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Field studies rapid mapping

The size and shape of an area affected by pollution can be discovered rapidly (and cheaply) by mapping indicator species. Ideally these should be widespread, easy to recognize, have shown a sharp extinction point in any transect studies. To obtain meaningful maps it is important to carefully standardize the habitats examined as field observations suggest that sheltered sites, sites subject to nutrient flushing, species of tree, and even position on tree can have a pronounced effect on survival. By using different species and varying the substratum it is possible to determine a boundary at almost any... [Pg.448]

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