Notes Essay

346 Words2 Pages
Energy in Ecosystems Notes Living components (biotic) Non-living components (abiotic) An Ecosystem is made of natural units between biotic and abiotic and how they interact. The two main processes central to ecosystem function are energy flow and chemical cycling. Word equation processes, include the energy source, raw materials, and waste products: 1) a) Photosynthesis: 6 CO2 (gas) + 12 H2O (liquid) + photons → C6H12O6 (aqueous) + 6 O2 (gas) + 6 H2O (liquid) Carbon dioxide + water + light energy → glucose + oxygen + water b) Respiration: C6 H12 O6 + 6O2 --> 6CO2 + 6H20 + energy Glucose Oxygen ---> Carbon Dioxide + Water + Energy 2) Ecosystems require a constant input of energy from an external source (the sun) because it keeps the energy between the biotic and abiotic recycled also the chemical elements such nitrogen, phosphorus and carbon dioxide. 3) In Photosynthesis, plants use the sun's energy as light to transform carbon dioxide and water into glucose. In cellular respiration, glucose is ultimately broken down to yield carbon dioxide and water, and the energy from this process is stored as ATP molecules. Food Chains Every ecosystem has a trophic structure (base on their sources of nutrient): a hierarchy of feeding relationships, which determines the pathways for energy flow and nutrient cycling. Pesticides and bioaccumulation Substances: pesticides, radioactive isotopes, heavy metals and industrial chemicals, can consume by organisms via food chain or absorbed from surrounding. Toxicity: Toxicity is the degree to which a substance can damage an organism. Specificity: Biodegradable: a substance that is capable of being decomposed by bacteria or other living organisms. Bioaccumulation: (biological magnification) substances accumulate in a biological system over time. Contact Chemicals: effectives when

More about Notes Essay

Open Document