Unit 2: Freshwater Flashcards
1
Q
Freshwater species percentage?
A
6% of all species and 40% of fish
2
Q
Why does freshwater have a high percentage of biodiversity?
A
Freshwater sources are isolated, therefore they have a high endemism rate
3
Q
What is unique about freshwater habitats?
A
The size of the freshwater habitat does not reduce the number and abundance of species
4
Q
What are the four major threats to freshwater biodiversity?
A
Over-exploitation
Pollution
Flow modification
Invasion of non-native species
5
Q
Particular type of pollution?
A
Eutrophication
6
Q
Particular type of flow modification?
A
Dams
7
Q
Particular type of invasion by a non-native species?
A
Zebra mussels via outcompetition
8
Q
What are freshwater ecosystems high in?
A
Biodiversity and species richness
