Unit 5 - Ecology & Plants Flashcards Preview

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Flashcards in Unit 5 - Ecology & Plants Deck (37)
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1

biotic factor

living things within an ecosystem

2

Nitrogen cycle

a process that recycles nitrogen through an ecosystem; steps include nitrogen fixation, nitrification, assimilation, ammonification & denitrification

3

water cycle

examples are condensation, precipitation & evaporation

4

pioneer community

the first organisms to establish themselves in a community

5

abiotic factors

nonliving parts of the ecosystem

6

primary succession

community that occurs on inorganic material like rock

7

secondary succession

a well established community; it gets destroyed (fire,flood,etc); the community grows back

8

biosphere

portion of the earth that supports life

9

biome

large geographic area of similar climate & life forms

10

density-dependent factor

environmental element whose effects are determined by population density; predation,disease, parasitism

11

density-independent factor

environmental element whose effects are NOT determined by population density; natural disaster, clear cutting of a forest

12

limiting factor

a reason for a decrease in population size; not enough food, shelter, water, space, or disease, natural disaster, habitat loss/destruction

13

greenhouse effect

natural situation in which heat is retained by a layer in the atomosphere

14

carnivore

animal that only eats meat

15

commensalism

symbiotic relationship in which one organism benefits & the other is not hurt (unaffected)

16

food web

consists of interconnected food chains within an ecosystem; how energy flows through an ecosystem

17

decomposer

organism that breaks down dead tissue &returns it back into the soil; fungi & bacteria; usually the trophic level to be left out of a food chain/web; AKA saprobe

18

ecology pyramid

a graphical representation designed to show the biomass or bio productivity at each trophic level in a given ecosystem

19

ecology

literally translates to "the study of the house"; the study of the relationships of living things to their environment

20

ecosystem

organisms interacting with their physical environment; all the living things, from plants and animals to microscopic organisms, that share an environment

21

habitat

an area in which an organism lives

22

herbivore

animal that eats only plants

23

mutualism

symbiotic relationship in which both organisms benefit

24

nitrogen fixation

process by which atmospheric nitrogen is incorporated into compounds that plants can use

25

community

population of different species interacting in an area

26

carrying capacity

maximum individuals in a species that the environment can support

27

producer

autotroph; organism that makes it's own food

28

food chain

1 possible feeding relationship

29

trophic level

feeding level within an ecosystem

30

symbiosis

a relationship where 2 organisms live
together