A5085396512- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Isotope Analysis in Ecology
- Microbial Community Ecology and Physiology
- Geology and Paleoclimatology Research
- Maritime and Coastal Archaeology
- Mercury impact and mitigation studies
- Marine Bivalve and Aquaculture Studies
- Marine Ecology and Invasive Species
- Marine and environmental studies
- Ocean Acidification Effects and Responses
- Methane Hydrates and Related Phenomena
- Ichthyology and Marine Biology
- Archaeology and ancient environmental studies
- Coral and Marine Ecosystems Studies
- Marine animal studies overview
- Oceanographic and Atmospheric Processes
- Marine Invertebrate Physiology and Ecology
- Cephalopods and Marine Biology
- Oil Spill Detection and Mitigation
- Marine and fisheries research
- Physiological and biochemical adaptations
- Aquatic Ecosystems and Phytoplankton Dynamics
- Forensic Anthropology and Bioarchaeology Studies
- Groundwater and Isotope Geochemistry
Israel Oceanographic and Limnological Research
2017-2025
University of Göttingen
2016-2019
University of Haifa
2015-2017
Weizmann Institute of Science
2009-2016
Diet is a crucial trait of an animal's lifestyle and ecology. The trophic level organism indicates its functional position within ecosystem holds significance for ecology evolution. Here, we demonstrate the use zinc isotopes (δ66Zn) to geochemically assess in diverse extant extinct sharks, including Neogene megatooth shark (Otodus megalodon) great white (Carcharodon carcharias). We reveal that dietary δ66Zn signatures are preserved fossil tooth enameloid over deep geologic time robust...
Seawater reverse osmosis (SWRO) desalination facilities produce freshwater and, at the same time, discharge hypersaline brine that often includes various chemical additives such as antiscalants and coagulants. This dense can sink to sea bottom creep over seabed, reaching up 5 km from point. Previous reviews have discussed effects of SWRO on marine ecosystems, yet little attention has been paid impacts benthic habitats. review comprehensibly discusses fauna flora. We previous studies...
Mesopelagic prokaryotes (archaea and bacteria), which are transported together with nutrient-rich intermediate-water to the surface layer by deep convection in oceans (e.g., winter mixing, upwelling systems), can interact microbial populations. This interaction potentially affect production rates biomass of populations, thus play an important role marine carbon cycle oceanic sequestration. The Eastern Mediterranean Sea (EMS) is one most oligotrophic warm systems world's oceans, usually very...
Long-term trends in oxygen, salinity, and nutrients were followed the Southeastern Mediterranean (SEMS) deep waters from 2002 to 2020. Results show a net decrease oxygen since 2008 of −0.5 ± 0.1 μmol kg −1 yr bathypelagic depths (1,200–2,000 m). Multiannual variability levels superimposed this trend, is likely associated with variations thermohaline fluxes. The 2020 mean concentration 179.5 2.3 comparable pre-Eastern Transient (EMT) value. post-EMT signature clearly demonstrated both...
Abstract. Planktonic food webs were studied contemporaneously in a mesoscale cyclonic (upwelling, ∼ 13 months old) and an anticyclonic (downwelling, 2 eddy as well uninfluenced background situation the oligotrophic southeastern Mediterranean Sea (SEMS) during late summer 2018. We show that integrated nutrient concentrations higher cyclone compared to anticyclone or stations by 2–13-fold. Concurrently, Synechococcus Prochlorococcus dominant autotrophs abundance-wise (∼ 300 × 1010 cells m−2)....
Deep-sea anoxic brine pools are unique and extreme, yet habitable environments. However, their extent processes of formation not fully understood. Using geophysical analysis seafloor surveying, we discovered the eastmost known in ultraoligotrophic Eastern Mediterranean Sea, at Palmahim Disturbance offshore Israel (~1150 m water depth). These located directly above a ~1km wide piece Messinian evaporites section, which was up thrusted to ~350 below seafloor. We sampled brines short cores...
Abstract. Hydrocarbon seepage at the deep seafloor fuels flourishing chemosynthetic communities. These seeps impact functionality of benthic ecosystem beyond hotspots gas emission, altering abundance, diversity, and activity microbiota fauna affecting geochemical processes. However, these ecotones (chemotones) are far less explored than foci seepage. To better understand chemotones, we (i) mapped seabed morphology periphery in eastern Mediterranean Sea, using video analyses synthetic...
Abstract The Mediterranean region is a climatic transitional zone between the subtropical/monsoon regime and temperate westerlies subject to forces acting upon global climate system. Much knowledge about its over last millennium derived from terrestrial records, whereas changes in sea surface temperatures (SSTs) dissolved inorganic carbon pool (DIC) are poorly known. We present continuous high‐resolution reconstructions of SST δ 13 C DIC eastern (EM) Sea, as inferred oxygen isotope records...
Phytoplankton and heterotrophic bacteria rely on a suite of inorganic organic macronutrients to satisfy their cellular needs. Here, we explored the effect dissolved phosphate (PO4) several molecules containing phosphorus [ATP, glucose-6-phosphate, 2-aminoethylphosphonic acid, collectively referred as (DOP)], activity biomass autotrophic microbial populations in coastal water southeastern Mediterranean Sea (SEMS) during summertime. To this end, surface waters were supplemented with PO4, one...
Abstract Benthic microbes are key organisms in the oligotrophic Southeastern Mediterranean Sea (SEMS), yet their abundance, activity, and diversity this rapidly changing basin not fully understood. We investigated prokaryotic microfungal communities throughout years 2018–2020 at 27 stations (6–1900 m water depths, down to 20 cm below sediment surface), two transects with distinct downslope transport regimes, along eutrophic coastline. estimated microbial abundance flow cytometry, secondary...
Skeletal remains in archaeological strata are often assumed to be of similar ages. Here we show that combined Sr and O isotope analyses can serve as a powerful tool for assessing fish provenance even identifying fossil teeth contexts. For this purpose, established reference dataset extant from major water bodies the Southern Levant. Fossil shark were identified within Iron Age cultural layers dating 8–9th century BCE City David, Jerusalem, although reason their presence unclear. Their...
Abstract The oceans play a major role in the earth’s climate by regulating atmospheric CO 2 . While oceanic primary productivity and organic carbon burial sequesters from atmosphere, precipitation of CaCO 3 sea returns to atmosphere. Abiotic form aragonite is potentially an important feedback mechanism for global cycle, but this process has not been fully quantified. In sediment-trap study conducted southeastern Mediterranean Sea, one fastest warming most oligotrophic regions ocean, we...
Abstract The isotope ratios of zinc ( 66 Zn/ 64 Zn expressed as δ Zn), a vital nutrient, increasingly demonstrate trophic discrimination among vertebrates, making valuable dietary proxy for ecological, archaeological, and palaeontological studies. Given the novelty methodology, tissue-diet tissue-tissue fractionation factors remain poorly understood have so far only been studied in few terrestrial mammals. Here, we investigate compositions enameloid, bone, white muscle seven artificially-fed...
Abstract. Over the past several decades, jellyfish blooms have intensified spatially and temporally, affecting functions services of ecosystems worldwide. At demise a bloom, an enormous amount biomass sinks to seabed decomposes. This process entails reciprocal microbial biogeochemical changes, typically enriching water column with large amounts organic inorganic nutrients. Jellyfish decomposition was hypothesized be particularly important in nutrient-impoverished ecosystems, such as Eastern...