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Ecological Succession

Ecological Succession. Reading Exercise. Refer to Hong Kong Vegetation Ecology (Chinese Article) on P.6 and P.7 Circle all the vegetation mentioned. scrubland. woodland. Badland. A scene of Hong Kong hill in the good old days!. SUCCESSION IN HONG KONG. Badland. weed. Pioneer species.

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Ecological Succession

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  1. Ecological Succession

  2. Reading Exercise • Refer to Hong Kong Vegetation Ecology (Chinese Article) on P.6 and P.7 • Circle all the vegetation mentioned

  3. scrubland

  4. woodland

  5. Badland A scene of Hong Kong hill in the good old days!

  6. SUCCESSION IN HONG KONG Badland weed Pioneer species More diverse than weed scrubland climax More diverse than scrubland woodland

  7. What is ecological succession? • The repeated replacement by another usually more diverse community of organisms over a period of time

  8. Model on Ecological Succession(Outside Hong Kong)

  9. Types of Succession

  10. Internal Changes during Succession • Soil stabilization by pioneer species • bind soil particles by root action • prevent the rain splash action and wind erosion Soil stabilization by pioneer species • Modification of Climatic Environment • HOW? • Improvement of Soil Structure and SOM • HOW?

  11. Microclimate Modification • Light intensity • temperature • wind speed • RH • Interception by rainfall

  12. Improvement of Soil Structure and SOM • More litter -> more organic matter • organic matter can: • hold more water • hold more nutrient • improve soil structure

  13. Refer to P.12 Stages in Succession, complete the table for the dynamic changes within the ecosystem in the process of succession.

  14. SUCCESSION IN HONG KONG Badland Would the process reverse? weed Pioneer species More diverse than weed scrubland More diverse than scrubland woodland

  15. Would reversed succession take place? • Yes • retrogressive succession

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