Nutrient bioavailability of soils and sediments in an Australian estuary influenced by agriculture: linking land to sea

Chaston, Kathy; Moody, P. W.; Dennison, W.C.

doi:10.2495/978-1-84564-091-0/02

Cited by 3 publications

(5 citation statements)

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“…PC1 dataset is explain 36% of the total variance and is strongly positive load with EC, OC%, H%, N%, S%, C/N, and C/H ratio. It indicated high nutrient availability toward the mouth of the estuary by the content of silt and clayey texture of soil (Chaston et al, 2008). All the nutrients availability may have come from various sewage discharges from the metropolitan cities of the river catchment area (Singare et al, PC2 dataset is explain 20% of the variance.…”

Section: Metal Concentration Of Sedimentmentioning

confidence: 99%

Assessment of heavy metal contamination by multivariate statistical methods from the sediment of Ulhas river estuary, Maharashtra, India

Raut¹,

Bharti

Gupta

2022

ECJ

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Ulhas River estuary is one of the most significant estuarine systems situated western coast of India. This estuary has been polluted by several point and nonpoint source and therefore, the multivariate statistical methods were used to determine sediments parameter concentrations, their distributions, and their relationship. In the present study, sediment samples were collected from five different stations and analyzed eight heavy metals' concentrations with seven other parameters. The multivariate statistical methods (PCA, nMDS, and ANOSIM) were used to determine sediments parameter concentrations, their distributions, and their relationship. The PCA results showed that the concentrations of N%, H%, S%, C/N, C/H, EC, and OC% were significant contributors to PC1 (36%) while the heavy metals such as Cu, Pb, Cd, Ni, Si, and Hg concentration were major contributor to PC2 (20%). Both PCs are indicated anthropogenic pollutant deposition towards the mouth of the estuary. Other results of nMDS showed a high degree of similarities within the stations such as 2, 3, and 4. Moreover, analysis of similarities (ANOSIM) results also support them at a significant level of 0.01% with a global R-value (0.6). The observed level of heavy metals contamination in the sediment samples was in the order of Cr >Pb >Cu > Ni >Zn > Hg >Si>Cd. Industrial discharges within the catchment area may be the potential source of sediment pollution and warrants immediate targeted actions to protect this vital ecosystem and its biodiversity.

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Section: Metal Concentration Of Sedimentmentioning

confidence: 99%

Assessment of heavy metal contamination by multivariate statistical methods from the sediment of Ulhas river estuary, Maharashtra, India

Raut¹,

Bharti

Gupta

2022

ECJ

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“…particularly in agricultural areas (Worrall et al, 2012). Several studies from modified catchments demonstrate that nutrient-rich fine particles of terrigenous origin are being transported from catchments and deposited in oceans and coastal bays during floods (Chaston et al, 2008;Garzon-Garcia et al, 2017;Warrick et al, 2005). The majority of flood deposit material is comprised of fine particles due to preferential deposition of the coarser fraction during sediment transport (Kerr et al, 2011;Slattery and Burt, 1997).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Catchment soils supply ammonium to the coastal zone - Flood impacts on nutrient flux in estuaries

O’Mara

Olley

Fry

et al. 2019

Science of The Total Environment

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“…T here have been recent calls for improved understanding of soil conditions in tropical coastal agricultural wetlands for more environmentally sound agronomic management of these valuable ecosystems and better planning of reclamation measures (Chaston et al, 2008;Verhoeven and Setter, 2010). Verhoeven and Setter (2010) suggest that wellmanaged grazing systems with minimal or no fertilizer N and P inputs are potentially one of the more sustainable forms of wetland agriculture in terms of maintaining wetland ecological services.…”

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confidence: 99%

“…Too much P in surface waters can lead to eutrophication, invasive species dominance, and coral reef degradation, with the critical P concentration oft en depending strongly on the degree of fl ushing that occurs within a given aquatic system (Fabricus, 2005;Chaston et al, 2008). Bruland and DeMent (2009) recently conducted the fi rst formal study of P in 40 of Hawaii's coastal wetlands (17 natural, 11 restored, 7 created, 4 fi sh ponds, and 1 agricultural paddy).…”

mentioning

confidence: 99%

“…An understanding of soil P retention dynamics in Hawaii's grazed coastal wetlands is also critical as coastal wetlands may act as sinks or sources of P (Chaston et al, 2008;Bruland and DeMent, 2009). Too much P in surface waters can lead to eutrophication, invasive species dominance, and coral reef degradation, with the critical P concentration oft en depending strongly on the degree of fl ushing that occurs within a given aquatic system (Fabricus, 2005;Chaston et al, 2008).…”

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Macronutrients in Hawaii's Coastal Wetland Pastures and Potential Phosphorus Release to Water

et al. 2011

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Coastal wetland pastures in Hawaii are based on naturalized hilograss (Paspalum conjugatum Bergius) and paragrass [Brachiaria mutica (Forssk.) Stapf] growing primarily on moderately acid (pH 5.4) to mildly alkaline (pH 7.8) and mildly calcareous (<50 g kg−1 CaCO3 equivalent [CCE]) Aquepts and Aquolls. Nutrient concentration, distribution, and P retention dynamics have not been quantified for these ecologically important grazing lands. Soil and forage samples were collected from three pastures at each of six sites, with three sites representing each grass. In addition, pastures at one of the hilograss sites were subjected to zonal sampling with zones determined by distance from shade and drainage ditch borders (animal lounging areas). Soil total N, and exchangeable K and Na accumulated in shaded areas, and forage N, δ15N (‰), and K tended to follow a similar distribution. Across sites hilograss had very high and probably toxic S concentrations (5.6 to 11.0 g kg−1) for cattle (Bos spp.) compared with paragrass, which had S concentrations (1.9 to 4.0 g kg−1) within the expected range for tropical forage grasses. Across sites and the 0‐ to 15‐ and 15‐ to 30‐cm soil depths, satisfactory predictive relationships (n = 54) were obtained between dissolved (<0.45‐μm pore diameter) molybdate‐reactive P (DRP) desorbed from soil in a water extract (DRPWE) and Olsen extractable P (POLSEN) and the oxalate extractable molybdate‐reactive P (RPOX) saturation index (PSIOXRP). Oxalate extractable Al (AlOX) was a more important component of PSIOXRP than oxalate extractable Fe (FeOX), which could be omitted.

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Nutrient bioavailability of soils and sediments in an Australian estuary influenced by agriculture: linking land to sea

Cited by 3 publications

References 46 publications

Assessment of heavy metal contamination by multivariate statistical methods from the sediment of Ulhas river estuary, Maharashtra, India

Assessment of heavy metal contamination by multivariate statistical methods from the sediment of Ulhas river estuary, Maharashtra, India

Catchment soils supply ammonium to the coastal zone - Flood impacts on nutrient flux in estuaries

Macronutrients in Hawaii's Coastal Wetland Pastures and Potential Phosphorus Release to Water

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