A5052869690- Marine Biology and Ecology Research
- Coral and Marine Ecosystems Studies
- Marine and coastal plant biology
- Marine Bivalve and Aquaculture Studies
- Ocean Acidification Effects and Responses
- Coastal wetland ecosystem dynamics
- Microbial Community Ecology and Physiology
- Marine and fisheries research
- Marine Sponges and Natural Products
- Marine and coastal ecosystems
- Cephalopods and Marine Biology
- Indigenous Studies and Ecology
- Coastal and Marine Management
- Environmental DNA in Biodiversity Studies
- Freshwater macroinvertebrate diversity and ecology
- Marine Toxins and Detection Methods
- Plant and animal studies
- Aquatic Invertebrate Ecology and Behavior
- Potato Plant Research
- Aquaculture Nutrition and Growth
- International Maritime Law Issues
- Cassava research and cyanide
- Evolution and Genetic Dynamics
- Aquaculture disease management and microbiota
- Wastewater Treatment and Nitrogen Removal
Stazione Zoologica Anton Dohrn
2017-2025
Klaipėda University
2019-2023
University of Vienna
2016-2019
Leibniz Centre for Tropical Marine Research
2014-2018
Fahrenheit (Germany)
2014
Marche Polytechnic University
2012-2013
University of Genoa
2011
Chemosynthetic symbioses are partnerships between invertebrate animals and chemosynthetic bacteria. The latter the primary producers, providing most of organic carbon needed for animal host's nutrition. We sequenced genomes symbionts from lucinid bivalve Loripes lucinalis stilbonematid nematode Laxus oneistus. both host species encoded nitrogen fixation genes. This is remarkable as no marine symbiont was previously known to be capable fixation. detected nitrogenase expression by clams at...
Functional traits define species by their ecological role in the ecosystem. Animals themselves are host-microbe ecosystems (holobionts), and application of ecophysiological approaches can help to understand functioning. In hard coral holobionts, communities dinitrogen (N2)-fixing prokaryotes (diazotrophs) may contribute a functional trait providing bioavailable nitrogen (N) that could sustain productivity under oligotrophic conditions. This study quantified N2 fixation diazotrophs associated...
Host-microbe interactions play crucial roles in marine ecosystems. However, we still have very little understanding of the mechanisms that govern these relationships, evolutionary processes shape them, and their ecological consequences. The holobiont concept is a renewed paradigm biology can help to describe understand complex systems. It posits host its associated microbiota with which it interacts, form holobiont, be studied together as coherent biological functional unit biology, ecology,...
The red coral Corallium rubrum is a habitat-forming species with prominent and structural role in mesophotic habitats, which sustains biodiversity hotspots. This precious threatened by both over-exploitation temperature driven mass mortality events. We report here that biocalcification, growth rates polyps' (feeding) activity of are significantly reduced at pCO2 scenarios predicted for the end this century (0.2 pH decrease). Since C. long-living (>200 years), our results suggest ocean...
Abstract Seagrass meadows form highly productive and diverse ecosystems in coastal areas worldwide, where they are increasingly exposed to ocean acidification (OA). Efficient nitrogen (N) cycling uptake essential maintain plant productivity, but the effects of OA on N transformations these systems poorly understood. Here we show that complete occurs leaves Mediterranean seagrass Posidonia oceanica at a volcanic CO 2 vent near Ischia Island (Italy), with affecting both gain loss while...
Coral holobionts (i.e., coral-algal-prokaryote symbioses) exhibit dissimilar thermal sensitivities that may determine which coral species will adapt to global warming. Nonetheless, studies simultaneously investigating the effects of warming on all holobiont members are lacking. Here we show exposure increased temperature affects key physiological traits (herein: animal host, zooxanthellae and diazotrophs) both Stylophora pistillata Acropora hemprichii during after stress. S. experienced...
Abstract Mangrove forests are among the most productive and diverse ecosystems on planet, despite limited nitrogen (N) availability. Under such conditions, animal-microbe associations (holobionts) often key to ecosystem functioning. Here, we investigated role of fiddler crabs their carapace-associated microbial biofilm as hotspots N transformations sources within mangrove ecosystem. 16S rRNA gene metagenomic sequencing provided evidence a dominated by Cyanobacteria, Alphaproteobacteria,...
