b7c5d984-bae7-4655-b287-c47855d6c197 Vaz Sandrine IFREMER PDG-DGDS-RBE-MARBEC-LHM 04 99 57 32 12 Sandrine.Vaz@ifremer.fr pointOfContact Jade MILLOT IFREMER jade.millot@orange.fr pointOfContact 2026-06-16T09:56:25.989351Z ISO 19115-3 - SEXTANT 1.0 4 1075 0.05 400 0.05 false EPSG:4326 Biomass distribution of megabenthic invertebrates sensitive to bottom trawling and associated uncertainties 2025-10-07 publication https://sextant.ifremer.fr/record/b7c5d984-bae7-4655-b287-c47855d6c197 Two types of products are available for 30 sensitive megabenthic invertebrates : 1- Biomass distribution of the taxa interpolated by kriging across trawlable soft bottoms of the Mediterranean (10–1000 m depth): "[taxa]_bd.tif" 2- Kriging uncertainties associated with each biomass distribution interpolation: "[taxa]_un.tif" ***These layers are associated with the report: Millot Jade, Vaz Sandrine, Lauria Valentina (2026). Sensitivity of megabenthic invertebrate communities to bottom trawling in the Mediterranean based on biological traits. RBE/MARBEC/LHM. https://doi.org/10.13155/117327*** Ifremer Jade Millot Ifremer jade.millot@orange.fr author Vaz Sandrine IFREMER PDG-DGDS-RBE-MARBEC-LHM 04 99 57 32 12 Sandrine.Vaz@ifremer.fr author Sextant IFREMER sextant@ifremer.fr publisher https://sextant.ifremer.fr/geonetwork/srv/api/records/b7c5d984-bae7-4655-b287-c47855d6c197/attachments/Biomass_krig.jpg /Milieu biologique/Habitats Thèmes Sextant 2025-12-09 publication geonetwork.thesaurus.local.theme.sextant-theme Habitats et biotopes GEMET - INSPIRE themes, version 1.0 2018-07-27T14:39:48 publication 2018-07-27 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme CC-BY (Creative Commons - Attribution) We do our best to ensure that the data is complete, accurate and useful. However, because the processing required to generate the data is complex, we cannot be liable for omissions or inaccuracies. The data and any related materials contained therein are provided “as is”, without warranty of any kind, either expressed or implied, including but not limited to, fitness for a particular purpose, non-interference, system integration, or non-infringement. The entire risk of use of the data shall be with the user. 10.17600/96060020 da33d0b4-f208-4a85-bc62-478a2a7fdf68 10.13155/117327 seanoe:104981 grid 0.05 utf8 oceans environment -6.00 37.00 30.00 46.00 2012-01-01 2021-01-01 https://sextant.ifremer.fr/services/wms/redress OGC:WMS Alcyonium_spp_biomass_distribution_MEDITS Alcyonium spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Alcyonium_spp_uncertainties_MEDITS Alcyonium spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Anomia_ephippium_biomass_distribution_MEDITS Anomia ephippium - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Anomia_ephippium_uncertainties_MEDITS Anomia ephippium - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Antedon_spp_biomass_distribution_MEDITS Antedon spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Antedon_spp_uncertainties_MEDITS Antedon spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Ascidia_spp_biomass_distribution_MEDITS Ascidia spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Ascidia_spp_uncertainties_MEDITS Ascidia spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Ascidiella_spp_biomass_distribution_MEDITS Ascidiella spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Ascidiella_spp_uncertainties_MEDITS Ascidiella spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Atrina_spp_biomass_distribution_MEDITS Atrina spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Atrina_spp_uncertainties_MEDITS Atrina spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Axinella_spp_biomass_distribution_MEDITS Axinella spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Axinella_spp_uncertainties_MEDITS Axinella spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Ciona_spp_biomass_distribution_MEDITS Ciona spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Ciona_spp_uncertainties_MEDITS Ciona spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Diazona_violacea_biomass_distribution_MEDITS Diazona violacea - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Diazona_violacea_uncertainties_MEDITS Diazona violacea - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Funiculina_quadrangularis_biomass_distribution_MEDITS Funiculina quadrangularis - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Funiculina_quadrangularis_uncertainties_MEDITS Funiculina quadrangularis - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Gryphus_vitreus_biomass_distribution_MEDITS Gryphus vitreus - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Gryphus_vitreus_uncertainties_MEDITS Gryphus vitreus - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Halocynthia_papillosa_biomass_distribution_MEDITS Halocynthia papillosa - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Halocynthia_papillosa_uncertainties_MEDITS Halocynthia papillosa - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Isidella_elongata_biomass_distribution_MEDITS Isidella elongata - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Isidella_elongata_uncertainties_MEDITS Isidella elongata - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Leptometra_spp_biomass_distribution_MEDITS Leptometra spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Leptometra_spp_uncertainties_MEDITS Leptometra spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Lytocarpia_myriophyllum_biomass_distribution_MEDITS