AndreaBozzo/ceres-open-data-index huggingface dataset:
Spatial distribution of the macrobenthic fauna in Laki Lagoon (Evros Delta, N. Aegean Sea)

The dataset contains biotic data from different stations in the Laki lagoon in the Ervos Delta in Southeast Greece. It contains presence/absence data for 15 species at stations in september 1997.
The macrobenthic fauna in the outer part of the Laki lagoon was characterized by a higher diversity and the occurrence of both lagoonal and marine species, and in the innermost part by a higher total abundance and the occurrence of a few lagoonal species. The combination of distance from the sea, depth, salinity and sediment organic matter correlated best with the spatial distribution pattern of the macrofauna.
A number of datarecords are uncertain, and are therefore not included in Eurobis.
Microzooplankton-North Adriatic-Gulf of Trieste, C1-LTER time-series 1986-1990

Regular monitoring of abundance of major taxonomic microzooplankton groups collected at monthly frequency at 0.5, 5, 10 and 15 m depth in the Gulf of Trieste, station C1 (1987-1990). The C1 station, located in the Gulf of Trieste in the northern part of the Adriatic Sea, is part of the Adriatic Long Term Ecological Research (LTER) site.
Happywhale - Walrus in North Atlantic Ocean

Original provider: Happywhale Dataset credits: Happywhale and contributors Abstract: Happywhale.com is a resource to help you know whales as individuals, and to benefit conservation science with rich data about individual whales.
Supplemental information: Sightings and images were submitted to Happywhale by contributors. A portion of the Happywhale data were transferred to OBIS-SEAMAP upon the agreement between Happywhale and OBIS-SEAMAP. There may be duplicate records among Happywhale datasets and other OBIS-SEAMAP datasets. The precision of date/time vary per record. Some records have date accuracy up to year only. This dataset includes sightings and photos from the following 0 contributors in alphabetic order:
Monthly variation in the macrozoobenthic community structure in Laki Lagoon (Evros Delta, N. Aegean Sea)

This dataset data from montly benthos sampling in 1998 at 1 station in the Laki lagoon in the Ervos Delta. The presence of the encoutered taxa was recourded aswel as the depth, watertemperature and sediment grain size.
The macrozoobenthic community structure in the innermost part of Laki lagoon showed a seasonal periodicity. During summer the macrobenthic fauna became impoverished, but recovered from late summer onwards. The seasonal dynamics of the assemblage was mainly governed by water temperature. Predation pressure by  Atherina boyeri  may have contributed to quantitative community changes during autumn.
The sediment samples were taken using a small corer for particle size analysis and estimation of the amount of organic matter. Two samples of epibenthic decapods and small fish were taken using a special net (with a 40·40 cm opening) which was pulled on the sediment for a distance of 10 m)
A number of datarecords are uncertain, and are therefore not included in Eurobis.
The Fishery Grounds near Alexandria.VII.Decapoda.By Heinrich Balss.(1936).Notes and memoirs No. 15

This is a historical dataset that was published in 1936 by H. Balss and concerns of the faunistic report on the Decapoda collected during the floristical and faunistical survey of Adolf Steuer on the coasts near Alexandria mainly with the vessel “El Hoot”.
This dataset covers the time span of 3/9/1933 to 18/11/1933 and contains occurence data of Decapoda in the coasts of Alexandria, Egypt. It also informations about individual counts, sex, lifestage and carapace length. The digitization of this dataset was done by LifewatchGreece team.

Decapoda were found in about 150 sampling stations in the coasts of Alexandria, Egypt.

This dataset is only a part from a large faunistical expedition (http://ipt.medobis.eu/resource?r=egyptexpeditionpreliminaryrepor) that took place in the coasts near Alexandria. The samples were collected by A. Steuer. For bottom samples almost exclusively a dredge with 20x70 cm opening was used. A single catch was made in a depth of 20 m with a large otter trawl in the eastern part of the Bay of Abukir. In general, the motor-launch of the Marine Laboratory "El Hoot" was used for dredging and a rowing boat in shallow water. All excursions were one-day trips. After the expedition, taxonomic identification of the samples was done by specialists. The results of this expedition were published in separate for each taxonomic group volumes. Thus, sampling methods were described in a preliminary report by A. Steuer. Decapod and Scizopod species were identified by H. Balss and Zimmer C. respectively.
Schellenberg A. 1936. The fishery grounds near Alexandria. Amphipoda Benthonica. Notes and memoirs no 18

This is a historical dataset that was published in 1936 by Schellenberg A. and concerns of the faunistic report on the Amphipoda collected during the floristical and faunistical survey of Adolf Steuer on the coasts near Alexandria mainly with the vessel “El Hoot”.
This dataset covers the time span of 29/8/1933 to 18/11/1933 and contains occurrence data of Amphipoda in the coasts of Alexandria, Egypt. It also contains informations about individual counts, sex,lifestage and body length. The digitization of this dataset was done by LifewatchGreece team.

