{"key":"0e0779e1-b129-448a-a266-7ef1ca2dcdfe","installationKey":"98b255e0-2073-4e96-9d13-74833fdfa521","publishingOrganizationKey":"3807c6e2-4237-4983-bc1d-93aadfb8e473","doi":"10.15468/k5h7yn","external":false,"numConstituents":0,"type":"SAMPLING_EVENT","shortName":"z2018","title":"Zooplankton abundance data during 2018 in the Bulgarian Black Sea","description":"\n            \n            \n            Zooplankton data, species composition, abundance (ind/m3) collected at stations located on a coastal-open sea transects in the Bulgarian Black Sea region, including the EEZ.\n        \n        \n        ","language":"eng","homepage":"http://bgodc.io-bas.bg/monitoring-black-sea.html","citation":{"text":"Stefanova K, Stefanova E (2026). Zooplankton abundance data during 2018 in the Bulgarian Black Sea. Institute of Oceanology - Bulgarian Academy of Sciences. Sampling event dataset https://doi.org/10.15468/k5h7yn accessed via GBIF.org on 2026-10-11.","citationProvidedBySource":false},"contactsCitation":[{"key":7602019,"abbreviatedName":"Stefanova K","firstName":"Kremena","lastName":"Stefanova","roles":["ORIGINATOR","METADATA_AUTHOR"],"userId":["https://orcid.org/0000-0003-4202-6519"]},{"key":7602020,"abbreviatedName":"Stefanova E","firstName":"Elitsa","lastName":"Stefanova","roles":["ORIGINATOR","METADATA_AUTHOR"],"userId":["https://orcid.org/0000-0002-1378-3302"]}],"lockedForAutoUpdate":false,"createdBy":"3807c6e2-4237-4983-bc1d-93aadfb8e473","modifiedBy":"crawler.gbif.org","created":"2026-09-21T11:11:43.574+00:00","modified":"2026-09-21T11:12:44.703+00:00","contacts":[{"key":7602019,"type":"ORIGINATOR","primary":true,"userId":["https://orcid.org/0000-0003-4202-6519"],"firstName":"Kremena","lastName":"Stefanova","position":["Associate Professor"],"email":["stefanova@io-bas.bg"],"phone":["+359897868561"],"homepage":["http://io-bas.bg/"],"organization":"Institute of Oceanology - BAS","address":["First May Street 40"],"city":"Varna","province":"Varna","country":"BG","postalCode":"9000","createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-09-21T11:12:44.667+00:00","modified":"2026-09-21T11:12:44.667+00:00"},{"key":7602020,"type":"ORIGINATOR","primary":false,"userId":["https://orcid.org/0000-0002-1378-3302"],"firstName":"Elitsa","lastName":"Stefanova","position":["Chief Assistant"],"email":["e.stefanova@io-bas.bg"],"phone":["+359898618773"],"homepage":["http://io-bas.bg/"],"organization":"Institute of Oceanology - BAS","address":["First May Street 40"],"city":"Varna","province":"Varna","country":"BG","postalCode":"9000","createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-09-21T11:12:44.668+00:00","modified":"2026-09-21T11:12:44.668+00:00"},{"key":7602021,"type":"METADATA_AUTHOR","primary":true,"userId":["https://orcid.org/0000-0003-4202-6519"],"firstName":"Kremena","lastName":"Stefanova","position":["Associate Professor"],"email":["stefanova@io-bas.bg"],"phone":["+359897868561"],"homepage":["http://io-bas.bg/"],"organization":"Institute of Oceanology - BAS","address":["First May Street 40"],"city":"Varna","province":"Varna","country":"BG","postalCode":"9000","createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-09-21T11:12:44.669+00:00","modified":"2026-09-21T11:12:44.669+00:00"},{"key":7602022,"type":"METADATA_AUTHOR","primary":false,"userId":["https://orcid.org/0000-0002-1378-3302"],"firstName":"Elitsa","lastName":"Stefanova","position":["Chief Assistant"],"email":["e.stefanova@io-bas.bg"],"phone":["+359898618773"],"homepage":["http://io-bas.bg/"],"organization":"Institute of Oceanology - BAS","address":["First May Street 40"],"city":"Varna","province":"Varna","country":"BG","postalCode":"9000","createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-09-21T11:12:44.671+00:00","modified":"2026-09-21T11:12:44.671+00:00"},{"key":7602023,"type":"PRINCIPAL_INVESTIGATOR","primary":false,"userId":["https://orcid.org/0000-0003-4202-6519"],"firstName":"Kremena","lastName":"Stefanova","position":["Associate