Species Diversity
Exploring the variety of species found in a particular region, including species richness and evenness.
What is Species Diversity?
The variety of different species within a given area, encompassing both the number of species (richness) and their relative abundance (evenness).
Key points
- Define species diversity.
- Differentiate between species richness and species evenness.
- Explain the significance of species diversity in ecosystems.
- Identify factors influencing species diversity.
Common exam trap
Confusing species diversity solely with species richness, ignoring evenness.
Definitions
- Term
Species Diversity
- Meaning
The variety of different species within a given area, encompassing both the number of species (richness) and their relative abundance (evenness).
- Term
Species Richness
- Meaning
The number of different species present in a particular ecosystem or region.
- Term
Species Evenness
- Meaning
A measure of the relative abundance of different species in a community; it describes how close in numbers each species in an environment is.
Learning objectives
Define species diversity.
Differentiate between species richness and species evenness.
Explain the significance of species diversity in ecosystems.
Identify factors influencing species diversity.
Prerequisites
Basic understanding of ecosystems.
Concept of population and community.
Common mistakes
Confusing species diversity solely with species richness, ignoring evenness.
Overlooking the impact of human activities on reducing species diversity.
Assuming that more individuals always means more diversity (it's about variety of species).
Keywords
Species Diversity
Biodiversity
Species Richness
Species Evenness
Ecosystem Stability
Latitudinal Gradient
Conservation Biology
Practice preview
A scientist is studying two ecosystems. Ecosystem A has 50 different species, with roughly equal numbers of individuals for each species. Ecosystem B has 50 different species, but 90% of the individuals belong to just on…
medium
Species evenness refers to:…
easy
Which statement about species diversity is INCORRECT?…
medium