BIO220H1 Study Guide - Genetic Variation, Penicillin, Model Organism
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BIO220H1 Full Course Notes
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Eutrophication is caused by continuous pollution in form of agricultural run off or sewage outflows, resulting in high n and p (essential for plant growth: nitrogen eutrophication occurs in inshore marine waters, phosphorus eutrophication occurs in freshwater. Algal bloom- exponential growth of algae due to high nutrients. Build up prevent sunlight from getting to other organisms beneath: 2. Algae (aka phytoplankton) are short lived and when dead, decomposed by bacteria that use up oxygen and release co2, detrimental to other organisms. Green algae (chlorophyta) exist when some oxygen is still present. Blue-green algae (cyanobacteria) lives in co2 rich waters. In the lab: 3 water treatments are studied (control, medium, high fertilizer: 2 species of each cyanobacteria and chlorophyta + s. molesta, the following is measured over time: Used to study the salinity of water (saltiness). Conductivity of each treatment will raise overtime (with some fluctuation) Dissolved oxygen- over fertilization can reduce levels. Nitrate- from fertilizer was used to see the effects.
