Coral bleaching occurs when environmental stress induces breakdown of the coral-algae symbiosis and host initiates algae expulsion. Two types coral had been thoroughly discussed in scientific literature; first is primarily associated with mass events; second a seasonal loss and/or pigments. Here, we describe phenomenon that has witnessed for repeated summers mesophotic zone (40–63 m) northern Red Sea: recovery several hermatypic species. In this study, followed recurring process common...

Energy sources of corals, ultimately sunlight and plankton availability, change dramatically from shallow to mesophotic (30–150 m) reefs. Depth-generalist those that occupy both these two distinct ecosystems, are adapted cope with such extremely diverse conditions. In this study, we investigated the trophic strategy depth-generalist hermatypic coral Stylophora pistillata ability colonies adapt We compared symbiont genera composition, photosynthetic traits holobiont position carbon sources,...

The association between corals and photosynthetic dinoflagellates is one of the most well-known nutritional symbioses, but nowadays it threatened by global changes. Nutritional exchanges are critical to understanding performance this symbiosis under stress conditions. Here, compound-specific δ15N δ13C values amino acids (δ15NAA δ13CAA) were assessed in autotrophic, mixotrophic heterotrophic holobionts as diagnostic tools follow interactions partners. Contrary what was expected, heterotrophy...

Bacterial diseases of marine fish inflict significant economic damage to fisheries and aquaculture pose an increasing risk public health. When addressing disease, accumulating body research suggests adding another factor the classic epidemiological triangle host-environment-pathogen: microbiome. The gills, being a gateway into bearing important role in homeostasis, have been found be proxy gut microbiota as well reflecting microbial communities surrounding water. In this study, 16S rRNA...

Abstract Lionfishes (Pterois spp.), originally native to the Indo-Pacific and Red Sea, have become one of most invasive marine species globally, including recent establishment in Mediterranean Sea. This study investigates microbiota lionfish explore its potential role their invasion success establishment. Using high-throughput sequencing analyses, we characterized species-specific core microbiome identified habitat-specific markers across different regions (Red Caribbean, aquarium...

Lionfishes (Pterois spp.), originally native to the Indo-Pacific and Red Sea, have become one of most invasive marine species globally, including recent establishment in Mediterranean Sea. This study investigates microbiota lionfish explore its potential role their invasion success establishment. Using high-throughput sequencing analyses, we characterized species-specific core microbiome identified habitat-specific markers across different regions (Red Caribbean, aquarium populations)...

During the 2011 exploration season of EV Nautilus in Mediterranean Sea, we conducted a multidisciplinary study, aimed at exploring microbial populations below sediment-water interface (SWI) hydrocarbon-rich environments Levantine basin. Two c. 1000-m-deep locations were sampled: sediments fueled by methane seepage toe Palmachim disturbance and patch euxinic sediment with high sulfide content offshore Acre, enriched hydrocarbon from an unknown source. We describe composition population top 5...

During the 2010–2011 E/V Nautilus exploration of Levantine basin's sediments at depth 300–1300 m, densely patched orange-yellow flocculent mats were observed various locations along continental margin Israel. Cores from mat and control collected by remotely operated vehicle system (ROV) team. Microscopic observation phylogenetic analysis microbial 16S 23S rRNA gene sequences indicated presence zetaproteobacterial stalk forming Mariprofundus spp. – like prokaryotes in mats. Bacterial...

SUMMARY The larvae of most coral species spend some time in the plankton, floating just below surface and hence exposed to high levels ultraviolet radiation (UVR). UVR are potentially stressful damaging DNA other cellular components, such as proteins, reducing survivorship. Consequently, mechanisms either shade (prevent) or repair damage play an important role. In this study, role photoreactivation survival planulae was examined. Photoreactivation is a light-stimulated response UV-damaged...

