API src

Found 3482 results.

Related terms

Analytical data of a buried and a recent surficial Chernozem in the Bornhöck area in Central Germany

This dataset contains analytical data of two studied soil profiles, one of a buried (BH-II) and one of a recent surficial Chernozem (BH-rec) in the Bornhöck area in Central Germany (southern Saxony-Anhalt). At BH-II, the Chernozem was buried by the Early Bronze Age burial mound 'Bornhöck' about 3.8 ka. The study area is described in Suchodoletz et al. (2023). During our research we measured grain sizes, organic carbon and carbonate contents, black carbon, soil isotopes, elements and lignin phenols (S/V and C/V). The measurements were performed between 2019 and 2024. The goal of our study was to evaluate regional soil formation and human impact since the Early Bronze.

KOSMOS 2023 Helgoland mesocosm study on ocean alkalinity enhancement: dissolved inorganic nutrients, chlorophyll a and suspended particulate organic matter

We conducted a mesocosm study to investigate ecosystem responses to ocean alkalinity enhancement (OAE) in the temperate waters of the German North Sea on Helgoland in spring 2023. We simulated non-CO2-equilibrated OAE via calcium hydroxide through the addition of calcium chloride and sodium hydroxide. Twelve 6 m³ mesocosms were used to simulate two scenarios: in six mesocosms we established a gradient of added alkalinity from 0 to 1250 µmol/kg in increments of 250 µmol/kg, simulating immediate (imm) dilution of alkalised waters. For the second set of six mesocosms, alkalinity was added only to the top 1 m of each mesocosm, doubling the target added alkalinity. The top layer was mixed with the untreated bottom layer after 48 hours, simulating delayed dilution of alkalised waters (del) and ultimately leading to the same alkalinity gradient as the immediate dilution treatment. This data contains water column biogeochemical variables, including dissolved inorganic nutrient concentrations (µmol/L), chlorophyll a concentrations (µg/L) and suspended particulate matter (biogenic silica, particulate organic carbon, nitrogen and phosphate; µmol/L). Nutrients, particulate organic phosphate and biogenic silica were measured spectrophotometrically (Unicam UV 300, Thermo Spectronic, USA). High-performance liquid chromatography (Thermo Scientific HPLC Ultimate 3000) was performed for chlorophyll a determination and particulate organic carbon and nitrogen were measured using an elemental analyser (Flash EA, Thermo Fisher).

Messstelle 3044 Dennweiler-Frohnbach (Messstellen-Nr: 2546105900)

Die Messstelle 3044 Dennweiler-Frohnbach in Rheinland-Pfalz dient der Überwachung von Grundwasserstände. Zeitreihen abiotische Parameter werden derzeit nicht gemessen.

Fließgewässer – Nährstoffe und Salze (Datensatz)

Der Datensatz enthält die statistischen Kennzahlen (z.B. Mittelwert, Perzentile, Maximum) für etwa 250 Messstellen in Fließ- und Übergangsgewässern (LAWA Messstellennetz) sowie Angaben zu den Messstellen. Die Daten sind Grundlage für die Auswertungen der Applikation „Fließgewässer - Nährstoffe und Salze“ (siehe auf der rechten Seite unter "Download-Links").

Ecosystem functions of rare arable plants - field study: Soil data

Taken from the methods of https://doi.org/10.1016/j.agee.2020.107237: The effect of rare arable plants on soil nutrient concentration was measured by taking soil samples in the 1st and 2nd study year (March 2018 and August 2019). One soil sample per plot was taken to a 20 cm depth and analyzed by the AGROLAB Group (Landshut, Germany) for soil organic matter [%] and nitrogen concentration [%] (DIN EN 15936; 2012 and DIN EN 16168; 2012-11).

Dissolved and particulate trace metal and rare earth element (REE) concentrations during a mesocosm based phytoplankton bloom simulating intertidal coastal conditions

We analyzed concentrations of dissolved and particulate trace metals, including iron (Fe), manganese (Mn), vanadium (V), molybdenum (Mo), thallium (Tl), and rare earth elements (REE), during a mesocosm-based phytoplankton summer bloom mimicking the intertidal zone of the southern North Sea (Jade Bay). The studies aimed to identify key drivers controlling their biogeochemical cycling in dynamic, high-productivity coastal environments. Our results highlight the tidally influenced coastal zone as a critical interface that alters the behavior of supposedly conservative elements such as Mo and Tl (Mori et al., 2021) as well as natural and anthropogenic REE (incl., lanthanum, samarium, and gadolinium) (Mori et al., 2026). Trace metal concentrations and shale-normalized REE patterns, determined by quadrupole inductively coupled plasma–mass spectrometry (ICP-MS) and inductively coupled plasma–optical emission spectrometry (ICP-OES), were combined with biogeochemical bulk parameters and pigment-based assessments of phytoplankton growth and community composition (Mustaffa et al., 2020). Trace metal and REE cycling were evaluated in relation to phytoplankton dynamics, particulate organic matter composition (C, N, P), dissolved organic carbon, total dissolved nitrogen, and macronutrient concentrations (nitrate, ammonium, silicate, and inorganic phosphate). The dataset was obtained during a Planktotron-based mesocosm experiment conducted within the framework of the Coastal Ocean Darkening project (Mustaffa et al., 2020).

Soil porewater chemistry survey of European peatlands

Porewater and soil samples were collected from 64 natural and rewetted peatlands across Germany (47 sites), Poland (5), Estonia (6), Scotland (3), Sweden (2), and Georgia (1) between 1997 and 2017. A total of 812 anoxic porewater samples were taken from water-saturated soil layers (0–0.6 m depth) using dialysis samplers along 10–20 m transects (Hesslein, 1976). Selected fen sites were monitored for 10–20 years post-rewetting to assess seasonal and long-term nutrient dynamics. The peatlands varied in drainage history and land use intensity, resulting in different degrees of decomposition in the upper peat layers (0–0.4 m depth). The dialysis sampling technique enabled unbiased sampling of oxygen-sensitive dissolved solutes and provided vertical concentration profiles of porewater chemistry (Zak et al., 2004). The data were used to compare porewater composition between rewetted and natural peatlands (bogs and fens), (ii) evaluate the influence of peat characteristics on porewater chemistry in rewetted sites, (iii) examine seasonal variations in nutrient concentrations in rewetted fens, and (iv) assess long-term changes in porewater composition following rewetting.

Messstelle 6063 Neuwied, Heimbach (Messstellen-Nr: 2713162300)

Die Messstelle 6063 Neuwied, Heimbach in Rheinland-Pfalz dient der Überwachung von Grundwasserstände. Zeitreihen abiotische Parameter werden derzeit nicht gemessen.

Messstelle 1248 Wörth am Rhein, Büchelberg (Messstellen-Nr: 2373111900)

Die Messstelle 1248 Wörth am Rhein, Büchelberg in Rheinland-Pfalz dient der Überwachung von Grundwasserstände. Zeitreihen abiotische Parameter werden derzeit nicht gemessen.

Messstelle 4044 A Schwirzheim (Messstellen-Nr: 2664170400)

Die Messstelle 4044 A Schwirzheim in Rheinland-Pfalz dient der Überwachung von Grundwasserstände. Zeitreihen abiotische Parameter werden derzeit nicht gemessen.

1 2 3 4 5 … 347 348 349