4.11 - Biodiversity Flashcards
1
Q
What is an ecosystem?
A
All biotic and abiotic factors
2
Q
What is a species?
A
Organisms with similar appearance, anatomy, physiology, biochemistry and genetics that can interbreed freely to produce fertile offspring
3
Q
What is a habitat?
A
Where individuals of species live
4
Q
What is biodiversity?
A
- Plants
- Animals
- Fungi
- Microorganisms
- Their genes
5
Q
List abiotic factors
A
- Humidity
- Wind speed
- Temperature
- Light intensity
6
Q
List biotic factors
A
- Competition
- Pathogens/disease
- Animals
7
Q
Why sample?
A
- You can’t practically count every single organism
- Provides a representation of the number and distribution of an organism
- Must be sufficient samples to be representative
8
Q
List some equipment used to sample
A
- Tape measure
- Quadrats
- Trapping equipment for collection
- Identification sheets / keys
9
Q
Give the two types of quadrats
A
- Frame quadrats
- Point quadrats
10
Q
Give an advantage of using a point quadrat
A
Good for dense vegetation
11
Q
Give two disadvantages
A
- No good for plants taller than the frame
- Overestimates tall, thin plants
12
Q
Give two strategies to avoid bias in sampling
A
- Randomised sampling
- Systematic sampling
13
Q
Give two types of transect
A
- Line (single tape stretched in a straight line)
- Belt (strip 1m thick)
