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  1. Jan 2023 Journal Article Cretaceous Research

    Trends in organic matter deposition in the Cretaceous of the eastern Mediterranean: Revisiting and updating the chronology and facies of the Eratosthenes Seamount deposits

    Aaron Meilijson, Sarit Ashckenazi-Polivoda, Giovanni Coletti, Josh Steinberg, Yizhaq Makovsky
    Abstract

    In this study we revisited the Cretaceous of the Eratosthenes Seamount (ESM) from IODP LEG 160 Hole 967E, updating the chronology, depositional environment, and paleobathymetry of the ESM. Our goal was also to address the spatio-temporal distribution of organic matter and, by comparison with the eastern margins of the Levant Basin, discuss basin-wide controls on its

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  2. 1 Feb 2022 Journal Article Science of The Total Environment

    The combined effects of rising temperature and salinity may halt the future proliferation of symbiont-bearing foraminifera as ecosystem engineers

    Chen Kenigsberg, Danna Titelboim, Sarit Ashckenazi-Polivoda, Barak Herut, Michal Kucera, Yuval Zukerman, Orit Hyams-Kaphzan, Ahuva Almogi-Labin, Sigal Abramovich
    Abstract

    Rising sea surface temperatures and extreme heat waves are affecting symbiont-bearing tropical calcifiers such as corals and Large Benthic Foraminifera (LBF). In many ecosystems, parallel to warming, global change unleashes a host of additional changes to the marine environment, and the combined effect of such multiple stressors may be far greater than those of temperature

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  3. Dec 2021 Journal Article Functional Ecology

    The transcriptomic signature of cold and heat stress in benthic foraminifera—Implications for range expansions of marine calcifiers

    Danna Titelboim, Starlin Thangarjan, Débora Raposo, Raphael Morard, Michal Kucera, Sarit Ashckenazi-Polivoda, Ahuva Almogi-Labin, Barak Herut, Sneha Titelboim Danna Ashckenazi-Polivoda Manda, Sigal Abramovich, David A Gold, Uri Titelboim Danna Morard Abdu
    Abstract

    Global warming permits range expansions of tropical marine species into mid-latitude habitats, where they are, however, faced with cold winter temperatures. Therefore, tolerance to cold temperatures may be the key adaptation controlling zonal range expansion in tropical marine species. Here we investigated the molecular and physiological response to cold and heat stress

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  4. Jun 2021 Journal Article Marine Micropaleontology

    Unravelling the evolution of extraordinary long-range planktonic foraminifera species based on image processing analysis

    Roni Tadir, Nimrod Shneor, Sigal Abramovich, Danna Titelboim, Sarit Ashckenazi-Polivoda
    Abstract

    The recent growing interest in Late Cretaceous biserial planktonic foraminifera (heterohelicids) has greatly enhanced their use as paleoceanographic and biostratigraphic markers. Pseudotextularia nuttalli, one of the most common cosmopolitan planktonic foraminifera, has an exceptionally long evolutionary range (Turonian-Maastrichtian). The image processing procedure we

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  5. Jan 2021 Journal Article Global and Planetary Change

    Resilience of primary and export productivity in a eutrophic ecosystem following the Cretaceous-Paleogene mass extinction

    Yoav O Rosenberg, Sarit Ashckenazi-Polivoda, Sigal Abramovich, Nicolas Thibault, Shamar Chin, Shimon Feinstein, Yuval Bartov, Alon Amrani
    Abstract

    The recovery time of marine productivity following the Cretaceous-Paleogene (KPg) mass extinction varies tremendously with location (hundreds to millions of years), with possible delays in the tropics as compared to higher latitudes. This heterogeneity is based on prevalent oligo- to mesotrophic marine environments. While highly productive eutrophic environments are

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  6. Nov 2020 Journal Article Global and Planetary Change

    Mercury linked to Deccan Traps volcanism, climate change and the end-Cretaceous mass extinction

    Gerta Keller, Paula Mateo, Johannes Monkenbusch, Nicolas Thibault, Jahnavi Punekar, Jorge E Spangenberg, Sigal Abramovich, Sarit Ashckenazi-Polivoda, Blair Schoene, Michael P Eddy, Kyle M Samperton, Syed F R Khadri, ... show all 13 authors
    Abstract

    Mercury (Hg) anomalies linked to Large Igneous Provinces (LIP) volcanism have been identified in sediments across all five major mass extinctions in Earth's history. This study tests whether Hg in marine sediments is a reliable proxy linking Deccan Traps volcanic eruptions to late Maastrichtian global climate warming and the mass extinction at the Cretaceous-Paleogene

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  7. Oct 2020 Journal Article Marine Environmental Research

    Epiphytic benthic foraminiferal preferences for macroalgal habitats: Implications for coastal warming

    Sneha Titelboim Danna Ashckenazi-Polivoda Manda, Danna Titelboim, Sarit Ashckenazi-Polivoda, Ahuva Almogi-Labin, Barak Herut, Sigal Abramovich
    Abstract

    Considering the thermal limits of coastal macroalgae habitats in the South-Eastern Mediterranean, it is important to study the response of the associated meiofauna to better understand the expected feedback of ecosystems to future warming. In this study, we compared benthic foraminiferal assemblages from two common macroalgal habitats, Turf and Coralline algae, based

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  8. 24 Jul 2020 Book Chapter Morphogenesis, Environmental Stress and Reverse Evolution

    Fossil Benthic Foraminifera Morphologic Adaptation (Kleptoplastidy) Within Low-Oxygen-Bottom Water Environments, Coupled with Geochemical Insights from the Late Cretaceous in the Levant Basin

    Aaron Meilijson, Sarit Ashckenazi-Polivoda, Peter Illner
    Abstract

    Following a multi-proxy analysis of the Upper Cretaceous high-productivity sequence from proximal and distal basins in Israel, Meilijson et al. (Paleobiology 42:77–97, 2016) provided evidence indicating that different benthic foraminifera species could survive and sustain large populations under long-term anoxic to dysoxic bottom water conditions. They proposed that

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  9. Sep 2019 Journal Article Geoheritage

    Extraordinary Geodiversity and Geoheritage Value of Erosional Craters of the Negev Craterland

    Abstract

    The Negev desert features numerous unique geologic phenomena, the most prominent being crater-like valleys which have formed in a complex erosional process. These erosional craters expose a large variety of ancient rocks and geologic phenomena that reveal details of a rich geologic history. The unique conditions within the erosional craters provide shelter for endemic

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  10. Aug 2018 Journal Article Marine and Petroleum Geology

    From phytoplankton to oil shale reservoirs: A 19-million-year record of the Late Cretaceous Tethyan upwelling regime in the Levant Basin

    Aaron Meilijson, Sarit Ashckenazi-Polivoda, Peter Illner, Robert P Speijer, Ahuva Almogi-Labin, Shimon Feinstein, Wilhelm Püttmann, Sigal Abramovich
    Abstract

    The complexity of sedimentary organic-matter formation, its source to burial, and influence on bottom-water communities are addressed in this study of the 19 million years-long Upper Cretaceous Tethyan upwelling regime in the Levant. A multi-proxy approach is amalgamated into a model through which the paleoceanographic complexity of an intense and long-lasting upwelling

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