http://gp.sea.gov.ua:8082/ipt/resource?r=zooplankton_abundance_data_during_2018_in_the_bulgarian_black_sea
z2018
Zooplankton abundance data during 2018 in the Bulgarian Black Sea
Kremena
Stefanova
Institute of Oceanology - BAS
Associate Professor
First May Street 40
Varna
Varna
9000
BG
+359897868561
stefanova@io-bas.bg
http://io-bas.bg/
0000-0003-4202-6519
Elitsa
Stefanova
Institute of Oceanology - BAS
Chief Assistant
First May Street 40
Varna
Varna
9000
BG
+359898618773
e.stefanova@io-bas.bg
http://io-bas.bg/
0000-0002-1378-3302
Kremena
Stefanova
Institute of Oceanology - BAS
Associate Professor
First May Street 40
Varna
Varna
9000
BG
+359897868561
stefanova@io-bas.bg
http://io-bas.bg/
0000-0003-4202-6519
Elitsa
Stefanova
Institute of Oceanology - BAS
Chief Assistant
First May Street 40
Varna
Varna
9000
BG
+359898618773
e.stefanova@io-bas.bg
http://io-bas.bg/
0000-0002-1378-3302
Kremena
Stefanova
Institute of Oceanology - BAS
Associate Professor
First May Street 40
Varna
Varna
9000
BG
+359897868561
stefanova@io-bas.bg
http://io-bas.bg/
0000-0003-4202-6519
principalInvestigator
Elitsa
Stefanova
Institute of Oceanology - BAS
Varna
Varna
9000
BG
originator
Asen
Stefanov
Institute of Oceanology - BAS
Varna
Varna
9000
BG
programmer
Ivelin
Petkov
Institute of Oceanology - BAS
Varna
Varna
9000
BG
programmer
2026-04-27
eng
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.
Sampling event
GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type.xml
Sampling event
GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml
marine, harvested by iOBIS
This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC) 4.0 License.
http://bgodc.io-bas.bg/monitoring-black-sea.html
Bulgarian Black Sea area
27.455
28.96
43.716
42.008
2018-03-27
2018-04-03
Mesozooplankton and macrozooplankton
species
Calanus euxinus
species
Pseudocalanus elongatus
subspecies
Paracalanus parvus parvus
species
Acartia (Acartiura) clausii
species
Acartia (Acanthacartia) tonsa
species
Centropages ponticus
species
Oithona davisae
order
Harpacticoida
class
Copepoda
species
Pleopis polyphemoides
class
Polychaeta
class
Bivalvia
class
Gastropoda
subclass
Cirripedia
species
Parasagitta setosa
subphylum
Vertebrata
species
Noctiluca scintillans
species
Aurelia aurita
species
Pleurobrachia pileus
phylum
Ctenophora
phylum
Rotifera
genus
Synchaeta
species
Calanipedia aquaedulcis
species
Oithona similis
species
Oikopleura (Vexillaria) dioica
genus
Acartia
phylum
Nematoda
Bulgaria, as a
member of the European Union, carries out marine ecosystem monitoring under the
Marine Strategy Framework Directive (MSFD), with the aim of achieving Good
Environmental Status (GES). Monitoring of the Bulgarian Black Sea, including
zooplankton, has been conducted under agreements with the Ministry of
Environment and Water (MoEW) during the period 2012–2021. The focus has been on
the development and testing of zooplankton indicators, as well as the
collection of new data. In 2018, a one-month MSFD monitoring program (March-April) was implemented.
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.
irregular
Kremena
Stefanova
Institute of Oceanology - BAS
Associate Professor
First May Street 40
Varna
Varna
9000
BG
+359897868561
stefanova@io-bas.bg
http://io-bas.bg/
0000-0003-4202-6519
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).
Filtered 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.
Species were identified according to Morduhay-Boltovskoy (1968, 1969, 1972) manuals.
Taxonomic nomenclature is according to the on-line data-base of World Register of Marine Species (WoRMS) http://www.marinespecies.org/
Sampling area: Bulgarian Black Sea - stations located on coastal-open sea transects in the Bulgarian Black Sea region, including the EEZ.
Sampling period: March - April 2018
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).
According to Alexandrov et al., 2020
Bulgarian Natonal Monitoring programme for MSFD
Kremena
Stefanova
0000-0003-4202-6519
principalInvestigator
Elitsa
Stefanova
0000-0002-1378-3302
originator
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.
Bulgarian Black Sea - stations located on coastal-open sea transects in the Bulgarian Black Sea region, including the EEZ.
2019-01-07T09:17:50.734+02:00
dataset
Kremena Stefanova and Elitsa Stefanova; Institute of Oceanology, Bulgarian Academy of Sciences (IO-BAS); (2025): Zooplankton abundance data during 2018 in the Bulgarian Black Sea.
http://gp.sea.gov.ua:8082/ipt/resource?id=zooplankton_abundance_data_during_2018_in_the_bulgarian_black_sea/v1.52.xml