Connections: Matter Cycling in Ecosystems

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Presentation transcript:

Connections: Matter Cycling in Ecosystems Biogeochemical cycles Hydrologic cycle (H2O) Carbon Cycle Nitrogen Cycle Phosphorous Cycle Sulfur Cycle Back to Essential Questions

How Do Ecologists Learn About Ecosystems? Field research - Ecologists do field research, observing and measuring the ecosystem structure and function. Remote sensing - New technologies such as remote sensing and geographic information systems (GISs) gather data that is fed into computers for analysis and manipulation of data. Computerized maps may be made of an area to examine forest cover, water resources, air pollution emissions, coastal changes, and changes in global sea temperatures. Laboratory research - Ecologist use tanks, greenhouses, and controlled indoor and outdoor chambers to study ecosystems (laboratory research). This allows control of light, temperature, CO2, humidity, and other variables. Field and laboratory studies must be coupled together for a more complete picture of an ecosystem.

Geographic Information System(GIS) Tracking the 1997-1998 El Niňo Topex / Poseidon http://maps.google.com/maps?ie=UTF-8&hl=en&tab=wl

Systems analysis develops mathematical and other models that simulate ecosystems that are large and very complex and can't be adequately studied with field and laboratory research. This allows the analysis of the effectiveness of various alternate solutions to environmental problems and can help anticipate environmental surprises. We need baseline data about components and physical and chemical conditions in order to determine how well the ecosystem is functioning in order to anticipate and determine how best to prevent harmful environmental changes. Define objectives Systems Measurement Identify and inventory variables Obtain baseline data on variables Make statistical analysis of relationships among variables Data Analysis Determine significant interactions Construct mathematical model describing interactions among variables System Modeling Run the model on a computer, with values entered for different variables System Simulation System Optimization Evaluate best ways to achieve objectives