Related Experiment Video
Updated: May 17, 2026
07:41
Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems
Published on: July 30, 2019
[Relation between fundamental and realized ecological niche]
Zhurnal Obshchei Biologii
|November 10, 2012
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.
- 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.
More Related Videos
Related Concept Videos
02:02Ecological 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.
00:46Trophic 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.
00:48Optimal 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.
01:38Limits 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.
01:26Microbial 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...
02:26Ecological 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.