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    ECOSYSTEMS

A. INTRODUCTION

Biogeography

Global Vegetation
        Map from NASA
Image credit: NASA Visible Earth http://visibleearth.nasa.gov/view_rec.php?id=2430
Global Biomes Map from NRCS
Image credit: U.S. Department of Agriculture Natural Resources Conservation Service (2005) World soil resources map index. http://soils.usda.gov/use/worldsoils/mapindex/index.html

        Biome: a large assemblage of ecosystems with similar characteristics

        Ecosystem: a community of plants and animals and their non-living physical environment

        Ecosystem components linked by functions related to:


B. ECOSYSTEM PRODUCTIVITY

Autotrophs

Photosynthesis Link: photosynthesis animation

Respiration

Net Primary Productivity

June NPP
map: June npp map
image: npp map key

December NPP
map: December npp
Image credit: NASA Earth Observatory (2003) NASA satellite measures earth’s carbon metabolism. http://earthobservatory.nasa.gov/Newsroom/NPP/npp.html

map: limiting factors to npp
image: key for map of limiting factors
Image credit: NASA Earth Observatory (2003) Global garden gets greener. http://eobglossary.gsfc.nasa.gov/Study/GlobalGarden/

C. SEQUENCES OF CONSUMPTION

Producers

Consumers

Decomposers

Trophic level

Picture (500x309, 21.5Kb)

D. NUTRIENT CYCLING

Major Nutrients

Carbon Cycle Link to atmospheric CO2 animation (p. 294)


E. SUMMARY


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©Karen A. Lemke: klemke@uwsp.edu
Last revised October 28, 2009