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North Sea Manuscript data
No full textAll data associated to published article "Tidal and seasonal influence on cold seep activity and methanotroph efficiency in the North Sea" in Nature Communications Earth & Environmen
MOBYDICK Zooplankton Fatty Acid
No full textKnowledge of the trophic ecology of zooplankton is essential for evaluating their functional roles in marine food webs and nutrient cycling since they represent the link between primary producers and higher trophic levels. Here we investigated the fatty acid (FA) composition of different zooplankton size classes and selected species collected at the vicinity of the Sub-Antarctic Kerguelen Islands in late austral summer 2018 as part of the MOBYDICK research project. The analysis revealed that zooplankton FA composition varied significantly across size classes and species but not among stations. Larger zooplankton generally had higher total FA (TFA) amounts per dry weight (22.1 ± 3.0 vs. 61.9 ± 11.8 mg g-1). Essential FAs (EFA) accounted for 40.5 ± 0.8 % of TFA, with 22:6n-3 (DHA) and 20:5n-3 (EPA) being the most prominent. Diatom trophic markers (TM) were abundant in larger zooplankton size classes, while non-diatom TM were more prevalent in smaller size classes. The FA-based nutritional quality index (NQI) of zooplankton was positively correlated with EFA, and it was higher than the NQI of phytoplankton concurrently collected, indicating its better nutritional quality compared to primary producers. This study highlights the importance of size and species-specific dietary preferences in determining zooplankton FA profiles and the high nutritional quality of this group collected during late austral summer, which significantly contribute to our understanding of zooplankton's ecological role in marine food webs in the Southern Ocean
Seasonal dynamics and diversity of Antarctic marine viruses reveal a novel viral landscape
No full textData related to "Seasonal dynamics and diversity of Antarctic marine viruses reveal a novel viral landscape
Cruise report 64PE524 - ReViFES
No full textThis cruise was carried out for the ReViFES project ?North Sea Reef Vitalization for Ecosystem Services (North Sea ReViFES)?. The ReViFES project started in 2020 and aims to investigate in how far reefs in the North Sea provide additional value to ecosystem biodiversity and functioning, including ecosystem services such as food provision, spill over of commercial species, carbon storage and increased food web complexity. To attain this, the project studies multiple types of reefs in the North Sea, including flat oysters (Ostrea edulis), mussel beds (Mytilus edulis), Ross worm (Sabellaria spinulosa), sand mason (Lanice conchilega), horse mussels (Modiolus modiolus) and geogenic reefs (rocks). The aim is to generalise observations across all these reef types and assess how reefs with high densities of flat oysters differ from the other types. The project aims to investigate reefs in the most undisturbed form possible, realising that any reefs in the North Sea will have been influenced by humans.
The various aspects of the project are investigated by filming the seabed using a drop cam / towed video system, sediment grabs (box corer & Hamon grab), water samples, zooplankton traps, eDNA and the placement of cages to catch large species such as fish, crabs, whelks and lobsters.
The ReViFES carried out by a consortium of the Netherlands Institute of Sea Research, Wageningen University & Research, Waardenburg Ecology, TU Delft, van Oord, WWF, the North Sea Foundation, the Ministry of LNV, Ark, CIV den Oever, Natuur & Milieu, Roem van Yerseke, Sas Consultancy and is funded by NWO TTW Open Technology programme (project number 17671) with cofunding from the consortium partners
Cruise report 64PE485 - ReViFES Borkum reef grounds
No full textThis cruise was carried out for the ReViFES project. The rationale behind this cruise and project is to find out what the scale of ecosystem services of reef structures are in the North Sea. The focal area was the Borkum Reef grounds on the border of the Dutch - German continental shelf, situated approximately 20 km offshore (north) from the island of Schiermonnikoog. In 2018 WWF started an experiment in this area by creating a man made European flat Oyster reef on an area of 100 ? 100 m. Close to the site of the man-made oyster reef is a small rocky reef and a well developed Lanice conchilega reef. Aim of the project is to compare biodiversity and ecosystem functioning of these reef structures to the surrounding area without reef like structures
Thaumarchaeotal culture data_NF5_D3C
No full textThis file contains culture data from two Thaumarchaeotal strains Nitrosopumilus adriaticus NF5 and Nitrosopumilus piranensis D3C used in the study 'Controls on the composition of hydroxylated isoGDGTs in cultivated ammonia oxidizing Thaumarchaeota'. The excel sheet contains information regarding the core lipids and IPLs of iso-GDGTs and OH-isoGDGTs from cultures grown at different temperatures and harvested at different growth phases
