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Chapter 4

NOTE: THERE ARE NO SPACES IN PHRASES THAT HAVE MULTIPLE WORDS
Across
An area where an organism lives, including the biotic and abiotic factors that affect it
The symbiotic relationship in which one organism benefits and the other is neither helped nor harmed
The first species to populate an area during succession
An interaction in which one animal (the predator) captures and feeds on another animal (the prey)
The symbiotic relationship in which both species benefit from the relationship
The full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions
A series of gradual changes that occur in a community following a disturbance
Organisms that live attached to or near the bottom of lakes, streams, or oceans
Succession that occurs in an area in which no trace of a previous community is present
The average year to year conditions of temperature and precipitation in an area over a long period of time
Typically small organisms that drift in, and may swim through, aquatic environments; includes both phytoplankton and zooplankton
The layer in a rain forest found underneath the canopy formed by shorter trees and vines
Down
Material formed from leaves and other organic matter
A type of succession that occurs in an area that was only partially destroyed by disturbances
A dense covering formed by the leafy tops of tall rain forest trees
Environmental conditions within a small area that differ significantly from the climate of the surrounding area
The symbiotic relationship in which one organism lives on or inside another organism and harms it
A layer of permanently frozen subsoil found in the tundra
A biome with long cold winters and a few months of warm weather; dominated by coniferous evergreens; also caled boreal forest
A relationship in which two species live closely together
Any necessity of life, such as water, nutrients, light, food, or space
The process in which certain gases (carbon dioxide, methane, and water vapor) trap sunlight energy in Earth's atmosphere as heat
An interaction in which one animal (the herbivore) feeds on producers (such as plants)
A kind of wetland formed where a river meets the ocean
An ecosystem in which water either covers the soil or is present at or near the surface for at least part of the year