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

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

Post on 18-Dec-2015

213 views

Category:

Documents

1 download

Embed Size (px)

TRANSCRIPT

<ul><li> Slide 1 </li> <li> Ecological succession -- Changes in the composition or structure of an ecological community </li> <li> Slide 2 </li> <li> Types of ecological succession: Primary succession Secondary succession Seasonal (cyclic) succession </li> <li> Slide 3 </li> <li> Successional modes Primary succession Cataclysmic disturbance Pioneer species are adapted to extreme environments Pioneer species make new soil so that other plants can eventually live there too Secondary succession Ecological disturbance such as: Wildfire Pollution Storm Pioneer species colonize existing soil once inhabited by other species </li> <li> Slide 4 </li> <li> Ecological succession Cataclysmic event Volcanic eruption Nuclear explosion Primary succession Pioneer species make new soil Lichens, fungi, algae Ecological equilibrium Niches are filled Relatively slow ecological change Secondary succession New species invade to fill available niches Minor ecological disturbance Period of gradual ecosystem development </li> <li> Slide 5 </li> <li> Primary succession </li> <li> Slide 6 </li> <li> Secondary succession </li> <li> Slide 7 </li> <li> Ecological equilibrium Also called dynamic or climax equilibrium Environment is in a relatively steady state Biological invasion must occur through competition alone </li> <li> Slide 8 </li> <li> Example: Hawaiian Islands </li> <li> Slide 9 </li> <li> Ecological succession in Hawaii Chain of islands being actively formed Oldest and largest island is the site of active volcanism </li> <li> Slide 10 </li> <li> Ecological succession in Hawaii Chain of islands being actively formed Oldest and largest island is the site of active volcanism (CATA_______ EVENT) </li> <li> Slide 11 </li> <li> Ecological succession in Hawaii Chain of islands being actively formed Oldest and largest island is the site of active volcanism (CATACLYSMIC EVENT) </li> <li> Slide 12 </li> <li> Ecological succession in Hawaii Chain of islands being actively formed Oldest and largest island is the site of active volcanism (CATACLYSMIC EVENT) </li> <li> Slide 13 </li> <li> Ecological succession in Hawaii 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 </li> <li> Slide 14 </li> <li> Ecological succession in Hawaii 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 </li> <li> Slide 15 </li> <li> Ecological succession in Hawaii 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 ____ </li> <li> Slide 16 </li> <li> 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 Ecological succession in Hawaii </li> <li> Slide 17 </li> <li> 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 Ecological succession in Hawaii PRIMARY SUCCESSION </li> <li> Slide 18 </li> <li> No cataclysmic events on older islands (Kauai, Oahu) in recent geologic history Ecological succession in Hawaii </li> <li> Slide 19 </li> <li> No cataclysmic events on older islands (Kauai, Oahu) in recent geologic history Species colonizing existing habitats are performing _________ SUCCESSION Ecological succession in Hawaii </li> <li> Slide 20 </li> <li> No cataclysmic events on older islands (Kauai, Oahu) in recent geologic history Species colonizing existing habitats are performing SECONDARY SUCCESSION Ecological succession in Hawaii </li> <li> Slide 21 </li> <li> No cataclysmic events on older islands (Kauai, Oahu) in recent geologic history Species colonizing existing habitats are performing SECONDARY SUCCESSION Ecological succession in Hawaii Older islands are in a state of ECOLOGICAL ___________ </li> <li> Slide 22 </li> <li> No cataclysmic events on older islands (Kauai, Oahu) in recent geologic history Species colonizing existing habitats are performing SECONDARY SUCCESSION Ecological succession in Hawaii Older islands are in a state of ECOLOGICAL EQUILIBRIUM </li> <li> Slide 23 </li> <li> Ecological succession in Hawaii ________ SUCCESSION Mauna Loa/Hualalai saddle, Big Island </li> <li> Slide 24 </li> <li> Ecological succession in Hawaii PRIMARY SUCCESSION Mauna Loa/Hualalai saddle, Big Island </li> <li> Slide 25 </li> <li> Ecological succession in Hawaii ___________ SUCCESSION Kalaulau valley, Kauai </li> <li> Slide 26 </li> <li> Ecological succession in Hawaii SECONDARY SUCCESSION Kalaulau valley, Kauai </li> </ul>