AGS 701 (Basics of Agricultural Systems)
Assignment No.4
1. Read: Duelli, P. and M.K. Obrist. 2003. Biodiversity indicators: the choices of values and measures. Agriculture, Ecosystems and Environment 98: 87-98. the boundary, hierarchy, input, control, transformation and output of these systems.

 

a) Why is a single indicator for biodiversity difficult to implement?
b) What indices did the authors suggest for evaluating agricultural landscape?

2. The table below shows the observations recorded from the field survey of two agroecosystems. Determine Shannon index, Simpson Index and evenness index of these agroecosystems. Discuss your results.

 

Number of plants in sample
Species
Agroecosystem A
Agroecosystem B
A
B
C
D
E
F
4
8
60
10
8
10
20
15
15
20
15
15

Due: July 15, 2004.