8.2. Vertebrate products
8.3. Effects
Chapter 8 - Estimates of
species richness and population size based on signs, products and
effects.
Comparative surveys of
species richness for some animal groups can be undertaken by
surveying signs or products such as footprints, faeces, nests,
burrows or cast skins. Measures of the size of populations based
on the magnitude of their products or effects are often referred
to as population indices. The relationship of these indices to
the absolute population varies from equivalence when, for
example, the number of exuviae are counted, to no more than an
approximate correlation, when the index is obtained from general
measures of damage.
| 8.1.
Arthropod products 8.2. Vertebrate products 8.3. Effects |
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