 in a Posidonia oceanica meadow and unvegetated sediments of Magalluf Bay (Mallorca Island, Spain) to determine gross primary production (GPP), community respiration (R), and net community production (NCP). From June 2001 to October 2002, we also measured fluxes of dissolved inorganic carbon (DIC) and total alkalinity (TAlk). The yearly integrated metabolic rates based on DO changes show that the P. oceanica communities are net autotrophic while the metabolic rates in the unvegetated benthic communities are nearly balanced. Higher calcium carbonate (CaCO 3 ) cycling, both in terms of production and dissolution, was observed in P. oceanica communities than in unvegetated benthic communities. In the P. oceanica meadow, the annual release of CO 2 from net CaCO 3 production corresponds to almost half of the CO 2 uptake by NCP based on DIC incubations. In unvegetated benthic communities, the annual uptake of CO 2 from net CaCO 3 dissolution almost fully compensates the CO 2 release by NCP based on DIC incubations. CaCO 3 dynamics is potentially a major factor in CO 2 benthic fluxes in seagrass and carbonate-rich temperate coastal ecosystems.

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Section: Discussionmentioning

confidence: 59%

Organic carbon metabolism and carbonate dynamics in a Mediterranean seagrass (Posidonia oceanica), meadow

Barrón

Duarte

Frankignoulle

et al. 2006

Estuaries and Coasts

115

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“…Banquettes are eroded at their bases by waves, resulting in the formation of an arched overhang (Mateo et al, 2003), while they limit sediment loss from a beach, hence reducing coastal erosion (Chessa et al, 2000;De Falco et al, 2008). Banquettes act as temporary sinks of biogenic elements, given that P. oceanica meadows are able to accumulate 50% of their biomass, 71% of their carbon, 27% of their nitrogen and 9% of their phosphorous (Mateo et al, 2003). Slow degradation of beach banquettes releases nutrients that are then available for terrestrial organisms (Guala et al, 2006).…”

Section: Connectivity Of Posidonia Oceanica Meadows With the Mediterrmentioning

confidence: 99%

Seascape ecology in Posidonia oceanica seagrass meadows: Linking structure and ecological processes for management

Abadie

Pace

Gobert

et al. 2018

Ecological Indicators

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A B S T R A C TSeagrass meadows constitute marine habitats in shallow water temperate and tropical coastal areas worldwide that have a high ecological and economic importance. Amongst the 60 or so seagrass species, the endemic Mediterranean species Posidonia oceanica forms meadows that are arguably the most important shallow water coastal habitat in the region but which are subjected to high anthropogenic pressures. Because of the relatively large size of the plant, the meadows formed by this seagrass have high architectural and morphological complexity, which results in different morphotypes or seascapes. While numerous studies of P. oceanica architectural characteristics for continuous meadows of the seagrass are available, few works have addressed seascape ecological features and the influence of environmental factors (natural and anthropogenic) thereon. In the present review, we give an overview of P. oceanica meadow architectural and morphological characteristics and how these contribute to Mediterranean landscapes and seascapes. Studies addressing the influence of natural and anthropogenic factors on morphometric features of different meadow types and landscape ecological characteristics of P. oceanica habitat are also reviewed, as well as their influence on ecosystem processes. Finally, by considering the available data and tools for seascape studies, we present a discussion on methods to assess seagrass seascapes within the framework of coastal management. Our review highlights several gaps in P. oceanica seascape ecology knowledge such as the lack of data on the spatial distribution of this engineer species, and the possibility to use modern techniques and procedures for analysing structural and ecosystemic data.

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“…Sur les zones sableuses, ils forment des accumulations de quelques centimètres à plusieurs mètres d'épaisseur appelées Mediterranean rocky coasts: Features, processes, evolution and problems « banquettes » (BOUDOURESQUE & MEISNESZ, 1982) pouvant s'étendre de l'étage infralittoral à supralittoral (PICARD, 1965). A mesure que la banquette s'épaissit, sa base devient plus compacte, offrant ainsi une protection naturelle contre l'action des vagues et des tempêtes (MATEO et al, 2003). Les banquettes constituent aussi des réservoirs temporaires de carbone, azote et phosphore pour les herbiers de posidonie (MATEO et al, 2003).…”

Section: Introductionunclassified

“…A mesure que la banquette s'épaissit, sa base devient plus compacte, offrant ainsi une protection naturelle contre l'action des vagues et des tempêtes (MATEO et al, 2003). Les banquettes constituent aussi des réservoirs temporaires de carbone, azote et phosphore pour les herbiers de posidonie (MATEO et al, 2003). Longtemps, les banquettes de posidonie ont été prélevées afin de répondre à diverses utilisations comme par exemple la confection de toits ou l'isolation des maisons (BOUDOURESQUE & MEISNESZ, 1982).…”

Section: Introductionunclassified

Les banquettes de Posidonia oceanica : des résidus marins essentiels contre la vulnérabilité des plages

Heurtefeux¹,

Fornasin²,

Fauny³

et al. 2017

Edition 4, Split, Croatie

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Résumé :Les dépôts (feuilles mortes, pelotes…) de Posidonia oceanica qui s'échouent sur les plages, formant ainsi des « banquettes » le long du trait de côte, participent à la construction de l'écosystème plage-dune. Pourtant, de nombreuses collectivités littorales optent pour leur retrait. Celui-ci a lieu en amont de la saison estivale, afin de garantir l'attrait esthétique des plages et optimiser la fréquentation touristique. Le Projet POSBEMED, financé par le programme Interreg-Med, s'intègre dans une volonté de gestion durable des banquettes de posidonie sur l'ensemble du bassin nordméditerranéen. Un travail de terrain a été mené auprès des usagers de la plage afin de comprendre les perceptions, les attentes ainsi que les niveaux de sensibilisation liés au phénomène « banquettes de posidonie ». La gestion des banquettes reflète cependant la contradiction entre les enjeux touristiques des communes et opérateurs privés, et une règlementation stricte du traitement de la posidonie ainsi que son rôle indéniable pour la conservation des plages. Cet article propose une vue synoptique de cette problématique, s'appuyant sur 200 questionnaires effectués sur l'ensemble du littoral de la région PACA ainsi que sur une cartographie des banquettes et un état des lieux des méthodes de gestion actuelles.

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Posidonia oceanica ‘banquettes’: a preliminary assessment of the relevance for meadow carbon and nutrients budget

Cited by 99 publications

References 12 publications

Organic carbon metabolism and carbonate dynamics in a Mediterranean seagrass (Posidonia oceanica), meadow

Organic carbon metabolism and carbonate dynamics in a Mediterranean seagrass (Posidonia oceanica), meadow

Seascape ecology in Posidonia oceanica seagrass meadows: Linking structure and ecological processes for management

Les banquettes de Posidonia oceanica : des résidus marins essentiels contre la vulnérabilité des plages

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