Tejada, Julia main content.

Julia Tejada

julia

Ph.D. Candidate, Richard Gilder Graduate School
Ph.D. Candidate, Richard Gilder Graduate School, Columbia University

Google Scholar Profile

Education

  • Ph.D. Earth and Environmental Sciences, Columbia University & Comparative Biology Program, AMNH (expected graduation Summer 2020)
  • M.Phil. Earth and Environmental Sciences, Columbia University
  • M.A. Earth and Environmental Sciences, Columbia University
  • M.Sc. Department of Zoology, University of Florida
  • B. Sc. Department of Biological Sciences, Universidad Nacional Mayor de San Marcos, Lima, Peru

Research Interests

How have geological processes, climate change, and biotic interactions changed and shaped the structure of mammalian communities in Amazonia through time? My research addresses these questions by means of stable isotope analyses, a powerful tool to characterize ecologies and ecosystems, based on the chemical composition of animal tissues. Answering those questions, however, is hampered by long-held assumptions on how mammalian communities in tropical rainforests are structured isotopically, and the fidelity by which diet is recorded in animal tissues. By experimentally analyzing Neotropical mammals and by working in Earth’s most biodiverse continental region (western Amazonia), my research has recognized patterns of isotope transformation across taxonomic groups, and differences in the isotopic structure of mammals from analogous closed-canopy rainforests.

Publications

Tejada-Lara J.V., MacFadden, B., Bermudez, L., Rojas, G., Salas-Gismondi, R., Flynn, J. 2018. Body mass predicts isotope enrichment in herbivorous mammals. Proceedings of the Royal Academy B, 285: 20181020 

Tejada-Lara, J., Salas-Gismondi, R., Pujos, F., Baby, P., Benammi, M., Brusset, S., De Franceschi, D, Espurt, N., Urbina, M., Antoine, P.-O. 2015. Life in proto-Amazonia: middle Miocene mammals from the Fitzcarrald Arch (Peruvian Amazonia). Palaeontology, 58(2): 341-378.

Boivin, M., Ginot, S., Marivaux, L., Altamirano-Sierra, A., Pujos, F., Salas-Gismondi, R., Tejada-Lara, J.V., Antoine, P.-O. 2019. Tarsal morphology and locomotor adaptation of some late middle Eocene caviomorph rodents from Peruvian Amazonia reveal early ecological diversity. Journal of Vertebrate Paleontology, DOI: 10.1080/02724634.2018.1555164 

Assemat, A., Boivin, M., Marivaux, M., Pujos, F., Benites Palomino, A., Salas-Gismondi, R., Tejada-Lara, J., Varas-Malca, R., Negri, F., Ribeiro, A., Antoine, P.-O. New remains of caviomorph rodents from the Paleogene of Juanjui (Peruvian Amazonia): systematics, macroevolutionary implications and biostratigraphy. 2019. Geodiversitas, 41(20): 699-730

Boivin, M., Marivaux, L., Pujos, F., Salas-Gismondi, R., Tejada-Lara, J. V., Varas-Malca, R. M., & Antoine, P. O. 2018. Early Oligocene caviomorph rodents from Shapaja, Peruvian Amazonia. Palaeontographica, Abteilung A: Palaozoologie-Stratigraphie.

Boivin, M., Marivaux, L., Orliac, M., Pujos, F., Salas-Gismondi, R., Tejada-Lara, J.V., Antoine, P.-O. 2016. Late middle Eocene caviomorph rodents from Contamana, Peruvian Amazonia. Palaeontologia Electronica, 20.1.19A: 1-50.

Boivin, M., Marivaux, L., Candela, A., Orliac, M., Pujos, F., Salas-Gismondi, R., Tejada-Lara, J.V., Antoine, P.-O. 2016. Late Oligocene caviomorph rodents from Contamana, Peruvian Amazonia. Papers in Paleontology, 10.1002/spp2.1068, 41 pp.

Marivaux, L., Adnet, S., Altamirano-Sierra, A., Pujos, F., Ramdarshan, A., Salas-Gsimondi, R., Tejada-Lara, J.V., Antoine, P.-O. 2016. Dental remains of cebid platyrrhine from the earliest late Miocene of Western Amazonia, Peru: Macroevolutionary implications on the extant capuchin and marmoset lineages. American Journal of Physical Anthropology, DOI 10.1002/ajpa.23052.

Salas-Gismondi, R., Flynn, J., Baby, P., Tejada-Lara, J., Claude, J., Antoine, P.-O. 2016. A new gavialoid crocodylian from proto-Amazonian mega-wetlands reveals parallel evolutionary trends linked to longirostry in gavialoids. PLoS One, http://dx.doi.org/10.1371/journal.pone.0152453

Marivaux, L., Adnet, S., Altamirano-Sierra, A., Boivin, M., Tejada-Lara, J.V., Antoine, P.-O. 2016. Neotropics provide insights into the emergence of New World monkeys: new dental evidence from the late Oligocene of Peruvian Amazonia. Journal of Human Evolution, 97: 159-175.

