The health and function of an ecological area is often determined by indicator values. These quantitative representations reveal conditions and trends about that ecosystem that help in development planning and decision making concerning the area. Ecological indicators often combine numerous environmental factors into a single value. In doing so, this creates a powerful numerical figure, but one which must be used in the proper context in order for it to make sense. This book explains several indicator values, showing how they are calculated from collected environmental data, and how they might be used.
This book can be found in HECSA Library:
Ecological Indicators for Coastal and Estuarine Environmental Assessment: A Users Guide
J.C. Marques, F. Salas, J. Patricio, H. Teixeira, and J.M. Neto
QH 541.15 .I5 E26 2009