Storage of organic carbon, nitrogen and phosphorus in the soil–plant system of Phragmites australis stands from a eutrophicated Mediterranean salt marsh

González-Alcaraz, María Nazaret; Egea, C.; Jiménez-Cárceles, Francisco J.; Párraga, I.; María-Cervantes, Antonio; Delgado, María José; Álvarez-Rogel, José

doi:10.1016/j.geoderma.2012.03.019

Cited by 61 publications

(27 citation statements)

References 53 publications

(61 reference statements)

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“…It was reported that high primary production could result in high concentrations of particulate OP (Liu et al, 2001;Chai et al, 2006;Yu et al, 2012) and sedimentary OP (Andrieux and Aminot, 1997;Fang, 2000;Dunne et al, 2007;González-Alcaraz et al, 2012;Li et al, 2014;Shao et al, 2014). As a result, relatively high OP concentrations occurred in surface sediments of the northern part of the studied area in spring (Fig.…”

Section: Relationships Between Primary Production and Seasonal Variatmentioning

confidence: 79%

Geochemical forms and seasonal variations of phosphorus in surface sediments of the East China Sea shelf

Zhou

Gao

Yuan

et al. 2016

Journal of Marine Systems

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Geochemical characteristics of phosphorus (P) in the surface sediments of the East China Sea shelf (ECSS) were studied in spring and autumn, 2014. Distributions, seasonal variations, transformations and their influencing factors were discussed. Besides, burial fluxes of P in different seasons were also calculated. Five operationally defined forms of P, namely exchangeable or loosely sorbed P (Ads-P), iron-bound P (Fe-P), authigenic P (Au-P), detrital apatite plus other inorganic P (De-P) and organic P (OP), were obtained using a sequential extraction procedure. Generally, the concentrations of Ads-P, Fe-P, Au-P and OP decreased seaward and the concentrations of De-P increased seaward in both seasons. In spring, the average concentrations of Ads-P, Fe-P, Au-P, De-P and OP were 13.8 ± 5.0, 21.9 ± 7.6, 148.5 ± 44.5, 153.1 ± 55.8 and 91.7 ± 21.5 μg g −1 , respectively. The corresponding concentrations in autumn were 11.4 ± 4.3, 20.0 ± 10.9, 170.4 ± 53.6, 225.6 ± 101.7 and 77.1 ± 33.9 μg g −1 , respectively. The average percentages of P fractions in total P (TP) in spring and autumn were both in the order: De-P N Au-P N OP N Fe-P N Ads-P. The average concentrations of Bio-available P (Bio-P) were 127.4 ± 31.4 μg g −1 in spring and 108.5 ± 47.2 μg g −1 in autumn, accounting for 29.8% ± 7.3% and 21.5% ± 8.2% of corresponding TP, respectively. Seasonal variations of the primary production, hydrodynamic conditions, hypoxia and other environmental conditions were responsible for the seasonal variations of different phosphorus forms. The calculation of burial fluxes reflected that, in most parts of the studied area, TP had relative high burial fluxes in autumn, while Bio-P had relatively high burial fluxes in spring. The burial fluxes of other phosphorus forms also showed different seasonal variations in different parts of the studied area.

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Section: Relationships Between Primary Production and Seasonal Variatmentioning

confidence: 79%

Geochemical forms and seasonal variations of phosphorus in surface sediments of the East China Sea shelf

Zhou

Gao

Yuan

et al. 2016

Journal of Marine Systems

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“…Sediment deposition and plant productivity contribute to vertical marsh accretion41, increasing the C stock in the sediment. Actually, carbon accumulation in the sediment has been shown to increase with belowground biomass production and, on contrary, decrease with organic matter decomposition63842. Therefore, final C stock in the salt marsh sediment depends on the balance between these processes.…”

Section: Discussionmentioning

confidence: 99%

‘Blue Carbon’ and Nutrient Stocks of Salt Marshes at a Temperate Coastal Lagoon (Ria de Aveiro, Portugal)

