Benthic fluxes of oxygen, carbon and nutrients in the Marano and Grado Lagoon (northern Adriatic Sea, Italy)

Vittor, Cinzia De; Faganeli, Jadran; Emili, Andrea; Covelli, Stefano; Predonzani, Sergio; Acquavita, Alessandro

doi:10.1016/j.ecss.2012.03.031

Cited by 56 publications

(47 citation statements)

References 53 publications

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“…Pore water ammonium, phosphate, and silicic acid concentrations were similar to the values reported in coastal sediment from semi-enclosed areas, such as the Gulf of Finland (Conley et al 1997) and Aburatsubo Bay (Takayanagi and Yamada 1999), and continental shelf areas, such as the Mexican margin (Holcombe et al 2001) and Massachusetts Bay (Hopkinson et al 2001). However, the nutrient concentrations were much higher than those reported in intertidal sediments of the Satilla River Estuary (Jahnke et al 2003), the Seto Inland Sea (Magni and Montani 2006),and the Marano and Grado Lagoons (De Vittor et al 2012), and in estuarine sediments in the Gulf of the St. Lawrence (Thibodeau et al 2010) and the Pearl River Estuary (Zhang et al 2013). The low concentrations in these areas may reflect the fact that the sediment surfaces and overlying water in these areas were oxygenated and received lower inputs of organic matter than our study area.…”

Section: Pore Water Nutrientssupporting

confidence: 76%

Seasonal variations of dissolved organic matter and nutrients in sediment pore water in the inner part of Tokyo Bay

et al. 2016

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Section: Pore Water Nutrientssupporting

confidence: 76%

Seasonal variations of dissolved organic matter and nutrients in sediment pore water in the inner part of Tokyo Bay

et al. 2016

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“…We thank one anonymous reviewer for their constructive comments that have improved the paper. (2000) Tagus Estuary Portugal 18-40 Percuoco et al (2015) Great Bay Estuary USA 50-1400 De Vittor et al (2012) Marano-Grado Lagoon Italy 52-900 Zhang et al (2013) Pearl River Estuary China 64-321 Vidal and Morgui (1995) Alfacs Bay Spain 100-600 Magni et al (2014) Shinkawa-Kasugawa Estuary Japan 200-500 Lohrer et al (2010) Mahurangi Estuary New Zealand 257-1542 Pérez- Villalona et al (2015) San Juan Bay Estuary Puerto Rico 461-572 Cook et al (2004) Huon Estuary Australia 500 Clavero et al (2000) Palmones River Estuary Spain 500-3500 Bally et al (2004) Seine Estuary France 1940 Gonçalves et al (2012) Santos-Cubatao Estuarine System Brazil 2495-4989 This study Application rate 150 g N m −2 Application rate 600 g N m −2 64-10,275 11-18,842…”

Section: Author Contribution Statementmentioning

confidence: 99%

In situ soft sediment nutrient enrichment: A unified approach to eutrophication field experiments

Douglas

Pilditch

Hines

et al. 2016

Marine Pollution Bulletin

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Adding fertiliser to sediments is an established way of studying the effects of eutrophication but a lack of consistent methodology, reporting on enrichment levels, or guidance on application rates precludes rigorous synthesis and meta-analysis. We developed a simple enrichment technique then applied it to 28 sites across an intertidal sandflat. Fertiliser application rates of 150 and 600 g N m −2 resulted in pore water ammonium concentrations respectively 1-110 and 4-580 × ambient, with greater elevations observed in deeper (5-7 cm) than surface (0-2 cm) sediments. These enrichment levels were similar to eutrophic estuaries and were maintained for at least seven weeks. The high between-site variability could be partially explained by the sedimentary environment and macrofaunal community (42%), but only at the high application rate. We suggest future enrichment studies should be conducted in situ across large environmental gradients to incorporate real world complexity and increase generality of conclusions.

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“…This organic material is extremely reactive and induces higher rates of microbial processes, sometimes resulting in eutrophication of the receiving water body. The enhanced microbial activity can lead to a change in sediment status from oxic to hypoxic or even anoxic, and reduces oxygen levels in bottom waters (De Vittor et al 2012). Hypoxia is a global key stressor affecting a huge portion of coastal zones and the persistence of these episodes could result in changes in ecosystem functioning , especially in the increase of nutrient and dissolved organic carbon exchange between sediments and water column (De Vittor et al 2012;Dunn et al 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Establishing the magnitude of benthic exchanges, especially in conditions of hypoxia/anoxia, is important because dissolved oxygen is a key regulator for many biogeochemical cycles, such as sulfur, nitrogen, and heavy metals; therefore, changes in sediment redox status could enhance the release of contaminants (e.g., mercury, iron, sulfur) (Santos-Escheandia et al 2009;Covelli et al 2011;Emili et al 2011;De Vittor et al 2012). Hence, the study of nutrient and carbon fluxes at the SWI is fundamental to define the functionality of coastal ecosystems and to provide indications for managing conservation and development land uses.…”

Section: Introductionmentioning

confidence: 99%

Oxygen, carbon, and nutrient exchanges at the sediment–water interface in the Mar Piccolo of Taranto (Ionian Sea, southern Italy)

Vittor

Relitti

Kralj

et al. 2015

Environ Sci Pollut Res

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In the shallow environment, the nutrient and carbon exchanges at the sediment-water interface contribute significantly to determine the trophic status of the whole water column. The intensity of the allochthonous input in a coastal environment subjected to strong anthropogenic pressures determines an increase in the benthic oxygen demand leading to depressed oxygen levels in the bottom waters. Anoxic conditions resulting from organic enrichment can enhance the exchange of nutrients between sediments and the overlying water. In the present study, carbon and nutrient fluxes at the sediment-water interface were measured at two experimental sites, one highly and one moderately contaminated, as reference point. In situ benthic flux measurements of dissolved species (O2, DIC, DOC, N-NO3 (-), N-NO2 (-), N-NH4 (+), P-PO4 (3-), Si-Si(OH)4, H2S) were conducted using benthic chambers. Furthermore, undisturbed sediment cores were collected for analyses of total and organic C, total N, and biopolymeric carbon (carbohydrates, proteins, and lipids) as well as of dissolved species in porewaters and supernatant in order to calculate the diffusive fluxes. The sediments were characterized by suboxic to anoxic conditions with redox values more negative in the highly contaminated site, which was also characterized by higher biopolymeric carbon content (most of all lipids), lower C/N ratios and generally higher diffusive fluxes, which could result in a higher release of contaminants. A great difference was observed between diffusive and in situ benthic fluxes suggesting the enhancing of fluxes by bioturbation and the occurrence of biogeochemically important processes at the sediment-water interface. The multi-contamination of both inorganic and organic pollutants, in the sediments of the Mar Piccolo of Taranto (declared SIN in 1998), potentially transferable to the water column and to the aquatic trophic chain, is of serious concern for its ecological relevance, also considering the widespread fishing and mussel farming activities in the area.

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Benthic fluxes of oxygen, carbon and nutrients in the Marano and Grado Lagoon (northern Adriatic Sea, Italy)

Cited by 56 publications

References 53 publications

Seasonal variations of dissolved organic matter and nutrients in sediment pore water in the inner part of Tokyo Bay

Seasonal variations of dissolved organic matter and nutrients in sediment pore water in the inner part of Tokyo Bay

In situ soft sediment nutrient enrichment: A unified approach to eutrophication field experiments

Oxygen, carbon, and nutrient exchanges at the sediment–water interface in the Mar Piccolo of Taranto (Ionian Sea, southern Italy)

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