Temporal Connectivity of Mature Patches in Forest Planning Models
We present a deterministic forest harvest scheduling model that ensures the temporal connectivity of mature forest habitat patches over time in a landscape managed for timber production. Past models have addressed the spatial aspects of habitat connectivity by requiring a certain amount of mature forest habitat to be retained throughout the planning horizon in contiguous patches of minimum size and age. These models do not recognize, however, that the dynamic patches of a managed forest ecosystem might not provide escape routes from “old” to “new” patches for certain wildlife unless there is temporal overlap among the patches. Biologists have suggested that the lifespan of patches is often more important than their size and contiguity for species survival. A mixed-integer programming formulation is proposed that guarantees overlap among patches of mature forest habitat that arise and disappear over time as the forest ages and is harvested. Four real forests are used to illustrate the mechanics of the approach and to show that the model is computationally tractable and in some cases even makes harvest scheduling models with minimum patch size constraints easier to solve.
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Document Type: Research Article
Publication date: 2014-12-13
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- Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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