This dataset contains oyster mortality records and the main physicochemical parameters monitored in the exposure mesocosms, the tanks holding 60 oysters per treatment (unamended control, dissolved alkalinity addition with NaOH and CaCl2 at +250 or +500 µmol/kg, and olivine-based coastal enhanced silicate weathering at +250 or +500 µmol/kg). Mortality is reported as the number of oysters alive, the interval and cumulative number of oysters found dead, and the relative cumulative mortality (a proportion of the initial 60 individuals per tank). Physicochemical parameters include water temperature, dissolved oxygen, conductivity, salinity, total chlorophyll a, suspended particulate matter and ammonia concentration. Measurements span 17 April to 10 July 2024, covering the alkalinization period and the subsequent 63-day chronic exposure. Water temperature, oxygen and conductivity/salinity were recorded with a multi-probe (Xylem Analytics Germany). Total chlorophyll a was measured by fluorescence on unfiltered seawater with a bbe fluorimeter. Suspended particulate matter was determined gravimetrically from filtered seawater. Ammonia was quantified fluorometrically with a microplate reader assay kit.
Karte aus den Begehungen, Flächenshape 2010 | Weitere Informationen: Erstellt Bioconsult 27.7.2012 | Prüfung: Lageprüfung | Prüfungsbeschreibung: Laden der Daten, prüfen ob die Lage der Objekte plausibel ist | Dateninhalt (Bild): Lageprüfung
Karte aus den Begehungen, Flächenshape 2008 | Weitere Informationen: Erstellt Bioconsult 27.7.2012 | Prüfung: Lageprüfung | Prüfungsbeschreibung: Laden der Daten, prüfen ob die Lage der Objekte plausibel ist | Dateninhalt (Bild): Lageprüfung
In this dataset, we measured oyster growth in response to increased temperature and fish thermal plasticity measured as final - initial weight (wet weight) of individuals in a mesocosm experiment conducted in 2019 at the AWISOM mesocosm facility of the Wadden Sea Station Sylt.
In this dataset, we measured oyster growth in response to increased temperature and fish thermal plasticity measured as final - initial weight (wet weight) of individuals in a mesocosm experiment conducted in 2017 at the AWISOM mesocosm facility of the Wadden Sea Station Sylt.
Video transects were done using the A.IKANBILISTM hovering autonomous underwater vehicle (HAUV) of the company BeeX (https://beex.sg/a-ikanbilis/), which flew over the reefs along predefined transects at a depth of 0.5m above seabed and at a speed of 1 m s-1. From the dive videos of the HAUV, SBIs were extracted every second. Each SBI features two parallel laser lines 30 cm away from each other. The camera used was a GoPro, the videos and pictures were taken perpendicularly to the seabed. The seabed images provide insights into the general composition of key species, higher systematic groups and ecological guilds. The images contain information on how benthic species are associated to each other. Transect files include individual images, whereas metadata of each image includes diving depth, date/time of transect. Geographical coordinates and time of individual images is unavailable, images have a resolution of 300dpi and a size of 9 to 13 MB.
Imagery transects with a camera attached to a frame design for taking pictures in a 50 x 50 cm area. Seabed images transects were carried out by scientific divers during the Heincke HE601 cruise focusing on developing and testing monitoring techniques at the Borkum Reef Ground and Sylt Outer Reef Marine Protected Areas. The camera used was a Canon EOS M6 camera, the pictures were taken perpendicularly to the seabed. The transects were done along a preset track across the reefs, number of pictures per transect varied based on diving time. The seabed images provide insights into the general composition of key species, higher systematic groups and ecological guilds. The images also contain valuable information on how benthic species are associated to each other. Transect files include individual images, whereas metadata of each image including diving depth, date/time, if the image was further analyzed, corresponding diver is found in a separate file. Geographical coordinates of individual images is unavailable.
Imagery transects with a camera attached to a frame design for taking pictures in a 50 x 50 cm area. Seabed images transects were carried out by scientific divers during the RESTORE expedition on board the ship Arctic Ocean during September 2021, focusing on the monitoring of two pilot reefs (east and west) and the ecology of benthic assemblages in the Borkum Reef Ground marine protected area. The camera used was a Cannon EOS M6 camera, the pictures were taken perpendicularly to the seabed. The transects were done along a preset track across the reefs, number of pictures per transect varied based on diving time, with a minimum of 10 images per transect. Due to logistic problems, two transects were done for the east reef, and one for the west reef. The seabed images provide insights into the general composition of key species, higher systematic groups and ecological guilds. The images also contain valuable information on how benthic species are associated to each other. Dataset includes individual images, and metadata of each image including diving depth, date/time, and corresponding diver. Detailed geographical coordinates of individual images are unavailable.
Video transects were done using the A.IKANBILISTM hovering autonomous underwater vehicle (HAUV) of the company BeeX (https://beex.sg/a-ikanbilis/), which flew over the reefs along predefined transects at a depth of 0.5m above seabed and at a speed of 1 m s-1. From the dive videos of the HAUV, SBIs were extracted every 5 seconds. SBIs, each SBI features two parallel laser lines 25 cm away from each other. The camera used was a GoPro, the videos and pictures were taken perpendicularly to the seabed. The seabed images provide insights into the general composition of key species, higher systematic groups and ecological guilds. The images contain information on how benthic species are associated to each other. Transect files include individual images, whereas metadata of each image includes diving depth, date/time of transect. Geographical coordinates of some individual images is unavailable, images have a resolution of 300dpi and a size of 7 to 13 MB.
The dataset compiles recordings of the Helgoland Oyster Hatchery production seasons 2024 and 2025. European flat oyster spat-on-shell were produced in the Alfred Wegener Institute's hatchery (project PROCEED) to supply MPA management measures in Borkum Reefground and Sylt Outer Reef for oyster reef habitat restoration in the North Sea (project RESTORE). Data comprise daily logs tracking oyster broodstock, larval releases and rearing through the larval and settlement systems, environmental conditions, and phytoplankton feed concentrations. Spat-on-shell settlement and its average length before export are additionally present for production season 2025.
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