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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.Ecological disturbances can be caused by an event as small as the trampling of underbrush to an incident as wide-ranging as a forest...
Microtubule Instability02:17

Microtubule Instability

Microtubules are hollow cylindrical filaments having a diameter of approximately 25 nm and a length that varies from 200 nm to 25 μm. GTP-bound tubulin subunits form αβ-heterodimers for microtubule assembly. These core building blocks interact longitudinally, polymerizing into protofilaments. The protofilaments then interact with one another through lateral bonding forces to form stable cylindrical microtubules. These cylindrical filaments are dynamic as they undergo repeated assembly and...
Microtubule Instability02:17

Microtubule Instability

Microtubules are hollow cylindrical filaments having a diameter of approximately 25 nm and a length that varies from 200 nm to 25 μm. GTP-bound tubulin subunits form αβ-heterodimers for microtubule assembly. These core building blocks interact longitudinally, polymerizing into protofilaments. The protofilaments then interact with one another through lateral bonding forces to form stable cylindrical microtubules. These cylindrical filaments are dynamic as they undergo repeated assembly and...
Stability01:28

Stability

The time response of a linear time-invariant (LTI) system can be divided into transient and steady-state responses. The transient response represents the system's initial reaction to a change in input and diminishes to zero over time. In contrast, the steady-state response is the behavior that persists after the transient effects have faded.
The stability of an LTI system is determined by the roots of its characteristic equation, known as poles. A system is stable if it produces a bounded...
Ecological Succession02:17

Ecological Succession

Ecological succession is influenced by the processes of facilitation, inhibition, and toleration. Facilitation occurs when early successional species create more favorable ecological conditions for subsequent species, such as enhanced nutrient, water, or light availability. In contrast, inhibition happens when early successional species create unfavorable ecological conditions for potential successive species, such as limiting resource availability. In some cases, later successional species...
Microenvironments01:22

Microenvironments

Microorganisms inhabit highly localized spaces known as microenvironments, which are defined by distinct physical and chemical characteristics. These include oxygen concentration, pH, temperature, light availability, and nutrient levels. The conditions within a microenvironment can differ markedly from those in the surrounding area and significantly influence microbial growth, metabolism, and community structure.Microenvironments often display sharp physicochemical gradients over small spatial...

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Related Experiment Video

Updated: Jun 5, 2026

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity
08:16

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

Published on: March 13, 2014

Short-term instabilities and long-term community dynamics.

P Chesson1, N Huntly

  • 1Dept of Zoology, Ohio State University, 1735 Neil Avenue, Columbus, OH 43210-1293, USA.

Trends in Ecology & Evolution
|January 14, 2011
PubMed
Summary
This summary is machine-generated.

Temporal environmental variability can drive species coexistence or instability. Long-term stability is linked to buffered population growth rates and nonlinear competition, offering new insights into species diversity.

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Area of Science:

  • Ecology
  • Population Dynamics
  • Environmental Science

Background:

  • Competition in fluctuating environments presents a challenge to species coexistence.
  • Previous research links long-term stability to specific relationships between environmental and competitive factors.
  • Population growth rate buffering is a key factor in maintaining stability.

Purpose of the Study:

  • To investigate the mechanisms driving long-term species stability in temporally variable environments.
  • To explore the relationship between environmental variability, competition, and population dynamics.
  • To identify new approaches for understanding and studying species diversity.

Main Methods:

  • Analysis of theoretical models of population dynamics under environmental fluctuations.
  • Examination of how population subdivision (life-history stages, microenvironments, phenotypes) affects growth rates.
  • Investigation of nonlinear functional responses of population growth to competition.

Main Results:

  • Short-term instabilities from temporal variability can lead to either long-term coexistence or instability.
  • Long-term stability is associated with positive environmental-competitive effect relationships and buffered population growth.
  • Buffered growth rates are achieved through population subdivision across various axes.
  • Nonlinear population growth as a function of competition also promotes long-term stability.

Conclusions:

  • Species diversity can be better understood by considering the interplay of environmental variability and population dynamics.
  • Population subdivision and nonlinear competition are critical mechanisms for maintaining ecological stability.
  • These findings offer novel perspectives for ecological research on biodiversity and stability.