Overview
Nicolas Cassar's research focuses on environmental biogeochemistry and physiology, with the objective of constraining the mechanisms governing carbon cycling and climate. Current research interests include ocean carbon cycles and productivity; carbon acquisition mechanisms in marine phytoplankton and implications for climate change and paleo-CO2 reconstruction; and global carbon cycle and ocean-atmosphere fluxes. His scientific approach is interdisciplinary, integrating field observations, laboratory experiments, modeling and theory.
Current Appointments & Affiliations
Lee Hill Snowdon Professor of Biogeochemistry
·
2025 - Present
Earth and Climate Sciences,
Nicholas School of the Environment
Professor of Biogeochemistry
·
2019 - Present
Earth and Climate Sciences,
Nicholas School of the Environment
Recent Publications
Influence of Ni-related enzymes on the Ni cycle in the Southern Ocean: insights from isotopes and metagenomics
Preprint · January 19, 2026 Full text CiteSupplementary material to "Influence of Ni-related enzymes on the Ni cycle in the Southern Ocean: insights from isotopes and metagenomics"
Other · January 19, 2026 Full text CiteEvidence of limited N2 fixation in the Southern Ocean
Journal Article Communications Earth and Environment · December 1, 2025 Biological nitrogen fixation is an important source of new nitrogen, influencing ocean fertility and carbon uptake. While recently documented in Arctic waters, its role in the Southern Ocean remains uncertain. We measured nitrogen fixation along the Wester ... Full text CiteRecent Grants
Nutrition as a BOOST for corals in the face of marine heat waves
ResearchPrincipal Investigator · Awarded by Institut de Recherche pour le Developpement · 2025 - 2027Response of Nitrogen Fixation in Lichens and Mosses to a Rapidly Changing Arctic Environment
ResearchPrincipal Investigator · Awarded by Army Research Office · 2023 - 2027Underwater coded aperture miniature mass spectrometer (UW-CAMMS)
ResearchCo-Principal Investigator · Awarded by National Science Foundation · 2021 - 2026View All Grants
Education, Training & Certifications
University of Hawaii, Manoa ·
2003
Ph.D.
McGill University (Canada) ·
1997
B.S.