Marine Microbial Ecology Group – MMEco
Short description
We study the microbes of the sea. How do they adapt to changes in the ecosystem and at which rates? How do they interact with other microbial organisms? How do communities change in space and time? Which roles and functions do these microbes have in the ocean? To learn about the organisms, we use lab and field experiments and join research expeditions where we extract DNA from the environment and measure rates of different chemical reactions that are performed by microbes.
We are a new working group and welcome enthusiastic students, PhD students and postdocs to join us! If you like to learn more about our research, please contact Carina directly.
Congratulations Dr. Ben!
Recently, Benedikt Heyerhoff brilliantly defended his PhD thesis Ecological implications of marine viruses on host diversity, metabolism and the marine dissolved organic matter pool at the Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg. His project focused on the role of phages for marine bacteria, their abundance in marine ecosystems, genetic composition, and lifestyle. He uses phage-specific signatures in metagenomes constructed from the Baltic Sea and a mesocosm experiment from the EcoMol Research Training Group to quantify their distribution and specificity in the marine environment.
It was a great joy to work together on the smallest life forms of the sea, in the EcoMol project and with Baltic Sea phages!
The Nord Stream leak
We recently joined two research expeditions onboard of R/V Skagerak to the southern Baltic Sea to study the extend and impact of the methane pipeline gas leaks for the planktonic ecosystem. We took several hundreds of samples that we are now processing in the lab for various parameters.
Effects of underwater gas leaks on plankton communities
The methane gas leaks near Bornholm in 2022 were one of the largest gas leaks potentially impacting the marine environment. The greenhouse gas methane is produced naturally through biotic processes, but the effects of such high concentrations on the sensitive ecosystem of the Baltic Sea are unknown. Some methanotrophic bacteria can oxidize methane, but their abundance in surface waters is usually low.
With this project I want to investigate whether the abundance and activity of methanotrophic bacteria increases in response to gas leaks. Ultimately, this knowledge will help to identify and shape possible responses to future gas emissions that can contribute to a healthier ocean.
The project is funded by BalticWaters2030 and Formas.
Carbon turnover of bacterial communities in the ocean
Biogeochemical models are powerful tools to assess how the large ocean reservoir of carbon influences and is influenced by the climate system. However, the high diversity of organic carbon compounds, microbial communities and their interactions is a challenge for modelling approaches. Here, we use controlled experimental conditions to disentangle the influence of microbial interactions on dissolved organic carbon biogeochemistry, by combining practical microbial experiments with a modelling perspective in a case study.
This project is a collaboration with Prof. Dr. Sinikka Lennartz, University of Oldenburg, Germany and funded by the Add-on fellowship for Interdisciplinary Life Sciences of the Joachim-Herz-Foundation.
More about the project: Biogeochemical Ocean Modelling
Linnaeus Microbial Observatory (LMO) - disentangling seasonal plankton dynamics
The Linnaeus Microbial Observatory, LMO, is a time-series station in the Baltic Sea Proper and the core of many research projects in microbial oceanography at Linnaeus University. Since many years, we collaborate on the topic of bacterioplankton community dynamics and links to dissolved organic matter turnover.
More about the station: Linnaeus Microbial Observatory
Location
The MMEco Group is located at the Marine Department in Gothenburg. Here, we have sterile labs and thermal constant rooms that are ideal for our research. For larger experiments, we use the facilities of Kristineberg Center and the Tjärnö Marine Laboratory that offer excellent facilities for field work.