In the Mediterranean Sea, demosponge Chondrilla nucula can occur in close association with native seagrass Posidonia oceanica. C. harbors a diverse and abundant microbial community, including potential nitrifiers. Thus, sponge may contribute to nitrogen (N) demand of holobiont. this study, we investigated nitrification rates (PNR) inorganic N fluxes within at site where covered 18 ± 3 % meadow area, during plant growth (spring) senescence (autumn). Using incubation experiments 15 N-labeled...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 519:141-152 (2015) - DOI: https://doi.org/10.3354/meps11091 Seasonal variation in dinitrogen fixation and oxygen fluxes associated with two dominant zooxanthellate soft corals from northern Red Sea Vanessa N. Bednarz1,*, Ulisse Cardini1, Nanne van Hoytema1, Mamoon M. D. Al-Rshaidat2,3, Christian Wild1,4...
SPECIALTY GRAND CHALLENGE article Front. Ecol. Evol., 06 January 2022Sec. Coevolution Volume 9 - 2021 | https://doi.org/10.3389/fevo.2021.618251
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 511:297-302 (2014) - DOI: https://doi.org/10.3354/meps10912 NOTE Ocean acidification rapidly reduces dinitrogen fixation associated with hermatypic coral Seriatopora hystrix Nils Rädecker1,2*, Friedrich W. Meyer1, Vanessa N. Bednarz1, Ulisse Cardini1, Christian Wild1,2 1Leibniz Center for Tropical (ZMT),...
Abstract Sea‐level rise is predicted to cause major damage tropical coastlines. While coral reefs can act as natural barriers for ocean waves, their protection hinges on the ability of scleractinian corals produce enough calcium carbonate (CaCO 3 ) keep up with rising sea levels. As a consequence intensifying disturbances, communities are changing rapidly, potentially reducing community‐level CaCO production. By combining colony‐level physiology and long‐term monitoring data, we show that...
Abstract The tropical seagrass Halophila stipulacea exhibits a limited capacity to use nitrate, but has high uptake and efficiency for ammonium. Consequently, N 2 fixation by associated diazotrophic epiphytes may be important in providing ammonium needed photosynthesis growth. When exposed seasonality, this association could provide competitive advantage H. relation other species, related knowledge is scarce. Here, we thus report measurements of net (O fluxes) (acetylene reduction) with from...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 533:79-92 (2015) - DOI: https://doi.org/10.3354/meps11383 Seasonality in dinitrogen fixation and primary productivity by coral reef framework substrates from northern Red Sea Laura Rix1,*, Vanessa N. Bednarz1, Ulisse Cardini1, Nanne van Hoytema1, Fuad A. Al-Horani2, Christian Wild1,3, Malik S. Naumann1 1Coral...
In many seagrass sediments, lucinid bivalves and their sulfur-oxidizing symbionts are thought to underpin key ecosystem functions, but little is known about role in nutrient cycles, particularly nitrogen. We used natural stable isotopes, elemental analyses, isotope probing study the ecological stoichiometry of a symbiosis spring fall. Chemoautotrophy appeared dominate fall, when chemoautotrophic carbon fixation rates were up one order magnitude higher as compared with spring, suggesting...
Bivalves are ubiquitous filter-feeders able to alter ecosystems functions. Their impact on nitrogen (N) cycling is commonly related their filter-feeding activity, biodeposition, and excretion. A so far understudied linked the metabolism of associated microbiome that together with host constitute mussel’s holobiont. Here we investigated how colonies invasive zebra mussel ( Dreissena polymorpha ) benthic N in shallow water sediment largest European lagoon (the Curonian Lagoon). set incubations...
Abstract Ocean Acidification (OA), due to rising atmospheric CO 2 , can affect the seagrass holobiont by changing plant's ecophysiology and composition functioning of its epiphytic community. However, our knowledge role epiphytes in productivity response environmental changes is still very limited. vents off Ischia Island (Italy) naturally reduce seawater pH, allowing investigate adaptation Posidonia oceanica L. (Delile) OA. Here, we analyzed percent cover different groups biomass P. leaves,...
The combination of biogeochemical methods and molecular techniques has the potential to uncover black-box nitrogen (N) cycle in bioturbated sediments. Advanced allow quantification process rates different microbial processes, whereas tools analysis diversity (16S rRNA metabarcoding) activity (marker genes transcripts) hot-spots such as burrow wall or macrofauna guts. By combining techniques, we analyzed role tube-dwelling Chironomus plumosus (Insecta, Diptera) larvae on nitrification nitrate...
Abstract Sediment macrofauna play a vital role in sustaining aquatic food webs and biogeochemical cycles. Previous research demonstrated that bioturbation indirectly affects methane (CH 4 ) dynamics through mobilization of porewater alteration microbial processes the surrounding sediment. However, little is known on direct contribution holobionts (the assemblage invertebrate host associated microbiome) to fluxes. Here, we investigated how 19 taxa holobionts, from different estuarine habitats...