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File Case Study: Analysis of scale on boosted regression tree fish habitat models
Recent modeling efforts at the regional and FHP scale have indicated that smaller-scale models are likely necessary to pinpoint localized stressors. From discussions with experienced modelers and fishery professionals, HUC8 watersheds were agreed upon as the most appropriate scale. This report summarizes a case study that demonstrates the effect of scale on the assignment of stressors from predictive BRT models. Specifically, we modeled the same response at three different scales and for two separate HUC8 watersheds
Located in Projects / Downstream Strategies Project / Public working documents
Model Summaries for Small Streams Signature Fish Index: Score; Modified Index of Centers of Diversity: Score; Smallmouth Bass ( Micropterus dolomieu): Probability of Presence; Redhorse (Moxostoma spp.): Probability of Presence; Percent Intolerant Fish: Percent of Individuals; Great Rivers Species: Probability of Presence; Intolerant Mussels: Probability of Presence for the Ohio River Basin and Southeast Aquatic Resources Partnerships.
Located in Projects / Downstream Strategies Project / Public working documents
File text/texmacs Incorporating future climate and land use changes into aquatic habitat assessments
Case study that demonstrates how readily available downscaled climate change and land use development models can be incorporated into species distribution models to characterize potential future changes in aquatic conditions to better inform long-term conservation and restoration planning at the catchment level.
Located in Projects / Downstream Strategies Project / Public working documents
File Midwest and Great Plains Assessment Models Data Summary
The top five anthropogenic and top five natural variables from each model for each FHP and a regional model are summarized in this brief. This summary pinpoints only those variables that were most important in structuring the responses for each model. Across all models, each variable is tabulated for the number of times it is occurs as one of the most influential (top 5 of each category). This analysis presents the relative usefulness of the most important variables in structuring regional- and fhp-scale model responses
Located in Projects / Downstream Strategies Project / Public working documents
Image PNG image Phase 1 flow chart
Located in Projects / Downstream Strategies Project
File Preliminary Framework Concept: Inland fish habitat modeling for the North Atlantic Landscape Conservation Cooperative
Downstream Strategies is committed to a stakeholder-driven process to guide each phase of this project, we propose the following methodology as a potential template for much of the work for inland stream modeling. It is not our intention to dictate the process, but inform the NALCC stakeholders about a generalized methodology that has shown to be useful in the past, and that could be implemented for this project, should the stakeholders find that it would meet their objectives and expectations.
Located in Projects / Downstream Strategies Project / Public working documents
File ECMAScript program Project Overview Brochure
A two page brochure providing an overview of the NALCC aquatic habitat assessment project.
Located in Projects / Downstream Strategies Project
Public working documents
Documents relating the project process, methods, and data. These documents are meant to provide background information about various aspects of the modeling process.
Located in Projects / Downstream Strategies Project