Ch. 2: Terrestrial Ecosystems and their Relationship to Cultivated Plants Flashcards Preview

Horticulture Science 1 > Ch. 2: Terrestrial Ecosystems and their Relationship to Cultivated Plants > Flashcards

Flashcards in Ch. 2: Terrestrial Ecosystems and their Relationship to Cultivated Plants Deck (19):
1

ecosystem

consists of a community of organisms in a physical environment, anywhere an organism my exist

2

competition

occurs when plants of the same or different species attempt to use a resource in limited supply

3

exclusion

when one needs resources, but none remain

4

crop ecosystem

only have one or few species without exploiting all of the resources in the environment

5

niche

exists when a resource is partitioned so that different portions of it are accessible only to certain species

6

herbivore

animal/organism that only consumes plants
ex. mollusks, anthropods, mammals, and birds

7

symbiotic associations

involves a permanent and close relationship/association between two organisms

8

mycorrhizae

the association (usually symbiotic) of fungi with the roots of some seed plants

9

Rhizobium

genus of bacteria that live symbiotically in the roots of legumes and fix nitrogen that is used by plants

10

paraiste

organisms that derive their nutrition by living in/on the tissues of other organisms; often causing disease (bacteria)

11

saprophyte

digest dead plant and animal material below the surface; essential to survival of ecosystem because they recycle nutrients

12

detritivore

earthworms, insects, etc.

13

succession

change in plant communities over time

14

biome

collection of ecosystems with similar climate, soil, and plant composition

15

Net Primary Productivity

carbon fixed minus the amount consumed by the plant and returned to the atmosphere through respiration

16

pioneer species

can survive under special conditions and tend to get displaced as the ecosystem develops

17

climax community

the theoretical endpoint of succession

18

alien species

invade natural ecosystems, when non-native plants are immune to local disease and take out the native plants of the ecosystem

19

human footprint

area used x intensity of use

an estimate of the land area required by an individual, a geographic area, a sociopolitical group, or world population taken as a whole