Download e-book for iPad: A Guidebook for Integrated Ecological Assessments by Mark E. Jensen, Patrick S. Bourgeron

By Mark E. Jensen, Patrick S. Bourgeron

ISBN-10: 0387985832

ISBN-13: 9780387985831

ISBN-10: 1441986200

ISBN-13: 9781441986207

Ecosystem administration calls for a making plans and decision-making strategy that locations land use in its acceptable ecological context. simply because ecological checks needs to be carried out at quite a few spatial scales and throughout jurisdictional limitations, techniques to review needs to be appropriate and in line with one another. A Guidebook for built-in EcologicalAssessment analyzes equipment and gives criteria and protocols for evaluate and the combination of data.

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Extra info for A Guidebook for Integrated Ecological Assessments

Example text

Often this can be done by identifying the pattern of interest and moving up one scale in selecting the pattern that will be described in assessment or monitoring efforts. , Douglas fir forests) as an initial screening mechanism to identify potential areas of plant association change. The spatial area that could be described by this approach, for the same level of funding, is much larger than that which could be described continuously at the plant association level. In this example, areas that exhibit change at the series level would be prioritized for more detailed study to better understand plant association pattern relations in an assessment area.

It is important to clarify what is meant by resilience and stability before ecosystem response to change can be assessed. In light of the nonlinear, hierarchical, and nonequilibrium characteristics of ecosystems, assessment protocols must be designed and interpretations made using consistent terminology. 2 Ecosystems Can be Viewed Spatially and Temporally within Organizational Levels The concepts of scale and pattern are interwoven (Hutchinson, 1953; Levin, 1992). , 1986). , 1991). In recent years, considerable attention has been directed to describing the formal hierarchical organization of ecological systems.

However, the ability to predict a pixel's state over time from one scene to the next decreases. This is intuitively reasonable. Landscapes usually display positive spatial autocorrelation, which decays with distance. Thus, as grain size decreases, each pixel represents a smaller area, and the states of neighboring pixels should be more strongly correlated, allowing greater spatial predictability. , decreasing temporal predictability). Spatial resolution of the data should be chosen to yield an appropriate balance between spatial and temporal predictability.

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A Guidebook for Integrated Ecological Assessments by Mark E. Jensen, Patrick S. Bourgeron

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