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Name: eee105 Password: prAIRie

Ecology of freshwaters Lakes, rivers, and streams Limnology Lakes are born by catastrophe age, and quietly die rivers, and streams

Limnology Rivers are ancient Rivers carry sediment

Limnology Rivers are ancient Rivers carry sediment meander

Limnology A river creates its valley Rivers are ancient Rivers carry sediment meander

Limnology Estuaries

Limnology Lakes & rivers differ in food chains Lakes support photosynthetic chains CO 2 + water sugars phytoplankton Energy is autochthonous

Limnology Lakes & rivers differ in food chains Rivers support a detritus food chain Energy is allochthonous

Limnology Lakes are stratified in temperature a summer lake

Limnology Lakes are stratified in temperature wind epilimnion mixes hypolimnion stagnates a summer lake

Limnology Lakes are stratified by light photosynthesis detritus decomposition nutrient rich sediment a summer lake

Limnology Lakes are stratified There are 2 lakes productive epilimnion detritus food chain releasing nutrients during warm phytoplankton starved for nutrients a summer lake months

Limnology In the fall surface water cools 4 0 C water sinks fall turnover phytoplankton blooms nutrients returned wind to epilimnion

Limnology In the fall surface water cools 4 0 C water sinks fall turnover phytoplankton blooms nutrients returned wind to epilimnion

Limnology In the winter ice lake is sealed

Limnology In the spring spring turnover nutrients mixed into epilimnion phytoplankton bloom wind

Limnology Lake food chain phytoplankton zooplankton nekton

Limnology Zooplankton migration

Limnology The Lake as a Microcosm -- Steven J. Forbes

Limnology An ecosystem united seasonally