Dimethylsulphoniopropionate (DMSP) in Spartina alterniflora Loisel

Otte, Marinus L.; Morris, James T.

doi:10.1016/0304-3770(94)90018-3

Cited by 66 publications

(70 citation statements)

References 26 publications

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“…These DMSP concentrations were within the range that has been previously reported in healthy Spartina alterniflora (Otte & Morris 1994, Husband & Kiene 2007, Kiehn & Morris 2010. The DMSO concentrations observed here were as much as 2 to 3 times higher than the only other study in which they were measured (leaves: ~0.60 ± 0.20 µmol g −1 FW; stems: ~0.36 ± 0.15 µmol g −1 FW; Husband & Kiene 2007).…”

Section: Dmsp and Dmsosupporting

confidence: 83%

Foliar DMSO:DMSP ratio and metal content as indicators of stress in Spartina alterniflora

McFarlin¹,

Alber²

2013

Mar. Ecol. Prog. Ser.

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We evaluated 2 potential indicators of stress, viz. the ratio of dimethylsulfoxide to dimethylsulfoniopropionate (DMSO:DMSP) and foliar metals, in Spartina alterniflora collected from areas affected by 4 different disturbances (sudden marsh dieback, horse grazing, increased snail densities, wrack deposition) across 20 marshes in Georgia, USA. The DMSO:DMSP ratio was a stronger and more consistent indicator of stress than either DMSP or DMSO concentrations alone, with significantly higher ratios occurring in leaves and stems collected from affected compared to healthy areas in all 4 disturbance types. Foliar metal concentrations also differed in affected compared to healthy areas. Of 20 metals evaluated, concentrations of 19 were increased in leaves collected from edge and affected areas. Multidimensional scaling using the entire suite of metals showed separation between plants from affected and healthy areas, but no difference among disturbance types. In contrast, chlorophyll a concentrations were not significantly different between affected and healthy areas, and did not correlate with variation in either of the 2 indicators. These results suggest that the DMSO:DMSP ratio and foliar metal suite are sensitive indicators of sublethal stress in Spartina, capable of identifying stress before there are visible signs such as chlorophyll loss. The fact that both indicators were consistent across a variety of disturbance types suggests that they may be primarily responsive to general oxidative stress and thus, broadly useful tools for evaluating the health of salt marsh habitat in the field. Spartina alterniflora salt marsh near St. Simons Island, GA, with a dieback area along the edge of the tidal creek.

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Section: Dmsp and Dmsosupporting

confidence: 83%

Foliar DMSO:DMSP ratio and metal content as indicators of stress in Spartina alterniflora

McFarlin¹,

Alber²

2013

Mar. Ecol. Prog. Ser.

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“…These samplers were inserted into the sediment and allowed to equilibrate with the pore water for 1 month. Retrieved samples were analyzed spectrophotometrically for DRP and NH 4 ϩ (Strickland and Parsons 1968), sulfides (Otte and Morris 1994), and Cl Ϫ by coulometric titration. Major cations such as Ca, Mg, K, and Na were measured by ion chromatography on a Dionex DX100.…”

Section: Methodsmentioning

confidence: 99%

Phosphorus sorption characteristics of intertidal marsh sediments along an estuarine salinity gradient

Sundareshwar

Morris

1999

Limnology & Oceanography

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130

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The phosphate sorption capacity of intertidal vegetated marsh sediments was measured along a salinity gradient in the Cooper River estuary, South Carolina. The phosphate sorption capacity of the surface sediments (0-10 cm) of a freshwater marsh was higher than the sorption capacity of sediments from brackish and saline marshes, and surface sediments had greater sorption capacity than subsurface (10-20 cm) sediments. These trends were opposite that of available phosphorus, which increased downstream and with depth. Freshwater marsh sediments trap phosphorus in a less-bioavailable form as evidenced by the low zero equilibrium phosphorus concentration (ZEPC) of the ambient sediment and low exchangeable phosphorus found there. Soil ZEPC values were similar to the in situ mean pore-water phosphate concentrations, which shows that sorption has a major effect on the spatial distribution of pore-water phosphorus along the estuarine salinity gradient. The magnitude of phosphorus sorption by the freshwater marsh sediments greatly reduced the pore-water phosphate concentration, while the phosphorus sorption properties of brackish and salt marsh sediments maintained in situ equilibrium pore-water phosphorus concentrations at surplus levels (with respect to its availability to plants). These differences in P sorption properties of the sediments can be explained on the basis of their physical and chemical characteristics. For instance, approaching the sea, the surface area of sediments declined, with freshwater marsh sediments (0-10 cm) supporting 8.5ϫ higher surface area than the salt marsh sediments. However, the sorption capacity of freshwater sediments was 33ϫ greater than that of salt marsh sediments, which indicates that other properties such as sediment mineral composition are important. The concentrations of important elements such as Al and Fe in sediments also declined downstream. The results suggest that the differences in phosphorus exchange properties among these marshes are a function of sediment type and sedimentary concentrations of Fe and Al. These in turn are related to the changes in ionic strength and associated parameters (e.g., pH) and physical sorting mechanisms.Phosphorus bioavailability (operationally defined here as the molybdate-reactive phosphorus) in wetlands is controlled by complex in situ biotic and abiotic processes. The latter include removal of dissolved phosphate from pore-water through sorption onto sediment particles and organic aggregates. Sorption-desorption processes within a sediment chemical environment are influenced by the mineral composition of the sediment. For example, P sorption is positively correlated with the amount of free iron oxide in acid sulfate soils (Jugsujinda et al. 1995). Furthermore, organic molecules can form complexes with metal ions such as iron (Fe) and aluminum (Al), which in turn can sorb phosphorus and reduce its bioavailability (Jones et al. 1993). This is consistent with the high phosphorus sorption capacity of mineral-rich, freshwater wetland sed...

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“…All sam-ples were appropriately fixed for the different analytes measured (ammonium, sulfate, and sulfide). Porewater sulfate concentrations were measured using an ion chromatograph, while ammonium and sulfide concentrations were measured colorimetrically (Cline 1969, Grasshoff et al 1983, Otte & Morris 1994.…”

Section: A T L a N T I C O C E A N C H E S A P E A K E B A Ymentioning

confidence: 99%

Importance of the fiddler crab Uca pugnax to salt marsh soil organic matter accumulation

Thomas¹,

Blum²

2010

Mar. Ecol. Prog. Ser.

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Dimethylsulphoniopropionate (DMSP) in Spartina alterniflora Loisel

Cited by 66 publications

References 26 publications

Foliar DMSO:DMSP ratio and metal content as indicators of stress in Spartina alterniflora

Foliar DMSO:DMSP ratio and metal content as indicators of stress in Spartina alterniflora

Phosphorus sorption characteristics of intertidal marsh sediments along an estuarine salinity gradient

Importance of the fiddler crab Uca pugnax to salt marsh soil organic matter accumulation

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