| |
NATIVE SPECIES |
INVASIVE SPECIES |
| DEFINITION |
Plants that have adapted to weather patterns, soil types, temperature extremes, and wildlife of a given region and have evolved to complement each other |
Non-native plants that out-compete native plants, spread rampantly, and alter the natural ecosystem |
| EXAMPLES (Western Oregon) |
- Douglas Fir
- Western HemlockRed Flowering Currant
- Oregon Grape
|
- English Ivy
- Common DandelionPeriwinkle
- Gorse
|
| WHY ARE THE PLANTS GOOD? |
- Provide food, shelter and a place to raise young for local wildlife
- Naturally resistant to local diseases, predators and parasitesAdapted to local water supply so it needs less water in the summerAdapted to local climate
- Don’t
need pesticides or fertilizer; keep water resources clean
|
|
| WHY ARE THE PLANTS BAD? |
|
- Out-compete native plants
- Have no natural predators to keep them in check Spread rampantly Alter ecosystem Often need pesticides and/or fertilizer which pollutes water resources Usually require extra water Drains water resources Creates erosion
- Damages native plants
|
| RESOURCES |
|
|
