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dc.contributor.authorSerrano, O-
dc.contributor.authorLavery, PS-
dc.contributor.authorLópez-Merino, L-
dc.contributor.authorBallesteros, E-
dc.contributor.authorMateo, MA-
dc.identifier.citationFrontiers in Marine Science, 3 ARTN 42, (2016)en_US
dc.description.abstractSeagrasses of the genus Posidonia can form an irregular seascape due to erosional processes exposing thick walls of organic matter-rich soils. However, little is known about the location and characteristics of these particular formations. Here we provide comprehensive estimates of organic carbon (Corg) storage in Posidonia oceanica and Posidonia australis meadows, while providing insight into their location and mechanisms of formation, and highlighting future research directions. Erosional reef escarpments are restricted to shallow highly productive P. oceanica meadows from the Mediterranean Sea and P. australis meadows from the Indian Ocean, and sustain the existence of Corg-rich deposits in surrounding meadows. The thickness of the mat escarpments can reach up to 3 m and their length can vary from few to hundreds of meters. Mechanisms of formation appear to differ among sites, from naturally-induced escarpments by wave action and/or tidal flow to human-induced escarpments by dredging activities. The inter-twined remains of seagrass shoots within the sediment matrix consolidate the sandy substrate and hold the exposed Posidonia mat escarpments together, maintaining a semi-rigid structure. This phenomenon is unusual but of exceptional importance in marine biogeochemical cycles, revealing the largest Corg sinks among seagrasses worldwide (ranging from 15 to 176 kg Corg m−2 in 2 m-thick mats accumulated at 2–249 g Corg m−2 yr−1 over 300–3000 yr).en_US
dc.publisherFrontiers Mediaen_US
dc.subjectEcosystem servicesen_US
dc.subjectBiogeochemical cyclesen_US
dc.subjectBlue carbonen_US
dc.subjectPosidonia oceanicaen_US
dc.subjectPosidonia australisen_US
dc.subjectMediterranean Seaen_US
dc.subjectIndian Oceanen_US
dc.titleLocation and associated carbon storage of erosional escarpments of seagrass Posidonia matsen_US
dc.relation.isPartOfFrontiers in Marine Science-
Appears in Collections:Dept of Life Sciences Research Papers

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