Dr. Hadar Cohen-Sadon, a Va’adia-BARD postdoc Fellow at Prof. Adina Paytan’s lab in the department of Earth and Planetary Sciences in the University of California, Santa Cruz
What is the focus of your research?
“My postdoctoral research at the University of California, Santa Cruz, in Adina Paytan’s lab investigates how environmental conditions regulate molecular pathways of organic carbon sequestration in coastal wetlands. Although these ecosystems cover only 5-8% of Earth’s surface, they store approximately 50% of the carbon preserved in marine sediments. I focus on how variations in sulfur and iron availability control the extent and timescale of organic matter stabilization. Using advanced organic geochemistry and biogeochemical approaches, my work identifies environmental conditions that maximize carbon sequestration, supporting sustainable wetland restoration and contributing to climate change mitigation.”
What got you interested in your area of research?
“I have long been fascinated by the natural environment and the ways in which Earth systems maintain balance, particularly how molecular-scale processes can drive large-scale environmental outcomes. During my doctoral research in Earth Sciences at the Hebrew University of Jerusalem, where I developed analytical methods to investigate ancient organic matter preserved in rocks and its interactions with sulfur cycling, I became increasingly interested in the mechanisms that enable organic carbon to persist in sediments over long timescales. This interest naturally evolved into a more applied research direction focused on linking fundamental geochemical processes with real-world environmental challenges.”
What are your plans after your fellowship?
“After completing my postdoctoral fellowship, I plan to continue advancing applied environmental and biogeochemical research that directly addresses challenges related to climate change and ecosystem sustainability. I am particularly interested in working at the interface between science, environmental management, and implementation, translating research findings into practical tools and strategies that support sustainability. In the longer term, I look forward to bringing this experience back to Israel and contributing to local and regional environmental initiatives.”
What tip would you give someone beginning their postdoctoral research?
“I would encourage early-career postdoctoral researchers to be bold in shaping their research aims. Take the time to define a clear core question or broader goal that excites you and gives your work direction. At the same time, seek strong mentorship and collaborations, stay open to learning new approaches, and be willing to explore new directions, as these can make the postdoctoral experience both productive and rewarding.”