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Ecological succession

Ecological succession. -- Changes in the composition or structure of an ecological community. Types of ecological succession:. Primary succession Secondary succession Seasonal (cyclic) succession. Successional modes. Primary succession. Secondary succession.

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Ecological succession

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  1. Ecological succession -- Changes in the composition or structure of an ecological community

  2. Types of ecological succession: • Primary succession • Secondary succession • Seasonal (cyclic) succession

  3. Successional modes Primary succession Secondary succession Ecological disturbance such as: Wildfire Pollution Storm Pioneer species colonize existing soilonce inhabited by other species • Cataclysmic disturbance • Pioneer species are adapted to extreme environments • Pioneer species make new soil so that other plants can eventually live there too

  4. Ecological succession Period of gradual ecosystem development Minor ecological disturbance Period of gradual ecosystem development

  5. Primary succession

  6. Secondary succession

  7. Ecological equilibrium • Also called dynamic or climax equilibrium • Environment is in a relatively steady state • Biological invasion must occur through competition alone

  8. Example: Hawai’ian Islands

  9. Ecological succession in Hawai’i • Chain of islands being actively formed • Oldest and largest island is the site of active volcanism

  10. Ecological succession in Hawai’i • Chain of islands being actively formed • Oldest and largest island is the site of active volcanism (CATA_______ EVENT)

  11. Ecological succession in Hawai’i • Chain of islands being actively formed • Oldest and largest island is the site of active volcanism (CATACLYSMIC EVENT)

  12. Ecological succession in Hawai’i • Chain of islands being actively formed • Oldest and largest island is the site of active volcanism (CATACLYSMIC EVENT)

  13. Ecological succession in Hawai’i • Chain of islands being actively formed • Oldest and largest island is the site of active volcanism (CATACLYSMIC EVENT) • Species colonizing nearest the volcanoes are _______ SPECIES

  14. Ecological succession in Hawai’i • Chain of islands being actively formed • Oldest and largest island is the site of active volcanism (CATACLYSMIC EVENT) • Species colonizing nearest the volcanoes are PIONEER SPECIES • Algae, lichens, moss, fungi, grasses

  15. Ecological succession in Hawai’i • Chain of islands being actively formed • Oldest and largest island is the site of active volcanism (CATACLYSMIC EVENT) • Species colonizing nearest the volcanoes are PIONEER SPECIES • Algae, lichens, moss, fungi, grasses • Pioneer species make ____

  16. Ecological succession in Hawai’i • Chain of islands being actively formed • Oldest and largest island is the site of active volcanism (CATACLYSMIC EVENT) • Species colonizing nearest the volcanoes are PIONEER SPECIES • Algae, lichens, moss, fungi, grasses • Pioneer species make SOIL

  17. Ecological succession in Hawai’i • Chain of islands being actively formed • Oldest and largest island is the site of active volcanism (CATACLYSMIC EVENT) • Species colonizing nearest the volcanoes are PIONEER SPECIES • Algae, lichens, moss, fungi, grasses • Pioneer species make SOIL PRIMARY SUCCESSION

  18. Ecological succession in Hawai’i • No cataclysmic events on older islands (Kauai, Oahu) in recent geologic history

  19. Ecological succession in Hawai’i • No cataclysmic events on older islands (Kauai, Oahu) in recent geologic history • Species colonizing existing habitats are performing _________ SUCCESSION

  20. Ecological succession in Hawai’i • No cataclysmic events on older islands (Kauai, Oahu) in recent geologic history • Species colonizing existing habitats are performing SECONDARY SUCCESSION

  21. Ecological succession in Hawai’i • No cataclysmic events on older islands (Kauai, Oahu) in recent geologic history • Species colonizing existing habitats are performing SECONDARY SUCCESSION Older islands are in a state of ECOLOGICAL ___________

  22. Ecological succession in Hawai’i • No cataclysmic events on older islands (Kauai, Oahu) in recent geologic history • Species colonizing existing habitats are performing SECONDARY SUCCESSION Older islands are in a state of ECOLOGICAL EQUILIBRIUM

  23. Ecological succession in Hawai’i ________ SUCCESSION – Mauna Loa/Hualalai saddle, Big Island

  24. Ecological succession in Hawai’i PRIMARY SUCCESSION – Mauna Loa/Hualalai saddle, Big Island

  25. Ecological succession in Hawai’i ___________ SUCCESSION – Kalaulau valley, Kauai

  26. Ecological succession in Hawai’i SECONDARY SUCCESSION – Kalaulau valley, Kauai

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