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Updated: Apr 21, 2026
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Assembly and Tracking of Microbial Community Development within a Microwell Array Platform
Published on: June 6, 2017
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Oceanographic structure drives the assembly processes of microbial eukaryotic communities
Adam Monier1, Jérôme Comte2, Marcel Babin3
11] Takuvik Joint International Laboratory, Centre National de la Recherche Scientifique (France, CNRS UMI 3376), and Département de Biologie, Université Laval, Québec, QC, Canada [2] Québec Océan, Université Laval, Québec, QC, Canada [3] Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, QC, Canada.
The ISME Journal
|October 18, 2014
Summary
Arctic microbial communities shift with changing sea ice and river input. Changes in ocean conditions impact subsurface chlorophyll maximum development, favoring heterotrophs over phytoplankton.
Area of Science:
- Marine microbial ecology
- Arctic Oceanography
- Phytoplankton dynamics
Background:
- Subsurface chlorophyll maximum (SCM) is crucial for Arctic summer production, especially in stratified Western Arctic waters.
- Sea ice loss and increased river discharge introduce freshwater, potentially altering SCM depth, light penetration, and nutrient availability.
Purpose of the Study:
- Investigate microbial eukaryotic assemblages in relation to SCM structure under changing Arctic conditions.
- Identify how environmental factors influence community composition within and below the SCM.
Main Methods:
- Surveyed microbial eukaryotes in surface, SCM, and sub-SCM waters.
- Analyzed phylogenetic structure and community assembly processes.
- Correlated community composition with water mass properties and environmental conditions.
Main Results:
- Four distinct microbial eukaryotic communities were identified: surface, pronounced SCM, weak SCM, and deep communities.
- Pronounced SCM communities were dominated by picophytoplankton, with assembly driven by water mass history.
- Weak SCM communities showed environmental filtering, with a higher abundance of heterotrophic Picozoa.
Conclusions:
- Altered freshwater input and stratification can disrupt SCM formation, potentially reducing primary production.
- Changes in Arctic Ocean conditions favor heterotrophic microbial communities over phytoplankton in SCMs.
- Terrigenous input and water mass displacement significantly influence microbial community structure and function in the Arctic.
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