Phosphorus storages in historically isolated wetland ecosystems and surrounding pasture uplands

Dunne, E. J.; Smith, J.T.; Perkins, D. B.; Clark, Mark W.; Jawitz, James W.; Reddy, K. R.

doi:10.1016/j.ecoleng.2007.05.004

Cited by 40 publications

(36 citation statements)

References 28 publications

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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: 99%

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: 99%

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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“…Dunne et al (2007) reported that restoring 5-20 % of the GIW area in priority basins draining to Lake Okeechobee could increase P storage in GIWs by up to 13 kg P ha -1 , mostly through increased soil organic matter (OM) with its concomitant P in wetland soils. Cheesman et al (2010) found that GIWs stored greater amounts of total phosphorus (TP) than the uplands in which they were bedded (236 vs. 114 kg ha -1 ), mostly in the OM, which is found in greater quantities in GIWs than in upland soils.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus retention of forested and emergent marsh depressional wetlands in differing land uses in Florida, USA

Lane

Autrey

2015

Wetlands Ecol Manage

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The translocation of phosphorus (P) from terrestrial landscapes to aquatic bodies is of concern due to the impact of elevated P on aquatic system functioning and integrity. Due to their common location in depressions within landscapes, wetlands, including socalled geographically isolated wetlands (GIWs), receive and process entrained P. The ability of depressional wetlands, or GIWs, to sequester P may vary by wetland type or by land use modality. In this study we quantified three measures of P sorption capacities for two common GIW types (i.e., emergent marsh and forested wetlands) in two different land use modalities (i.e., agricultural and least impacted land uses) across 55 sites in Florida, USA. The equilibrium P concentration (EPC 0 ) averaged 6.42 ± 5.18 mg P L -1 (standard deviation reported throughout); and ranged from 0.01-27.18 mg P L -1 ; there were no differences between GIW type or land use modality, nor interaction effects. Significant differences in phosphorus buffering capacity (PBC) were found between GIW types and land use, but no interaction effects. Forested GIWs [average 306.64 ± 229.63 (mg P kg -1 ) (lg P L -1 ) -1 ], and GIWs in agricultural settings [average 269.95 ± 236.87 (mg P kg -1 ) (lg P L -1 ) -1 ] had the highest PBC values. The maximum sorption capacity (S max ) was found to only differ by type, with forested wetlands (1274.5 ± 1315.7 mg P kg -1 ) having over three times the capacity of emergent GIWs (417.5 ± 534.6 mg P kg -1 ). Classification trees suggested GIW soil parameters of bulk density, organic content, and concentrations of total P, H 2 O-extractable P, and HCl-extractable P were important to classifying GIW P-sorption metrics. We conclude that GIWs have high potential to retain P, but that the entrained P may be remobilized to the wetland water column depending on storm and groundwater input P concentrations. The relative hydrologic dis-connectivity of GIWs from other aquatic systems may provide sufficient retention time to retain elevated P within these systems, thereby providing an ecosystem service to downstream waters.

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“…Organic matter appears to control total phosphate content of wetland soils and in sediments with high organic matter the total phosphates are stored in the form of organic phosphates ( Dunne et al, 2007). Organic phosphate accumulation is essential for assimilation by the living organisms meanwhile if the phosphate concentration increases it can cause eutrophication.…”

Section: Resultsmentioning

confidence: 99%

Sediment Carbon Storage of Two Main Wetlands in Pondicherry, India

Miria¹,

Khan²

2014

IJSRES

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Abstract. Assessing the carbon storage patterns in the sediments of Oussudu and Kaliveli, considered as potential wetlands for conservation under RAMSAR convention and declared bird sanctuaries by the government was the objective of the study. Dissolved oxygen and CO 2 diffusion rates in the 'surface waters' was analyzed and the relationship between the sediment carbon storage and oxygen/carbon dioxide in the waters was presented. The mean dissolved oxygen content for the study period (2009 -2011) was 17.28 ± 3.25 mg/l for Oussudu and 35.5 ± 7.23 mg/l for Kaliveli respectively. The rate of CO 2 diffusion was high (13.31±2.71 mg/l) in Kaliveli than in Oussudu (6.48±1.21 mg/l). High level of CO 2 diffusion causes acidification forming carbonic acids which might be the cause of high levels of sediment calcium in Kaliveli. The mean calcium carbonate and organic matter content of sediment was 2.11±0.51% and 1.51±0.59% for Oussudu and 36.21±4.51% and 0.46±0.16% for Kaliveli respectively. The total organic carbon and phosphate content were 0.87±0.34% and 27.38±0.56 (mg/L) for Oussudu and 0.27±0.09% and 4.13±0.67 (mg/L) for Kaliveli respectively. There existed a significant inversely proportional relationship between calcium carbonate and organic matter and a strong positive relationship between organic matter and phosphate in the sediments. Our study reveals that majority of the carbon storage is through organic matter in Oussudu lake and through calcium carbonate in Kaliveli.

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Phosphorus storages in historically isolated wetland ecosystems and surrounding pasture uplands

Cited by 40 publications

References 28 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

Phosphorus retention of forested and emergent marsh depressional wetlands in differing land uses in Florida, USA

Sediment Carbon Storage of Two Main Wetlands in Pondicherry, India

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