Vegetation persistence and carbon storage: implications for environmental water management for Phragmites australis

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dc.contributor.authorWhitaker, Ken_AU
dc.contributor.authorRogers, Ken_AU
dc.contributor.authorSaintilan, Nen_AU
dc.contributor.authorMazumder, Den_AU
dc.contributor.authorWen, Len_AU
dc.contributor.authorMorrison, RJen_AU
dc.date.accessioned2021-08-26T04:49:01Zen_AU
dc.date.available2021-08-26T04:49:01Zen_AU
dc.date.issued2015-07-14en_AU
dc.date.statistics2021-08-19en_AU
dc.descriptionOpen Accessen_AU
dc.description.abstractEnvironmental water allocations are used to improve the ecological health of wetlands. There is now increasing demand for allocations to improve ecosystem productivity and respiration, and enhance carbon sequestration. Despite global recognition of wetlands as carbon sinks, information regarding carbon dynamics is lacking. This is the first study estimating carbon sequestration for semiarid Phragmites australis reedbeds. The study combined aboveground biomass assessments with stable isotope analyses of soils and modeling of biomass using Normalized Digital Vegetation Index (NDVI) to investigate the capacity of environmental water allocations to improve carbon storage. The study considered relationships between soil organic carbon (SOC), carbon sources, and reedbed persistence in the Macquarie Marshes, a regulated semiarid floodplain of the Murray-Darling Basin, Australia. SOC storage levels to 1 m soil depth were higher in persistent reedbeds (167 Mg ha−1) than ephemeral reedbeds (116–138 Mg ha−1). In situ P. australis was the predominant source of surface SOC at persistent reedbeds; mixed sources of surface SOC were proposed for ephemeral reedbeds. 13C enrichment with increasing soil depth occurred in persistent and ephemeral reedbeds and may not relate to flow characteristics. Despite high SOC at persistent reedbeds, differences in the rate of accretion contributed to significantly higher rates of carbon sequestration at ephemeral reedbeds (approximately 554 and 465 g m−2 yr−1) compared to persistent reedbeds (5.17 g m−2 yr−1). However, under current water regimes, rapid accretion at ephemeral reedbeds cannot be maintained. Effective management of persistent P. australis reedbeds may enhance carbon sequestration in the Macquarie Marshes and floodplain wetlands more generally. © 2015 American Geophysical Unionen_AU
dc.identifier.citationWhitaker, K., Rogers, K., Saintilan, N., Mazumder, D., Wen, L., & Morrison, R. J. (2015). Vegetation persistence and carbon storage: implications for environmental water management for Phragmites australis. Water Resources Research, 51(7), 5284-5300. doi:10.1002/2014WR016253en_AU
dc.identifier.issn1944-7973en_AU
dc.identifier.issue7en_AU
dc.identifier.journaltitleWater Resources Researchen_AU
dc.identifier.pagination5284-5300en_AU
dc.identifier.urihttps://doi.org/10.1002/2014WR016253en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11517en_AU
dc.identifier.volume51en_AU
dc.language.isoenen_AU
dc.publisherAmerican Geophysical Unionen_AU
dc.subjectEnvironmenten_AU
dc.subjectWateren_AU
dc.subjectEcologyen_AU
dc.subjectWetlandsen_AU
dc.subjectCarbonen_AU
dc.subjectCarbon sinksen_AU
dc.subjectReedsen_AU
dc.subjectMarshesen_AU
dc.subjectSedimentary basinsen_AU
dc.titleVegetation persistence and carbon storage: implications for environmental water management for Phragmites australisen_AU
dc.typeJournal Articleen_AU
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