Details of Organic carbon (OC), total nitrogen (TN), carbon isotope ratio (d13C) in sediments from a coastal lagoon ( Northwestern Adriatic Sea)


Dataset identification

Title of datasetOrganic carbon (OC), total nitrogen (TN), carbon isotope ratio (d13C) in sediments from a coastal lagoon ( Northwestern Adriatic Sea)
Narrative summary of datasetPialassa Baiona is a temperate coastal lagoon connected with the Northwestern Adriatic Sea (44° 280 N and 44°310 E). Sediment cores and surface sediments were collected in two habitats within Pialassa Baiona: a) a salt marsh habitat characterized by the presence of saltmarsh vegetation, and b) a human impacted habitat close to anthropogenic source inputs. Cores were sampled by inserting one cylindrical Plexiglas hand corer (5-cm diameter, 50 cm long) into the sediment to a depth of 20-25 cm, and surface sediment samples (0–5 cm) were collected with a stainless-steel grab sampler. The cores were extruded in the field, sectioned into 1-2 cm intervals, and analyzed for total organic carbon (OC), total nitrogen (TN), carbon isotope ratio (d13C) and dry bulk density (upper 20 – 25 cm) and analyzed for organic carbon (OC), total nitrogen (TN), carbon isotope ratio (d13C) and dry bulk density. Organic carbon (OC), total nitrogen (TN), and carbon isotopes (d13C = [(13C/12C)sample/(13C/12C)standard - 1] × 1,000) were measured in sediment cores and surface sediments using a using a FINNIGAN Delta Plus XP mass spectrometer directly coupled to Thermo Fisher FLASH 2000 CHNS Elemental Analyzer. OC and TN content was expressed as the weight percentage of dried sediment, and carbon isotope results were reported in the standard delta notation with respect to the Vienna Pee Dee Belemnite. A ‘three-end member’ mixing model was used to estimate the relative contribution of the different organic matter (OM) sources: marine phytoplankton (FM), riverine-estuarine phytoplankton (FRE), and C3 saltmarsh plant material (FSM): d13Csample = d13CM x FM + d13CFE x FFE + d13CSM x FSM C/Nsample = C/NM x FM + C/NFE x FFE + C/NSM x FSM 1 = FM + FRE + FSM where FM, FRE and FSM are the relative contributions of marine phytoplankton, riverine-estuarine phytoplankton, and saltmarsh plant material, respectively. d13CM (-18.97‰) and C/NM (4.95), and d13CRE (-30.70‰,) and C/NRE (6.63) represent the end member POC signature recorded during distinct marine and estuarine phytoplankton blooms in the coastal lagoon (Guerra et al., 2013).The C3 saltmarsh plant end-member was selected on the basis of typical d13CSM (-20.2‰) and C/NSM (15.35) values for Juncus spp. (Gebrehiwet et al., 2008; Hughes and Sherr, 1983; J. I. Kelleway et al., 2017; Kemp et al., 2012, 2010; Lamb et al., 2006). References Gebrehiwet, T., Koretsky, C.M., Krishnamurthy, R. V., 2008. Influence of Spartina and Juncus on saltmarsh sediments. III. Organic geochemistry. Chem. Geol. 255, 114–119. Guerra, R., Pistocchi, R., Vanucci, S., 2013. Dynamics and sources of organic carbon in suspended particulate matter and sediments in Pialassa Baiona lagoon (NW Adriatic Sea, Italy). Estuar. Coast. Shelf Sci. 135, 24–32. Kelleway, J.I., Saintilan, N., Macreadie, P.I., Baldock, J.A., Ralph, P.J., 2017. Sediment and carbon deposition vary among vegetation assemblages in a coastal salt marsh. Biogeosciences 14, 3763–3779. Kemp, A.C., Vane, C.H., Horton, B.P., Culver, S.J., 2010. Stable carbon isotopes as potential sea-level indicators in salt marshes, North Carolina, USA. Holocene 20, 623–636. Kemp, A.C., Vane, C.H., Horton, B.P., Engelhart, S.E., Nikitina, D., 2012. Application of stable carbon isotopes for reconstructing salt-marsh floral zones and relative sea level, New Jersey, USA. J. Quat. Sci. 27, 404–414. Important Note: This submission has been initially submitted to SEA scieNtific Open data Edition (SEANOE) publication service and received the recorded DOI. The metadata elements have been further processed (refined) in EMODnet Ingestion Service in order to conform with the Data Submission Service specifications.
Start date2008-04-20
End date2008-07-20

Responsible organisations

Organisation nameIfremer, Scientific Information Systems for the sea
Role of organisationDataset Holding Organisation
Organisation nameSEA scieNtific Open data Edition
Role of organisationPublisher

Dataset availability


Latitude north boundary46.448084
Longitude east boundary20.873009
Latitude south boundary38.93183
Longitude west boundary11.417223
Sea areaMediterranean Region
Mediterranean Sea
Adriatic Sea

Data types, collection and processing

Observation typeinapplicable
ParameterCarbon concentrations in sediment
Nitrogen concentrations in sediment
Stable isotopes in sediment
Instrument typeunconsolidated sediment corers
Data quality processing informationProcessed data

Process information

Submitting organisationIfremer, Scientific Information Systems for the sea
Submission identifier (UUID)a53ad03f-3733-7333-3335-000000073534
Date of dataset creation2020-04-21
Date of dataset revision2022-03-10
Date of metadata creation2022-3-17
Date of metadata latest revision2022-04-13
Date of publishing2022-05-03
Date of processed dataset publication2022-05-10
Processing data centreNational Institute of Oceanography and Applied Geophysics - OGS, Division of Oceanography
Summary record-ID1012