Conservation of Freshwater

Question 1

Freshwater systems include

Answer 1

Rivers, canals, ponds etc

Question 2

Threats include

Answer 2

Pollution, groundwater, eutrophication, runoff, high phosphate and nitrate

Question 3

Changes of freshwater habitat

Answer 3

Channelization occurs and accelerates water through an area, alters the flow, tunnels block out sunlight, steep concrete banks, can’t grow anything and if organisms can’t cope then they don’t survive

Question 4

Pond Case study

Answer 4

Looked at different habitats in Birmingham, wanted to investigate where ponds were found
Are ponds more valuable with different surrounding areas?

Question 5

Different types of ponds

Answer 5

T1: Macrophyte rich, open, low nutrients
T2: Concrete, macrophyte poor, high nutrient, urban
T3: Macrophyte rich, low nutrients, ephemeral
T4: Shaded, macrophyte poor, high nutrients, urban

Question 6

Otters case study

Answer 6

Low otter numbers due to persistent organochlorine, also accumulate in sediment and rivers
Legislation changed
Reintroduciton programme was introduced and otter numbers recovered