From nutrients to algae growth

Southern phytoplankton. Ocean. Credit: Jeff McQuaid

Phytoplankton is the foundation of marine ecosystems. Like rainforests, they consume carbon from the atmosphere, form the basis of marine food webs, and have a decisive impact on fish abundance and the Earth’s climate. This is an international study in which the GEOMAR Helmholtz Center for Ocean Research Kiel participated and is currently published in the journal. Science AdvancesProvides new insights into the complex biogeochemical processes underlying marine ecosystems.

Every life starts on a small scale Ocean.. The microbial phytoplankton forms an important basis for the entire marine ecosystem and ultimately determines how fish stocks develop and atmospheric carbon dioxide is absorbed by the ocean. In this regard, understanding the basics of marine ecosystems is important for two basic questions for the future of our population: nutrition and climate.

Scientists at Dalhousie University, University of Liverpool, GEOMAR Helmholtz Marine Research Center Kiel and Scripps Institution of Oceanography have developed new models for research. Growth of phytoplankton In the sea. We combined this model with metaproteomics and environmental data to enable accurate predictions of phytoplankton growth in the Antarctic Ocean and more. “The growth of phytoplankton can be thought of as industrial production in a factory. The material is brought into the factory and processed on the assembly line to produce the final product,” said the lead author and doctorate of the study. Scott McCain who got the explanation explains. A student in the Faculty of Biology at Dalhousie University in Canada. “We asked ourselves how to increase production, which is the quantity of products shipped from the factory,” McCain adds. Applies to phytoplankton, does that mean how fast they can grow?

“As part of our research, we found that phytoplankton would relocate the’cell assembly line’to do this,” explained Dr. Eric Actorberg, co-author of GEOMAR’s research. “We were not interested in the amount of available nutrients such as iron and manganese that are important for the growth of phytoplankton, but the phytoplankton’cell assembly line’provided the raw materials for their growth. I was interested in the problem of how to handle it. Adapt to change. ”

To do this, researchers have created a mathematical model of phytoplankton that allows them to simulate these processes. The model was linked to Antarctic laboratory and cruise data on metaproteomics, dissolved iron, and manganese. This gave them a new explanation of the various phytoplankton processes. “Our results show that cumulative cell costs determine how environmental conditions alter phytoplankton growth,” says Professor Achterberg.

“This radically changed the way we see phytoplankton growth and how Phytoplankton According to Canadian scientists, these findings are Fish inventory And global climate change.

New factors in the Antarctic carbon cycle identified

For more information:
J. Scott P. McCain et al., Cell cost supports phytoplankton micronutrient limitation, Science Advances (2021). DOI: 10.1126 / sciadv.abg6501

Quote: “Phytoplankton Factory”: From nutrients to algae growth (August 9, 2021), August 9, 2021 Obtained from growth.html

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