Professor"],"email":["stefanova@io-bas.bg"],"phone":["+359897868561"],"homepage":["http://io-bas.bg/"],"organization":"Institute of Oceanology - BAS","address":["First May Street 40"],"city":"Varna","province":"Varna","country":"BG","postalCode":"9000","createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-09-21T11:12:44.671+00:00","modified":"2026-09-21T11:12:44.671+00:00"},{"key":7602024,"type":"ORIGINATOR","primary":false,"userId":[],"firstName":"Elitsa","lastName":"Stefanova","position":[],"email":[],"phone":[],"homepage":[],"organization":"Institute of Oceanology - BAS","address":[],"city":"Varna","province":"Varna","country":"BG","postalCode":"9000","createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-09-21T11:12:44.672+00:00","modified":"2026-09-21T11:12:44.672+00:00"},{"key":7602025,"type":"PROGRAMMER","primary":false,"userId":[],"firstName":"Asen","lastName":"Stefanov","position":[],"email":[],"phone":[],"homepage":[],"organization":"Institute of Oceanology - BAS","address":[],"city":"Varna","province":"Varna","country":"BG","postalCode":"9000","createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-09-21T11:12:44.673+00:00","modified":"2026-09-21T11:12:44.673+00:00"},{"key":7602026,"type":"PROGRAMMER","primary":false,"userId":[],"firstName":"Ivelin","lastName":"Petkov","position":[],"email":[],"phone":[],"homepage":[],"organization":"Institute of Oceanology - BAS","address":[],"city":"Varna","province":"Varna","country":"BG","postalCode":"9000","createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-09-21T11:12:44.674+00:00","modified":"2026-09-21T11:12:44.674+00:00"},{"key":7602027,"type":"ADMINISTRATIVE_POINT_OF_CONTACT","primary":true,"userId":["https://orcid.org/0000-0003-4202-6519"],"firstName":"Kremena","lastName":"Stefanova","position":["Associate Professor"],"email":["stefanova@io-bas.bg"],"phone":["+359897868561"],"homepage":["http://io-bas.bg/"],"organization":"Institute of Oceanology - BAS","address":["First May Street 40"],"city":"Varna","province":"Varna","country":"BG","postalCode":"9000","createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-09-21T11:12:44.675+00:00","modified":"2026-09-21T11:12:44.675+00:00"}],"endpoints":[{"key":1322479,"type":"DWC_ARCHIVE","url":"http://gp.sea.gov.ua:8082/ipt/archive.do?r=zooplankton_abundance_data_during_2018_in_the_bulgarian_black_sea","createdBy":"3807c6e2-4237-4983-bc1d-93aadfb8e473","modifiedBy":"3807c6e2-4237-4983-bc1d-93aadfb8e473","created":"2026-09-21T11:11:43.730+00:00","modified":"2026-09-21T11:11:43.730+00:00","machineTags":[]},{"key":1322478,"type":"EML","url":"http://gp.sea.gov.ua:8082/ipt/eml.do?r=zooplankton_abundance_data_during_2018_in_the_bulgarian_black_sea","createdBy":"3807c6e2-4237-4983-bc1d-93aadfb8e473","modifiedBy":"3807c6e2-4237-4983-bc1d-93aadfb8e473","created":"2026-09-21T11:11:43.695+00:00","modified":"2026-09-21T11:11:43.695+00:00","machineTags":[]}],"machineTags":[{"key":33012373,"namespace":"crawler.gbif.org","name":"crawl_attempt","value":"3","createdBy":"crawler.gbif.org","created":"2026-10-05T00:55:41.654+00:00"}],"tags":[],"identifiers":[{"key":488686,"type":"URL","identifier":"http://gp.sea.gov.ua:8082/ipt/resource?r=zooplankton_abundance_data_during_2018_in_the_bulgarian_black_sea","createdBy":"crawler.gbif.org","created":"2026-09-21T11:12:44.678+00:00","primary":false}],"comments":[],"bibliographicCitations":[],"curatorialUnits":[],"taxonomicCoverages":[{"description":"Mesozooplankton and macrozooplankton","coverages":[{"scientificName":"Calanus euxinus","rank":{"verbatim":"species","interpreted":"SPECIES"}},{"scientificName":"Pseudocalanus elongatus","rank":{"verbatim":"species","interpreted":"SPECIES"}},{"scientificName":"Paracalanus parvus