The three chthamalids Chthamalus stellatus , C. montagui and Euraphia depressa are common inhabitants of the intertidal zone in Eastern Atlantic, Mediterranean Sea Black Sea. In this study, we investigated occurrence these barnacles a wide range their distribution. Population divergences two species have been inferred using molecular markers — internal transcribed spacer (ITS), elongation factor 1α (EF‐1α) cytochrome oxidase subunit I (COI). ITS sequences were identical throughout range,...

Specimens of Abudefduf sp. collected in the Levantine region were previously assumed to be Lessepsian-immigrant Indo-Pacific sergeant vaigiensis (Quoy and Gaimard, 1825). Using phylogenetic analysis mitochondrial genes cytochrome c oxidase I (COI) 16S rRNA probed 10 individuals sampled Mediterranean Israel on Red Sea, we established that Atlantic-origin major saxatilis (Linnaeus, 1758) now occurs along eastern shallow coastal rocky habitats. This study showed misidentifications resulting...

Polyps in different locations on individual stony coral colonies experience variation numerous environmental conditions including flow and light, potentially leading to transcriptional physiological differences across the colony. Here, we describe high-resolution tissue skeleton measurements differential gene expression from multiple within a single colony of Stylophora pistillata , aiming relate these gradients We observed broad responses both host photosymbiont response height above...

Synechocystis sp. PCC6803 actively uptake inorganic carbon to elevate the dioxide concentration around their Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) enzyme. The mechanism is comprised of a set enzymatic complexes which act in an orchestrated manner transfer extracellular dissolved into cell and concentrate it within specialized compartment. NADPH dehydrogenase-1 first operational super-complex light conditions and, therefore, allows direct estimation flux cell, albeit...

As impacts on the Mediterranean Sea are expected to grow in future, especially with climate change, habitat degradation, and displacement of native species by non-indigenous (NIS), investigation significant alterations trophic levels this diverse marine is important. Analysis stable isotopes from targeted consumers has previously been shown reliably reflect that primary producers, thus enabling us describe highlight potential shifts food web a particular ecosystem. In study, we used δ 13 C...

The blackchin guitarfish Glaucostegus cemiculus has suffered severe declines and regional extirpation throughout its known distributions. While this species relative, the common Rhinobatos rhinobatos , have been described in Mediterranean Sea with co-occurring habitat ranges, no research recorded existence or extent of these two separate populations along Israeli coastal waters. Along a particular coast Israel, Ma’agan Michael, fishermen reported annual observations juvenile between June to...

Amino acids compound-specific nitrogen stable isotope analysis (AA-CSIA) is an emerging tool in ecology for understanding trophic system dynamics. While it has been successfully used several independent studies across a range of environments and study locations, researchers have encountered calculation issues determining position values. Most introduce modifications to the constants equation calculations, but then fail account variations when comparing separate research studies. The broad...

Chemical thinning of apple fruitlets is an important practice as it reduces the natural fruit load and, therefore, increases size final for commercial markets. In apples, one chemical thinner used Metamitron, which sold product Brevis® (Adama, Ashdod, Israel). This inhibits electron transfer between Photosystem II and Quinone-b within light reactions photosynthesis. this study, we investigated responses two cultivars—Golden Delicious Top Red—and photosynthetic after administration Brevis®....

Abstract Since the beginning of 21st century, Mediterranean shores Israel have experienced invasions several alien Indo-Pacific seaweed species. This phenomenon has been observed mainly on northern Israeli shore, particularly near port Haifa. Here we report and discuss first record common Codium arabicum from Sea, namely, Levant coast Israel. macroalga was identified morphologically, determination later confirmed by molecular techniques using two plastid DNA sequences: rbc L exon 1 rps 3-...

The species of Aequorea attract much scientific interest as they contain the unique Green Fluorescent Protein (GFP). In this work we describe for first time discovery a hydrozoan jellyfish belonging to genus from Israeli eastern Mediterranean that contains and exhibits fluorescent protein. Finding macrodactyla (Brandt, 1835) in indicates changes are occurring gelatinous fauna area. This hydromedusa is known seas adjoining though most its records more than four decades old. We examined...