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Compass: Mapping Oregon’s wildlife habitats - Metadata

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Aquatic Crucial Habitat

Layer definition: Prioritization of areas documented as containing priority species and/or important natural resources for the survival and reproduction of aquatic fish species.

Aggregation Method: Aquatic Crucial Habitat was aggregated using inputs from two crucial habitat input layers: Aquatic Species of Concern and Freshwater Integrity. The values from each data input layer were charted within a two dimensional matrix, and each potential score combination was assigned a specific Aquatic Crucial Habitat Priority Rank. The matrix can be observed in the following table. No data/null areas indicate that data was not available within the Freshwater Integrity data input layer.

Aquatic Species of Concern

Priority Rank Definitions

Priority 1: These areas have been documented as including both high priority fish species and a high amount of freshwater integrity (low degradation). This score requires one of the following potential combinations of data input layer priority levels: Aquatic Species of Concern and Freshwater Integrity are both 1; Aquatic Species of Concern is 1 and Freshwater Integrity is 2; Aquatic SOC is 2 and Freshwater Integrity is 1.

Priority 2: These areas have been documented as containing either high priority fish species or a high amount of freshwater integrity (low degradation). The other input layer was documented as being moderate. Potential combinations of data input layer priority ranks include: Aquatic Species of Concern and Freshwater Integrity are both 2; Aquatic Species of Concern is 1 and Freshwater Integrity is either 3 or 4; Aquatic Species of Concern is 2 and Freshwater Integrity is either 2 or 3; Aquatic Species of Concern is 3 and Freshwater Integrity is either 1 or 2.

Priority 3: These areas have been documented as containing a combination of high, moderate, or low ranks within the Aquatic Species of Concern and Freshwater Integrity input layers. Potential combinations of data input layer priority ranks include: Aquatic Species of Concern and Freshwater Integrity are both 3; Aquatic Species of Concern is 1 and Freshwater Integrity is 5; Aquatic Species of Concern is 2 and Freshwater Integrity is 4; Aquatic Species of Concern is 4 and Freshwater Integrity is either 1 or 2; Aquatic Species of Concern is 5 and Freshwater Integrity is 1.

Priority 4: These areas have been documented as containing a combination of moderate or low ranks (and no areas of the highest ranks) within the Aquatic Species of Concern and Freshwater Integrity input layers. Potential combinations of data input layer priority ranks include: Aquatic Species of Concern is 2 and Freshwater Integrity is 5; Aquatic Species of Concern is 3 and Freshwater Integrity is 4; Aquatic Species of Concern is 4 and Freshwater Integrity is 3; Aquatic Species of Concern is 5 and Freshwater Integrity is 2.

Priority 5: These areas are the second lowest priority rank of Aquatic Crucial Habitat, and contain a combination of moderate and low ranks of either Aquatic Species of Concern and Freshwater Integrity. Potential combinations of data input layer priority ranks include: Aquatic Species of Concern is 3 and Freshwater Integrity is 5; Aquatic Species of Concern is 4 and Freshwater Integrity is 4 or 5; Aquatic Species of Concern is 5 and Freshwater Integrity is 3.

Priority 6: This is the lowest rank of Aquatic Crucial Habitat. All areas within this rank contain an Aquatic Species of Concern priority rank of 5, and a Freshwater Integrity priority rank of 4 or 5.

Input Layer Definitions

Aquatic Species of Concern: Prioritizes areas based on fish species that are most susceptible to major effects from development, including those species that rely on extensive migratory routes and species endemic and rate within Oregon.

Freshwater Integrity: Measure of freshwater habitat condition, typically including landscape variables and land use variables that are known to impact aquatic ecological systems.

Data Sources: See aquatic crucial habitat input layers for specific data source documentation.

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