Sonja Lojen | Jožef Stefan Institute (original) (raw)
Papers by Sonja Lojen
Journal of the Marine Biological Association of the United Kingdom, Aug 24, 2017
The presence of potentially toxic elements (PTE) was determined in different tissues of five sele... more The presence of potentially toxic elements (PTE) was determined in different tissues of five selected marine organisms. The As, Cd, Cu, Mn, Mo, Ni, Pb and Zn concentrations were measured in the seagrassCymodocea nodosa, the green algaCladophora echinus, the red algaGelidiella lubrica, the marine topshellPhorcus turbinatusand the littoral crabCarcinus aestuarii, as well as in seawater from Makirina Bay. The levels of As, Cd, Cu, Mn and Zn in the biota were found to exceed those in previously analysed sediments, indicating the bioaccumulation of these PTE. The biota-sediment accumulation factor (BSAF) and concentration factor (CF) varied among different organisms. As regards the five selected species,C. nodosa,C. echinusandG. lubricaproved to be the strongest accumulators of Mn, whileP. turbinatusandC. aestuariishowed a high capacity to accumulate As, Cd, Cu and Zn. These species can be considered as good ecological indicators in the assessment of PTE pollution in marine littoral environments.
Monitoring of isotope composition of precipitation includes measurements of radioactive isotope t... more Monitoring of isotope composition of precipitation includes measurements of radioactive isotope tritium (3H) and stable isotopes (2H, 18O) in monthly precipitation samples. Isotope composition of precipitation at Zagreb (Croatia) and Ljubljana (Slovenia) have been performed for more than 20 years within the Global Network for Isotopes in Precipitation (GNIP). Within the IAEA CRP "Isotopic composition of precipitation in the Mediterranean Basin in relation to air circulation patterns and climate" the network has been extended since September 2000 to several stations along the Adriatic coast. Here we present tritium activity and stable isotope content in monthly precipitation samples at the mentioned stations, together with the corresponding meteorological data: precipitation amount and mean monthly temperature.
Monitoring of isotope composition of precipitation includes measurements of radioactive isotope t... more Monitoring of isotope composition of precipitation includes measurements of radioactive isotope tritium (3H) and stable isotopes (2H, 18O) in monthly precipitation samples. Isotope composition of precipitation at Zagreb (Croatia) and Ljubljana (Slovenia) have been performed for more than 20 years within the Global Network for Isotopes in Precipitation (GNIP). Within the IAEA CRP "Isotopic composition of precipitation in the Mediterranean Basin in relation to air circulation patterns and climate" the network has been extended since September 2000 to several stations along the Adriatic coast. Here we present tritium activity and stable isotope content in monthly precipitation samples at the mentioned stations, together with the corresponding meteorological data: precipitation amount and mean monthly temperature.
Geologica Macedonica, Dec 29, 2014
Journal of Food Composition and Analysis, Aug 1, 2018
Food Control, Jul 1, 2018
Acta Chimica Slovenica, 2006
Geotemas ( Madrid ), 2012
EGU General Assembly Conference Abstracts, Apr 1, 2018
The stable isotopes of carbon were used to investigate the source of sedimentary organic matter i... more The stable isotopes of carbon were used to investigate the source of sedimentary organic matter in the sediment (peloid mud) from Makirina Bay in the central Adriatic (Croatia). The stable carbon isotope composition (a13C) of sedimentary organic matter in the surficial sediment, as well as of aquatic plants from the Bay of Makirina and of terrestrial plants from the coastal area was determined. Using the differences in a13C values between marine and terrestrial organic matter and considering that the phytoplankton is relatively unimportant, the origin of sedimentary organic matter in surficial sediment was estimated. For determination of marine and terrestrial contributions to sedimentary organic matter a simple mixing ranges from 4-69%. The terrigenous fraction is much higher (30-69%) in the southern and coastal part of Makirina Bay and indicates the prevailing influence of terrestrial organic matter. In the central part of the bay aquatic plants are probably of great importance and the percentage of terrigenous fraction is much lower (4-30%).
