f716e480-2686-4a6d-9b16-5cd6e2c63686 Giulio Careddu Università di Roma Sapienza giulio.careddu@uniroma1.it 2025-05-12T14:21:00 ISO 19139 1.0 WGS84 Marine trophic networks in Terra Nova Bay during different ice extent: stable carbon and nitrogen isotopes for determination of trophic interactions affecting biodiversity and heavy metal bioconcentration. 2021-10-01 https://antarcticdatacenter.cnr.it/geonetwork/srv/api/records/fb76df45-1654-46c0-b827-b4252769fe0f Trophic interactions underlie coexistence mechanisms between species and affect biodiversity and heavy metal bioaccumulation processes. Sea ice dynamics, which at Terra Nova Bay is characterized by an extraordinary seasonality, drives interspecific interactions. Indeed, the activation of the primary production after sea-ice break up opens alternative trophic pathways for consumers. By means of C and N stable isotope analyses, the present project aims at (i) determining food web structure at Terra Nova Bay at different bathymetries and in opposite sea-ice cover conditions; (ii) evaluating heavy metal bioaccumulation in species along food chains, including fish of commercial interests, both in the presence and absence of photosynthetic primary producers. The hypothesis to be tested is if the activation of primary producers following sea-ice break up significantly modifies the food web structure and stability against species loss, as well as heavy metals concentration along food chains. Data on Antarctic food webs are scarce, and even scarcer is our knowledge on mechanisms of primary and secondary biodiversity loss and biomagnification processes in invertebrates and fish. The present research project will shed light on mechanisms underlying biodiversity maintenance in the Antarctic ecosystem and on risks for human health related to heavy metals accumulation in fish species currently or potentially exploited commercially, also in light of expected changes in the extension of sea ice cover. A valuable reference baseline will be established for future studies at the Italian Antarctic Station and for the Marine Protected Area in the Ross Sea. Maria Letizia Costantini CoNISMa - Università di Roma Sapienza marialetizia.costantini@uniroma1.it Giulio Careddu Università di Roma Sapienza giulio.careddu@uniroma1.it https://antarcticdatacenter.cnr.it/geonetwork/srv/api/records/f716e480-2686-4a6d-9b16-5cd6e2c63686/attachments/Screenshot%202024-10-22%20alle%2015.32.59.png Inexpressible Island Edmonson Point Tethys Bay Cape Hallett Terra Nova Bay Silverfish Bay SCAR Gazetteer of Antarctica 2021-01-01 geonetwork.thesaurus.external.theme.scar_gazetteer_multi Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2008-01-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme TROPHIC DYNAMICS STABLE ISOTOPES BENTHIC PENGUINS ECOLOGICAL DYNAMICS FOOD-WEB DYNAMICS ANIMALS/INVERTEBRATES FISH MACROFAUNA HEAVY METALS CONCENTRATION GCMD - Science Keywords 2015-01-01 geonetwork.thesaurus.external.theme.gcmd-sciencekeywords PNRA 2015/AZ1.01 PNRA project 2024-03-18 geonetwork.thesaurus.external.theme.PNRAproject CoNISMa - Consorzio Nazionale Interuniversitario per le Scienze del Mare Università di Roma Sapienza Research Organization 2024-03-18 geonetwork.thesaurus.external.theme.Research_Organization IT/PNRA GCMD - Providers 2023-07-24 geonetwork.thesaurus.external.theme.thesaurus Initiative and Programs 2023-10-02 geonetwork.thesaurus.local.theme.InitiativeandPrograms   Creative-Commons CC BY-NC-SA 4.0         XXXII, XXXIII, XXXIV, XXXV 1 164.0158 171.9467 -75.3095 -71.0766 2016-11-10 2019-11-15 FORMATO_DISTRIBUZIONE_DATI (ASCII, CSV, NetCDF...) 1 https://www.pnra.aq/it/project/405/marine-trophic-networks-terra-nova-bay-during-different-ice-extent-stable-carbon-and WWW:LINK-1.0-http--link PNRA project COMMISSION REGULATION (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 This data set is conformant with the INSPIRE Implementing Rules for the interoperability of spatial data sets and services true This dataset contain Isotopic data (Carbon δ13C, and Nitrogen δ15N) and elemental concentrations (C and N) of macroinvertebrates, benthic/sympagic algae and penguin guano samples.