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Catalina Cuellar Gempeler (born August 25, 1984) is a Colombian microbial ecologist and marine microbiologist, currently teaching and doing research at Humboldt State University. Her research focuses mainly on understanding microbial meta-community and eco-evolutionary dynamics. The Catalina Cuellar-Gempeler lab is currently focused on studying the interactions between hosts and their microbial communities. The lab's main emphasis is on the microbes used in digestion in the Californian and Eastern, carnivorous pitcher plants . In March 2021, Catalina was awarded an Early Career grant for $1 million by the National Science Foundation.

Early life and education[edit]
Cuellar-Gempeler was born on August 25th 1984 in Bogota, Colombia. She is the oldest of three children. Her father Carlos Cuellar is a Colombian, gastroenterologist in Bogota, while her mother, Emilia Gempeler, of Swiss descent, is a senior occupational health nurse. As a young child, and teenager, Cuellar-Gempeler attended Helvetia school, a private multilingual (Spanish, German, French) Swiss school located in Suba, Bogotá, Colombia. Cuellar-Gempeler showed an interest in microbes early on while on a field trip to Sierra Nevada del Cocuy in Colombia. When she was back home from this field trip she couldn’t stop thinking about the microbes living around her, whose lives unfold much quicker than human lives do. Soon after her high-school graduation, Catalina started her studies at Universidad de Los Andes in Bogota, graduating with both a B.Sc. in biology and a B.Sc. in microbiology in 2008. During college, Catalina was an outstanding student, who thrived in all subjects ranging from Cellular biology to Chemistry and Physics. She attended graduate school at the University of Texas at Austin where she earned a PhD in integrative biology Catalina's PhD thesis focused on ecological and evolutionary processes driving crustacean-associated microbial communities. Specifically her PhD project investigated the effects of fiddler crab on sediment bacteria in in the Yucatán Peninsula, under the supervision of Pablo Munguia.

Academic career[edit]
After obtaining her Ph.D. in 2015, Cuellar-Gempeler was hired as a post-doctoral scholar at Florida State University for 2 years. In 2018, Catalina and her husband moved to Humboldt State University in Aracata, California, where she is an assistant professor. Cuellar-Gempeler created the Catalina Cuellar-Gempeler lab where she investigates the functioning and assembly of microbial communities hosted by animals and plants. The lab's main research themes comprise Ecological theory, Microbiology and Natural History. Currently, Catalina is advising four graduate students: Parker Lund, Jonas Sotingco, Megan Teigen, and Sandrine Grandmont-Lemire.

Research and teaching[edit]
Since the beginning of her academic career, Catalina has been interested not only in understanding the interaction between metazoans and microorganisms, but also in environmental education. Before graduating from Universidad de Los Andes, she took a semester off to take a field guiding course at Kruger National Park, South Africa, where she improved her knowledge about African ecosystems and her leading and teaching skills. As a PhD candidate at the University of Texas at Austin she worked as an assistant teacher for Molecules to Organisms, Ecology, Limnology and Scientific inquiry. Currently, at her assistant professor appointment she is teaching General Microbiology, Microbial Ecology and Marine microbiology. Cuellar Gempeler's lab main focus is on: Biodiversity-Ecosystem function relationships in pitcher plant meta-communities, Microbial ecology of conservation (Astragalus applegatei ​'s mycorrhizae) and Microbiome of invasive marine invertebrates.

Awards and honors[edit]
Catalina has has been awarded an Early Career grant for $1 million by the National Science Foundation. This award is given to outstanding academics who have great potential to become role models in their communities while engaging in both research and education.

Publications[edit]
C. Cuellar-Gempeler. 2021. Diversity-function relationships and the underlying ecological mechanisms in host-associated microbial communities. In: Advances in Environmental Microbiology, Vol 8. 297-326

Munoz-Ucros, J., M. Zwetsloot, C. Cuellar-Gempeler and T. Bauerle. Spatio-temporal patterns of rhizosphere microbiome assembly: from ecological theory to agricultural application. Journal of Applied Ecology 58(5):894-904.

Cuellar-Gempeler, C. and P. Munguia. 2019. Habitat filters mediate successional trajectories in bacterial communities associated with the striped shore crab. Oecologia 191(4): 957-970.

T.E. Miller, M. L. Buhler and C. Cuellar-Gempeler. 2019. Species-specific differences determine responses to a resource pulse and predation. Oecologia 190(1) 169-178. .

C. Cuellar-Gempeler, and M. Leibold. 2019. Key colonist pools and habitat filters mediate diversity of fiddler crab-associated microbial communities. Ecology 100(4) : e02628.

C. Cuellar-Gempeler and M.A. Leibold, 2018. Multiple colonist pools shape fiddler crab-associated microbial communities. The ISME Journal 12:825-837. Accession number: PRJNA496296

E. Canter, C. Cuellar-Gempeler, A. Pastore, T.E. Miller and O. Mason, 2018. Predator identity more than predator richness structures aquatic microbial assemblages in Sarracenia purpurea leaves. Ecology.

Holdridge, E., C. Cuellar-Gempeler, and C. terHost, 2016. A shift from exploitation to interference competition with increasing density affects population and community dynamics. Ecology and Evolution 6 (15):5333-5341.

Cuellar-Gempeler, C. and P. Munguia. 2013. Fiddler crabs affect bacterial assemblages in mangrove forest sediments. Community Ecology 14(1): 59-66.