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Related Concept Videos

Diversity of Protists I01:15

Diversity of Protists I

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Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
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Diversity of Protists II01:27

Diversity of Protists II

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Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
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Diversity of Protists III01:27

Diversity of Protists III

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Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
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Diversity of Protists IV01:27

Diversity of Protists IV

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Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
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Overview of Protists01:27

Overview of Protists

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Protists are diverse eukaryotic microorganisms that lack the specialized tissues of plants and animals and the chitinous cell walls of fungi. Their early divergence within Eukarya resulted in structural, functional, and ecological diversity. They are classified into supergroups such as Archaeplastida, Excavata, Amoebozoa, Rhizaria, Alveolata, and Stramenopiles, determined through genetic analysis and structural similarities.Structural and Functional AdaptationsProtists have various adaptations...
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The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
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Updated: Sep 9, 2025

Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential
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Towards a trait-based framework for protist ecology and evolution.

Mahwash Jamy1, Pierre Ramond2, David Bass3

  • 1Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden.

Trends in Microbiology
|September 4, 2025
PubMed
Summary
This summary is machine-generated.

A traits-based approach is crucial for understanding protist functional diversity. Developing a protist trait database will advance research in protist ecology and evolution.

Keywords:
ecosystem functioningfunctional ecologyprotist biodiversitytrait database

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Area of Science:

  • Ecology
  • Evolutionary Biology
  • Microbiology

Background:

  • Protists represent the majority of eukaryotic genetic and functional diversity.
  • Environmental sequencing reveals vast, understudied protist abundance and diversity.
  • Protists play critical roles as primary/secondary producers with diverse ecological specializations.

Purpose of the Study:

  • Advocate for a traits-based approach to study protist diversity.
  • Highlight the need for a comprehensive protist trait database.
  • Address knowledge gaps in understanding protist functional roles.

Main Methods:

  • Review current genomic and transcriptomic approaches for studying protists.
  • Integrate examples of recent work on protist functional diversity.
  • Propose strategies for developing a trait database.

Main Results:

  • Genomic/transcriptomic data alone are insufficient to capture protist morphological and behavioral traits.
  • A traits-based framework is essential for understanding protist functional roles.
  • Trait databases offer significant opportunities for ecological and evolutionary research.

Conclusions:

  • A trait-based framework is vital for advancing protist ecology and evolution research.
  • Developing a protist trait database will facilitate answering key ecological questions.
  • Future research should prioritize integrating trait data for a holistic understanding of protists.