Sediment and interstitial water chemistry of the Orbetello lagoon (Grosseto, Italy); nutrient diffusion across the water-sediment interface

Bonanni, P.; Caprioli, Raffaela; Ghiara, E.; Mignuzzi, C.; Orlandi, C.; Paganin, G.; Monti, Angelo

doi:10.1007/978-94-011-2783-7_48

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…4 Relative mineralization of Scirpus maritimus leaves and roots C, N and P (mean value for each block ± SE, n = 3). The Tukey's test showed that the first treatment is significantly different from the others from the sediment mineralization, and these results are in agreement with other studies showing that under anoxic conditions, and due to the organic matter degradation, large quantities of ammonia and phosphate are released from the sediment (Bonanni et al, 1992;Lillebø et al, 2002). In the oxic experiments, nitrate concentrations increased between the days 10-20, yet thought time the ammonification supplied the subsequent nitrification and denitrification, and hence, the mineralized nitrogen was transformed to N 2 and lost.…”

Section: Discussionsupporting

confidence: 91%

The faunal role in the degradation of the common intertidal salt marsh plant Scirpus maritimus

et al. 2007

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The aim of this work was to evaluate the role of different environmental conditions (oxic and anoxic), and the presence of macrofauna and/or meiofauna during the different steps of Scirpus maritimus L. decomposition/mineralization under controlled laboratory conditions. The results showed no significant differences between the anaerobic and the aerobic degradation of plant material, under the presence of bacteria or meiofauna. Nevertheless, under anoxic conditions sediment mineralization was enhanced, with an increase concentration of phosphorus and ammonium in the water phase. Concerning the presence of fauna, results show that, although bacterial activity was responsible for 70% of the S. maritimus leaves degradation, the presence of macrofauna together with meiofauna enhanced the leaves mineralization up to 90%. Moreover, the presence of macrofauna together with meiofauna significantly affected the decomposition of phosphorus and of nitrogen, as well as the leaves lesser labile structural parts, by increasing the mineralization of plant carbon, and raised the nutrient turnover within the system.The present study reinforces the functional link between fauna levels on the nutrient dynamics in salt marshes ecosystems, namely at the vegetation detritus/water column interface.

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Section: Discussionsupporting

confidence: 91%

The faunal role in the degradation of the common intertidal salt marsh plant Scirpus maritimus

et al. 2007

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“…Sediments in shallow coastal waters are known to be important sites for the accumulation of organic matter and the subsequent remineralization and recycling of nutrients (Bonanni et al ., 1992). In contrast to their role as sources, sediments have also been reported to be sinks for nutrients (Alongi, 1994a; Tam & Wong, 1995) and may thus act as nutrient traps (Carman & Wulff, 1989).…”

Section: Introductionmentioning

confidence: 99%

Porewater nutrient profiles and nutrient sediment–water exchange in a tropical mangrove waterway, Mapopwe Creek, Chwaka Bay, Zanzibar

Mohammed

Johnstone

2002

African Journal of Ecology

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Sediments were examined in the Mapopwe Creek, a tidally dominated mangrove waterway in the Chwaka Bay mangrove forest, Zanzibar, to assess their signi¢cance in the nutrient dynamics of the mangrove forest and the adjacent bay. Porewater concentrations of dissolved ammonium and that of soluble reactive phosphorus (SRP) were generally higher during the dry season than during the wet season. NO 3 À plus NO 2 À concentration averaged 1 mm and did not vary much between the two periods. Fluxes of ammonium ranged from À575 to 523 mm m À2 h À1 and those of SRP from À55.7 to 69.5 mm m À2 h À1 . Measurements of NO x did not show any consistent £uxes of this dissolved nitrogen species. Variations of £ux rates between the two seasons were not signi¢cant even though there were small variations in the £ux direction in both nutrients. Results imply that Mapopwe sediments are a source of NH 4 þ but act as a sink for SRP.

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Organic carbon and nutrient (P, N) concentrations of water and sediment in several aquatic environment types of a Mediterranean coastal wetland (Empordà Wetlands, NE Iberian Peninsula)

Gascón

Boix

Sala

et al. 2006

Ann. Limnol. - Int. J. Lim.

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Total sediment and water organic carbon and nutrient (nitrogen and phosphorus) concentrations of different environment types of a Mediterranean coastal wetland (temporary and brackish, temporary and freshwater, semi-permanent and brackish, and permanent and brackish basins) were analysed during two hydroperiods. A nitrogen limitation was found for both sediment and water. The total organic carbon concentration of the water was significantly related to the water level, which varies throughout the hydroperiods. In contrast, the total organic carbon concentration of the sediment was not related to water level. However, significant differences in total organic carbon of the sediment were found between hydroperiods. On the other hand, total organic carbon of the sediment varied spatially, being higher in temporary brackish basins with lower sand content, and lower in permanent and semi-permanent brackish basins with higher sand content.

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Sediment and interstitial water chemistry of the Orbetello lagoon (Grosseto, Italy); nutrient diffusion across the water-sediment interface

Cited by 5 publications

References 13 publications

The faunal role in the degradation of the common intertidal salt marsh plant Scirpus maritimus

The faunal role in the degradation of the common intertidal salt marsh plant Scirpus maritimus

Porewater nutrient profiles and nutrient sediment–water exchange in a tropical mangrove waterway, Mapopwe Creek, Chwaka Bay, Zanzibar

Organic carbon and nutrient (P, N) concentrations of water and sediment in several aquatic environment types of a Mediterranean coastal wetland (Empordà Wetlands, NE Iberian Peninsula)

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