Danna Titelboim

Danna Titelboim

Postdoctoral Research Assistant in Palaeoclimatology

My research explores the effects of environmental changes on calcifying organisms that are critical as marine ecosystem engineers and regulators of the global carbon cycle.

I focus on two major groups of calcifying organisms: coccolithophores and Large Benthic Foraminifera (LBF). Coccolithophores are considered to be the most prominent carbonate producer in the ocean and also contribute about 50% of global primary production. LBF are major calcifiers in reef and other shallow marine environments. This group is usually characterised by algal symbiosis, making them contributors to primary production in tropical to subtropical areas. Understanding the response of these organisms is imperative as their ability to calcify and photosynthesis have major biogeochemical implications.

An important mechanism that allows organisms to cope with rapid climate or local environmental changes is physiological plasticity both within ontogenetic development and across generations. Transgenerational plasticity is specifically relevant when trying to understand the possible impacts of climate change since these anthropogenic changes will persist across generations. Hence, one of the main challenges of studying future effects on organisms is evaluating their adaptation potential through short laboratory experiments. To overcome this challenge, I conduct multigenerational laboratory experiments simulating adaptation under future warming scenarios and estimate predicted changes in calcification and photosynthesis. These results will indicate how adaptation will mitigate the response of coccolithophores and LBF to ocean warming and provide a realistic prediction of the biological effect of the organic pump versus the carbonate counter pump on oceanic pCO2.

Titelboim, D., Lord, O., Schmidt, (2021) Thermal stress reduces carbonate production of benthic foraminifera and changes the material properties of their shells. ICES Journal of Marine Science, fsab186.


Titelboim, D., Thangarjan, S., Raposo, D., Morard, R., Kucera, M., Ashckenazi-Polivoda, S., Almogi-Labin, A., Herut, B., Manda, S., Abramovich, S., Gold, D., Abdu, U. (2021) The transcriptomic signature of cold and heat stress in benthic foraminifera : Implications for range expansions of marine calcifiers. Functional ecology, https://doi.org/10.1111/1365-2435.13929.


Titelboim, D., Almogi-Labin, A., Herut, B., Kucera, M., Asckenazi-Polivoda, S., Abramovich, S. (2019) Thermal tolerance and range expansion of invasive foraminifera under climate changes. Scientific Reports, 9, 4198.


Titelboim, D., Sadekov, A., Almogi-Labin, A., Herut, B., Kucera, M., Schmidt, C., Hyams-Kaphzan, O., Abramovich, S. (2017) Geochemical signatures of benthic foraminiferal shells from a heat-polluted shallow marine environment provide field evidence for growth and calcification under extreme warmth. Global Change Biology, 2017;00:1-8.


Titelboim, D,. Almogi-Labin, A., Herut, B., Kucera, M., Schmidt, C., Hyams – Kaphzan, O., Ovadia, O., Abramovich, S. (2016) Selective responses of benthic foraminifera to thermal pollution. Marine Pollution Bulletin, 105, 324-336.

Hoober, L., Titelboim, D., Abramovich, S., Herut, B., Teutsch, N., Benaltabet, T., & Torfstein, A. (2022). Establishing Baseline Assessment Levels for Monitoring Coastal Heavy Metals Using Foraminiferal Shells: A Case Study from the Southeastern Mediterranean. Water 14(10), 1532.


Kenigsberg, C., Titelboim, D., Ashckenazi-Polivoda, S., Herut, B., Almogi-Labin, A., Kucera, M., Hyams-Kaphzan, O., Zukerman, Y., Abramovich, S. (2022) The combined effects of rising temperature and salinity may halt the future proliferation of symbiont-bearing foraminifera as ecosystem engineers. Science of The Total Environment, 806, 150581.


Tadir, R., Shneor, N., Abramovich, S., Titelboim, D., & Ashckenazi-Polivoda, S. (2021) Unravelling the evolution of extraordinary long-range planktonic foraminifera species based on image processing analysis. Marine Micropaleontology, 102015.


Titelboim, D., Sadekov, A., Blumenfeld, M., Almogi-Labin, A., Herut, B., Halicz, L., Benaltabet, T., Torfstein, A., Kucera, M., Abramovich, S. (2021) Monitoring of heavy metals in seawater using single chamber foraminiferal sclerochronology. Ecological Indicators, 120, 106931.


*Manda, S., *Titelboim, D., Ashckenazi-Polivoda, S., Almogi-Labin, A., Herut, B., Abramovich, S. (2020). Epiphytic benthic foraminiferal preferences for macroalgal habitats: Implications for coastal warming. Marine Environmental Research, 161, 105084. *Equal contribution


Pinko, D., Abramovich, S., Titelboim, D. (2020) Foraminiferal holobiont thermal tolerance under future warming–roommate problems or successful collaboration?. Biogeosciences, 17(8).


Remmelzwaal, S., Sadekov, A., Parkinson, I., Schmidt, D., Titelboim, D., Abramovich, S., Roepert, A., Kienhuis, M., Polerecky, L., Goring-Harford, H., Kimoto, K., Allen, KA., Holland, K., Stewart, J., Middleburg, J. (2019) Post-depositional overprinting of chromium in foraminifera. Earth and Planetary Science Letters, 515 (2019): 100-111.


Titelboim, D., Sadekov, A., Hyams-Kaphzan, O., Almogi-Labin, A., Herut, B., Kucera, M., Abramovich, S. (2018) Foraminiferal single chamber analyses of heavy metals as a tool for monitoring permanent and short term anthropogenic footprints. Marine Pollution Bulletin, 128, 65–71.


Ashckenazi-Polivoda, S., Titelboim, D., Meilijson, A., Almogi-Labin A., Abramovich S. (2017) Bathymetric trend of Late Cretaceous southern Tethys upwelling regime based on benthic foraminifera. Cretaceous Research, 82, 40-45.


Schmidt, C., Titelboim, D., Brandt, J., Herut, B., Abramovich, S., Almogi-Labin, A., Kucera, M. (2016) Extremely heat tolerant photo-symbiosis in a shallow marine benthic foraminifera. Scientific Reports, 6, 30930.


Merkado, G., Titelboim, D., Hyams-Kaphzan, O.,Holzmann, M., Pawlowski, J., Almogi-Labin, A., Abdu, U., Herut, B., Abramovich, S. (2015) Molecular phylogeny and ecology of Textularia agglutinans d’Orbigny from the Mediterranean coast of Israel: A case of a successful new incumbent. PloS one, 10(11), e0142263.


Schmidt, C., Morard, R., Almogi-Labin, A., Weinmann, A. E., Titelboim, D., Abramovich, S., Kucera, M. (2015) Recent Invasion of the Symbiont-Bearing Foraminifera Pararotalia into the Eastern Mediterranean Facilitated by the ongoing Warming Trend. PloS one, 10(8), e0132917.