Introduction Ecosystems Nutrient cycling Energy flow Net Primary Productivity Spatial and temporal variability in net primary production Cryptogamic soil crusts as producers Factors limiting net primary productivity Food Webs Importance of detritus Animals as consumers Trophic levels Looping in food webs Production efficiencies and length of food chains Plant and Animal Biomass Ecosystem Structure Role of abiotic and biotic factors Evidence that biotic interactions regulate populations Succession in the Desert?
(producers Factors; limiting; net primary productivity Food Webs Importance of detritus Animals) (consumers Trophic levels; Looping; ) (biotic interactions; regulate; populations; L:in the Desert)
producers Factors consumers Trophic levels biotic interactions
limiting Looping regulate
net primary productivity Food Webs Importance of detritus Animals
populations L:in the Desert