4-2 What Shapes An Ecosystem?

Question 1

Biological factors definition

Answer 1

Biological influences on organisms within an ecosystem

Question 2

Abiotic factors definition

Answer 2

Physical or non living factors that shape ecosystems

Question 3

Biotic factors example

Answer 3

Birds, trees, mushroom, bacteria, ecological community

Question 4

Abiotic factors example

Answer 4

Wind, nutrient availability, temperature, sunlight

Question 5

What do the biotic and abiotic factors together determine?

Answer 5

The survival and growth of an organism and the productivity of the ecosystem in which organisms live

Question 6

Niche

Answer 6

Full range of physical and biological conditions in which an organism lives and the way in which organism uses those conditions

Question 7

How is food part of an organism’s niche?

Answer 7

It includes the type of food the organism eats, how it obtains food and which other species use the organisms as food

Question 8

Truth about niches

Answer 8

No 2 species can share the same niche in the same habitat

Different species can occupy niches that are very similar

Question 9

When does competition occur?

Answer 9

When organisms of the same or different species attempt to use an ecological resource in the same place at the same time

Question 10

Resource

Answer 10

Any necessity of life (nutrients, water, food, etc)

Question 11

What is often the result of direct competition in nature?

Answer 11

Losing organisms failing to survive

Question 12

Competitive exclusion principle

Answer 12

No 2 species can occupy the same niche in the same habitat at the same time

Question 13

Predation

Answer 13

An interaction in which one organism captures and feeds other organisms

Question 14

Predator

Answer 14

When predation occurs, the organism does the killing and eating

Question 15

Symbiosis

Answer 15

Any relationship in which 2 species live closely together

Question 16

Mutualism

Answer 16

Both species benefit from the environment

Question 17

Commensalism

Answer 17

1 member of the association benefits, other is neither helped nor harmed

Question 18

Parasitism

Answer 18

1 organism lives on or inside another organism and harms it

Question 19

Parasite

Answer 19

The organism from which a parasite obtains nutritional needs

Question 20

True for parasites

Answer 20

They generally weaken but do not kill the host
Obtain all or part of their nutritional needs from the host
Usually smaller than the host

Question 21

Ecological succession

Answer 21

Predictable changes that occur in a community over time

Question 22

Primary succession

Answer 22

On land, succession that occurs on surfaces where no soil exists

Question 23

Pioneer species

Answer 23

1at species to populate an area when primary succession begins

Question 24

Secondary succession follows when

Answer 24

A disturbance changes a community without removing the soil