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SciLifeLab seminar series-Campus Solna, Sarahi L. Garcia

Tuesday, November 5, at 15:00 in Air and Fire

Sarahi L. Garcia

SciLifeLab Fellow, Stockholm University, Sweden

Sarahi L. Garcia is starting as an Assistant Professor at Stockholm University. She graduated from UAdeC in Mexico, got her MS from University of Georgia and PhD from Friedrich Schiller University in Jena. She is interested in microbial interactions and their effect on carbon cycling in aquatic environments.

Title of the talk: Aquatic microbial diversity, functions and interactions: genomic insights from natural and model communities

Microorganisms are the most phylogenetically diverse and abundant taxa on Earth, and their functions are indispensable in regulating global elemental cycling, bioremediation, human health and other processes. The microbial world can be studied using cultivation-based or cultivation-independent techniques. Cultivation-independent techniques include holistic approaches, such as full community analysis of environmental samples, as well as reductionist approaches, such as single cell genomics. These methodologies have greatly contributed to our current understanding about indispensable microbial functions and their immense diversity. With my research, I have integrated these holistic and reductionist strategies, and leveraged an intermediate approach, such as model communities, allowing me to address new ecological questions about microbial interactions. During my talk, I will present a case study of very abundant and ubiquitous freshwater bacteria called acI (within the phylum Actinobacteria). Using multiple methodological approaches we found that the life strategy of this bacteria features reduced genomic content and cellular maintenance cost, exploiting promiscuous interactions to acquire necessary biomolecules. Moreover, I will also discuss how studying this bacterial group has broadened my research interest from a single species perspective to trying to understand multi-species microbial interactions in various aquatic environments.
Host: Mats Nilsson