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Download Ecological succession - Orting School District
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Re-vegetation and Succession Field Investigation Repopulation of Mt Rainier debris flows Ecological succession • A fundamental concept in ecology • Refers to more-or-less predictable and orderly change in the composition or structure of an ecological community. • Succession may be initiated either by formation of new, unoccupied habitat or by some form of disturbance of an existing community. Climate Change As temperatures at Mount Rainier warm, glaciers like the Nisqually Glacier retreat. Retreating glaciers uncover sediments that provide materials for debris flows. Debris flow cause disturbance and lead to ecological succession. Climate Change • ..\..\..\..\Living with a Volcano in your Backyard\Carolyn's powerpoints and videos\2 Vol Process CD\Jiangjia Gully China debris flows Kevin Scott USGS.mpg • ..\..\..\..\Living with a Volcano in your Backyard\Carolyn's powerpoints and videos\2 Vol Process CD\front gros lahar.mpg Debris Flow Hazard Assessment Vallance, J., Cunico, M. and Schilling, S. (2004) U.S. Geological Survey Open-File Report 03-368. “Debris-Flow Hazards Caused by Hydrologic Events at Mount Rainier, Washington” Tahoma Creek debris flow 1988 2008 Photo by G. G. Parker USGS Tahoma Creek 2006 Tahoma Creek 2006 2009 Debris Flow Hazard Assessment Vallance, J., Cunico, M. and Schilling, S. (2004) U.S. Geological Survey Open-File Report 03-368. “Debris-Flow Hazards Caused by Hydrologic Events at Mount Rainier, Washington” Kautz Creek 1961 Kautz Creek New Channel Old Channel Debris Flow Hazard Assessment Vallance, J., Cunico, M. and Schilling, S. (2004) U.S. Geological Survey Open-File Report 03-368. “Debris-Flow Hazards Caused by Hydrologic Events at Mount Rainier, Washington” Twin Firs Trail Never had a debris flow -experimental control condition Climax Community One plant’s trash is another plant’s treasure Taking advantage of a little soil Ecological succession Ecological succession Story Board Homework NOW FUTURE ? Story Board Homework NOW FUTURE Experimental Question • As time passes after a debris flow, how does _____________________ change?
