Biology of Posidonia

Gobert, Sylvie; Cambridge, Marion L.; Velimirov, B.; Pergent, Gérard; Lepoint, Gilles; Bouquegneau, Jean-Marie; Dauby, Patrick; Pergent-Martinì, Christine; Walker, Diana

doi:10.1007/1-4020-2983-7_17

Cited by 60 publications

(75 citation statements)

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“…The stability and turn-over rate of different species of seagrasses has been recognised for a long time, and is most readily exemplified by the deep beds of organic material found in P. oceanica beds in the Mediterranean and of Posidonia australis beds in southern Australia (Gobert et al, 2006;Mateo et al, 2006). Only in the very recent past has attention begun to focus on the reasons for these differences.…”

Section: Differences In C Sink Capacity Among Seagrass Speciesmentioning

confidence: 98%

Quantifying and modelling the carbon sequestration capacity of seagrass meadows – A critical assessment

Macreadie

Baird

Trevathan-Tackett

et al. 2014

Marine Pollution Bulletin

202

121

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Section: Differences In C Sink Capacity Among Seagrass Speciesmentioning

confidence: 98%

Quantifying and modelling the carbon sequestration capacity of seagrass meadows – A critical assessment

Macreadie

Baird

Trevathan-Tackett

et al. 2014

Marine Pollution Bulletin

202

121

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“…is a slow growing horizontal spreader with slow rhizome expansion and colonisation rates (Gobert et al, 2006). For this reason, Posidonia does not generally recover once disturbed (Clarke and Kirkman, 1989) or recovers very slowly (Meehan and West, 2000).…”

Section: Seagrass Speciesmentioning

confidence: 99%

A comparison of the impact of ‘seagrass-friendly’ boat mooring systems on Posidonia australis

Demers

Davis

Knott³

2013

Marine Environmental Research

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Permanent boat moorings have contributed to the decline of seagrasses worldwide, prompting the development of 'seagrass-friendly' moorings. We contrasted seagrass cover and density (predominantly Posidonia australis) in the vicinity of three mooring types and nearby reference areas lacking moorings in Jervis Bay, Australia. We examined two types of 'seagrass-friendly' mooring and a conventional 'swing' mooring. 'Swing' moorings produced significant seagrass scour, denuding patches of ∼9 m radius. Seagrassfriendly 'cyclone' moorings produced extensive denuded patches (average radius of ∼18 m). Seagrass-friendly 'screw' moorings, conversely, had similar seagrass cover to nearby reference areas. Our findings reinforce previous work highlighting the negative effects of 'swing' and 'cyclone' moorings. In contrast, the previously unstudied 'screw' moorings were highly effective. We conclude that regular maintenance of moorings and the monitoring of surrounding seagrass are required to ensure that 'seagrass-friendly' moorings are operating effectively. This is important, as following damage Posidonia will take many decades to recover. AbstractPermanent boat moorings have contributed to the decline of seagrasses worldwide, prompting the development of 'seagrass-friendly' moorings. We contrasted seagrass cover and density (predominantly Posidonia australis) in the vicinity of three mooring types and nearby reference areas lacking moorings in Jervis Bay, Australia. We examined two types of 'seagrass-friendly' mooring and a conventional 'swing' mooring. 'Swing' moorings produced significant seagrass scour, denuding patches of ~9 m radius. Seagrass-friendly 'cyclone' moorings produced extensive denuded patches (average radius of ~18 m). Seagrass-friendly 'screw' moorings, conversely, had similar seagrass cover to nearby reference areas. Our findings reinforce previous work highlighting the negative effects of 'swing' and 'cyclone' moorings. In contrast, the previously unstudied 'screw' moorings were highly effective. We conclude that regular maintenance of moorings and the monitoring of surrounding seagrass are required to ensure that 'seagrass-friendly' moorings are operating effectively. This is important, as following damage Posidonia will take many decades to recover.

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“…Accumulation of the trapped sediment particle results in an elevation of the seabed, leading to corresponding vertical growth of P. oceanica rhizomes Boudouresque and Meinesz, 1982). The complex formed by sediments, living/dead roots and rhizomes is called "matte" Gobert et al, 2006). This structural component, which can be several meters thick (López-Sáez et al, 2009), serves as an important carbon store (Mateo et al, 1997;Pedersen et al, 2011) while its dynamics are strongly linked to the seascape structure of P. oceanica meadows.…”

Section: Available Literature On Posidonia Oceanica Seascape Ecologymentioning

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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Biology of Posidonia

Cited by 60 publications

References 0 publications

Quantifying and modelling the carbon sequestration capacity of seagrass meadows – A critical assessment

Quantifying and modelling the carbon sequestration capacity of seagrass meadows – A critical assessment

A comparison of the impact of ‘seagrass-friendly’ boat mooring systems on Posidonia australis

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

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