Amphipoda were found in about 45 benthic stations near Alexandria, Egypt, eastern Mediterranean.

This dataset is only a part from a large faunistical expedition (http://ipt.medobis.eu/resource?r=egyptexpeditionpreliminaryrepor) that took place in the coasts near Alexandria. The samples were collected by A. Steuer. For bottom samples almost exclusively a dredge with 20x70 cm opening was used. A single catch was made in a depth of 20 m with a large otter trawl in the eastern part of the Bay of Abukir. In general, the motor-launch of the Marine Laboratory "El Hoot" was used for dredging and a rowing boat in shallow water. All excursions were one-day trips. After the expedition, taxonomic identification of the samples was done by specialists. The results of this expedition were published in separate for each taxonomic group volumes. Thus, sampling methods were described in a preliminary report by A. Steuer. Amphipoda species identification and description were made by Schellenberg A.
Phytoplankton data collected in the Black Sea during the 4th cruise of the R/V "Kiev" in 1995

Phytoplankton data collected in the Black Sea during the 4th cruise of the R/V "Kiev" and processed by Lyudmila Georgieva
Samples were taken by 6 L bathometers at standard depths and at the thermocline layer. The standard sedimentation technique for samples preparation (Usachev, 1926) was used. Samples were preserved by buffered formalin 40% and were settled within 30 days. Then a volume of water was siphoned off and samples were concentrated to 10-20 ml. After thorough mixing the subsamples (0.05 or 0.1 ml) were transferred to the counting chamber. Organisms were counted in two subsamples at ×300-400 magnification.
Phytoplankton data collected in the Black Sea during the 33rd cruise of the R/V "Professor Kolesnikov" in 1995

Phytoplankton data collected in the Black Sea during 33 cruise of the R/V "Professor  Kolesnikov" and processed by Lyudmila Georgieva
Samples were taken with 6 L bathometers at standard depths and in the thermocline layer.  The standard sedimentation technique for samples preparation (Usachev, 1926) was used. Samples were preserved by buffered formalin 40% and were settled within 30 days. Then a volume of water was siphoned off and samples were concentrated to 10-20 ml. After thorough mixing the subsamples (0.05 or 0.1 ml) were transferred to the counting chamber. Organisms were counted in two subsamples at ×300-400 magnification.
Steuer A. 1939. The fishery grounds near Alexandria. XIX Mollusca. Notes and Memoirs No 33

This is a historical dataset that was published in 1939 by Ad. Steuer and concerns of the faunistic report on the Mollusca collected during the floristical and faunistical survey on the coasts near Alexandria mainly with the vessel “El Hoot”.
This dataset covers the time span of 1/4/1933 to 18/11/1933 and contains occurrence data of Molluscs in the coasts of Alexandria, Egypt. For some species, the dataset contains individual counts, sex, life stage and body length. The digitization of this dataset was done by LifewatchGreece team.

Mollusc species were found in about 150 benthic stations in the coasts of Alexandria, Egypt. Some species with pelagic larvae were also found in planktonic stations.

This dataset is only a part from a large expedition that took place in the coasts near Alexandria. The samples were collected by A. Steuer. For bottom samples almost exclusively a dredge with 20x70 cm opening was used. A single catch was made in a depth of 20 m with a large otter trawl in the eastern part of the Bay of Abukir. For plankton samples, vertical hauls were made using medium sized nets with buckets of celluloids with gauze bottom. In general, the motor-launch of the Marine Laboratory "El Hoot" was used for dredging and a rowing boat in shallow water. All excursions were one-day trips. After the expedition, taxonomic identification of the samples was done by specialists. The results of this expedition were published in separate for each taxonomic group volumes. Thus, sampling methods were described in a preliminary report by A. Steuer. Taxonomic identification of mollusc species was made by J.R. Le B. Tomlin, G.H. Crawford and S. Jaeckel.
Subtidal epibenthos and demersal fish monitoring in function of a foreshore suppletion at the Belgian coast, period 2013-2016

