Trends in terrestrial plant communities and landscape health indicate the effects of alternative management strategies in the interior Columbia River basin

Hemstrom, Miles A.; Korol, Jerome J.; Hann, Wendel J.

doi:10.1016/s0378-1127(01)00456-x

Cited by 42 publications

(51 citation statements)

References 11 publications

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“…De®nitions of each node and a brief summary of the source information are in Appendix A. Dashed nodes represent inputs projected from land management activities as described by Hemstrom et al (2001). 1995) may have profound effects. Larger scale habitat fragmentation and isolation from surrounding populations can also be important (e.g., Dunham and Rieman, 1999;Dunning et al, 1992).…”

Section: Structure Of Bbnsmentioning

confidence: 99%

“…Existing syntheses of landscape characteristics (Jensen et al, 1997), ®sh assemblages , and an interpretation of planned management activities based on the alternatives in the SDEIS (e.g., Hemstrom et al, 2001) represented the primary information available for our analyses. The biophysical coverages summarized to subwatersheds were obtained from the scienti®c assessment prepared for the project (Quigley and Arbelbide, 1997).…”

Section: Available Informationmentioning

confidence: 99%

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Evaluation of potential effects of federal land management alternatives on trends of salmonids and their habitats in the interior Columbia River basin

Rieman

Peterson

Clayton

et al. 2001

Forest Ecology and Management

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Aquatic species throughout the interior Columbia River basin are at risk. Evaluation of the potential effects of federal land management on aquatic ecosystems across this region is an important but challenging task. Issues include the size and complexity of the systems, uncertainty in important processes and existing states,¯exibility and consistency in the analytical framework, and an ability to quantify results. We focused on salmonid ®shes and their habitats as indicators of conditions in aquatic ecosystems and used Bayesian belief networks as a formal, quantitative framework to address the issues in our evaluation of land management alternatives proposed for the interior Columbia River basin. Because empirical information is limited at the scales relevant to our analysis, an ability to combine both empirical and more subjective information was key to the analysis. The representation of linkages through conditional probabilities made uncertainty explicit. We constructed two general networks. One represented the in¯uence of landscape characteristics and existing and predicted management activities on aquatic habitats. A second represented the in¯uence of habitat, existing biotic conditions, and for two anadromous species, ocean and migratory conditions, on the status of six widely distributed salmonid ®shes. In the long term (100 years) all three land management alternatives were expected to produce positive changes in the status and distribution of the salmonids and their habitats. Trends were stronger for habitat than for the status of salmonids because of greater uncertainty in linking the ®sh and habitat networks and constraints outside spawning and rearing habitat on federal lands in the study area. Trends were stronger for resident salmonids than anadromous forms because of additional effects of the migratory corridor assumed for the latter. Alternative S2, which approached ecosystem restoration more conservatively, generally produced the strongest positive changes, and alternative S3, designed to promote more aggressive restoration, the weakest. Averaged across the basin, differences among the alternatives were small. Differences were greater at ®ner temporal and spatial scales. In the short term (10 years) alternative S3 was expected to lead to further degradation in some areas. By formalizing our understanding and assumptions in these networks, we provided a framework for exploring differences in the management alternatives that is more quanti®able, spatially explicit, and¯exible than previous approaches. Published by Elsevier Science B.V.

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Section: Structure Of Bbnsmentioning

confidence: 99%

Section: Available Informationmentioning

confidence: 99%

Evaluation of potential effects of federal land management alternatives on trends of salmonids and their habitats in the interior Columbia River basin

Rieman

Peterson

Clayton

et al. 2001

Forest Ecology and Management

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“…VDDT was later improved into a spatially explicit model and called "Tool for Exploratory Landscape Scenario Analyses" or TELSA [125] [126]. VDDT was originally developed to simulate changes in vegetative composition and structure for Columbia River Basin [127]. And it has been used to evaluate fire regimes for all vegetation types throughout U.S. [128].…”

Section: Conclusion and Future Studymentioning

confidence: 99%

Long Term Effect of Major Disturbances on the Northern Mixed Grassland Ecosystem—A Review

Li¹,

Guo²

2014

OJE

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Grassland ecosystems in North America have been significantly altered through various disturbances from past to present. This paper has identified and examined major disturbances in the grassland ecosystems, which include grazing, fire and drought. A brief history of each disturbance is reviewed and its impact on the grassland ecosystem is discussed, by synthesizing previous research efforts available in the current literature. The paper intends to understand the grassland ecosystem from a comprehensive perspective and particularly tries to articulate the compound effect of the major disturbances in the same context instead of viewing them in isolations. It is concluded that a holistic understanding of the interaction between disturbances and plant communities is essential for sustainable grassland management, which demands comprehensive research effort in this area. The paper also points out the challenges we are facing in the current researches and suggests potential future improvement.

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“…State-and-transition models (STMs) incorporate effects of succession, management, and disturbance on relatively fine-scale vegetation composition (i.e., communities) and structure. The STMs have been used for many different types of landscape-scale assessments (e.g., Arbaugh et al 2000;Forbis et al 2006;Hemstrom et al 2001Hemstrom et al , 2007Merzenich et al 2003;Merzenich and Frid 2005;Weisz et al 2009). However, most STMs do not currently incorporate potential effects of climate change.…”

Section: Introductionmentioning

confidence: 99%

Integrating social, economic, and ecological values across large landscapes

Halofsky¹,

Creutzburg²,

Hemstrom³

2014

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Trends in terrestrial plant communities and landscape health indicate the effects of alternative management strategies in the interior Columbia River basin

Cited by 42 publications

References 11 publications

Evaluation of potential effects of federal land management alternatives on trends of salmonids and their habitats in the interior Columbia River basin

Evaluation of potential effects of federal land management alternatives on trends of salmonids and their habitats in the interior Columbia River basin

Long Term Effect of Major Disturbances on the Northern Mixed Grassland Ecosystem—A Review

Integrating social, economic, and ecological values across large landscapes

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