A5078167214- Marine Sponges and Natural Products
- Marine Toxins and Detection Methods
- Neurobiology and Insect Physiology Research
- Ocean Acidification Effects and Responses
- Aquaculture Nutrition and Growth
- Neuroscience and Neuropharmacology Research
- Environmental Toxicology and Ecotoxicology
- Geology and Paleoclimatology Research
- Marine Biology and Environmental Chemistry
- Cephalopods and Marine Biology
- Paleontology and Stratigraphy of Fossils
- Marine Bivalve and Aquaculture Studies
- Ion channel regulation and function
- Crustacean biology and ecology
- Physiological and biochemical adaptations
- Receptor Mechanisms and Signaling
- Toxic Organic Pollutants Impact
- Coral and Marine Ecosystems Studies
- Protist diversity and phylogeny
- Neuroscience and Neural Engineering
- Calcium Carbonate Crystallization and Inhibition
- Chemical synthesis and alkaloids
- Marine Biology and Ecology Research
- Nicotinic Acetylcholine Receptors Study
- Drug Transport and Resistance Mechanisms
J.M. Burgerscentrum
2024
University of Warsaw
2024
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2014-2024
Kiel University
2024
University of Göttingen
2001-2002
Hygiene-Institut des Ruhrgebiets
1994-1998
Heinrich Heine University Düsseldorf
1993-1997
Philipps University of Marburg
1990-1993
The parasitic marine dinoflagellate Amoebophrya is the first known eukaryote with aerobic mitochondria without a genome.
Many invertebrate species inhabit coastal areas where loads of plastic debris and microplastics are high. In the current case study, we exemplarily illustrate principal processes taking place in Atlantic ditch shrimp, Palaemon varians, upon ingestion microplastics. laboratory, shrimp readily ingested fluorescent polystyrene microbeads 0.1-9.9 µm, which could be tracked within widely translucent body. Ingested food items as well micro-particles cumulate stomach they macerated mixed with...
Objectives In search for methods of anesthesia crustaceans, an implanted electrode into lobster and crayfish CNS enabled us to monitor signal propagation in the nerve system animals undergoing different protocols. Results Cooling (tap water 0°C, sea -1,8°C) with MgCl2 (10%) were both discarded as anesthetic procedures because responses external stimuli still detectable under treatment. Contrarily, bubbling aquarium CO2 can be considered a "partially successful" anesthesia, is inhibited but...
Significance Unicellular organisms form endless variability of complex skeletons that serve as archives Earth’s history and play a crucial role in global geochemical cycles. A longstanding question is how single cells control morphogenesis mineralization skeletal structures. Although already addressed by Sir D’Arcy W. Thompson, this problem still unsolved. Shell emerges from controlled cascade interactions at different levels cellular organization. To gain insight into its morphogenesis, we...
Abstract CA1 pyramidal neurons of the hippocampus express various types serotonin (5‐HT) receptors, such as 5‐HT 1A , 4 and 7 which couple to Gα i or s proteins operate on different intracellular signalling pathways. In present paper we verify differential serotonergic modulation for hyperpolarization‐activated current I h . Activation receptors induced an augmentation current‐induced hyperpolarization responses, while responses declined after were activated. The resting potential...
Thermal tolerance windows serve as a powerful tool for estimating the vulnerability of marine species and their life stages to increasing temperature means extremes. However, it remains uncertain which extent additional drivers, such ocean acidification, modify organismal responses temperature. This study investigated effects CO2 -driven acidification on embryonic thermal sensitivity performance in Atlantic cod, Gadus morhua, from Kattegat. Fertilized eggs were exposed factorial combinations...
The vulnerability of fish embryos and larvae to environmental factors is often attributed a lack adult-like organ systems (gills) thus insufficient homeostatic capacity. However, experimental data supporting this hypothesis are scarce. Here, by using Atlantic cod (Gadus morhua) as model, the relationship between embryo (to projected ocean acidification warming) capacity was explored through parallel analyses stage-specific mortality in vitro activity expression major ion pumps (ATP-Synthase,...