What ecological effects does a foreshore suppletion, and a beach suppletion, have on the marine ecosystem in the intertidal and shallow surf zone (-lt;6 m depth)? The foreshore suppletion (400.000m³) was by means of an experimental set-up in the shallow coastal zone (-1 to -2m TAW) of Mariakerke. Beside it, a beach nourishment was conducted at Mariakerke (681243m³) and Middelkerke (968754m³). For the Mariakerke area, we collect biological and sedimentological samples in the impact area and in a control area (Bredene), before as after the suppletion, whereas for Middelkerke only the data after suppletion was part of the study. We monitor the marine ecosystem with a focus on the fauna within the sediment (macrofauna) and on the sediment (hyperbenthos, epi- and demersal fish fauna) in the intertidal zone and subtidal zone.
This dataset contains the epibenthos and demersal fish data collected in the subtidal area. The epibenthic and demersal fish fauna are the biota living on the sea bottom and which are catched with a bottom trawl in this study. The sampling design for the monitoring is following the BACI-design (Before After Control Impact), with a control area with similar habitat characteristics outside the influence of the suppletion activity. There is sampled before the suppletion and in the following two years after suppletion. In this BACI-monitoring, the seasonal aspect is taken into account, by taking samples in spring (March) and autumn (September). In the subtidal area, three depth strata were determined to investigated the influence of the suppletion outside the suppletion area. Stratum a (between low water line and -2m TAW) is the area were the foreshore suppletion is executed. Stratum b and c are taken respectively the depth zones -3m to -4m and -5m to -6m TAW. The amount of sampling locations was determined by the client and contains six tracks for each sampling moment. In each stratum two tracks were taken and the sampling start at the moment of high tide, starting at stratum a. The samples were taken with a 3m beam trawl (22mm mesh size) and a light chain at the bottom of the net. The beam was dragged over the bottom for 15 minutes (1000-1500m). This was done with a constant speed and in line with the currents. The exact distance of the track was determined by calculating the distance between the start- and stop coordinate. The content of the net was worked out immediately by determining and counting the species. The entire catch was handled for determining and counting the fish species, whereas the epifauna was mostly handled by sub-sampling (minimum volume of 2 L). The length of the fish species were measured and the biomass of the epibenthos was based on wet weight measurements. The density and biomass values were standardized to 1000m².
A comparison of benthic biodiversity in the North Sea, English Channel and Celtic Seas - Macroinfauna

Comparison dataset of Animalia in the North Sea, the English Channel and the Celtic Sea.
During April and May 1993, and in February and May 1994, samples of the benthic macrofauna were collected from MAFF research vessels at each of the 25 "intermediate" and "offshore" stations around the England and Wales coastline. One station in the SW Approaches (S48) was sampled in December 1992, i.e. outside the recommended February and May sampling window, but this offshore, deep-water environment was included as a clean-water "reference" point. (An attempt to sample S48 in February 1994 had to be abandoned due to bad weather.) An additional station off the Tees Estuary was sampled to provide information on the shallow coastal environment in this area.

At each location, five sediment samples for macrofauna analysis were collected using a 0.1 m² day grab from the central point of a 500 m grid of 9 stations, the latter being sampled for contaminant analyses only. The five replicates were collected from within a 100 m range ring, using SEXTANT software and DGPS position-fixing.

The depth of sediment in the closed jaws of the grab was determined, as an indication of sample volume. Very small samples (i.e. less than about 5 cm depth) were discarded. A visual description of the sediment type was recorded, together with the location and times at which the sample was collected, and the prevailing sea state, wind strength, and water depth. A small subsample for sediment particle size analysis was removed using a 2 cm diameter perspex corer inserted to a depth of about 5 cm. The contents of the grab were transferred to a hopper, and gently washed over a  1 mm mesh brass sieve. The retained material was preserved for analysis in 5% formaldehyde in seawater with added Rose Bengal.

