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Monitoring Spatial Segregation in Surface Colonizing Microbial Populations
Published on: October 29, 2016
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Spatial dynamics of active microeukaryotes along a latitudinal gradient: Diversity, assembly process, and
Dapeng Xu1, Hejun Kong1, Eun-Jin Yang2
1State Key Laboratory of Marine Environmental Science, Institute of Marine Microbes and Ecospheres, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China; Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiamen, China.
Environmental Research
|April 7, 2022
Summary
Arctic microeukaryote communities shift with latitude, driven by temperature changes. Understanding these changes is key to predicting the impacts of global warming on Arctic ecosystems and nutrient cycles.
Area of Science:
- Marine microbiology
- Arctic ecology
- Biogeochemical cycles
Background:
- Global warming is significantly impacting Arctic ecosystems.
- Microeukaryotes play vital roles in Arctic biogeochemical cycles.
- Understanding microeukaryote responses is crucial for predicting ecosystem changes.
Purpose of the Study:
- To investigate the diversity, community composition, and co-occurrence networks of microeukaryotes in the Arctic Ocean.
- To elucidate the impact of environmental factors, particularly temperature, on microeukaryote communities.
- To provide insights into the response of microeukaryote communities to a changing Arctic.
Main Methods:
- Seawater samples collected along a latitudinal transect from the East Sea to the central Arctic Ocean.
- Environmental RNA extracted and SSU rRNA gene sequenced using high-throughput sequencing.
- Sequences clustered into zero-radius OTUs (ZOTUs) and taxonomically assigned against the PR2 database.
Main Results:
- A latitudinal diversity gradient was observed for pico- and nano-sized microeukaryotes.
- Three distinct microeukaryote communities were identified: Leg-A, Leg-B surface, and Leg-B subsurface chlorophyll a maximum (SCM).
- Water temperature was identified as the primary driver of microeukaryote diversity and community structure.
Conclusions:
- Microeukaryote communities exhibit distinct spatial patterns and structures across the Arctic latitudinal gradient.
- Temperature is a critical factor influencing microeukaryote diversity and community assembly in the Arctic Ocean.
- This study enhances understanding of microeukaryote responses to ongoing Arctic environmental changes.
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