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dc.creatorSamper Villarreal, Jimena
dc.creatorMumby, Peter J.
dc.creatorSaunders, Megan Irene
dc.creatorBarry, Linda A.
dc.creatorZawadzki, Atun
dc.creatorHeijnis, Hendrik
dc.creatorMorelli, Guia
dc.creatorLovelock, Catherine E.
dc.date.accessioned2020-03-12T15:02:22Z
dc.date.available2020-03-12T15:02:22Z
dc.date.issued2018
dc.identifier.citationhttps://www.sciencedirect.com/science/article/pii/S0272771416304735#!es_ES
dc.identifier.issn0272-7714
dc.identifier.urihttps://hdl.handle.net/10669/80717
dc.description.abstractSeagrass meadows serve as marine carbon sinks, though rates of carbon burial and sediment accretion may vary within and among seagrass meadows due to spatial and temporal variability in sedimentary and biophysical conditions. However, few data are available to evaluate variation in carbon burial over decades to centuries, particularly in subtropical seagrass meadows. Here we assess historical trends in rates of vertical accretion and carbon burial in subtropical seagrass sediments in Moreton Bay, Australia. A total of 19 sediment cores varying in length from 22 to 205 cm were collected from six locations, including two locations where seagrass meadows occurred historically but were lost in recent decades. Cores were dated using 210Pb and 14C. Geochronologies were modelled based on the successful 210Pb dates for two of the locations combined with 14C at five locations. Organic and inorganic carbon content, dry bulk density and stable carbon and nitrogen isotope composition (δ13Corg, δ15N) were measured throughout the cores. Sediments underlying seagrass meadows in Moreton Bay have organic carbon stored up to a depth of at least 2 m which dates to over 7000 yr BP. Across the entire time series, organic carbon burial rates averaged 19 g m−2 yr−1 and inorganic carbon burial rates averaged 27 g m−2 yr−1. Overall mean rates of vertical accretion were estimated to be 0.2 cm yr−1. Rates of vertical accretion accelerated 10-fold following European colonisation which commenced in 1824, from 0.06 ± 0.06 cm yr−1 to 0.66 ± 1.19 cm yr−1. Similarly, rates of organic carbon burial averaged 7.2 ± 5.5 g m−2 yr−1 but then increased 7-fold post-colonisation to 50.5 ± 82.1 g m−2 yr−1. Thus, in Moreton Bay, European settlement and associated land-use change has enhanced sediment accretion and carbon burial in seagrass sediments.es_ES
dc.description.sponsorshipCommonwealth Scientific and Industrial Research Organisation/[]/CSIRO/Australiaes_ES
dc.description.sponsorshipUniversity of Queensland/[]/UQ/Australiaes_ES
dc.description.sponsorshipAustralian Institute of Nuclear Science and Engineering/[]/AINSE/Australiaes_ES
dc.language.isoen_USes_ES
dc.sourceEstuarine, Coastal and Shelf Science, vol.202, pp.40-53es_ES
dc.subjectBlue carbones_ES
dc.subjectCarbon sequestrationes_ES
dc.subjectCarbon stockses_ES
dc.subjectRadiocarbon datinges_ES
dc.subject210Pb datinges_ES
dc.subjectMoreton Bayes_ES
dc.titleVertical accretion and carbon burial rates in subtropical seagrass meadows increased following anthropogenic pressure from European colonisationes_ES
dc.typeartículo científicoes_ES
dc.identifier.doi10.1016/j.ecss.2017.12.006
dc.description.procedenceUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigación en Ciencias del Mar y Limnología (CIMAR)es_ES


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