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Unraveling the Unseen Players in the Ocean - A Field Guide to Water Chemistry and Marine Microbiology
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Ecological interactions between marine RNA viruses and planktonic copepods
Junya Hirai1, Seiji Katakura2, Hiromi Kasai3
1Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan. hirai@aori.u-tokyo.ac.jp.
Communications Biology
|November 20, 2024
Summary
Marine viruses influence copepod populations. This study found novel viruses in Pseudocalanus newmani, linking viral prevalence to copepod abundance and suggesting viruses impact their movement and physiology.
Area of Science:
- Marine biology
- Virology
- Ecology
Background:
- Zooplankton-virus interactions are vital in marine ecosystems but often overlooked.
- The copepod Pseudocalanus newmani is a key component of marine food webs.
Purpose of the Study:
- To investigate the interactions between marine viruses and the copepod Pseudocalanus newmani.
- To understand the role of viruses in controlling copepod population dynamics.
Main Methods:
- Analysis of copepod transcriptome data to identify novel viruses.
- Weekly zooplankton sampling to track virus prevalence.
- Gene expression analysis to study viral impact on copepod physiology.
- Metabarcoding diet analysis to determine copepod prey.
Main Results:
- Four novel RNA viruses were discovered in P. newmani.
- Virus prevalence peaked during low copepod abundance periods.
- A Picorna-like virus was associated with increased viral replication and decreased copepod movement.
- Diatoms were identified as the primary prey, with viral particles found in copepod guts.
Conclusions:
- Marine viruses are a significant factor controlling copepod population dynamics.
- Zooplankton-virus interactions are crucial for understanding marine ecosystem functioning.
- Further research into these interactions can enhance our understanding of marine ecosystems.
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