Sousa

Santos

Silva

et al. 2017

Sci Rep

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Ria de Aveiro is a mesotidal coastal lagoon with one of the largest continuous salt marshes in Europe. The objective of this work was to assess C, N and P stocks of Spartina maritima (low marsh pioneer halophyte) and Juncus maritimus (representative of mid-high marsh halophytes) combined with the contribution of Halimione portulacoides, Sarcocornia perennis, and Bolbochenous maritimus to the lagoon ≈4400 ha marsh area. A multivariate analysis (PCO), taking into account environmental variables and the annual biomass and nutrient dynamics, showed that there are no clear seasonal or spatial differences within low or mid-high marshes, but clearly separates J. maritimus and S. maritima marshes. Calculations of C, N and P stocks in the biomass of the five most representative halophytes plus the respective rhizosediment (25 cm depth), and taking into account their relative coverage, represents 252053 Mg C, 38100 Mg N and 7563 Mg P. Over 90% of the stocks are found within mid-high marshes. This work shows the importance of this lagoon’s salt marshes on climate and nutrients regulation, and defines the current condition concerning the ‘blue carbon’ and nutrient stocks, as a basis for prospective future scenarios of salt marsh degradation or loss, namely under SLR context.

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“…Among the sediment P species, loosely adsorbed P (Lsor‐P) and part of organic P (Org‐P) are easily desorbed and released from sediment to the overlying water, and iron and aluminum‐bound P (Fe/Al‐P) is also released easily in the suboxic environment, while calcium‐bound P (Ca‐P) is relatively stable . Additionally, previous studies showed that sediment P cycling in estuarine and coastal wetland is mainly influenced by P concentrations and species, anthropogenic activities (P input) and sediment physic‐chemical properties …”

Section: Introductionmentioning

confidence: 99%

Reclamation Culture Alters Sediment Phosphorus Speciation and Ecological Risk in Coastal Zone of Southeastern China

Gao

Chen

et al. 2018

CLEAN Soil Air Water

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Sediment phosphorus (P) speciation plays a critical role in coastal wetland ecosystems, while the response of P speciation to reclamation culture remains unclear. In this study, sediment P species (total P [TP], organic P [Org‐P], inorganic P [IP], iron‐ and aluminum‐bound P [Fe/Al‐P], calcium‐bound P [Ca‐P], loosely adsorbed P [Lsor‐P], P sorption index [PSI], and P adsorption saturation [DPS] are investigated in the natural marsh wetland, 3‐year and 15‐year reclamation culture ponds. Sediment P pollution level and eutrophication risk are evaluated based on the single‐factor standard index (Si) and eutrophication risk index (ERI). Furthermore, a simulation experiment is conducted to reveal the effects of baits input and overlying water aeration on sediment P species and ecological risk. Measured sediment TP, Org‐P, IP, Fe/Al‐P, Ca‐P, and Lsor‐P concentrations are significantly higher in 15‐year culture ponds than in 3‐year culture ponds and natural marsh wetland. Sediment PSI is lower in reclamation culture ponds than in natural marsh wetland, while DPS is just opposite. The Si and ERI are higher in 15‐year culture ponds than in natural marsh wetland, suggesting that reclamation culture significantly increases sediment P pollution level and eutrophication risk. A short‐term simulation experiment further indicates that baits input and overlying water aeration can alter sediment P dynamics and increase sediment P loading. Overall, these results confirm that reclamation culture can make more available P accumulation and thus increase eutrophication risk of adjacent coastal water.

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Storage of organic carbon, nitrogen and phosphorus in the soil–plant system of Phragmites australis stands from a eutrophicated Mediterranean salt marsh

Cited by 61 publications

References 53 publications

Geochemical forms and seasonal variations of phosphorus in surface sediments of the East China Sea shelf

Geochemical forms and seasonal variations of phosphorus in surface sediments of the East China Sea shelf

‘Blue Carbon’ and Nutrient Stocks of Salt Marshes at a Temperate Coastal Lagoon (Ria de Aveiro, Portugal)

Reclamation Culture Alters Sediment Phosphorus Speciation and Ecological Risk in Coastal Zone of Southeastern China

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