Presentation on theme: "Development of a Vegetation Classification System for the Northern Region Doug Berglund Renee Lundberg Renate Bush."— Presentation transcript:
Development of a Vegetation Classification System for the Northern Region Doug Berglund Renee Lundberg Renate Bush
Vegetation Analysis Support Needs: Broad & Mid-level Northern Region Overview Integrated Restoration and Protection Strategy Forest plan revision and amendments Ecosystem Assessment at the Watershed Scale Post-fire assessments Forest-wide cumulative effects analysis Ultimately all of this is to support project planning and informed decision making
Classification MappingInventory Analysis Components : Building Blocks
Vegetation classification, mapping, and inventory Integration of these related processes to communicate information. Vegetation classification What is it? Vegetation mapping Where is it? Vegetation inventory How much is there?
FGDC National Vegetation Classification: applicable over extensive areas repeatable consistent [between map and inventory] mutual exclusive and exhaustive categories hierarchical, aggregatable based on dominant or uppermost stratum mappable
Guiding Principles Existing Vegetation Classification and Mapping Technical Guide Canopy Cover Dominance Type Size Vertical Structure
Guiding Principles Practical - useful to those “practitioners”. Simple, easy to understand – line officers Can make calls in the field with minimal data Applicable to current data collection attributes
R1-Veg Council Veg Council Classification Builds on lessons learned from previous mapping efforts R1 Silviculturists, Fire Ecologists, Wildlife Biologists and RMRS Scientists Field workshop: Bitterroot, Lolo, IPNF
R1-Veg Council Classification Veg Council Classification Evaluated different classifiers, expecting to choose 1: Describe, FVS, others Consensus of expert opinion None of the classifiers had the “right” answers Developed new algorithms
Elemental Dominance # each species individually is > 20% of attribute A. Single most abundant species > 60% of attribute * ……… List single species A. Single most abundant species < 60% of attribute…..……. Go to B B. 2 most abundant species > 80% of attribute # ………………List 2 species B. 2 most abundant species < 80% of attribute # ……....……. Go to C C. 3 most abundant species > 80% of attribute # ……………….List 3 species C. 3 most abundant species < 80% of attribute # ……..……….Go to D D. Shade intolerant species attribute > shade tolerant species attribute….......IMIX D. Shade intolerant species attribute < shade tolerant species attribute…......TMIX * attribute = BA, if basal area > 20 ft 2 ; otherwise TPA, if trees per acre > 100; if BA <20 and TPA < 100 TPA, classify as “none”.
Elemental Dominance 847 elemental dominance types: requires aggregation into dominance “groups” for broad- and mid-level analysis
Definitions: Canopy cover is the proportion of the forest floor covered by the vertical projection of the tree crowns. Canopy closure is the proportion of the sky hemisphere obscured by vegetation when viewed from a single point.
Use: Increasingly used attribute Wildlife models Fire behavior models Mapping: Substitute attribute for basal area in Dominance and Size classification. FVS-model: Need to collect more field data – EM Variant Need to validate models
Canopy Cover Often requires collapsing into fewer classes for broad- and mid-level analysis Canopy cover classed as follows:
Based on proportion of total basal area in the following sizeclasses. There are 5 possible vertical structure classes: 1 = single story, 2 = two-story, 3 = three-story, C = continuous, none = insufficient ba/tpa found on the plot/stand. Initially, every plot/stand is classified as having 1 layer of vertical structure.