430 taxa were identified, consisting of 186 polychaetes, 112 crustaceans, 76 molluscs, 19 echinoderms, and 37 in the catergory "other groups".
Phytoplankton data collected in the Black Sea and Bosporus area during a cruise of the R/V "Mgla", year 1968

Phytoplankton data collected in the Black Sea, Bosporus  area during a cruise of the R/V "Mgla", year 1968 and processed by Lyudmila Georgieva.
Samples were taken by 1 L bathometers at standard depths and in the thermocline layer.  The standard sedimentation technique for samples preparation (Usachev, 1926) was used. Samples were preserved by buffered formalin 40% and were settled within 30 days. Then a volume of water was siphoned off and samples were concentrated to 10-20 ml. After thorough mixing the subsamples (0.05 or 0.1 ml) were transferred to the counting chamber. Organisms were counted in two subsamples at ×300-400 magnification.
Broch H. 1935. The fishery grounds near Alexandria. III Cirripeds. Notes et Memoires No 10.

This is a historical dataset that was publlished in 1935 by H. Broch and concerns of the faunistic report on the Cirripeds collected during the floristical and faunistical survey of Adolf Steuer on the coasts near Alexandria mainly with the vessel “El Hoot”.
This dataset covers the time span of 30/8/1933 to 14/11/1933 and contains occurrence data of Cirripeds in the coasts of Alexandria, Egypt. The digitization of this dataset was done by LifewatchGreece team.

This dataset constitutes a small part of an expedition that took place in the coast of Alexandria, Egypt at 1933. Therefore, only 14 sampling stations from a total of almost 170 were described in this dataset.

In this dataset, the occurence of 5 cirriped species were described. Apart from Chelonibia patula, the other 4 species belong to Balanus genus.

This dataset is only a part from a large faunistical expedition (http://ipt.medobis.eu/resource?r=egyptexpeditionpreliminaryrepor)that took place in the coasts near Alexandria. The samples were collected by A. Steuer. For bottom samples almost exclusively a dredge with 20x70 cm opening was used. A single catch was made in a depth of 20 m with a large otter trawl in the eastern part of the Bay of Abukir. In general, the motor-launch of the Marine Laboratory "El Hoot" was used for dredging and a rowing boat in shallow water. All excursions were one-day trips. After the expedition, taxonomic identification of the samples was done by specialists. The results of this expedition were published in separate for each taxonomic group volumes. Thus, sampling methods were described in a preliminary report by A. Steuer.
Steuer Ad., 1939. The fishery grounds near Alexandria. XVIII Sipunculoidea, Phoronidea, Brachiopoda, Enteropneusta and Acrania. Notes and Memoirs No. 30. Fouad I Institute of Hydrobioloy and Fisheries, Egypt

This is a historical dataset that was published in 1939 by Ad. Steuer and concerns of the faunistic report on the Sipunculoidea, Phoronidea, Brachiopoda, Enteropneusta and Acrania collected during the floristical and faunistical survey of Adolf Steuer on the coasts near Alexandria mainly with the vessel “El Hoot”.
This dataset covers the time span of 1/4/1933 to 17/11/1933 and contains occurrence data of Sipunculoidea, Phoronidea, Brachiopoda, Enteropneusta and Acrania in the coasts of Alexandria, Egypt. The digitization of this dataset was done by LifewatchGreece team.

Sipunculoidea, Phoronidea, Brachiopoda, Enteropneusta and Acrania were found in 52 benthic and 5 planktonic sampling station in the coasts near Alexandria, Egypt, eastern Mediterranean.

This dataset is only a part from a large faunistical expedition (http://ipt.medobis.eu/resource?r=egyptexpeditionpreliminaryrepor) that took place in the coasts near Alexandria. The samples were collected by A. Steuer. For bottom samples almost exclusively a dredge with 20x70 cm opening was used. A single catch was made in a depth of 20 m with a large otter trawl in the eastern part of the Bay of Abukir. In general, the motor-launch of the Marine Laboratory "El Hoot" was used for dredging and a rowing boat in shallow water. All excursions were one-day trips. For planktonic samples only medium sized nets with celluloid buckets with gauze bottom were available. After the expedition, taxonomic identification of the samples was done by specialists. The results of this expedition were published in separate for each taxonomic group volumes. Thus, sampling methods were described in a preliminary report by A. Steuer.
Micro litter - Density per net normalized in grams per km² - Other specific protocols 2011/2020 v2023

This visualization product displays the density of floating micro-litter per net normalized in grams per km² per year from specific protocols different from research and monitoring protocols.
EMODnet Chemistry included the collection of marine litter in its 3rd phase. Before 2021, there was no coordinated effort at the regional or European scale for micro-litter. Given this situation, EMODnet Chemistry proposed to adopt the data gathering and data management approach as generally applied for marine data, i.e., populating metadata and data in the CDI Data Discovery and Access service using dedicated SeaDataNet data transport formats. EMODnet Chemistry is currently the official EU collector of micro-litter data from Marine Strategy Framework Directive (MSFD) National Monitoring activities (descriptor 10).
A series of specific standard vocabularies or standard terms related to micro-litter have been added to SeaDataNet NVS (NERC Vocabulary Server) Common Vocabularies to describe the micro-litter.
European micro-litter data are collected by the National Oceanographic Data Centres (NODCs). Micro-litter map products are generated from NODCs data after a test of the aggregated collection including data and data format checks and data harmonization.

