Land Ecosystems

3. extent from side to side, or distance sideways from a given point or line
6. soil, rock or sediment that is frozen for more than two consecutive years
7. forests growing in high-latitude environments where freezing temperatures occur for 6 to 8 months and in which trees are capable of reaching a minimum height of 5 m and a canopy cover of 10%.
10. species plant species that can germinate and grow with limited resources
11. global ecosystem composed of living organisms
13. being in or facing the direction from which the wind is blowing
15. succession in which plants and animals recolonize a habitat after a major disturbance
17. Forest dense,green, moist forest with at least 160 inches of rain each year
18. the change in either species composition, structure, or architecture of vegetation through time.
19. area in which the vegetation is dominated by a nearly continuous cover of grasses

1. small shrubs, grasses, mosses, hedges, and lichens
2. the side that is sheltered from the wind
4. dry areas of land that receive an average of less than 250 mm of rain each year
5. succession in which plants and animals first colonize a barren, lifeless habitat.
7. areas classified according to the species that live in that location
8. simple graphics showing a location's monthly average temperature and monthly average precipitation for a one-year period.
9. space extended upward
12. effect a patch of land that has been forced to become a desert because mountain ranges blocked all plant-growing, rainy weather.
14. forest vegetation composed primarily of broad-leaved trees that shed all their leaves during one season
16. species describe the species that first colonize new habitats created by disturbance