Abiotic nature of Rivers L.8 Flashcards
1
Q
Abiotic features of three river sections commonly recognized in temperate river systems.
A
Discharge, Velocity & Channel Morphology
2
Q
What does discharge, velocity and channel morphology influence?
A
Particle size
Nature of substrate
Channel morphology
Supply of dissolved oxygen
3
Q
what is channel morphology
A
The roughness of the substrate
4
Q
what does velocity determine
A
what kind of debris is deposited
5
Q
Example of Inorganic substrate
A
sand, silt, pebbles, bedrock.
Classified w/ wentworth scale.
6
Q
Whats Organic substrate
A
Anything biological
leaves, fallen trees, aquatic plants
7
Q
Key characteristics of lotic habitats
A
unidirectional flow Erosion & deposition High stream variability Linear form w/ changing gradients Complex variable channel
8
Q
What is a river
A
A channel of flowing water whose movement is determined by gravity.
