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Related Concept Videos

Trophic Efficiency00:46

Trophic Efficiency

Trophic level transfer efficiency (TLTE) is a measure of the total energy transfer from one trophic level to the next. Due to extensive energy loss as metabolic heat, an average of only 10% of the original energy obtained is passed on to the next level. This pattern of energy loss severely limits the possible number of trophic levels in a food chain.
Microbial Nutrition01:28

Microbial Nutrition

Organisms exhibit remarkable metabolic diversity, categorized based on how they acquire energy and carbon. These strategies enable survival in various ecological niches and are essential for maintaining energy flow and nutrient cycling within ecosystems.Energy and Carbon SourcesOrganisms are classified as phototrophs or chemotrophs based on energy acquisition. Phototrophs use light as their energy source, while chemotrophs rely on oxidizing chemical compounds. Further differentiation arises...
Diversity of Protists I01:15

Diversity of Protists I

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...
Diversity of Protists II01:27

Diversity of Protists II

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...
Diversity of Protists IV01:27

Diversity of Protists IV

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...
Microbial Interactions: Competition01:26

Microbial Interactions: Competition

Microbial competition is an ecological interaction in which microorganisms vie for limited resources within shared environments. These resources may include nutrients, space, or light, depending on the system. The intensity and outcome of competition are influenced by the environmental context, such as nutrient availability, spatial constraints, and the diversity of microbial species present. These competitive interactions significantly influence the structure, function, and resilience of...

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Related Experiment Video

Updated: Jul 11, 2026

Fatty Acid 13C Isotopologue Profiling Provides Insight into Trophic Carbon Transfer and Lipid Metabolism of Invertebrate Consumers
11:14

Fatty Acid 13C Isotopologue Profiling Provides Insight into Trophic Carbon Transfer and Lipid Metabolism of Invertebrate Consumers

Published on: April 17, 2018

Oligotrophs versus copiotrophs.

A L Koch1

  • 1Biology Department, Indiana University, Jordan Hall 142, 1001 E. Third St., Bloomington, IN 47405-6801, USA. Koch@indiana.edu

Bioessays : News and Reviews in Molecular, Cellular and Developmental Biology
|July 20, 2001
PubMed
Summary

Oligotrophs, bacteria thriving in low-nutrient environments, do not colonize richer habitats. Copiotrophs, common in nutrient-rich areas, are not prevalent in nutrient-poor conditions, posing an ecological puzzle.

Area of Science:

  • Microbiology
  • Ecology
  • Evolutionary Biology

Background:

  • Bacteria exhibit diverse growth strategies, with some adapted to nutrient-poor (oligotrophic) and others to nutrient-rich (copiotrophic) environments.
  • Oligotrophs grow slowly under optimal conditions and are typically found in nutrient-limited habitats.
  • Copiotrophs thrive in resource-abundant environments but are less common in nutrient-scarce conditions.

Purpose of the Study:

  • To investigate the ecological and evolutionary reasons behind the niche partitioning of oligotrophic and copiotrophic bacteria.
  • To understand why oligotrophs do not colonize richer environments.
  • To explore the limitations preventing copiotrophs from thriving in nutrient-poor conditions.

Main Methods:

  • Comparative analysis of bacterial growth kinetics under varying nutrient availabilities.

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Assembly and Quantification of Co-Cultures Combining Heterotrophic Yeast with Phototrophic Sugar-Secreting Cyanobacteria
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Assembly and Quantification of Co-Cultures Combining Heterotrophic Yeast with Phototrophic Sugar-Secreting Cyanobacteria

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Last Updated: Jul 11, 2026

Fatty Acid 13C Isotopologue Profiling Provides Insight into Trophic Carbon Transfer and Lipid Metabolism of Invertebrate Consumers
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Assembly and Quantification of Co-Cultures Combining Heterotrophic Yeast with Phototrophic Sugar-Secreting Cyanobacteria

Published on: December 27, 2024

  • Ecological niche modeling to predict habitat suitability for both bacterial types.
  • Review of existing literature on microbial adaptation and resource competition.

    • Main Results:

    • Oligotrophs possess adaptations for efficient nutrient scavenging and maintenance in low-resource settings.
    • Copiotrophs exhibit rapid growth but are outcompeted or unable to sustain themselves in oligotrophic environments.
    • Environmental conditions and specific microbial traits dictate the prevalence of each bacterial strategy.

    Conclusions:

    • The distribution of oligotrophs and copiotrophs is governed by a trade-off between rapid growth and resource-efficient survival.
    • Oligotrophs are specialized for nutrient-poor environments, while copiotrophs are adapted for fluctuating or rich nutrient conditions.
    • Understanding these bacterial strategies is crucial for predicting microbial community dynamics in diverse ecosystems.