Lytocarpia myriophyllum - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Lytocarpia_myriophyllum_uncertainties_MEDITS Lytocarpia myriophyllum - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Microcosmus_spp_biomass_distribution_MEDITS Microcosmus spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Microcosmus_spp_uncertainties_MEDITS Microcosmus spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Mimachlamys_spp_biomass_distribution_MEDITS Mimachlamys spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Mimachlamys_spp_uncertainties_MEDITS Mimachlamys spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Mytilus_spp_biomass_distribution_MEDITS Mytilus spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Mytilus_spp_uncertainties_MEDITS Mytilus spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Nemertesia_spp_biomass_distribution_MEDITS Nemertesia spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Nemertesia_spp_uncertainties_MEDITS Nemertesia spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Neopycnodonte_cochlear_biomass_distribution_MEDITS Neopycnodonte cochlear - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Neopycnodonte_cochlear_uncertainties_MEDITS Neopycnodonte cochlear - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Ostrea_spp_biomass_distribution_MEDITS Ostrea spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Ostrea_spp_uncertainties_MEDITS Ostrea spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Parastichopus_regalis_biomass_distribution_MEDITS Parastichopus regalis - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Parastichopus_regalis_uncertainties_MEDITS Parastichopus regalis - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Pennatula_spp_biomass_distribution_MEDITS Pennatula spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Pennatula_spp_uncertainties_MEDITS Pennatula spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Phallusia_mammillata_biomass_distribution_MEDITS Phallusia mammillata - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Phallusia_mammillata_uncertainties_MEDITS Phallusia mammillata - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Polycarpa_spp_biomass_distribution_MEDITS Polycarpa spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Polycarpa_spp_uncertainties_MEDITS Polycarpa spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Pteria_hirundo_biomass_distribution_MEDITS Pteria hirundo - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Pteria_hirundo_uncertainties_MEDITS Pteria hirundo - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Pteroeides_griseum_biomass_distribution_MEDITS Pteroeides griseum - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Pteroeides_griseum_uncertainties_MEDITS Pteroeides griseum - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Suberites_spp_biomass_distribution_MEDITS Suberites spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Suberites_spp_uncertainties_MEDITS Suberites spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Tethya_spp_biomass_distribution_MEDITS Tethya spp - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Tethya_spp_uncertainties_MEDITS Tethya spp - Kriging uncertainties https://sextant.ifremer.fr/services/wms/redress OGC:WMS Veretillum_cynomorium_biomass_distribution_MEDITS Veretillum cynomorium - Biomass distribution https://sextant.ifremer.fr/services/wms/redress OGC:WMS Veretillum_cynomorium_uncertainties_MEDITS Veretillum cynomorium - Kriging uncertainties COPYFILE biomass_distribution Biomass distribution of the taxa interpolated by kriging across trawlable soft bottoms of the Mediterranean (10–1000 m depth) COPYFILE kriging_uncertainties Kriging uncertainties associated with each biomass distribution interpolation https://doi.org/10.12770/b7c5d984-bae7-4655-b287-c47855d6c197 DOI Digital Object Identifier (DOI) RÈGLEMENT (UE) N o 1089/2010 DE LA COMMISSION du 23 novembre 2010 portant modalités d'application de la directive 2007/2/CE du Parlement européen et du Conseil en ce qui concerne l'interopérabilité des séries et des services de données géographiques 2010-12-08 publication See the referenced specification false 1- Megabenthic invertebrate taxa collected during the MEDITS survey were scored according to their sensitivity to bottom trawling, based on biological trait assessment informed by expert knowledge (e.g., position in the sediment, mobility, adult size, fragility, feeding mode, and longevity). 2- The 30 taxa with the highest sensitivity scores were selected for further analysis. 3- Biomass data (g/km²) were log-transformed to limit the influence of extreme values. 4- Semi-variogram optimization was performed by testing several combinations of initial parameters, including minimum and maximum separation lag, minimum and maximum separation distance, and stepwise increment. Three models were fitted, and the best model was selected based on three evaluation metrics: highest R², lowest mean absolute error (MAE), and lowest Akaike Information Criterion (AIC). 5- The biomass distributions of the 30 selected taxa were then interpolated using kriging based on the best-fitting semi-variogram model and rasterized to a finer resolution of 0.05°. 6- Kriging uncertainty was assessed by a measure of interpolation error (i.e., kriging variance): the initial resolution of 0.1° was kept for these products. Further details on the data and methods can be found in the associated report.