Related Experiment Video
Updated: Jan 4, 2026
08:16
Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity
Published on: March 13, 2014
19.3K
Heterogeneity-diversity relationships in sessile organisms: a unified framework
1Department of Ecology, Evolution and Behavior, The Hebrew University of Jerusalem, Givat Ram, Jerusalem, 91904, Israel.
Ecology Letters
|November 7, 2019
Summary
Environmental heterogeneity
Area of Science:
- Ecology
- Biodiversity Science
Background:
- The traditional view posits that environmental heterogeneity increases species richness via niche partitioning.
- Recent research indicates complex heterogeneity-diversity relationships (HDR), sometimes showing decreased richness at high heterogeneity.
Purpose of the Study:
- To provide an overview of mechanisms influencing HDR.
- To present a unified conceptual model integrating these mechanisms.
- To develop a community dynamic model for generating testable predictions.
Main Methods:
- Literature review and synthesis of existing mechanisms.
- Development of a conceptual framework.
- Construction and simulation of a community dynamic model.
Main Results:
- The conceptual model integrates diverse mechanisms affecting HDR.
- The community dynamic model reveals interactions between landscape properties and species traits.
- Despite complex interactions, predicted HDR patterns are consistently simple (positive to unimodal).
Conclusions:
- A unified framework clarifies the drivers of complex heterogeneity-diversity relationships.
- The dynamic model offers a tool to predict HDR patterns based on landscape and species traits.
- Ecological communities exhibit predictable patterns in species richness across environmental heterogeneity gradients.
Related Concept Videos
01:27Diversity of Protists II
730
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...
730
01:27Diversity of Protists IV
688
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...
688
01:27Diversity of Protists III
682
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,...
682
01:15Diversity of Protists I
789
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...
789
00:58Symbiosis
36.7K
Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
36.7K
01:13Cell Diversity
4.6K
The concept of a cell started with microscopic observations of dead cork tissue by Robert Hooke in 1665. Hooke coined the term "cell" based on the resemblance of the small subdivisions in the cork to the rooms that monks inhabited, called cells. About ten years later, Antonie van Leeuwenhoek became the first person to observe the living and moving cells under a microscope. In the century that followed, the theory that cells represented the basic unit of life developed.
Multicellular...
Multicellular...
4.6K