Journal of the Marine Biological Association of the United Kingdom, Aug 24, 2017
The presence of potentially toxic elements (PTE) was determined in different tissues of five sele... more The presence of potentially toxic elements (PTE) was determined in different tissues of five selected marine organisms. The As, Cd, Cu, Mn, Mo, Ni, Pb and Zn concentrations were measured in the seagrassCymodocea nodosa, the green algaCladophora echinus, the red algaGelidiella lubrica, the marine topshellPhorcus turbinatusand the littoral crabCarcinus aestuarii, as well as in seawater from Makirina Bay. The levels of As, Cd, Cu, Mn and Zn in the biota were found to exceed those in previously analysed sediments, indicating the bioaccumulation of these PTE. The biota-sediment accumulation factor (BSAF) and concentration factor (CF) varied among different organisms. As regards the five selected species,C. nodosa,C. echinusandG. lubricaproved to be the strongest accumulators of Mn, whileP. turbinatusandC. aestuariishowed a high capacity to accumulate As, Cd, Cu and Zn. These species can be considered as good ecological indicators in the assessment of PTE pollution in marine littoral environments.
Monitoring of isotope composition of precipitation includes measurements of radioactive isotope t... more Monitoring of isotope composition of precipitation includes measurements of radioactive isotope tritium (3H) and stable isotopes (2H, 18O) in monthly precipitation samples. Isotope composition of precipitation at Zagreb (Croatia) and Ljubljana (Slovenia) have been performed for more than 20 years within the Global Network for Isotopes in Precipitation (GNIP). Within the IAEA CRP "Isotopic composition of precipitation in the Mediterranean Basin in relation to air circulation patterns and climate" the network has been extended since September 2000 to several stations along the Adriatic coast. Here we present tritium activity and stable isotope content in monthly precipitation samples at the mentioned stations, together with the corresponding meteorological data: precipitation amount and mean monthly temperature.
Monitoring of isotope composition of precipitation includes measurements of radioactive isotope t... more Monitoring of isotope composition of precipitation includes measurements of radioactive isotope tritium (3H) and stable isotopes (2H, 18O) in monthly precipitation samples. Isotope composition of precipitation at Zagreb (Croatia) and Ljubljana (Slovenia) have been performed for more than 20 years within the Global Network for Isotopes in Precipitation (GNIP). Within the IAEA CRP "Isotopic composition of precipitation in the Mediterranean Basin in relation to air circulation patterns and climate" the network has been extended since September 2000 to several stations along the Adriatic coast. Here we present tritium activity and stable isotope content in monthly precipitation samples at the mentioned stations, together with the corresponding meteorological data: precipitation amount and mean monthly temperature.
Geologica Macedonica, Dec 29, 2014
Journal of Food Composition and Analysis, Aug 1, 2018
Food Control, Jul 1, 2018
Acta Chimica Slovenica, 2006
Geotemas ( Madrid ), 2012
EGU General Assembly Conference Abstracts, Apr 1, 2018
The stable isotopes of carbon were used to investigate the source of sedimentary organic matter i... more The stable isotopes of carbon were used to investigate the source of sedimentary organic matter in the sediment (peloid mud) from Makirina Bay in the central Adriatic (Croatia). The stable carbon isotope composition (a13C) of sedimentary organic matter in the surficial sediment, as well as of aquatic plants from the Bay of Makirina and of terrestrial plants from the coastal area was determined. Using the differences in a13C values between marine and terrestrial organic matter and considering that the phytoplankton is relatively unimportant, the origin of sedimentary organic matter in surficial sediment was estimated. For determination of marine and terrestrial contributions to sedimentary organic matter a simple mixing ranges from 4-69%. The terrigenous fraction is much higher (30-69%) in the southern and coastal part of Makirina Bay and indicates the prevailing influence of terrestrial organic matter. In the central part of the bay aquatic plants are probably of great importance and the percentage of terrigenous fraction is much lower (4-30%).