Community Dynamics

Question 1

What is a community?

Answer 1

The group formed when all the different populations of species share the same habitat

Question 2

What represents the biodiversity of a habitat? Give examples.

Answer 2

ALL living things

• Bacteria
• Animals
• Fungi
• Plant
• Fish
• Insects

Question 3

Biodiversity is measured using what?

Answer 3

1. Species richness

2. Relative abundance

Question 4

Describe species richness.

Answer 4

• Used to measure biodiversity

- Total number of different species in the community

Question 5

Describe relative abundance.

Answer 5

• used to measure biodiversity

- The number of each species in relation to the total number of organisms in the community

Question 6

What makes for high biodiversity?

Answer 6

Species richness is high and the relative abundance of different species is similar

Question 7

What are the relationships between individuals of different species?

Answer 7

Interspecific interactions

Question 8

Name the types of interspecific interactions?

Answer 8

1. Competition
2. Predation (sub set-Paratism)
3. Mutualism
4. Commensalism

Question 9

What are interspecific interactions?

Answer 9

The relationships between individuals of different species

Question 10

What is symbiosis? Give examples.

Answer 10

Close and often long-term interaction between two or more different biological species

• Mutualism
• Parasitism

Question 11

Describe competition (interspecific interactions)

Answer 11

Relationship in which different species depend on the same limited resources such as light, food, water, and territory

Question 12

Who profits the best in a competition relation?

Answer 12

Usually the most well adapted species will profit the best from the available resources

Question 13

What is limited in competition relationships?

Answer 13

Strong competition can limit the presence of species

Question 14

Example of competition relationship

Answer 14

Plants in a forest where vegetation is dense must compete for light

Question 15

Describe predation (interspecific interactions)

Answer 15

When one species consumes another for food

Question 16

Predation includes who? (diet)

Answer 16

Herbivores and carnivores

Question 17

Predation: relationship between populations of predators and prey

Answer 17

pop. of predators affect pop. of prey

more pred., less prey
less prey, more pred

less pred, more prey
more prey, more pred

Question 18

Predation: how do prey defend themselves from predators?

Answer 18

Prey must be adopted to protect or defend themselves from predators

Question 19

Name a subset of predation

Answer 19

Parasitism

Question 20

Describe parasitism

Answer 20

Relationship in which one species profits from another species, which is harmed by the interaction. It is a form of predation.

Question 21

Does the parasite kill its host in a parasitism interaction? Why?

Answer 21

Usually a parasite does not kill its host because it needs the host to survive

Question 22

Example of parasitism interaction?

Answer 22

fleas that suck blood from animals

tapeworms that live in intestines and take valuable nutrients from them

Question 23

What are the types of symbiosis?

Answer 23

• Commensalism
• Mutualism
• Parasitism

Question 24

Describe commensalism

Answer 24

One species benefits and the other is unaffected. It is neither harmed nor benefited.

Question 25

Describe mutualism

Answer 25

A relationship in which two different species benefit and the relationship is mutually beneficial

Question 26

What can happen to a host in a parasitism interaction?

Answer 26

the host can become sick from the parasite or die