Models and Indices
Please note: The information on this page reflects the ABMI's most recently published methods and protocols. Our models and indices are frequently updated and refined. If you would like to know more about modifications or updates that are currently in progress or in review, please contact us.
In addition to its core monitoring activities, two of the ABMI’s main goals are to support management and stewardship of natural resources by providing:
- Empirical models of the relationship of species to habitat, disturbance, or other environmental variables, and
- Credible and understandable indices of the status of biodiversity.
This page details the statistical methods used to produce species–habitat models for a wide range of species, and to derive estimated reference conditions. It also details the index the ABMI has developed to express the “intactness” (or deviation from baseline conditions) for species, groups of species, and habitat features, and the application of this index to estimate the relative effects of different sectors, or sources of human footprint.
- Species–habitat models relate the abundance of target species to habitat attributes. They can be used to predict species abundance for any point in time or space for which habitat information is available.
- The Intactness Index provides an estimate of how much a species' abundance has diverged from baseline due to human disturbance.
- Sector effects provide an estimate of the effect of specific sources of human disturbance on the abundance of target species.
Summaries of habitat relationships, intactness, and sector effects are presented for hundred of species through the ABMI's Biodiversity Browser.
The methods presented below are continuously in revision, with updates released periodically. Content on this page is adapted from, and further information is available via, the following sources:
- ABMI Manual for Species Modelling and Intactness
- ABMI Essentials: Intactness
- ABMI Science Letter: Effects of Industrial Sectors on Species Abundance in Alberta
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