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6. Why have the heterogeneity characteristics of natural riverine landscapes been masked in many regions?

  • Fishing
  • Pollution
  • There
  • Higher concern for the biodiversity

7. Name the next scale of river in this sequence... region, catchment, stream...

  • Riffle
  • Pool
  • Grain
  • Stream reach
  • Patch

8. Which of these dimensions includes the catchment?

  • Vertical
  • Lateral
  • Longitudinal

9. The lateral dimension of rivers is from...

  • Channel-->river itself
  • Headwaters--> estuary
  • Riffle-->pool
  • Aquifer-->channel

10. Which of these is NOT an example of a longitudinal dimension of a river?

  • Headwaters-->estuary
  • Parapotamon-->channel
  • Freshwater-->marine
  • Channel-->tributary
  • Riffle-->pool

11. What is the 4th dimension of rivers?

  • Temporal
  • Lonteral
  • Taderal
  • Aberal
  • Loteral

12. Hydrological exchange pathways are most diverse in...

  • Beads
  • String

13. The river is confined (eg. by a canyon or because water is moving downstream) in...

  • String
  • Beads

14. What are terraces?

  • Former floodplain surfaces
  • The streambed at the estuary
  • Grazing areas for animals
  • The current streambed

15. Floodplain reaches (the "beads") are expansive, with multiple channels and deep alliuvial deposits

  • True
  • False

16. Numerous on-channel lakes, falls and rapids (as opposed to lateral migration and a graded channel) describes a river in its..

  • Advanced stage
  • Youthful stage
  • Middling stage

17. The Immediate Disturbance Hypothesis...

  • Says that river dyanmics, by constraining competitive exclusion, is responsible in part for high biodiversity of upper Amazon basin
  • is added to by the Dynamic Equilibrium Model which brings in a resource dimension (productivity)
  • All of the above
  • Predicts low community diversity in environments exposed to high disturbance levels
  • Says that species diversity is highest in situations experiencing immediate levels of disturbance (Constraining competitive exclusion, allowing coexistence of taxa)

18. Biota are adapted to exploit the spatio-temportal heterogeneity engendered by natural disturbance regimes-- expanding resource gradient and temporal heterogeneity-- increasing potential for niche overlap

  • True
  • False