A filter is applied to represent only micro-litter sampled according to a very specific protocol such as the Volvo Ocean Race (VOR) or Oceaneye.

Densities were calculated for each net using the following calculation:
Density (weight of particles per km²) = Micro-litter weight / (Sampling effort (km) * Net opening (cm) * 0.00001)

When the weight of microlitters or the net opening was not filled, the density could not be calculated.

Percentiles 50, 75, 95 & 99 have been calculated taking into account data for all years.

Warning: the absence of data on the map doesn't necessarily mean that they don't exist, but that no information has been entered in the National Oceanographic Data Centre (NODC) for this area.
Northeast Atlantic Ocean - DIVA 4D 6-year analysis of Water body phosphate 1960/2020 v2021

Moving 6-year analysis of Phosphate at Atlantic Sea for each season.
    - winter: January-March,
    - spring: April-June,
    - summer: July-September,
    - autumn: October-December
    Every year of the time dimension corresponds to the 6-year centred average of each season. 6-year periods span
    - from 1967-1972 until 2015-2020 (winter),
    - from 1960-1965 until 2015-2020 (spring),
    - from 1968-1973 until 2015-2020 (summer),
    - from 1961-1966 until 2015-2020 (autumn).
    Observational data span from 1960 to 2020. 
    Depth range (IODE standard depths): -2000.0, -1750, -1500.0, -1400.0, -1300.0, -1200.0, -1100.0, -1000.0, -900.0, -800.0, -700.0, -600.0, -500.0, -400.0, -300.0, -250.0, -200.0, -150.0, -125.0, -100.0, -75.0, -50.0,-40.0, -30.0, -20.0, -10.0, -5.0, -0.0
    Data Sources: observational data from SeaDataNet/EMODNet Chemistry Data Network.
    Description of DIVA analysis: Geostatistical data analysis by DIVA (Data-Interpolating Variational Analysis) tool. GEBCO 1min topography is used for the contouring preparation. Analyzed filed masked using relative error threshold 0.3 and 0.5 DIVA settings. Correlation length was optimized and filtered vertically and a seasonally-averaged profile was used. Signal to noise ratio was fixed to 1. Logarithmic transformation applied to the data prior to the analysis. Background field: the data mean value is subtracted from the data. Detrending of data: no, Advection constraint applied: no.
    Units: umol/l
Combined DIVA 4D 6-year analysis of Water body chlorophyll-a 1983-2016 v2018

The analysis was performed per season using DIVA software tool (Data-Interpolating Variational Analysis). The analyses products are stored as NetCDF CF files and made available as WMS layers for easy browsing and adding. Every step of the time dimension corresponds to a 6-year moving average from 1983 to 2016. The depth dimension spans from surface to 1000 m, with 21 vertical levels.
The boundaries and overlapping zones between these regions were filtered to avoid any unrealistic spatial discontinuities. This combined water body dissolved oxygen concentration product is masked using the relative error threshold 0.5. Units: µmol/l Created by 'University of Liège, GeoHydrodynamics and Environment Research (ULiège-GHER)'. The data used as input for DIVA have been extracted from the EMODnet Chemistry Download Service: https://emodnet-chemistry.maris.nl/search
Intermediate regional data products: Mediterranean Sea - DIVA 4D 6-year analysis of Water body chlorophyll-a 1990/2017 v2018, Arctic Ocean - DIVA 4D 6-year analysis of Water body chlorophyll-a 1980/2017 v2018, Black Sea - DIVA 4D 6-year analysis of Water body chlorophyll-a 1990/2016 v2018, North East Atlantic Ocean - DIVA 4D 6-year analysis of Water body chlorophyll-a 1960/2017 v2018, North Sea - DIVA 4D 6-year analysis of Water body chlorophyll-a 1980/2017 v2018, Baltic Sea - DIVA 4D 6-year analysis of Water body chlorophyll-a 1980/2016 v2018