Biodiversity - Unit 3: Topic 1: Subtopic 1

Question 1

Define Species Richness.

Answer 1

Species Richness is the number of different species in a particular area.

Question 2

Define Species Evenness/ Abundance.

Answer 2

The Number of individuals of a particular species in a area in relation to total number of all individual species in an area

Question 3

Percentage Coverage

Answer 3

The estimate abundance of organisms generally plant

Question 4

Percentage Frequency

Answer 4

A measure of frequency of plant species within sample quadrats

Question 5

Simpson’s Diversity Index (SDI)

Answer 5

Considers species richness and abundance

SDI=1−(Σn(n−1)/N(N−1))

Question 6

Define the term ‘Biotic Factor’

Answer 6

Living factors which impact another organism within an Ecosystem (Plants, animals, bacteria).

Question 7

Define the term ‘Abiotic Factor’

Answer 7

Non-living factors which impact another organism within an Ecosystem (Water, Soil, pH Levels etc.)

Question 8

What are the 5 measures of species diversity?

Answer 8

% cover, % frequency, species richness, species evenness (relative to species abundance), SDI (Simpsons Diversity Index)

Question 9

State the 3 Symbiotic Relationships

Answer 9

Parasitism, Mutualism, and Commensalism

Question 10

Define the Species Interaction of ‘Competition’

Answer 10

An interaction amongst organisms/species which require a scarce resource such as food.

Question 11

Compare the terms ‘Predator’ and ‘Prey’

Answer 11

Predators eat another organism, while a Prey is the organism which the Predator eats.

Question 12

Compare Parasitism and Mutualism

Answer 12

Parasitism os when one specie benefits at the expense of another. Mutualism is when both species benefit through association.

Question 13

Define the term ‘Commensalism’

Answer 13

One specie benefits with the other species being neither harmed or benefitted.