Chana Kranzler
Krill Prize 2025
Bar-Ilan University
Chana Kranzler
Affiliation at the time of the award:
Bar-Ilan University
Faculty of Life Sciences
Award Citation:
“For her pioneering research uncovering the hidden interactions between viruses and phytoplankton, and for illuminating their critical role in global marine ecosystems.”
Phytoplankton are marine microorganisms responsible for approximately half of all photosynthesis on Earth. They produce the oxygen we breathe, regulate the climate, and form the foundation of the marine food web. These microorganisms are in constant interaction with their environment, responding to the availability of light and nutrients, the presence of neighboring organisms, and predation and infection by zooplankton and viruses.
Dr. Chana Kranzler investigates how changing environmental conditions influence the life cycle of phytoplankton, with a particular focus on their interactions with viruses. In her groundbreaking research, she combines laboratory experiments with oceanographic sampling expeditions, tracking natural populations of phytoplankton and viruses. Her goal is to understand when viral infection occurs, which environmental conditions promote or inhibit it, and how these interactions affect the broader ecosystem. Her findings have shown, for example, how deficiencies in iron or phosphorus can alter infection rates, thereby influencing the cycling of carbon, silica, and marine life.
Dr. Kranzler’s pioneering work not only reveals previously hidden biological mechanisms but also provides critical insights into the potential impacts of climate change on global marine ecosystems. She is regarded as an inspiring scientist whose curiosity, creativity, and systems-level perspective are advancing our understanding of the hidden forces that sustain life on Earth.