A5046261932- Microbial Community Ecology and Physiology
- Photosynthetic Processes and Mechanisms
- Algal biology and biofuel production
- Bacteriophages and microbial interactions
- Aquatic Ecosystems and Phytoplankton Dynamics
- Genomics and Phylogenetic Studies
- Microbial Fuel Cells and Bioremediation
- Geochemistry and Elemental Analysis
- Biocrusts and Microbial Ecology
- Heavy metals in environment
- Marine and coastal ecosystems
- Pharmaceutical and Antibiotic Environmental Impacts
- Microplastics and Plastic Pollution
- Plant Stress Responses and Tolerance
- Environmental Toxicology and Ecotoxicology
- Environmental DNA in Biodiversity Studies
- Marine Biology and Environmental Chemistry
- Connective Tissue Growth Factor Research
- Mercury impact and mitigation studies
- Iron oxide chemistry and applications
Bar-Ilan University
2022-2025
Rutgers, The State University of New Jersey
2019-2025
Rutgers Sexual and Reproductive Health and Rights
2021
Hebrew University of Jerusalem
2011-2016
Interuniversity Institute for Marine Sciences in Eilat
2011-2016
Molina Center for Energy and the Environment
2012
Summary In many aquatic environments the essential micronutrient iron is predominantly complexed by a heterogeneous pool of strong organic chelators. Research on uptake mechanisms cyanobacteria inhabiting these has focused endogenous siderophore production and internalization. However, as cyanobacterial species do not produce siderophores, alternative Fe acquisition must exist. Here we present study pathways in unicellular, planktonic, non‐siderophore producing strain Synechocystis sp. PCC...
In this contribution, we address the question of iron bioavailability to cyanobacteria by measuring Fe uptake rates and probing for a reductive pathway in diverse cyanobacterial species. We examined three Fe-substrates: dissolved inorganic (Fe') Fe-siderophores Ferrioxamine B (FOB) FeAerobactin (FeAB). order compare across substrates strains, extracted rate constants (kin = rate/[Fe-substrate]). Fe' was most bioavailable form cyanobacteria, with kin values higher than those other substrates....
Summary Iron is a member of small group nutrients that limits aquatic primary production. Mechanisms for utilizing iron have to be efficient and adapted according the ecological niche. In respect acquisition cyanobacteria, prokaryotic oxygen evolving photosynthetic organisms can divided into siderophore‐ non‐siderophore‐producing strains. The results presented in this paper suggest situation far more complex. To understand bioavailability different substrates advantages various uptake...
Phytoplankton viruses facilitate the production of dissolved organic matter (DOM) through host lysis, shaping DOM composition, and subsequent regenerative processing. We explored how generated from a bloom-forming, centric diatom, infected with taxonomically distinct viruses—a single-stranded (ss) DNA ssRNA virus—impacted microbial processing matter. derived uninfected ssDNA virus–infected cultures supported growth in bacterial isolates mixed assemblage. In contrast, virus infection did not...
Abstract/Summary Diatoms are large phytoplankton that form the base of marine food web and often bloom first when nutrients injected into surface ocean through upwelling or deep mixing 1,2 . contribute 20% global photosynthesis 3 while disproportionately representing 40% carbon export 4 , with most occurring along continental margins 5 Oxylipin chemical signaling by diatoms has been extensively studied in Mediterranean Sea where oxylipins linked to grazing subsequent insidious effects on...
Marine plastic pollution poses a growing environmental threat, with microplastics accumulating in the global oceans. This study profiles seasonal dynamics and taxonomic composition of plastisphere, microplastic ecosystem, Eastern Mediterranean Sea. Using long-read 16 S 18 metabarcoding, we analyzed offshore whole seawater samples across each season over two-year period. The analysis revealed higher richness prokaryotic communities on compared to seawater, which was predominantly composed...
Iron (Fe) bioavailability, as determined by its sources, sinks, solubility and speciation, places severe environmental constraints on microorganisms in aquatic environments. Cyanobacteria are a widespread group of aquatic, photosynthetic with especially high iron requirements. While exists predominantly particulate form, little is known about bioavailability to cyanobacteria. Some cyanobacteria secrete solubilizing ligands called siderophores, yet many environmentally relevant strains do not...
<title>Abstract</title> Marine plastic pollution poses a growing environmental threat, with microplastics accumulating in the global oceans. This study profiles seasonal dynamics and taxonomic composition of plastisphere, microplastic ecosystem, Eastern Mediterranean Sea. Using long-read 16S 18S metabarcoding, we analyzed offshore whole seawater samples across each season over two-year period. The analysis revealed higher richness prokaryotic communities on compared to seawater, which was...