Quantifying And Measuring Biodiversity Flashcards Preview

Biodiversity, Ecology And Conservation > Quantifying And Measuring Biodiversity > Flashcards

Flashcards in Quantifying And Measuring Biodiversity Deck (14)
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1

Why does more layers of vegetation mean higher diversity?

Different microclimates
More niches

2

What controls diversity

Physical structure
Resources
Competition

3

What happened to palace leas plot when fertiliser was added

Increased resources, encouraging dominant species, reducing the diversity

4

Examples of dominant plants

Nettle, bracken

5

How do you calculate plant dominance index

1. Growth rate
2. Potential height
3. Potential for lateral spread
4. Litter production
Given score of 1-5 for each, then summed up and halved to give score out of 10

6

with regards to dominance scores, where is diversity highest?

Areas with low dominance scores

7

What is hay rattle used for?

For diversification of upland meadows

8

What’s is diversity index?

The measure of the number of species/families and number of individuals of each (evenness)

9

What is richness?

Number of different species/families

10

What is the species area relationship

The larger the area the more species found in it

11

How is the number of species that will settle on an island estimated? (Optimum carrying capacity)

An equilibrium model is drawn, with immigration of new species and extinction of existing species is drawn, where they cross is the estimate

12

What is the relationship between island size and distance from mainland, to species richness

The larger the island the the lower the extinction rates, the further away the island the lower the immigration rates

13

The example of island biogeography is?

Rakata, all life was extinguished in 1883, environmental changes accompanied new ecosystems

14

What does Hawaii not have?

No freshwater fish, amphibians or reptiles, only 1 mammal, bat