Biodiversity

Question 1

Define Biodiversity

Answer 1

Diversity of species & ecosystems

Question 2

What is used to determine the diversity of species in an ecosystem

Answer 2

Different measures are used such as species richness, relative species abundance, percentage cover, percentage frequency, SDI

Question 3

Describe Species Richness

Answer 3

Species Richness is the number of species in an ecosystem. A pro can be easily counting from spread

Question 4

Describe Relative Species Abundance

Answer 4

Relative species abundance is how many of each species are present. A pro can be easily see ecosystem with dominant species however, a can may be how it would be difficult to count

Question 5

Describe Percentage cover

Answer 5

Percentage cover is the percentage of quadrat a species is occupying. A pro is that this measure is good for grasses and plants.

Question 6

Describe Percentage frequency

Answer 6

proportion of quadrats that contained a particular species. A con for this measure is clumping - the probability a species will be found in a single quadrat

Question 7

Describe SDI

Answer 7

Accounts for both species richness and relative species abundance

Question 8

What are abiotic factors and give examples

Answer 8

Abiotic factors are the non-living components of an ecosystem. These include; temperature, light intensity, rainfall, water, texture and pH of soil/water

Question 9

What are biotic factors and give examples

Answer 9

Biotic factors are the living components of an ecosystem and their activities. These include; producers, consumers and decomposers such as animals, humans and plants.

Question 10

Define species

Answer 10

Species are a group of organisms that share gene pool

Question 11

Define ecosystem

Answer 11

Ecosystem are different species working together