Willamette Valley–Coast Range transition zone
E948845
The Willamette Valley–Coast Range transition zone is a geologic and ecological boundary region in northwestern Oregon where the lowland Willamette Valley meets the uplifted Coast Range, creating a mix of valley, foothill, and forested mountain landscapes.
Statements (36)
| Predicate | Object |
|---|---|
| instanceOf |
ecological boundary region
ⓘ
ecoregion transition zone ⓘ geologic boundary region ⓘ |
| borders |
Oregon Coast Range
NERFINISHED
ⓘ
Willamette Valley NERFINISHED ⓘ |
| characterizedBy |
ecotone conditions
ⓘ
gradual elevation increase from valley floor to Coast Range ⓘ mix of valley and mountain environments ⓘ |
| hasClimateGradient | transition from warmer drier valley climate to cooler wetter Coast Range climate ⓘ |
| hasEcologicalFeature |
edge habitats
ⓘ
mixed conifer–hardwood forests ⓘ mosaic of forest and agricultural lands ⓘ oak and prairie remnants ⓘ |
| hasEcologicalRole | boundary between Willamette Valley ecoregion and Coast Range ecoregion ⓘ |
| hasGeologicFeature |
alluvial valley sediments
ⓘ
uplifted Coast Range bedrock ⓘ |
| hasHydrologicFeature | small tributary streams flowing from Coast Range into Willamette Valley ⓘ |
| hasLandscapeType |
foothills
ⓘ
forested mountains ⓘ valley lowlands ⓘ |
| hasLandUse |
agriculture
ⓘ
forestry ⓘ rural residential development ⓘ |
| hasSoilType | mixture of valley alluvial soils and upland forest soils ⓘ |
| hasTopographicFeature |
dissected slopes
ⓘ
rolling foothills ⓘ |
| influences | species distributions between valley and Coast Range ⓘ |
| isImportantFor |
biodiversity conservation
ⓘ
connectivity between valley and Coast Range ecosystems ⓘ wildlife movement corridors ⓘ |
| locatedIn |
Oregon
ⓘ
United States of America ⓘ
surface form:
United States
northwestern Oregon ⓘ |
| partOf |
Oregon Coast Range foothills
NERFINISHED
ⓘ
Pacific Northwest region NERFINISHED ⓘ Willamette Valley NERFINISHED ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.