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Succession at Rotoiti

Succession at Rotoiti. Over the years there have been many fires in the St Arnaud area. Black Hill has experienced partial burning a number of times. This gives us the chance to see how the forest revegetation occurs in stages. Stage 1... Pioneer species colonise.

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Succession at Rotoiti

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  1. Succession at Rotoiti Over the years there have been many fires in the St Arnaud area. Black Hill has experienced partial burning a number of times. This gives us the chance to see how the forest revegetation occurs in stages

  2. Stage 1... Pioneer species colonise What plant species is first on the scene?

  3. Stage 1... Pioneer species colonise The environmental factors in this area : • Sunlight at ground level __________ • Soil moisture __________ • Temperature variation ___________ • Soil humus __________ • Dominant plant(s) _________________ These conditions allow _________ to grow quickly, followed by ___________ & _____________

  4. Stage 2... Early succession What plant has all but gone? What plant is taking over?

  5. Stage 2... Early succession The environmental factors in this area : • Sunlight at ground level __________ • Soil moisture __________ • Temperature variation ___________ • Soil humus __________ • Dominant plant(s) _________________ These conditions put an end to ________ But ___________ & _____________ do well Also _________________________ start to appear

  6. Stage 3... Mid succession What is this plant up here?

  7. Stage 3... Mid succession The environmental factors in this area : • Sunlight at ground level __________ • Soil moisture __________ • Temperature variation ___________ • Soil humus __________ • Dominant plant(s) _________________ ___________ & _____________ still do well Also _________________________ start to appear

  8. Stage 4... Late succession What is stuggling here? Why?

  9. Stage 4... Late succession The environmental factors in this area : • Sunlight at ground level __________ • Soil moisture __________ • Temperature variation ___________ • Soil humus __________ • Dominant plant(s) _________________ __________ gone & _____________ struggling to survive _______________________start to dominate the canopy

  10. Stage 5... Succession reaches the end

  11. Stage 5... Succession reaches the end The environmental factors in this area : • Sunlight at ground level __________ • Soil moisture __________ • Temperature variation ___________ • Soil humus __________ • Dominant plant(s) _________________ Early stage plants all gone Its all back to the original state, ieclimax community

  12. Summary • Grass takes off first because... • Manuka and kanuka turn up early because... • The manuka and kanuka lead to the disappearance of grass because... • But the manuka and kanuka lead to the appearance of broadleaf shrubs and then beech tree saplings because... • The beech trees then lead to the disappearance of firstly manuka and then later on kanuka because... • Now all is well in the forest!

  13. Primary succession

  14. Primary succession • The difference here is.....

  15. This beech has grown all wrong?

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