Antoine, P.-O., Abello, A., Adnet, S., Altamirano, A., Baby, P., Billet, G., Boivin, M., Calderon, Y., Candela, A., Chabain, J., Corfu, F., Croft, D., Ganerod, M., Jaramillo, C., Klaus, S, Marivaux, L., Navarrete, R., Orliac, M., Parra, F., Perez, M., Pujos, F., Rage, J.-C., Ravel, A., Robinet, C., Roddaz, M., Tejada-Lara, J.V., Velez-Juarbe, J., Wesselingh, F., Salas-Gismondi, R. 2015. A 60-million-year Cenozoic history of western Amazonian ecosystems in Contamana, eastern Peru. Gondwana Research, 31: 30-59.

Salas-Gismondi, R., Flynn, J., Baby, P., Tejada-Lara, J.V., Wesselingh, F., Antoine, P.-O. 2015 A Miocene hyperdiverse crocodylian community reveals peculiar trophic dynamics in proto-Amazonian mega-wetlands. Proceedings of the Royal Society B, 282.1804: 20142490

Antoine, P.-O., Billet, G., Salas-Gismondi, R., Tejada-Lara, J., Baby, P., Brusset, S., Espurt, N. 2014. A new Carodnia Simpson, 1935 (Mammalia, Xenungulata) from the early Eocene of Northwestern Peru and a phylogeny of xenungulates at species level. Journal of Mammalian Evolution, 22(2): 129-140.

Pujos, F., Salas-Gismondi, R., Baby, G., Baby, P., Goillot, C., Tejada, J., Antoine, P.-O. 2013. Implication of the presence of Megathericulus (Xenarthra: Tardigrada: Megatheriidae) in the Laventan of Peruvian Amazonia. Journal of Systematic Paleontology, 11: 973-991.

Bianucci, G., Lambert, O., Salas-Gismondi, R., Tejada, J., Pujos, F., Urbina, M., Antoine, P.-O. 2013. A Miocene relative of the Ganges river dolphin (Odontoceti, Platanistidae) from the Amazon basin. Journal of Vertebrate Paleontology, 33: 741-745.

Marivaux, L., Salas-Gismondi, R., Tejada, J., Billet, G., Louterbach, M., Vink, J., Bailleul, J., Roddaz, M., Antoine, P.-O. 2012. A platyrrhine talus from the early Miocene of Peru (Amazonian Madre de Dios Sub-Andean Zone). Journal of Human Evolution, 63: 696-703.

Antoine, P.-O., Roddaz, M., Brichau, S., Tejada-Lara, J., Salas-Gismondi, R., Altamirano, A., Louterbach, M., Lambs, L., Otto, T., Brusset, S. 2013. Middle Miocene vertebrates from the Amazonian Madre de Dios Subandean Zone, Peru. Journal of South American Earth Sciences, 42: 91-102.

Antoine, P.-O., Marivaux, L., Croft, D., Billet, G., Ganerod, M., Jaramillo, C., Martin, T., Orliac, M., Tejada, J., F., Fanjat, G., Rousse, S., Salas-Gismondi, R. 2011. Middle Eocene rodents from Peruvian Amazonia reveal the pattern and timing of caviomorph origins and biogeography. Proceedings of the Royal Society B, 279: 1319-1326.

Goillot, C., Antoine, P.-O., Tejada, J., Pujos, F., Salas Gismondi, R. 2011. Middle Miocene Uruguaytheriinae (Mammalia, Astrapotheria) from Peruvian Amazonia and a review of the astrapotheriid fossil record in northern South America. Geodiversitas, 33: 331-345.

Tejada, J., et al. 2009. Los mamíferos del Mioceno y Plioceno de Espinar (Cusco): expedición y resultados preliminares del proyecto. Bulletin de l’Institut Français d’Études Andines, 38: 359-364.

Tejada, J., et al.  2009. Los mamíferos del Mioceno y Plioceno de Espinar (Cusco): antecedentes y proyecto. Bulletin de l’Institut Français d’Études Andines, 38: 133-135.

BOOK CHAPTER

Salas-Gismondi, R., Baby, P., Roncal, J., Junquas, C., Espinoza, J., Pintaud, J., Tejada, J., Calderon, Y., Antoine, PO, Roddaz, M. 2014. Control geológico y climático del sistema Andino-Amazónico y de su biodiversidad, pp. 18-31. In: El Perú frente al cambio climático: resultados de investigaciones franco-peruanas (Grégoire, A., Ed.). Obra publicada en el marco de la conferencia de las partes de la convención marco de las Naciones Unidas sobre el cambio climático-COP20.

INVITED ARTICLE

2020 “A royal duel in the natural world” Rubin Museum of Art (Spiral Magazine). Impermanence issue. https://rubinmuseum.org/spiral/a-royal-duel-in-the-natural-world 

Teaching Experience

  • IsoCamp: Stable Isotope Biogeochemistry and Ecology. Graduate level, University of Utah
  • (1) Paleoecology, (2) Dinosaurs and History of Life, (3) Life systems, (4) Principles of Oceanography. Undergraduate level, Columbia University
  • Introduction to Biological Sciences. Undergraduate level, University of Florida.