What do we call swimming organisms?

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Presentation transcript:

What do we call swimming organisms? Warm up #3 What do we call swimming organisms? In what zone of the lake is algae the primary producer?

Nutrients Rainwater runs off - dissolves and carries nutrients and sediment into lakes. Water carries with it silt, clay, organic matter, and nutrients in solution to enrich the aquatic ecosystem Human activities including road building, logging, mining, construction, and agriculture add to the amount of silt and organic matter

Nutrient status cont. Eutrophication- nutrient enrichment of an aquatic ecosystem Oligotrophication- nutrient reduction in an aquatic ecosystem

Oligotrophic System Deeper, steep sides Poorly developed littoral zone Clear blue water High in DO Poor in nutrients: phosphorous, nitrogen, and calcium Few organisms but a high diversity Very little organic matter

Pics of Oligotrophic Lakes

Eutrophic Systems Shallow Rich in organic matter and nutrients DO depletion in hypolimnion during summer due to decomposition Eventually will turn into a bog or marsh Lots of organisms, low diversity

Pics of eutrophic lakes