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Caltech
Tejada Lab

We seek to improve understanding of the origins and evolution of life, as well as broad ecological and evolutionary processes, from both ecosystem- and organismal-level perspectives. Since most life forms that have ever existed are now extinct, the fossil record is essential for answering deep-time evolutionary questions and understanding modern biodiversity. To address these questions, we integrate experimental approaches, advanced isotope ratio mass-spectrometry, and field-based research. Drawing on diverse disciplines—including paleontology, stable isotope geochemistry, geology, and phylogenetics—we focus on the following research areas:

(1) The role of diet as a selective force driving the evolution of phenotypes, genotypes, and ecosystems.

(2) A mechanistic understanding of the physiological processes underlying the isotopic variation observed across organisms.

(3) Development of methods for measuring stable isotope ratios of organic compounds from trace quantities

(4) The impact of climate extremes on the Amazon ecosystem sensitivity.

Our lab thrives on a multidisciplinary approach, continuously evolving and exploring new research directions. We therefore welcome talented individuals from diverse backgrounds who are interested in pursuing research opportunities or initiating collaborations.