unit 1
Organisms that break down dead matter and help recycle nutrients (CED of 29)
decomposers
Species that migrate to a new environment and can potentially cause harm. (CED pg 72)
Invasive species
what is life expectancy? (CED pg. 65)
The average number of years a newborn is expected to live in certain conditions.
Atmospheric layer where temperature increases with altitude because ozone absorbs UV radiation. (CED pg 89)
Stratosphere
Agricultural technique that reduces erosion by plowing parallel to elevation contours. (CED pg. 99)
Contour plowing
Process where nitrogen gas is converted into ammonia (CED pg 37-38)
nitrogen fixation
Two species can not occupy the same niche forever. (CED pg 64)
Competitive Exclusion principle
The stage on demographic transition model that has low birth rates and low death rates. (CED pg 98)
Stage 4 (developed)
Boundary type where two types of plate tectonic collide and form mountain ranges. (CED pg. 77)
Convergent boundaries
Irrigation method that minimizes evaporation and directly waters roots. (CED pg 108)
Drip Irrigation
NPP is calculated by subtracting GPP (CED pg. 40)
Respiration
Theory stating that larger islands close to mainland support biodiversity heavily. (CED pg 73)
Island biogeography theory
Generalist need special environmental requirement. True or False. (CED pg. 62)
False
Process in which water passes through rock and replenishes underground aquifer. (CED pg 92)
Infiltration
What is clear cutting? (CED pg. 104)
Forestry practice involving removal of trees in a section at one time.
What leads to desertification? (CED pg. 178)
drought and overgrazing
Species that colonize barren land during primary succession. (CED pg 62)
Pioneer Species
A graph used to demographers to predict future population trends based on age.(CED pg 69)
Age Structure Diagram
What is the O Horizon? (CED pg 84j)
Soil horizon composed primarily of partial decomposed organic matter and humus.
A decrease in fish population due to ______ . (CED pg. 112)
Overfishing
A country produced 900 crops last year, and 1170 this year. What is the percent increase? (CED pg 34)
30%
A forest originally had 2400 hectares beofre urbanization reduced it to 1620 hectares. Calculate the percentage decrease of habitat loss. (CED pg. 75)
32.5%
Deer population increased from 480 to 624. Calculate percent growth. (CED pg. 68)
30%
A water hose receives 150cm of precipitation. If runoff equals 55cm and evaporates equa 60cm. Calculate infiltration. (CED 92)
35 cm
A fish production reproduces at 2400 fish per year, but 3100 fish are harvested annuall. What is the yearly population deficit. (CED pg. 113)
700 deficit