Data of Seasonal changes in bay water around Curacao
No full textAs endpoints of watersheds, bays often collect and concentrate erosion- and human-derived substances such as sediments, dissolved inorganic nutrients and pollutants. Through their connection with the ocean, the export of substances from bays to the coastal zone will affect the nearby benthic shallow ecosystems. We investigated the water movement and biogeochemistry of two bays with different adjacent land uses, Piscadera Bay and Spaanse Water, along the south coast of Curaçao during the Caribbean dry (May 2022 and 2023) and wet seasons (November 2021 and 2023). Water exchange between the bay and offshore waters was limited during the dry season for both bays, enhancing dissolved inorganic nutrient concentrations within the bays. The wet season showed increased mixing between bay and offshore water. Extreme weather conditions during the 2023 wet season due to an El Niño episode, resulted in heavy rainfall and runoff with an increased influx of waste water into the bay. This was apparent from the enriched δ15N and total xenobiotic concentrations that were over 1.5 times higher than were measured in the dry season. During the wet season, Piscadera Bay is subjected to higher wastewater influx and indeed exhibited elevated δ¹⁵N and δ¹³C values, indicating greater terrestrial influence than Spaanse Water. While this study includes data from one El Niño event, it highlights how extreme weather can boost nutrient and xenobiotics export from bays to the ocean, offering insights into potential impacts on nearby reefs under future climate change scenarios
EMORID_tox riverine database 2024nov20
No full textThis dataset has been created by OSPAR's ICG-EMO for ecosystem modelling purposes and contains daily discharge and hazardous substance load files for all countries bordering the Northwest European Shelf or the Baltic. The files area available per country or as 1 complete set, with each country folder containing 2 subdirectories: DirectsD (containing direct discharge data) and Rivers (containing riverine data). Each file is self-containing and contains, if present, the mandatory substances reported to OSPAR (Cd, Pb, Hg, Cu, Zn, PCBs, g-HCH, PCBs-SPM) or HELCOM (Cd, Pb, Hg, Cu, Zn). For each country the annual discharge and nutrient loads add up to officially reported loads from OSPAR and HELCOM. See the provided dataset guide for more details
OHGDGT surface sediment data from Mediterranean and Red Seas
No full textThis file contains surface sediment data from the global ocean used in the study'Impact of water depth on the distributions and proxies of isoprenoidal hydroxylated GDGTs in the Mediterranean Sea and the Red Sea'. The excel sheet contains information regarding the surface sediments, their location, enivironmental parameters from each location extracted from WOA database, peak area of iso-GDGTs and OH-isoGDGTs, proxy indices discussed in the study and references for previously published data
Habitat modification by marram grass negatively affects recruitment of conspecifics
No full textEcosystem engineers alter their environment often benefiting their own survival and growth yielding self-reinforcing feedbacks. Moreover, these habitat modifications have been found to facilitate recruitment of conspecifics for some species, while for others engineering inhibits recruitment. Whether dune grasses facilitate or inhibit recruitment of conspecifics is yet unknown. Here, we investigated how habitat modification by European marram grass (Ammophila arenaria) through embryonic dune development affects recruitment from seeds and marine dispersed rhizome fragments. Specifically, we tested at three locations with different dune morphologies how habitat modification affected natural seed and rhizome presence and shoot emergence from plots in which seeds or rhizome fragments were added. In addition, we investigated how sediment burial (i.e., the main effect of habitat modification by dune grasses) affected germination and emergence in a controlled experiment. Results show that regardless of habitat modification or beach width, seeds and rhizomes were absent in natural conditions. Habitat modification negatively affected shoot emergence from seeds (8x less) and rhizomes (4x less) and was negatively related to sediment dynamics. Furthermore, fewer seedlings were found with higher elevations. In controlled laboratory conditions, the highest seedling emergence was found with slight burial (0.5-3cm); both germination and seedling emergence decreased as seeds were buried deeper or shallower. Overall, habitat modification by marram grass negatively affects recruitment of conspecifics through increased sediment dynamics and elevation. Consequently, storm events or eradication programs that include removal of adult vegetation - which leads to an unmodified system - might benefit new recruitment from seeds or clonal fragments