Calcium carbonate minerals produced by marine organisms play a central role in the global carbon cycle and sedimentation, which influence climate regulating atmospheric CO2 levels. Foraminifera are important single-celled that have calcite shells for over 300 million years. Here, we present new observations promoting our understanding foraminiferal biocalcification studying Amphistegina lessonii. We integrated vivo confocal autofluorescence dye fluorescence imaging with elemental analysis of...
Baltic mussels (Mytilus spp.) were exposed to the explosive trinitrotoluene (TNT) for 96 h (0.31–10.0 mg/L) and 21 d (0.31–2.5 mg/L). Bioaccumulation of TNT its degradation products (2- 4-ADNT) as well biological effects ranging from gene cellular levels behaviour investigated. Although no mortality occurred in concentration range tested, uptake metabolism responses antioxidant enzymes histochemical biomarkers observed already at lowest concentrations. The characteristic shell closure...
We have reported recently that the mouse 5-hydroxytryptamine(4a) (5-HT(4(a))) receptor undergoes dynamic palmitoylation (Ponimaskin, E. G., Schmidt, M. F., Heine, M., Bickmeyer, U., and Richter, D. W. (2001) Biochem. J. 353, 627-663). In present study, conserved cysteine residues 328/329 in carboxyl terminus of 5-HT(4(a)) were identified as potential acylation sites. contrast to other palmitoylated G-protein-coupled receptors, additional residue 386 positioned close COOH-terminal end was...
Marine teleost fish sustain compensation of extracellular pH after exposure to hypercapnia by means efficient ion and acid-base regulation. Elevated rates regulation under may be stimulated further elevated temperature. Here, we characterized the transepithelial transporters (NKCC1, NBC1, SLC26A6, NHE1 2) ATPases (Na(+)/K(+) ATPase V-type H(+) ATPase) in gills Atlantic cod (Gadus morhua) 4 weeks ambient future PCO2 levels (550 μatm, 1200 2200 μatm) at optimum (10 °C) summer maximum...
The close association between animals and their associated microbiota is usually beneficial for both partners. Here, we used a simple marine model invertebrate, the flatworm Macrostomum lignano, to characterize host-microbiota interaction in detail. This analysis revealed that different developmental stages each harbor specific microbiota. Studies with gnotobiotic clarified physiological significance of While no fitness benefits were mediated by when food was freely available, showed...
Abstract Background For marine snails, olfaction represents a crucial sensory modality for long-distance reception, as auditory and visual information is limited. The posterior tentacle of Aplysia , the rhinophore, chemosensory organ several behavioural studies showed that rhinophores can detect pheromones, initiate orientation locomotion toward food. However functional neuroanatomy rhinophore not yet clear. Here we apply serotonin-immunohistochemistry fluorescent markers in combination with...
Summary Respiration rate of meiofauna is difficult to measure, and the response variations in environmental oxygen concentrations has so far been mainly addressed through behavioral investigation. We investigated effect different on physiology marine platyhelminth Macrostomum lignano. was measured using batches 20 animals a glass microtiter plate equipped with optical sensor spots. At higher saturations (>12kPa), showed clear oxyconforming behavior. However, below this values,...
The mouse 5-hydroxytryptamine 4(a) receptor [5-HT4(a)] was expressed with a baculovirus system in insect cells and analysed for acylation. [3H]Palmitic acid effectively incorporated into 5-HT4(a) label sensitive to the treatment reducing agents indicating thioester-type bond. Analysis of protein-bound fatty acids revealed that contains predominantly palmitic acid. Treatment infected Sf9 (Spodoptera frugiperda) BIMU8...
The global degradation of coral reefs is steadily increasing with ongoing climate change. Yet larvae settlement, a key mechanism population rejuvenation and recovery, largely understudied. Here, we show how the lipophilic, settlement-inducing bacterial pigment cycloprodigiosin (CYPRO) actively harvested subsequently enriched along ectoderm scleractinian Leptastrea purpura. A light-dependent reaction transforms CYPRO molecules through photolytic decomposition provides constant supply hydrogen...