Comparison of bulk and compound-specific δ13C analyses and determination of carbon sources to salt marsh sediments using n-alkane distributions (Maine, USA)

Tanner, Benjamin R.; Uhle, Maria E.; Mora, Claudia I.; Kelley, Joseph T.; Schuneman, Patrick J.; Lane, Chad S.; Allen, Evan S.

doi:10.1016/j.ecss.2009.11.023

Cited by 45 publications

(25 citation statements)

References 54 publications

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“…The d 13 C org values in the samples ranged from À30.4‰ to À20.3‰ (À25.4 ± 2.0‰ in average). Higher plants with C3 photosynthesis, like P. australis, are reported to result in d 13 C org values between À23‰ to À34‰ (Tanner et al, 2010). Hence, the d 13 C org values found in the LRD are consistent with the fact that P. australis is the dominant plant species in the delta wetlands, and contribute the most to the soil OM.…”

Section: Geochemistry Of Bulk Organic Mattersupporting

confidence: 65%

“…These biomarkers, combined with total organic carbon (TOC), total nitrogen (TN), the soils can provide robust and powerful proxies for the distinguishing of the OM contributions from natural or anthropogenic sources (Wang et al, 2003;Tanner et al, 2010). Several studies have been conducted mainly on the environmental assessments of contaminated soils and sediments in the LRD and Liao River Estuary (Guo et al, 2007;Xu et al, 2009;Wang et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Sources and preservation of organic matter in soils of the wetlands in the Liaohe (Liao River) Delta, North China

Lin

et al. 2013

Marine Pollution Bulletin

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a b s t r a c tTotal organic carbon, total nitrogen, d 13 C org , d 15 N, and aliphatic and polyaromatic hydrocarbons of fiftyfive soil samples collected from the coastal wetlands of the Liaohe Delta were measured, in order to determine the sources and possible preservation of organic matter (OM). The d 15 N and d 13 C org values in the samples ranged from 3.0‰ to 9.4‰ and from À30.4‰ to À20.3‰, respectively, implying that the OM in the soils is predominantly derived from C 3 plant. The long-chain n-alkanes had a strong odd-over-even carbon number predominance, suggesting a significant contribution from waxes of higher plants. The ubiquitous presence of unresolved complex mixture, alkylated polycylic aromatic hydrocarbons and typical biomarkers of petroleum hydrocarbons (pristane, phytane, hopanes and steranes) indicates that there is a contribution of petroleum hydrocarbons to the organic carbon pool in the wetland soils. P. australis-vegetated wetlands have strong potentials for the preservation of organic carbon in the wetlands.

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Section: Geochemistry Of Bulk Organic Mattersupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Sources and preservation of organic matter in soils of the wetlands in the Liaohe (Liao River) Delta, North China

Lin

et al. 2013

Marine Pollution Bulletin

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“…Studies of accretion using feldspar horizons should therefore be used cautiously in assessing contributions from this source to "permanent" carbon of the type required under REDD+ frameworks. Several recent studies have demonstrated the potential of organic markers in clarifying sources of carbon in coastal sedimentary environments (Tanner et al 2010;Wang et al 2011), and the potential of compound-specific isotope analysis has not yet been fully realized in distinguishing between possible carbon sources in these settings.…”

Section: Discussionmentioning

confidence: 99%

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

Saintilan¹,

Rogers²,

Mazumder³

et al. 2013

Estuarine, Coastal and Shelf Science

235

128

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Estimates 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 δ13C 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. 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 δ 13 C 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 ...

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“…Below-and above-ground biomasses are key functional traits that play very important roles in the ecological behavior of cordgrasses. Thus, Spartina biomass influences on the carbon content of marsh sediments (Tanner et al, 2010), the marsh carbon stock (Wieski et al, 2010), marsh methane emissions (Cheng et al, 2010), salt marsh microbial community (First & Hollibaugh, 2010;Lyons et al, 2010), grazing (Burlakova et al, 2009), sediment dynamic (Neumeier & Ciavola, 2004;Salgueiro & Cacador, 2007;Li & Yang, 2009), etc. Cordgrass biomass affects the emergent of the habitat structure, facilitating succession development by providing a base for habitat development (Castellanos et al, 1994;Figueroa et al, 2003;Proffitt et al, 2005;Castillo et al, 2008b).…”

Section: Cordgrass Biomass and Ecosystem Functioningmentioning

confidence: 99%

Cordgrass Biomass in Salt Marshes

Castillo¹,

Rubio-Casal²,

Figueroa³

2010

Biomass

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Comparison of bulk and compound-specific δ13C analyses and determination of carbon sources to salt marsh sediments using n-alkane distributions (Maine, USA)

Cited by 45 publications

References 54 publications

Sources and preservation of organic matter in soils of the wetlands in the Liaohe (Liao River) Delta, North China

Sources and preservation of organic matter in soils of the wetlands in the Liaohe (Liao River) Delta, North China

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

Cordgrass Biomass in Salt Marshes

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