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Untersuchungen zum Einfluss von UV-Strahlung auf das System arktischer Daphnien/Futteralgen in Bezug auf Reproduktion, Schutzmechanismen, Überleben und UV-Toleranz unter Labor- und natürlichen Bedingungen

In dem geplanten Projekt sollen die Auswirkungen von UV-Strahlung sowohl auf Daphnien als auch auf deren Futteralgen untersucht werden. Dies soll Einblicke in die komplexen Wirkweisen von solarer UV-Strahlung auf biotische Systems, wie sie in arktischen Kleingewässern zu finden sind, erlauben. Veränderungen im Wachstum, Protein- und Kohlenhydratgehalt, sowie im Gehalt an Pigmenten, Lipiden und möglicher Schutzsubstanzen (MAAs) der UV-bestrahlten Futteralgen sollen dokumentiert und deren Einfluss auf die UV-Toleranz, die Lebensdauer und die Reproduktionsfähigkeit von Daphnien getestet werden. Schwerpunktmäßig soll die Rolle der in die Fetttröpfchen der Daphnien eingelagerten pflanzlichen Carotinoide und die Lipidreservestoffe der Daphnien untersucht werden. Darüber hinaus soll festgestellt werden, ob der Gehalt an UV-Schutzsubstanzen (Mycosporin like Amino Acids) durch UV-Bestrahlung in den Algen bzw. den Daphnien beeinflusst werden kann. Die im Labor gewonnenen Ergebnisse werden im Freiland unter natürlichen Bedingungen überprüft.

Lead, copper, and silver isotope analysis of Roman silver coins enriched with metainformation

This dataset is a database of geochemical data, especially isotope analysis, for a selection of Roman denarii. The selection was primarily based on numismatic criteria. The focus is on denarii from the late Republic until the reign of Severus Alexander (220 CE) found in Germany. The data were collected as part of the first author's PhD thesis (T. Greifelt), with interpretation to follow in the completed thesis. A total of 213 denarii were sampled through several campaigns between 2017 and 19 from four collections including the LWL Museum für Kunst und Kultur Münster; the hoards from Hanau-Kesselstadt, Hanauer Geschichtsverein, Historisches Museum Hanau Schloss Philippsruhe; Regensburg-Kumpfmühl, Historisches Museum Regensburg; and coins from the Varusschlacht-Museum and Park Kalkriese. Sampling was carried out via drilling. The chemical preparation adhered to standard geochemical workflows adapted for archaeometric analysis. Analysis methods included EPMA and MC-ICP-MS. In this initial version of the publication, a data file with isotope results and detailed metadata is provided in .csv format. A subsequent version will include a second file with the elemental composition of the coins. The metadata profile of TerraLID (https://metadata.terralid.org/latest/pdf/TerraLID_Metadata_Profile.pdf ) was followed, which was specifically designed for applying (lead) isotope and elemental analysis to archaeological material. Geochemically obtained isotope and elemental data are used in archaeometallurgy to identify metal sources exploited in the production of ancient materials such as metal, glass, pigments, and others.

Coastal Atmosphere & Sea Time Series (CoASTS) and Bio-Optical mapping of Marine optical Properties (BiOMaP): the water hyperspectral absorption coefficients

The CoASTS-BiOMaP data set of hyperspectral absorption coefficients, complementary to the bio-optical data set accessible at https://doi.org/10.1594/PANGAEA.971945, were determined from laboratory analysis of discrete water samples collected at approximately 1 m depth during the Coastal Atmosphere & Sea Time Series (CoASTS) and the Bio-Optical mapping of Marine optical Properties (BiOMaP) measurement programs. The dataset, resulting from the collaboration between the Marine Optical Laboratory of the Joint Research Center (JRC) and a number of European national institutions, comprises absorption coefficients of pigmented and non-pigmented particles in the 400-750 nm interval, and those by colored dissolved organic matter in the 350-680 nm interval, provided with 3 nm spectral resolution at 2 nm increment. All coefficients were determined applying identical sampling, laboratory, processing and quality control methods, regardless of the measurement program or geographic areas. A few spectra of absorption coefficients for pigmented particles exhibit some unrealistic negative values beyond approximately 500 nm explained by limits of the measurement methodology in the presence of a low concentration of particles largely associated with sampling in oligotrophic waters. These spectra were not excluded from the data set expecting their application can be still relevant once the absorption coefficients are corrected for their background in the near-infrared. Overall, the data set comprises absorption spectra from 2549 stations. Of these, 634 stations refer to 125 CoASTS field campaigns performed from October 1998 up to March 2016 on-board the Acqua Alta Oceanographic Tower (AAOT) in the northern Adriatic Sea representing moderate optically complex waters with properties largely determined by phytoplankton, as well as diverse concentrations of suspended particulate matter (SPM) and of coloured dissolved organic matter (CDOM). The remaining 1915 stations are from 36 BiOMaP oceanographic campaigns performed between July 2000 and May 2022 in various European marine regions: the Baltic Sea with waters dominated by a high concentration of CDOM; the Adriatic Sea, Black Sea, North Sea (comprising the English Channel), Ligurian Sea, Iberian Shelf and the Greenland Sea, exhibiting a variety of optically complex waters determined by diverse concentrations of CDOM and SPM; the Eastern and Western Mediterranean oligotrophic and mesotrophic Seas.

