What is a diversity index and how can it be used?
Simpson’s Diversity Index is a measure of diversity which takes into account the number of species present, as well as the relative abundance of each species. As species richness and evenness increase, so diversity increases. The value of D ranges between 0 and 1.
Why is it important to have a high biodiversity index?
Biodiversity boosts ecosystem productivity where each species, no matter how small, all have an important role to play. … A larger number of plant species means a greater variety of crops. Greater species diversity ensures natural sustainability for all life forms.
How do you find biodiversity index?
One way to calculate a simple biodiversity index is by dividing the species richness by the species evenness. Take it outside! Try this methodology in your backyard or a local park to measure the biodiversity of organisms.
How do we measure biodiversity?
One way to measure biodiversity is to assess species richness of an ecosystem, which is the total number of distinct species within a local community. While having many species generally coincides with having a diverse and healthy ecosystem, the evenness also needs to be considered.
What is biodiversity and biodiversity index?
Scientists use a formula called the biodiversity index to describe the amount of species diversity in a given area. A simple biodiversity index is calculated as follows: number of species in the area ÷ total number of individuals in the area = biodiversity index.
What is Pi in diversity index?
The Shannon Diversity Index was computed as (H’ = ΣPi*ln Pi) where H’ is the index of diversity, Pi is the importance value of a species as a proportion of all species. … An ecosystem with H’ value greater than 2 has been regarded as medium to high diverse in terms of species.
What does Simpson’s index measure?
Simpson’s Diversity Index is used to calculate a measure of diversity, taking into account the number of something as well as its abundance.
Why do we need to measure the biodiversity of an ecosystem?
Biodiversity is a measure that combines richness and evenness across species. It is often measured because high biodiversity is perceived a synonymous with ecosystem health. … some species work together so that both can survive (called commensalism) and therefore, diverse communities can be more stable.
How is biodiversity adversely affected by human activity?
Humans affect biodiversity by their population numbers, use of land, and their lifestyles, causing damage to habitats for species. … Through proper education, and by demanding that governments make decisions to preserve biodiversity, the human population will be able to sustain life on earth longer.
What are the uses of biodiversity?
Importance of biodiversity
- Economic— biodiversity provides humans with raw materials for consumption and production. …
- Ecological life support— biodiversity provides functioning ecosystems that supply oxygen, clean air and water, pollination of plants, pest control, wastewater treatment and many ecosystem services.