A5022220687- Marine Biology and Ecology Research
- Microbial Community Ecology and Physiology
- Parasite Biology and Host Interactions
- Nematode management and characterization studies
- Coral and Marine Ecosystems Studies
- Protist diversity and phylogeny
- Marine and coastal plant biology
- Marine Bivalve and Aquaculture Studies
- Ocean Acidification Effects and Responses
- Coastal and Marine Management
- Insect and Arachnid Ecology and Behavior
- Marine Ecology and Invasive Species
- Marine and fisheries research
- Coastal wetland ecosystem dynamics
- Cephalopods and Marine Biology
- Marine animal studies overview
- Insect symbiosis and bacterial influences
- Planarian Biology and Electrostimulation
- Marine and coastal ecosystems
- Bacteriophages and microbial interactions
- Isotope Analysis in Ecology
- Sustainability and Ecological Systems Analysis
- Genomics and Phylogenetic Studies
- Plant and animal studies
- Marine Biology and Environmental Chemistry
University of Vienna
2010-2024
HAW Hamburg
2000
Harvard University
1994
Chicago Zoological Society
1981
Universität Innsbruck
1974
University of North Carolina at Chapel Hill
1972
Abstract. In situ investigations of growth and production in a stand Posidonia oceanica (L.) DELILE at depth 4 m Ischia (Gulf Naples) were carried out over two growing seasons. starts to grow August an average bundle produces ten leaves increasing time intervals until May. Growth curves for the are given. Maximum leaf standing crop is May with 1300 g dry weight per m-2, area index this reaches 22 m2 m-2. Leaf net productivity highest March 12 day. Annual estimated as 3110 m2, "underground"...
Sulfur-oxidizing prokaryotes (SOP) catalyse a central step in the global S-cycle and are of major functional importance for variety natural engineered systems, but our knowledge on their actual diversity environmental distribution patterns is still rather limited. In this study we developed specific PCR assay detection dsrAB that encode reversely operating sirohaem dissimilatory sulfite reductase (rDSR) present many not all published genomes SOP. The was used to screen 42 strains SOP (most...
Abstract. The Stilbonemutinue (marine free‐living nematodes) arc remarkable for cctosymbiotic bacteria, which cover the greatest part of their body in a highly ordered and species specific pattern. Using SEM we describe main types symbiotic give evidence role bacteria nutrition host on basis stable carbon isotope ratios. In experimental systems worms migrated repeatedly across sulfide gradient during 12 h when concentrations were low, but stayed above maximum at high concentrations....
The phylogenetic relationship of chemoautotrophic, sulfur-oxidizing, ectosymbiotic bacteria growing on a marine nematode, Laxus sp. (formerly Catanema sp.), to known endosymbionts and free-living was determined. Comparative 16S rRNA sequencing used investigate the unculturable nematode epibionts, rRNA-targeted oligonucleotide hybridization probes were identify ectosymbionts in situ. Both analyses revealed remarkably specific stable symbiosis. Unique probe indicated that only one species...
ABSTRACT Although thiotrophic symbioses have been intensively studied for the last three decades, nothing is known about molecular mechanisms of symbiont acquisition. We used symbiosis between marine nematode Laxus oneistus and sulfur-oxidizing bacteria to study this process. In association a monolayer symbionts covers whole cuticle nematode, except its anterior-most region. Here, we identify novel Ca 2+ -dependent mannose-specific lectin that was exclusively secreted onto posterior,...
ABSTRACT Zoothamnium niveum is a giant, colonial marine ciliate from sulfide-rich habitats obligatorily covered with chemoautotrophic, sulfide-oxidizing bacteria which appear as coccoid rods and series of intermediate shapes. Comparative 16S rRNA gene sequence analysis fluorescence in situ hybridization showed that the ectosymbiont Z. belongs to only one pleomorphic phylotype. The moderately related previously identified groups thiotrophic symbionts within Gammaproteobacteria , shows highest...
Harnessing chemosynthetic symbionts is a recurring evolutionary strategy. Eukaryotes from six phyla as well one archaeon have acquired chemoautotrophic sulfur-oxidizing bacteria. In contrast to this broad host diversity, known bacterial partners apparently belong two classes of bacteria—the Gamma - and Epsilonproteobacteria . Here, we characterize the intracellular endosymbionts mouthless catenulid flatworm genus Paracatenula Alphaproteobacteria The galateia are provisionally classified “...
Burrows of decapod crustaceans were investigated by in situ resin casting various mangrove and back‐reef environments. Alpheid shrimps (A. floridanus A. heterochaelis) the most numerous burrowing soft muddy sediments channels. Their burrows consist either a single U or series U's inhabited pair shrimp are Y‐shaped gobiid associate. Large mounds deep funnels produced thalassinidean Glypturus acanthochirus, both bare channels subtidal sediments. spiral with several radiating branches leading...
Abstract. Two mouthless interstitial animals, a nematode and turbellarian were collected from reduced sediments surrounding polychaete tubes. The microorganisms in the gut rudiment of two animals described using TEM. occurrence freeliving marine relation to organic sulfide rich environments their association with is discussed. A description Astomonema jenneri n.gen., n. sp. (Nematoda, Siphonolaimidae) given an appendix.
Abstract The level of integration between associated partners can range from ectosymbioses to extracellular and intracellular endosymbioses, this has been assumed reflect a continuum less intimate evolutionarily highly stable associations. In study, we examined the specificity evolutionary history marine symbioses in group closely related sulphur‐oxidizing bacteria, called Candidatus Thiosymbion, that have established ecto‐ endosymbioses with two distantly animal phyla, Nematoda Annelida....
Marine nematodes that carry sulfur-oxidizing bacteria on their cuticle (Stilbonematinae, Desmodoridae) migrate between oxidized and reduced sand layers thereby supplying symbionts with oxygen sulfide. These symbionts, in turn, constitute the worms' major food source. Due to accessibility, abundance relative simplicity of this association, stilbonematids may be useful understand symbiosis establishment. Nevertheless, only symbiont Laxus oneistus has been found one single phylotype within...
A new genus of the marine Stilbonematinae (Nematoda, Desmodoridae) is described from Pacific coast United States America. The worms inhabit sulfidic sediment among roots surfgrass Phyllospadix sp. in rocky intertidal. ectosymbiotic coat a type for Stilbonematinae. It consists rod-shaped bacteria pointed at both poles densely attached with one pole to host cuticle. This first report this symbiotic nematode subfamily US West Coast.