Land Biomes

3. a dense growth of trees in the northern biotic area characterized especially by dominance of coniferous forests
6. a plant or animal capable of establishing itself in a bare, barren, or open area and initiating an ecological cycle
7. everywhere on earth an organism can live
8. a dense growth of trees and underbrush covering a large tract where leaves drop off of most of the tree
11. a graphic representation of the relation of two climatic elements (as temperature and humidity) plotted at monthly intervals throughout the year
13. the largest geographic biotic unit, a major community of plants and animals with similar life forms and environmental conditions
14. a level or rolling treeless plain that is characteristic of arctic and subarctic regions
15. in the direction from which the wind is blowing
17. a relatively stable ecological stage or community especially of plants that is achieved through successful adaptation to an environment
18. the process of one community replacing another
19. a tropical woodland with an annual rainfall of at least 100 inches (254 centimeters) and marked by lofty broad-leaved evergreen trees forming a continuous canopy

1. a permanently frozen layer at variable depth below the surface in frigid regions of a planet
2. an ecological community in which the characteristic plants are grasses
4. a region of reduced rainfall on the lee side of high mountains
5. type of ecological succession in which plants and animals first colonize a barren, lifeless habitat
8. arid land with usually sparse vegetation
9. type of ecological succession in which plants and animals recolonize a habitat after a major disturbance
10. a measurement on a globe or map of location north or south of the Equator
12. in the direction to which the wind is blowing
16. measure of distance above sea level.