Land Ecosystem

4. area of tall, mostly evergreen trees and a high amount of rainfall.
5. a barren area of landscape where little precipitation occurs
6. Species that arrive first in a newly created environment
8. a patch of land that has been forced to become a desert
9. a vast, flat, treeless Arctic region of Europe, Asia, and North America in which the subsoil is permanently frozen.
12. a graphic representation of the relation of two climatic elements (as temperature and humidity) plotted at monthly intervals throughout the year.
15. plant species that can germinate and grow with limited
17. a large open area of country covered with grass, especially one used for grazing.
18. the distance above sea level.
19. any ground that remains completely frozen
20. a number of people or things sharing a specified characteristic and following one after the other.

1. plants and animals recolonize a habitat after a major disturbance
2. the regions of the surface, atmosphere, and hydrosphere of the earth
3. a large naturally occurring community of flora and fauna occupying a major habitat, e.g. forest or tundra.
7. ecological succession that begins in essentially lifeless areas
10. vegetation composed primarily of broad-leaved trees that shed all their leaves during one season
11. he measurement of distance north or south of the Equator
13. the side or direction from which the wind is blowing.
14. the world's largest land biome
16. being in or facing the direction toward which the wind is blowing