parvus","rank":{"verbatim":"subspecies","interpreted":"SUBSPECIES"}},{"scientificName":"Acartia (Acartiura) clausii","rank":{"verbatim":"species","interpreted":"SPECIES"}},{"scientificName":"Acartia (Acanthacartia) tonsa","rank":{"verbatim":"species","interpreted":"SPECIES"}},{"scientificName":"Centropages ponticus","rank":{"verbatim":"species","interpreted":"SPECIES"}},{"scientificName":"Oithona davisae","rank":{"verbatim":"species","interpreted":"SPECIES"}},{"scientificName":"Harpacticoida","rank":{"verbatim":"order","interpreted":"ORDER"}},{"scientificName":"Copepoda","rank":{"verbatim":"class","interpreted":"CLASS"}},{"scientificName":"Pleopis polyphemoides","rank":{"verbatim":"species","interpreted":"SPECIES"}},{"scientificName":"Polychaeta","rank":{"verbatim":"class","interpreted":"CLASS"}},{"scientificName":"Bivalvia","rank":{"verbatim":"class","interpreted":"CLASS"}},{"scientificName":"Gastropoda","rank":{"verbatim":"class","interpreted":"CLASS"}},{"scientificName":"Cirripedia","rank":{"verbatim":"subclass","interpreted":"SUBCLASS"}},{"scientificName":"Parasagitta setosa","rank":{"verbatim":"species","interpreted":"SPECIES"}},{"scientificName":"Vertebrata","rank":{"verbatim":"subphylum","interpreted":"SUBPHYLUM"}},{"scientificName":"Noctiluca scintillans","rank":{"verbatim":"species","interpreted":"SPECIES"}},{"scientificName":"Aurelia aurita","rank":{"verbatim":"species","interpreted":"SPECIES"}},{"scientificName":"Pleurobrachia pileus","rank":{"verbatim":"species","interpreted":"SPECIES"}},{"scientificName":"Ctenophora","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Rotifera","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Synchaeta","rank":{"verbatim":"genus","interpreted":"GENUS"}},{"scientificName":"Calanipedia aquaedulcis","rank":{"verbatim":"species","interpreted":"SPECIES"}},{"scientificName":"Oithona similis","rank":{"verbatim":"species","interpreted":"SPECIES"}},{"scientificName":"Oikopleura (Vexillaria) dioica","rank":{"verbatim":"species","interpreted":"SPECIES"}},{"scientificName":"Acartia","rank":{"verbatim":"genus","interpreted":"GENUS"}},{"scientificName":"Nematoda","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}}]}],"geographicCoverages":[{"description":"Bulgarian Black Sea area","boundingBox":{"minLatitude":42.008,"maxLatitude":43.716,"minLongitude":27.455,"maxLongitude":28.96,"globalCoverage":false}}],"temporalCoverages":[{"@type":"range","start":"2018-03-27T00:00:00.000+00:00","end":"2018-04-03T00:00:00.000+00:00"}],"keywordCollections":[{"thesaurus":"GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type.xml","keywords":["Sampling event"]},{"thesaurus":"GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml","keywords":["Sampling event"]}],"project":{"title":"Bulgarian Natonal Monitoring  programme for MSFD","identifier":" Agreement between MoEW and IO-BAS for fulfillment of the obligations of IO-BAS, arising under  art. 171, para 2, item 3 of the Water Act (WA) for implementation of the monitoring requirements of  the Water Framework Directive (WFD) and the Marine Strategy Framework Directive (MFSD),  Contract № D-33-36/28.05.2018, MoEW","contacts":[{"type":"PRINCIPAL_INVESTIGATOR","primary":false,"userId":["https://orcid.org/0000-0003-4202-6519"],"firstName":"Kremena","lastName":"Stefanova","position":[],"email":[],"phone":[],"homepage":[],"address":[]},{"type":"ORIGINATOR","primary":false,"userId":["https://orcid.org/0000-0002-1378-3302"],"firstName":"Elitsa","lastName":"Stefanova","position":[],"email":[],"phone":[],"homepage":[],"address":[]}],"funding":"The monitoring program is carried out by the Institute of Oceanology - BAS under agreements with the Ministry of Environment and Water (MoEW) of the Republic of Bulgaria. Funded by MoEW.","awards":[],"studyAreaDescription":"Bulgarian Black Sea - stations located on coastal-open sea transects in the  Bulgarian Black Sea region, including the EEZ.","relatedProjects":[],"abstract":"The zooplankton data is a part of long-term monitoring programs under the Marine Strategy Framework Directive (MSFD)."