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Related Concept Videos

Ecological Niches02:02

Ecological Niches

All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.
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.
Optimal Foraging00:48

Optimal Foraging

How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
Limits to Natural Selection01:38

Limits to Natural Selection

Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.
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...
Ecological Disturbance02:26

Ecological Disturbance

An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.

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Articles linked to this work by shared authors, journal, and citation graph.

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[The evolutionary role of predatory mammals and mechanisms of its realization].

Zhurnal obshchei biologii·2015
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[On the II International Conference "Contemporary Problems of Biological Evolution", 11-14 March 2014, Moscow].

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[Crucial stages of embryogenesis of Rana arvalis: Part 3. Modularity or developmental integrity].

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[Crucial stages of embryogenesis of Rana arvalis: Part 2. Development of head structures].

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[Factors influencing the hunting success of a predator: a model with sighthounds].

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Related Experiment Video

Updated: May 17, 2026

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems
07:41

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Published on: July 30, 2019

[Relation between fundamental and realized ecological niche].

A S Severtsov

    Zhurnal Obshchei Biologii
    |November 10, 2012
    PubMed
    Summary

    Species evolve in stasis due to balanced selection pressures. Environmental changes can disrupt this balance, leading to adaptations that define the fundamental niche boundaries.

    Area of Science:

    • Evolutionary biology
    • Ecological science

    Context:

    • Species and their ecological niches form through evolution.
    • Species often exist in evolutionary stasis for extended periods, maintained by balanced selection.
    • Ecological niches are complex, multidimensional structures influenced by numerous environmental factors.

    Purpose:

    • To explore the evolutionary dynamics of species and their ecological niches.
    • To explain the mechanisms maintaining evolutionary stasis.
    • To define the relationship between environmental factors, selection pressures, and niche structure.

    Summary:

    • Evolutionary stasis is maintained by counteracting selection vectors acting on multidimensional ecological niches.
    • Environmental deteriorations can unbalance selection, leading to adaptations that define the fundamental niche.

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  • The realized niche is a subset of the fundamental niche, shaped by population-specific adaptations and environmental conditions, not solely by interspecific competition.

    • Impact:

    • Provides insight into the stability and adaptability of species.
    • Clarifies the formation and limitations of fundamental and realized ecological niches.
    • Highlights the role of selection balance in evolutionary processes and niche dynamics.