Dr. Jarone Pinhassi’s Network

Linnaeus University

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I do research on bacterioplankton community structure and function in the marine environment. This includes spatiotemporal studies of bacterial diversity and gene expression (metatranscriptomics) in different seas, like the Baltic Sea, NW Atlantic and the Mediterranean Sea. Investigating the ecology and physiology of rhodopsin photoheterotrophy represents an important line of research. Analyses of the biodiversity of marine planktonic bacteria and their metabolism are essential to quantitatively asses the critical role bacteria play in carbon and nutrient turnover and energy flow through the marine ecosystem.

Key words: Ocean microbiome, Marine bacteria, Population dynamics, Biogeography, Ecophysiology, Rhodopsin photoheterotrophy

Theme leader for: Microbial biogeography across and within aquatic biomes


Clara Perez-Martinez, PhD Student

My research focuses on marine microbial ecology, diversity and function. I am interested in bacterial community responses to environmental changes as well as how bacteria influence their environment, with particular focus on organic and inorganic nutrient cycling. My analyses are based on state of the art methods in microbial ecology, such as metagenomics and metatranscriptomics.

Key words: Marine Microbial Ecology, Environmental Genomics, Metatranscriptomics, Vitamins, Nutrients, Climate Change

Theme: 2, Functional Diversity

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Benjamin Pontiller is a microbial ecologist with a special interest in aquatic ecosystems. He received his BSc in Biology with a specialization in microbiology. His curiosity and interest about the paramount role of the “unseen majority” in the global carbon cycle led him to continue in the field of microbial ecology before eventually obtaining his MSc from the University of Vienna. After his graduation, he moved on to Sweden and accepted a PhD position at the Linnaeus University in Kalmar under the supervision of Professor Jarone Pinhassi. He is now working intensively on the interaction between bacteria and dissolved organic matter (DOM), a critical component in the earth’s carbon cycle. The main focus of Ben's research is to investigate the functional role of marine bacterioplankton in carbon cycling by deciphering the genetic basis for organic carbon utilization. Dissolved organic carbon (DOC) derived from phytoplankton photosynthesis represents the main biologically available organic carbon pool in the ocean. The uptake and utilization of organic carbon compounds are mainly determined by the metabolic potential encoded in the genomes of marine bacteria. However, detail on the underlying molecular mechanisms and how they impact the cycling of organic matter remain largely unknown. Ben's research is based on field studies and experiments with natural marine bacterial assemblages. His current work focuses on elucidating the functional dynamics of heterotrophic bacteria in the degradation of ecologically relevant sources of organic compounds by applying state-of-the-art techniques currently used in microbiology, microbial ecology and molecular biology.

Keywords: Meta(omics), bacterioplankton, Baltic Sea, climate change, DOM