},"samplingDescription":{"studyExtent":"Sampling area: Bulgarian Black Sea - stations located on coastal-open sea transects in the  Bulgarian Black Sea region, including the EEZ.\nSampling period: March - April 2018","sampling":"Zooplankton samples are collected by vertical plankton Juday net with closing mechanism (0.1 m2 mouth opening area, 150 μm mesh size), from 2 meters above the bottom or oxygen minimum zone to the surface at integral sampling layers or districted layers depending of water stratification and thermocline depth (Alexandrov et al., 2020).","qualityControl":"According to Alexandrov et al., 2020","methodSteps":["The Juday net is hauled vertically with a speed not exceeding 1 m/s (UNESCO, 1968). After taking the net onboard, the content of cod-end is collected. Before zooplankton sample preservation, the gelatinous species (Aurelia aurita, Pleirobrachia pileus, Mnemiopsis leidyi, Beroe ovata) are removed, rinsed, measured and counted on board (Shiganova et al., 2021). The samples are preserved in final 4% formalin solution buffered to pH 8-8.2 with disodiumtetraborate (borax) (Na2B403·10 H20) (Alexandrov et al., 2020).\nFiltered water volume is calculated based on length of tow and area of mouth: V=S·d, where V [m3] is the volume of water filtered by the net, S [m2] is the mouth surface area, and d [m]  is the distance of the tow. In order to save the filtration capacity, after each cruise the net must be washed with detergent in warm fresh water. After storage for at least 20 days in a cool and dark place, in the laboratory the samples are concentrated to 100-150 ml and settled before being divided into sub-samples.  Dimov’s method (1959) is used for quantitative assessment (abundance) and qualitative (taxonomic structure) processing of sub-samples examined by using an Olympus SZ30 Stereoscopic Zoom Microscope. Large scale zooplankters (Calanus euxinus, Chaetognaths, Decapoda larvae, Pisces eggs and larvae, etc.) are counted in the whole sample.\nSpecies were identified according to Morduhay-Boltovskoy (1968, 1969, 1972) manuals.\nTaxonomic nomenclature is according to the on-line data-base of World Register of Marine Species (WoRMS) http://www.marinespecies.org/"]},"countryCoverage":[],"collections":[],"dataDescriptions":[],"dataLanguage":"eng","purpose":"Bulgaria, as a\nmember of the European Union, carries out marine ecosystem monitoring under the\nMarine Strategy Framework Directive (MSFD), with the aim of achieving Good\nEnvironmental Status (GES). Monitoring of the Bulgarian Black Sea, including\nzooplankton, has been conducted under agreements with the Ministry of\nEnvironment and Water (MoEW) during the period 2012–2021. The focus has been on\nthe development and testing of zooplankton indicators, as well as the\ncollection of new data. In 2018, a one-month MSFD monitoring program (March-April) was implemented.","acknowledgements":"<p>The zooplankton data is a part of long-term monitoring programs under the Marine Strategy Framework Directive (MSFD). The monitoring program is carried out by the Institute of Oceanology - BAS under agreements with the Ministry of Environment and Water (MoEW) of the Republic of Bulgaria. Funded by MoEW.</p>","additionalInfo":"marine, harvested by iOBIS","pubDate":"2026-09-21T00:00:00.000+00:00","maintenanceUpdateFrequency":"IRREGULAR","maintenanceDescription":"","license":"http://creativecommons.org/licenses/by-nc/4.0/legalcode","dwca":{"coreType":"http://rs.tdwg.org/dwc/terms/Event","extensions":["http://rs.tdwg.org/dwc/terms/Occurrence","http://rs.iobis.org/obis/terms/ExtendedMeasurementOrFact"],"modified":"2026-09-21T11:12:44.604+00:00"},"approximateCounts":{"occurrenceCount":755}}