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Name: _____________________________
Chapter 35: Population and Community Ecology
Vocabulary
population density: number of individuals of a particular species per unit area or
volume (Concept 35.1)
exponential growth: growth of a population that multiplies by a constant factor at
constant time intervals (Concept 35.2)
limiting factor: condition that restricts a population's growth, such as space,
disease, and food availability (Concept 35.2)
carrying capacity: number of organisms in a population that an environment can
maintain (Concept 35.2)
density-dependent factor: factor that limits a population more as population
density increases (Concept 35.2)
density-independent factor: factor unrelated to population density that limits a
population (Concept 35.2)
age structure: proportion of people in different age groups in a population
(Concept 35.3)
interspecific competition: competition between species that depend on the same
limited resource (Concept 35.4)
competitive exclusion: one species succeeding over another when the growth of
both species is limited by the same resource (Concept 35.4)
niche: unique living arrangement of an organism defined by its habitat, food
sources, time of day it is most active, and other factors (Concept 35.4)
predation: interaction in which one organism consumes another (Concept 35.4)
symbiotic relationship: close interaction between species in which one species
lives in or on the other (Concept 35.4)
parasitism: relationship in which a parasitic organism obtains its food at the
expense of a host organism (Concept 35.4)
mutualism: type of symbiotic relationship in which both organisms involved
benefit (Concept 35.4)
commensalism: symbiotic relationship in which one organism benefits, while the
other organism is neither harmed nor helped (Concept 35.4)
ecological succession: series of changes in the species in a community, often
following a disturbance (Concept 35.5)
primary succession: process by which a community arises in a virtually lifeless
area with no soil (Concept 35.5)
secondary succession: change following a disturbance that damages an existing
community but leaves the soil intact (Concept 35.5)
introduced species: species moved by humans to new geographic areas, either
intentionally or accidentally (Concept 35.5)
Name: _____________________________
Chapter 35: Population and Community Ecology
Vocabulary
1. population density:
2. exponential growth:
3. limiting factor:
4. carrying capacity:
5. density-dependent factor:
6. density-independent factor:
7. age structure:
8. interspecific competition:
9. competitive exclusion:
10. niche:
11. predation:
12. symbiotic relationship:
13. parasitism:
14. mutualism:
15. commensalism:
16. ecological succession:
17. primary succession:
18. secondary succession:
19. introduced species: