crossword puzzle chpt.4

sunlight region near the surface of water
trees that produce seed-bearing cones that have thin leaves shaped like needles
dark layer of the oceans below the photic zone where sunlight does not penetrate
dense covering formed by the leafy tops of tall rain forest trees
type of succession that occurs in an area that was only partially destroyed by disturbances
area where an organism lives, including the biotic and abiotic factors that affect it
any necessity of life, such as water, nutrients, light, food, or space
physical and biological conditions in which an organism lives, and the way it uses these conditions
relationship in which two species live close together
symbiotic relationship in which both species benefit from the relationship
interaction in which one animal feeds on producers
average year-to-year conditions of tempt. & precipitation in an area over a long period of time
process in which certain gases trap sunlight energy in Earth's atmosphere as heat
day-to-day conditions of the atmosphere
abilities of an organism to survive and reproduce under circumstances that differ from their optimal conditions
first species to populate an area during succession
series of gradual changes that occur in a community following a disturbance
also called a boreal forest
kind of wetland formed where a river meets the ocean
layer of permanently frozen subsoil found in the tundra