Allochthonous and autochthonous contributions to carbon accumulation and carbon accumulation and carbon store in southeastern Australian coastal wetlands

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dc.contributor.authorSaintilan, Nen_AU
dc.contributor.authorRogers, Ken_AU
dc.contributor.authorMazumder, Den_AU
dc.contributor.authorWoodroffe, CDen_AU
dc.date.accessioned2013-12-10T03:02:31Zen_AU
dc.date.available2013-12-10T03:02:31Zen_AU
dc.date.issued2013-08-10en_AU
dc.date.statistics2013-12-10en_AU
dc.description.abstractEstimates of carbon store and carbon accumulation rate in mangrove and saltmarsh are beset by issues of scale and provenance. Estimates at a site do not allow scaling to regional estimates if the drivers of variability are not known. Also, carbon accumulation within soils provides a net offset only if carbon is derived in-situ, or would not otherwise be sequestered. We use a network of observation sites extending across 2000 km of southeastern Australian coastline to determine the influence of geomorphic setting and coastal wetland vegetation type on rates of carbon accumulation, carbon store and probable sources. Carbon accumulation above feldspar marker horizons over a 10-year period was driven primarily by tidal range and position in the tidal frame, and was higher for mangrove and saltmarsh dominated by Juncus kraussii than for other saltmarsh communities. The rate of carbon loss with depth varied between geomorphic settings and was the primary determinant of carbon store. A down-core enrichment in delta C-13 was consistent with an increased relative contribution of mangrove root material to soil carbon, as mangrove roots were found to be consistently enriched compared to leaves. We conclude that while surface carbon accumulation is driven primarily by tidal transport of allocthonous sediment, in-situ carbon sequestration is the dominant source of recalcitrant carbon, and that mangrove and saltmarsh carbon accumulation and store is high in temperate settings, particularly in mesotidal and fluvial geomorphic settings. © 2013, Elsevier Ltd.en_AU
dc.identifier.citationSaintilan, N., Rogers, K., Mazumder, D., & Woodroffe, C. (2013). Allochthonous and autochthonous contributions to carbon accumulation and carbon accumulation and carbon store in southeastern Australian coastal wetlands. Estuarine, Coastal and Shelf Science, 128, 84-92. doi:10.1016/j.ecss.2013.05.010en_AU
dc.identifier.govdoc5274en_AU
dc.identifier.issn0272-7714en_AU
dc.identifier.journaltitleEstuarine, Coastal and Shelf Scienceen_AU
dc.identifier.pagination84-92en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.ecss.2013.05.010en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5077en_AU
dc.identifier.volume128en_AU
dc.language.isoenen_AU
dc.publisherEstuarine, Coastal and Shelf Science, 128, 84-92en_AU
dc.subjectMangrovesen_AU
dc.subjectSedimentsen_AU
dc.subjectCarbonen_AU
dc.subjectPlantsen_AU
dc.subjectProductivityen_AU
dc.subjectHabitaten_AU
dc.titleAllochthonous and autochthonous contributions to carbon accumulation and carbon accumulation and carbon store in southeastern Australian coastal wetlandsen_AU
dc.typeJournal Articleen_AU
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