Related Experiment Video
Updated: Nov 9, 2025
08:09
An Aquatic Microbial Metaproteomics Workflow: From Cells to Tryptic Peptides Suitable for Tandem Mass Spectrometry-based Analysis
Published on: September 15, 2015
9.0K
A decadal perspective on north water microbial eukaryotes as Arctic Ocean sentinels
Nastasia J Freyria1,2, Nathalie Joli3,4, Connie Lovejoy5,6
1Institut de Biologie Intégrative et des Systèmes, Université Laval, Quebec, QC, Canada. nastasia.freyria.1@ulaval.ca.
Scientific Reports
|April 17, 2021
Summary
Arctic microbial communities show distinct seasonal patterns, with summer specialists persisting despite climate change. Uncultured dinoflagellates signal autumn conditions, challenging production increase predictions.
Area of Science:
- Marine microbial ecology
- Arctic oceanography
- Climate change impacts
Background:
- The North Water region is ecologically vital, supporting diverse marine life.
- Climate change is altering Arctic primary production seasonality.
- Impacts on planktonic microbial eukaryote communities are poorly understood.
Purpose of the Study:
- Investigate the phenology of microbial eukaryote communities in the North Water.
- Understand seasonal shifts and identify key microbial taxa.
- Assess implications for Arctic ecosystem functioning under climate change.
Main Methods:
- 12-year sampling (2005-2018) from July to October.
- High-throughput 18S rRNA V4 amplicon sequencing.
- Analysis of microbial community composition and seasonality.
Main Results:
- Community composition varied significantly between summer and autumn.
- Summer communities were dominated by specific diatoms and picochlorophytes.
- Autumn communities favored uncultured dinoflagellates, indicating distinct seasonal roles.
- Low autumn chlorophyll concentrations contradicted expectations of high production.
Conclusions:
- Key summer microbial taxa are persisting in the North Water.
- Specific oceanic dinoflagellates may serve as indicators of Arctic autumn conditions.
- Projected increases in autumn production due to longer ice-free seasons are not supported by current data.
More Related Videos
10:43Unraveling the Unseen Players in the Ocean - A Field Guide to Water Chemistry and Marine Microbiology
Published on: November 5, 2014
26.0K
09:06Removal of Exogenous Materials from the Outer Portion of Frozen Cores to Investigate the Ancient Biological Communities Harbored Inside
Published on: July 3, 2016
8.3K
Related Concept Videos
01:29Diversity of Archaea IV
218
Hyperthermophilic archaea are a group of extremophiles thriving at temperatures above 80°C, often in hydrothermal vents and volcanic soils where conditions surpass the boiling point of water. At such temperatures, proteins, membranes, and DNA in most organisms degrade, but hyperthermophiles have evolved remarkable adaptations to maintain stability and function.Unique Cellular FeaturesHyperthermophilic membranes are composed of a monolayer of biphytanyl tetraether lipids, which resist...
218
01:24Diversity of Archaea II
211
Archaea, one of the three domains of life, exhibit remarkable diversity and adaptability, thriving in both extreme and moderate environments. Historically, most identified archaea have been classified into two major phyla: Euryarchaeota and Crenarchaeota. However, recent molecular studies have expanded this classification to include three additional phyla: Thaumarchaeota, Nanoarchaeota, and Korarchaeota, each exhibiting unique characteristics and ecological roles.Thaumarchaeota: Mesophiles...
211
01:27Diversity of Archaea III
179
Crenarchaeota, a prominent phylum of Archaea, is remarkable for its ability to thrive in extreme environments characterized by high temperatures and acidity. These microorganisms inhabit sulfuric hot springs, volcanic systems, and submarine hydrothermal vents, where temperatures often exceed 100°C. The unique adaptations of Crenarchaeota not only allow survival under such extreme conditions but also provide insights into the mechanisms of life in primordial Earth-like...
179
01:30Diversity of Archaea I
264
Archaea, a domain of single-celled microorganisms, are classified into five major phyla based on genetic and biochemical characteristics: Euryarchaeota, Crenarchaeota, Thaumarchaeota, Korarchaeota, and Nanoarchaeota. Among these, the phylum Euryarchaeota is notable for its remarkable diversity in morphology, metabolism, and ecological adaptations.Morphological and Metabolic DiversityMembers of Euryarchaeota exhibit a variety of cellular shapes, including rods and cocci. Their metabolic pathways...
264
01:29Overview of Archaea
358
Archaea, named after the Archaean eon, represent a unique domain of life, distinct from bacteria and eukaryotes, with remarkable traits. Their cellular and molecular features, ecological adaptability, and industrial relevance highlight their importance in understanding life processes and leveraging biotechnology.Cellular and Molecular CharacteristicsA defining feature of archaea is their unique membrane composition. Archaeal membranes contain ether-linked isoprenoid lipids, which confer...
358
01:50Global Climate Change
27.7K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
27.7K