A5002483331- Marine and coastal ecosystems
- Thallium and Germanium Studies
- Microbial Community Ecology and Physiology
- Radioactive element chemistry and processing
- Methane Hydrates and Related Phenomena
- Geochemistry and Elemental Analysis
- Marine Biology and Ecology Research
- Geology and Paleoclimatology Research
- Coastal wetland ecosystem dynamics
- Paleontology and Stratigraphy of Fossils
- Chemical Synthesis and Characterization
- Bacteriophages and microbial interactions
- Mercury impact and mitigation studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Analytical chemistry methods development
- Groundwater and Isotope Geochemistry
Carl von Ossietzky Universität Oldenburg
2019-2023
Submarine groundwater discharge (SGD) is an important source of nutrients and metals to the coastal ocean, affects ecosystems, gaining recognition as a relevant water resource. SGD usually quantified using geochemical tracers such radon or radium. However, few studies have also used dissolved silicon (DSi) tracer for SGD, DSi enriched in when compared surface waters. In this study, we discuss potential based on literature review two case from contrasting environments. first calculate fluxes...
Estuaries play a key role in controlling the land-ocean fluxes of dissolved organic matter (DOM), nutrients and trace metals. Here, we study how mangrove-fringed areas affect molecular DOM metal composition subtropical estuary. We combined analysis solid-phase extractable (SPE) using ultrahigh-resolution mass spectrometry with inorganic bulk parameter analyses surface porewater along estuarine gradient estuary Australia (Coffs Creek). Statistical mixing models demonstrate that fluvial...
Abstract The effects of species diversity on ecosystem functioning have been broadly studied, mostly considering random artificial assemblages. However, natural communities are shaped by ecological interactions and environmental conditions often leading to nonrandom extinctions. Here, we manipulated a phytoplankton community generating taxonomic gradient based rare exclusions conducted mesocosm experiment investigate the (resource use efficiency biomass) under two nutrient levels. We...
Rare earth elements (REEs) are used as powerful proxies for a variety of oceanic processes. The understanding their biogeochemical behaviour in the marine environment is therefore essential. While influence OM-cycling on REE patterns seawater considered insignificant, it has been shown that algae and bacteria provide good sorption surfaces REEs components dissolved OM pool able to complex REEs, thus potentially altering behaviour. To investigate impact bio-associated processes bio-productive...
Abstract Phytoplankton spring blooms are typical features in coastal seas and provide heterotrophic bacteria with a rich blend of dissolved substrates. However, they difficult to study in-situ. Here, we induced phytoplankton bloom followed its fate for 37 days four 600 L-mesocosms. To specifically investigate the significance phytoplankton-born organic carbon (DOC) used artificial seawater low DOC background inoculated it 100 µm-prefiltered plankton community from North Sea. A biphasic...
Abstract Mechanisms terminating phytoplankton blooms are often not well understood. Potentially involved processes such as consumption by grazers, flocculation, and viral lysis each have different post-bloom consequences on the processing of organic material, therefore it is important to develop a better understanding relevance these processes, potential interactions between them. In this study, we present model-based analysis spring bloom observed in mesocosm experiment. The...