Charles Lyons Ecocolumn Data Analysis Questions Soil and Water measurements 1. One of the plants in the lab did not grow at all after 10 days, so another plant replaced it. However that plant died. Over time, the plants grew at different rates with pea being the fastest and the alfalfa being the slowest. Towards the end, the plant heights decreased at certain points in time because the stem of the plant was broken, which meant decreased plant height. 2. The pH increased over time then remained constant because of the fish waste. There was a lack of changes because efforts were made to keep the pH at 7.5, so that the fish would be in optimal growth conditions. 3. The dissolved oxygen decreased over time because there were not any elodea plants in the aquatic chamber; photosynthesis did not occur at all. Therefore the amount of oxygen in the water decreased. 4. The nitrate and nitrite levels decreased over time. This happened because the water with fish waste increased because of the fish waste. However, the water was cleaned regularly after the first week and results show that there was little to no nitrate and nitrite in the water over time.
- Fall '19
- aquatic chamber