Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Ecology and Biology: Shannon Diversity Index: Definition & Example

The Shannon Diversity Index (sometimes called the Shannon-Wiener Index) is a way to measure the diversity of species in a community.

Denoted as H, this index is calculated as:

H = -Σp_i * ln(p_i)

where:

Σ: A Greek symbol that means “sum”
ln: Natural log
p_i: The proportion of the entire community made up of species i

The higher the value of H, the higher the diversity of species in a particular community. The lower the value of H, the lower the diversity. A value of H = 0 indicates a community that only has one species.

The Shannon Equitability Index is a way to measure the evenness of species in a community. The term “evenness” simply refers to how similar the abundances of different species are in the community.

Denoted as E_H, this index is calculated as:

E_H = H / ln(S)

where:

H: The Shannon Diversity Index
S: The total number of unique species

What is the Shannon diversity index value for this community?

What is the Species evenness value for this community?

For the community in this
table, calculate the
Shannon diversity index
and Evenness
order
Orthoptera
Orthoptera
(grasshopper)
(grasshopper)
Lepidoptera
Lepidoptera
(butterfly)
Coleoptera (beetle)
(butterfly)
description
green with
red legs
brown with
a yellow
stripe
large, blue
small, blue
red & blue
number of
individuals
(n)
6
5
1
3
12

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