KOSMOS 2023 Helgoland mesocosm study on ocean alkalinity enhancement: sediment trap particle flux data and water column biogeochemistry

The data presented herein originates from a mesocosm study conducted as part of the BMBF CDRmare, Retake project (grant agreement no. 03F0895A), aimed at investigating the ecological ramifications of ocean alkalinity enhancement (OAE). Twelve mesocosms were deployed in Helgoland South Harbor, Germany, and systematically sampled using integrated water samplers over the period spanning from March 12th to April 20th, 2023. Six alkalinity levels under two dilution scenarios were established to differentiate between localized and uniform OAE additions. Alkalinity was increased stepwise to ΔTAmax = 1250 μmol kg-1 (250 μmol TA kg-1 increments) using sodium hydroxide (NaOH) with calcium chloride (CaCl2) to simulate cation release during calcium-based mineral dissolution, causing strong carbonate chemistry perturbations (e.g., pHT > 9.25). The dataset encompasses a spectrum of sediment trap particle flux data, water column biogeochemistry including pigment variables, inorganic nutrients, carbonate chemistry parameters. The study and data set offer insights into impacts of alkalinity enhancement on marine ecosystems and their associated biogeochemistry.

Coastal Atmosphere & Sea Time Series (CoASTS) and Bio-Optical mapping of Marine optical Properties (BiOMaP): the near- surface marine bio-optical data

The CoASTS-BiOMaP data set comprises in situ near-surface inherent (e.g., absorption, scattering and backscattering coefficient s) and apparent (e.g., normalized-water leaving radiance and the corresponding remote sensing reflectance) optical properties of relevance for satellite ocean colour applications. The data were produced through the Coastal Atmosphere & Sea Time Series (CoASTS) and the Bio-Optical mapping of Marine optical Properties (BiOMaP) measurement programs implemented by the Marine Optical Laboratory of the Joint Research Center (JRC) in collaboration with a number of European institutions. Common to both CoASTS and BiOMaP is the standardization of instruments, measurement methods, quality control schemes and processing codes to enforce temporal and spatial consistency to data products. CoASTS measurements comprise 125 field campaigns and 637 stations performed from December 1998 up to March 2016 benefitting of the Acqua Alta Oceanographic Tower (AAOT) in the northern Adriatic Sea to generate time series data at a fixed coastal site. CoASTS data exhibit occurrence of waters with optical properties largely determined by phytoplankton, as well as diverse concentrations of suspended particulate matter (SPM) and of coloured organic matter (CDOM). BiOMaP measurements comprise 36 bio-optical oceanographic campaigns and 1915 stations performed between July 2000 and May 2022 using a variety of oceanographic vessels to produce spatially distributed data across various European Seas. BiOMaP measurement regions include: the Baltic Sea exhibiting waters dominated by a high concentration of CDOM; the Adriatic Sea, Black Sea, North Sea (comprising the English Channel), Ligurian Sea, Iberian Shelf and the Greenland Sea, characterized by a variety of optically complex waters determined by diverse concentrations of CDOM and SPM; the Eastern and Western Mediterranean oligotrophic and mesotrophic Seas.

Chlorophyll a, extracellular polymeric substance concentration and 16S rRNA gene copy numbers in saltmarsh sediments in response to a storm surge

Samples were taken to study the effect of storm surges on ecosystem functioning of salt marsh microbial communities. Sediment samples were collected from experimental salt marsh islands located in the back-barrier tidal flats of Spiekeroog Island, German North Sea (53°45′N, 7°43′E). The islands consist of three elevation zones (0.7 m, 1.0 m, and 1.3 m above mean sea level), corresponding to pioneer zone, lower salt marsh, and upper salt marsh. Six islands were sampled (three initially bare; three transplanted with lower salt marsh sediment and vegetation). Sampling was conducted in September 2022 (pre-disturbance), March 2023 (post-winter storm surges), and August 2023 (recovery phase). Surface sediments (upper 2 cm) were collected using syringe cores. Pooled samples were analyzed for chlorophyll a as a proxy for microphytobenthos biomass using ethanol extraction and spectrophotometric pigment analysis. Extracellular polymeric substances (EPS) were quantified using EDTA extraction followed by phenol–sulfuric acid carbohydrate analysis. DNA was extracted from sediment subsamples using a Qiagen PowerSoil kit. Prokaryotic abundance was estimated by quantitative PCR targeting the 16S rRNA gene (primers 519F/907R), using an Escherichia coli 16S rRNA gene standard curve. The dataset includes chlorophyll a concentrations (µg g⁻¹ dry sediment), EPS carbohydrate concentrations, and prokaryotic 16S rRNA gene copy numbers for all sampling times, elevations, and treatments.

