CSES 50 00 Test 3 Wit h Solution 10 % Rule - ANSWER only 10% of a trophic levels biomass moves up to the next trophic level 90% - ANSWER lost as heat and waste Habitat Fragmentation - ANSWER Sectioning off of ecosystems that decreases corridirs and continuity Biomagnification - ANSWER Toxic substances become increasingly concentrated within organisms as they move up the food chain (deals with lipids) Keystone Species - ANSWER Single species that regulates an entire ecosystem N-Problems - ANSWER - species composition - biodiversity - decreased air quality - decreased water quality Solutions to N-Problems - ANSWER - denitrification - storage Residence Time - ANSWER The longer it is, the more N removal that occurs(flushing) Eutrophic System - ANSWER The best N remover when residence time is factored into the equation P - ANSWER The biggest factor in freshwater N removal Ecological Succession - ANSWER Steady development of an ecosystem through time Climax Community - ANSWER the end, or terminal, ecosystem Phenology - ANSWER a change in timing
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