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Flashcards in Ecology Deck (80):
1

A living plant animal or microbe is what

An organism

2

Define biodiversity

The diversity of a species in a given area

3

Define ecosystem

A community of organisms interacting with abiotic enviornmental factors

4

Result of burning and clearing of a tropical forest

Global warming would increase, less oxygen, decrease in biodiversity

5

Activities with negative impact on environment

Snow Avalanche, resurfacing a road, forest fire, nuclear explosion

6

Explain how top predators may increase the biodiversity of species lower on the food chain

Decreasing competition

7

Define non native species

Invasive, not normally found in the area, introduced into an area by humans

8

What is the most common explanation for population growth by a non native species

They have found many unoccupied niches

9

Which environmental factors are looked at when monitoring human pollution

Air quality, water quality, ocean currents

10

The maintenance of self sustaining ecosystem requires what

Cycling of materials between organisms and their environment

11

Why does each successive feeding level in a pyramid of energy have less biomass

Carnivore biomass is less than producer biomass as a result of energy being lost as it flows from producer to carnivore

12

What is the most likely succession in the repopulation of an aera

Lichens-grasses-shrubs-trees

13

What part of the ecosystem is not recycled through the earths ecosystems

Energy

14

Natural populations numbers increase and decrease around the carrying capacity when they reach a

Steady state

15

A group of similar looking organisms that breed with each other and produce fertile offspring make up a

Population

16

Invasive rabbit population increase what is logical reason

Few effective predators

17

Example of mutualism

E. coli bacteria living on human intestines

18

Example for parasitism

Heart worms in living dog

19

If a population grows larger than the carrying capacity

Death rate may rise

20

Nutrients move through the biosphere through

Biochemical cycles

21

Probably the most important factors affecting the distribution of biomes are

Climate and climax communities

22

De composers in nitrogen cycle AIDS in what

Restoration in nirogen compounds to the soil

23

What is the role of NO3 in the cycle

Used by plants for growth

24

Largest percentage of available energy found where on pyramid

Bottom

25

Growth rate

Birth rate to death rate

26

Biome with most biodiversity

Tropical forest

27

Exponential growth slows when

Resources become limited

28

The amount of energy in each tropic level of consumers is

10% of the level below it

29

Humpback whales and barnacles is example of

Communalism

30

Driving source for water cycle

Sunlight

31

What organism is responsible for nitrogen fixation

Bacteria

32

Nitrate return or soil

Decomposition

33

Role of species in community

Niche

34

Extinctions due today are becausw of

Loss of habitat

35

Detrivore

Feeds on dead animals

36

Biomass pyramid

Total mass of living tissue at each tropic level

37

What promotes competition in ecosystem

Limited resources

38

Water loss in stromata plants

Condensation

39

Dentrification

Nitrogen in soil goes back to atmosphere

40

Only eat producers

Herbivores

41

Primary succession

Community development in an essentially lifeless area with no soil remaining from the previous community

42

Secondary succession

Community development following the disturbance of a previously existing community (soil still there)
Ex forest fire flood

43

Pioneer community

First organism to move into new area

44

Climax

Last community to move in, stays same for very long, little change, highest species diversity

45

More diversity equals

More stable system

46

Dominant species

Species with most biomass

47

Keystone species

Removal has major effects
Ex kelp humans coral

48

What represents a dead end in food chain

Non native species

49

Population density

Number or organisms per area

50

Dispersion

Spacing of a population within an area

51

Uniform ex

Territorial animals
Black bears
Garden

52

Clumped

Bison
Pack herd animals

53

Random

Deer

54

Quadrat sampling

Known small area to count organisms smaller organisms larger area

55

Random sampling

Known number and randomly choosing sports

56

Line transept

Walk in straight line count as pass by

57

Mark and recapture

Capture tag release

58

Population growth rate

How fast population grows

59

Nataliry

Birth rate

60

Mortality

Death rate

61

Emigration a

Moving away from pop

62

Immigration

Moving into pop

63

Lag phase

No to slow growth

64

Exponential phase

Rapid uncontrolled growth

65

R strategists

Small organisms short life span produce many offspring
Controlled by density independent
Exponential growth

66

K strategists

Larger long life few offspring
Humans elephant follow logistic

67

Demography

Study of human pop

68

Pre reproductive

Under 20

69

Reproductive

20-44

70

Post reproductive

Above 44

71

Rapid

Fat to small graph

72

Slow growth is

Squiggly graph

73

No growth is s

Same size top bottom whole graph

74

Inter specific competition

Between organisms of same species

75

Predation

One organism feeds on other
How energy best recycled

76

Population

Particular species living Ina certain area

77

Community

Group of interacting populations that occupy same area

78

Ecosystem

Biological community with all the biotic and abiotic features

79

Organism affects biotic

Eats all food disease reproduction

80

Organism affects biotic

Breathe out co2