Infaunal index

For the assessment of the trophic infaunal index, the macrobenthos species are divided into four groups:

1. suspension feeders,

2. interface feeders,

3. surface deposit feeders, and

4. subsurface deposit feeders.

The infaunal index is calculated with the following equation:

»1, »2, »3, and »4 are the number of individuals that are sampled in each of the four species groups. If the ITI value approaches 100, suspension feeders are dominant what indicates an environmental disturbance.

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