Temperate coastal wetland near-surface carbon storage: spatial patterns and variability

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dc.contributor.authorOwers, CJen_AU
dc.contributor.authorRogers, Ken_AU
dc.contributor.authorMazumder, Den_AU
dc.contributor.authorWoodroffe, CDen_AU
dc.date.accessioned2021-08-19T23:34:56Zen_AU
dc.date.available2021-08-19T23:34:56Zen_AU
dc.date.issued2020-04-05en_AU
dc.date.statistics2021-08-16en_AU
dc.description.abstractCarbon mitigation services provided by coastal wetlands are not spatially homogeneous, nevertheless are commonly described on the basis of vegetation distribution within the intertidal zone. Distribution of mangrove and saltmarsh varies in response to frequency of tidal inundation, resulting in environmental gradients in edaphic factors that influence vegetation structure, and subsequently affect sedimentary carbon additions by vegetation and carbon losses by decomposition. Current sampling approaches and reporting do not adequately account for variability of carbon storage within a wetland, and assessments need to capture spatial variation associated with carbon storage to improve estimates of potential carbon mitigation services by natural ecosystems. This study quantifies the variation in near-surface carbon storage (i.e. upper 30 cm) across an intertidal gradient using a stratified sampling approach that recognises vegetation structure. Vegetation distribution and structure, as well as sedimentary controls on carbon content, explained variation in carbon storage. Saltmarsh near-surface carbon storage varied considerably between structural form. This was less evident for mangrove structural forms (i.e. tall, shrub, dwarf), which may be due to mangrove roots extending to depths beyond 30 cm. Sedimentary characteristics correlated with carbon content, demonstrating considerable influence on near-surface carbon storage within a wetland. The principal finding of this study was that variation within a wetland corresponds to the variation between sites. Stable carbon isotopes offer a means to identify previous vegetation contributions to sediment, associated with an earlier stage of wetland development, likely reflecting previous environmental conditions. A stratified sampling approach that recognises vegetation structure provides the capacity to account for variability of carbon within a wetland that is inadequately described by current sampling protocols. © 2020 Elsevier B.V.en_AU
dc.identifier.articlenumber106584en_AU
dc.identifier.citationOwers, C. J., Rogers, K., Mazumder, D., & Woodroffe, C. D. (2020). Temperate coastal wetland near-surface carbon storage: spatial patterns and variability. Estuarine, Coastal and Shelf Science, 235, 106584. doi:10.1016/j.ecss.2020.106584en_AU
dc.identifier.issn0272-7714en_AU
dc.identifier.journaltitleEstuarineen_AU
dc.identifier.urihttps://doi.org/10.1016/j.ecss.2020.106584en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11397en_AU
dc.identifier.volume235en_AU
dc.language.isoenen_AU
dc.publisherElsevier B. V.en_AU
dc.subjectMangrovesen_AU
dc.subjectMarshesen_AU
dc.subjectCarbonen_AU
dc.subjectStorageen_AU
dc.subjectPlantsen_AU
dc.subjectStable isotopesen_AU
dc.subjectWetlandsen_AU
dc.subjectSedimentsen_AU
dc.subjectEcosystemsen_AU
dc.titleTemperate coastal wetland near-surface carbon storage: spatial patterns and variabilityen_AU
dc.typeJournal Articleen_AU
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