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4 biome with enough average annual precipitation (at least 76 centimeters,or 30 inches) to support growth of various species of trees and smaller forms of vegetation
6 'producer'
8 the variety of forests, deserts, grasslands, oceans, streams, lakes, and other biological communities interacting with one another and with their nonliving environment.
9 removal of trees from a forested area without adequate replanting
11 Land along a coastline, extending inland from an estuary that is covered with salt water all or part of the year. Examples are marshes, bays, lagoons, tidal flats, and mangrove swamps
12 organism that breaks down organic matter
13 terrestrial regions inhabited by certain types of life, especially vegetation. Examples are various types of deserts, grasslands, and forests
14 sequential development of communities in a bare area that has never been occupied by a community of organisms
15 variety of different species (species diversity), genetic variability among individuals within each species (genetic diversity), and variety of ecosystems (ecological diversity)
16 most common type in nature; begins in a predominantly inorganic environment and is characterized by early and continued dominance of green plants
18 maximum population of a particular species that a given habitat can support over a given period of time
21 sequential development of communities in an area in which natural vegetation has been removed or destroyed but the soil is not destroyed
23 symbiotic relationship between two organisms of different species, in which one of the organisms benefits while the other remains unaffected
25 species that normally live and thrive in a particular ecosystem
1 biome found in regions where moderate annual average precipitation (25 to 76 centimeters, or 10 to 30 inches) is enough to support the growth of grass and small plants, but not enough to support large stands of trees
2 a permanently frozen, treeless expanse between the ice cap and tree line of arctic regions
3 two or more individual organisms of a single species (intraspecific competition) or two or more individuals of different species (interspecific competition) attempting to use the same scarce resources in the same ecosystem
5 formation produced by massive colonies containing billions of tiny coral animals, called polyps, which secrete a stony substance (calcium carbonate) around themselves for protection. When corals die, their empty outer skeletons form layers
7 characterized by early dominance of heterotrophs; occurs in cases where environment is primarily organic
10 adjustment to slowly changing new conditions
17 complex network of many interconnected food chains and feeding relationships
19 a group of organisms interrelated by the fact that each member of the group feeds upon the one below it
20 the sum of all living organisms in a given area.
22 place or type of place where an organism or a population of organisms lives
24 the movement of organisms from one place to another
26 study of the interactions of living organisms with one another and with their nonliving environment of matter and energy; study of the structure and function of nature
27 living organisms that predators feed on
28 organism that cannot synthesize the organic nutrients it needs and gets its organic nutrients by feeding on the tissues of producers or of other consumers; generally divided into primary consumers (herbivores), secondary consumers (carnivores)
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