B5 - Abiotic Resources

abiotic factors

non living factors that affect the organism.

biotic factors

living factors that affect the organism

beneficial effect

effect that ultimately decreases reproductive success

harmful effect

a stres. effect that ultimately decreases reproductive success.

pulse effect

one time. limited impact (hurricane, storm, volcano)

push effect

continuous effects (light, temperature, soil texture)

soil textures

influence moisture retention, nutrient availability, microbial life.

jory soil

state soil of Oregon. dominant in the foothills of the Willamette Valley. Very productive. grows wheat, forest, wine.

nutrient cycle

nutrients grow vegetation, dead leaves and organic matter fall, decomposers release nutrients, roots take up nutrients

why are forests only found in habitats with a specific range of water availabilities and temperature.

Mesic conditions with moderate temperatures allow for long distance water transport and healthier trees. Mesic conditions without extreme temperatures enable plants to be long-lived and late successional species.

beneficial effects of light level on tree growth

gives information about environment that plants can respond to, gives energy for photosynthesis

harmful effects of light level on tree growth

can overload photosynthetic system and damage it. heat can cause light damage.

how do forest/resource managers use light in their operations

• dense stands(growth phase): shade

• foresters think stands, which brings more light to remaining organisms

• nurseries use light to grow plants for more favorable traits