Heritage Woods Secondary
Floor Location : S 046 V
Plants are more alive than we think and our constant bombardment of city noise is silently having a detrimental effect on plants globally. Noise pollution is an environmental focus that needs more study. We already know that it can have negative effects on humans but did you know that it could also have a negative effect on plants? In humans, these effects can include things like hypertension, stress and hearing loss. Animals can be affected in many ways as well, for example, whales and other cetaceans can suffer from confusion due to excessive ship noise, which interferes with their sonar capabilities. The bombardment of manmade noise pollution is beyond what plants can handle, as it is outside the natural environmental sounds from animals, such as birds. This project looks at the behavioural science of plants in how they respond to the abiotic stressor; noise pollution. A frequency of 110Hz (independent variable) was played daily for 270 minutes over eleven days to a group of seedlings and their growth (dependent variable) was compared to a control group exposed to ambient noise absent the stressor frequency. The hypothesis was that the growth and physical appearance of seedlings would change negatively when exposed to an amplified frequency. The experimental results supported the hypothesis by showing that the experimental group had significantly more negative changes in growth and physical appearance, such as, weakened roots and stem and less robust leaf development. This experiment will demonstrate to the reader how frequency can negatively affect plants and will change one's perception of how growth rates are affected by noise pollution.