Chlorophyll a, extracellular polymeric substance concentration and 16S rRNA gene copy numbers in sediments in response to a marine heatwave

This dataset originates from a laboratory mesocosm experiment investigating the effects of simulated marine heatwaves (MHWs) on benthic microbial communities from sublittoral sediments of Spiekeroog (Wadden Sea, Germany). Surface sediments were sieved (1 mm) and incubated under controlled light and temperature conditions before exposure to three temperature treatments (19 °C control, 23 °C, and 25 °C). Following a gradual warming phase, MHW conditions were maintained for six days, followed by a recovery phase at ambient temperature. Sediment samples were collected repeatedly throughout the experiment. Surface sediments (upper 2 cm) were collected using syringe cores. Pooled samples were analyzed for chlorophyll a as a proxy for microphytobenthos biomass using ethanol extraction and spectrophotometric pigment analysis. Extracellular polymeric substances (EPS) were quantified using EDTA extraction followed by phenol–sulfuric acid carbohydrate analysis. DNA was extracted from sediment subsamples using a Qiagen PowerSoil kit. Prokaryotic abundance was estimated by quantitative PCR targeting the 16S rRNA gene (primers 519F/907R), using an Escherichia coli 16S rRNA gene standard curve. The dataset includes chlorophyll a concentrations (µg g⁻¹ dry sediment), EPS carbohydrate concentrations, and prokaryotic 16S rRNA gene copy numbers for all sampling times, elevations, and treatments.

Errichtung einer Ozonungsanlage zur Entfärbung von stark farbigen Abwässern aus der Reaktivfärbung und Recycling des entfärbten Abwassers

Die Hecking Deotexis GmbH ist ein 150 Jahre altes, mittelständisch geprägtes Textilunternehmen am Standort Neuenkirchen. Das Unternehmen stellt Oberbekleidungsstoffe für Damen und Herren her. Es verfügt über eine Weberei, Färberei und Ausrüstung. So werden u. a. Baumwolle und Elastomerfäden mit Reaktivfarbstoffen und Pigmenten gefärbt. Eine Besonderheit ist die Indigo-Kettfärbeanlage für Jeans. Die Firma plant die Errichtung einer neuen Anlage, wo die konzentrierten Abwässer aus der Färberei von Baumwollwebware mit Hilfe eines Ozonungsverfahren entfärbt und praktisch vollständig wieder verwendet werden sollen. Dazu sollen die konzentrierten Farbabwässer aus den verschiedenen Behandlungsstufen zusammengeführt und in einem Reaktor mit Ozon entfärbt werden. Die Ozonungsanlage wird in eine neue betriebliche Anlage integriert. Die Wiederverwendung des entfärbten Abwassers kann allerdings wegen der Aufkonzentrierung der Salze nicht im kompletten Kreislauf stattfinden. Die eine Hälfte soll als Waschwasser wieder in die Farbnachwäsche gehen, d.h. im eigentlichen Färbeprozess wieder eingesetzt werden, die andere Hälfte soll für innerbetriebliche Prozesse wie das Reinigen von Gefäßen und Ansatzbehältern genutzt werden. Dieses hat eindeutige Vorteile gegenüber den herkömmlichen Verfahren. So ist kein Einsatz zusätzlicher Chemikalien notwendig, es erfolgt eine Verringerung der anfallenden Klärschlammmenge und eine Einsparung von über 5000 Kubikmeter Frischwasser pro Jahr. Auch die kommunale Kläranlage, in die die Färbeabwässer bislang ungeklärt eingeleitet wurden, wird deutlich entlastet. Allerdings liegt der Energiebedarf bei der Ozonung höher, soll aber durch eine Optimierung des Verfahrens gesenkt werden.

Erfassung der Planktonbiomasse des Bodensee-Obersees mit Hilfe von Summenparametern

Erfassung der Planktonbiomasse des Bodensee-Obersees mit rasch, z.T. kontiunierlich messbaren Summenparametern (Protein, Algenpigmente, in-vivo-Fluoreszenz des Phytoplanktons, Coulter-Counter-Volumen, ATP) als Grundlage fuer genauere Biomassenbilanzierungen. Die Messungen werden in woechentlichem Abstand in je 12 bis 42 Seewasserproben durchgefuehrt.

Untersuchungen zur Qualitaetsueberwachung von Pigmenten

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