Unit 1: Ecosystem

Question 1

ecosystem

Answer 1

specific location with interacting biotic and abiotic features

Question 2

competitive exclusion principle

Answer 2

2 species competing for same resource can’t coexist

Question 3

resource partitioning

Answer 3

two species evolve to reduce limiting resource overlap

Question 4

competitive exclusion

Answer 4

inferior species driven to extinction

Question 5

what causes biomes?

Answer 5

biomes are categorized by combinations of average annual temp. and rain. different climates= different organisms

Question 6

albedo

Answer 6

the percentage of incoming sunlight reflected from a surface

ex: snow and ice reflect more than dark objects

Question 7

terrestrial biomes defined by:

Answer 7

• dominant plant growth forms
• 9 biomes
• temp and precipitation

Question 8

tundra

Answer 8

-underlying subsoil is permafrost: a permanently frozen layer of soil

Question 9

boreal forest

Answer 9

-subarctic biome with very cold climate & nutrient-poor soil

Question 10

temperate rainforest

Answer 10

• mild temp and high precipitation
• coastal biome
  ex: northern California to Alaska

Question 11

temperate seasonal forest

Answer 11

• warm summers, cold winters
• moderate rain
• eastern US

Question 12

woodland/shrubland

Answer 12

• common wildfires
• hot, dry summers & mild, rainy winters
  ex: southern California

Question 13

temperate grassland/cold desert

Answer 13

• harsh winters, dry summer
• lowest average rainfall
  ex: Great Plains

Question 14

tropical rainforest

Answer 14

• warm & wet biome
• highest biodiversity
• Amazon

Question 15

tropical seasonal forest/savanna

Answer 15

• warm temps and wet/dry seasons
• fertile soil, but low rain
  ex: Sub-Saharan Africa

Question 16

subtropical desert

Answer 16

• 30 degrees north, 30 degrees south

ex: Sahara Desert