Hot lunch: The effect of temperature on lacewing feeding
Island Pacific School
Floor Location : J 133 V
Global warming might affect predators and their prey. A brown lacewing is an predatory insect that feeds on aphids. What I wanted to do was to see whether brown lacewings will eat more aphids at a higher or lower temperature. My hypothesis is that the brown lacewings will be more active and will eat more aphids at a higher temperature. The first thing I did was starve the lacewings for 24hrs. Then I took 10 plastic food cups and put 1 broad bean leaf, 10 aphids and one predator in each cup at each temperature. After that I put them into growth chambers set at four different temperatures. These temperatures were 10, 15, 20 and 25 Celsius. After that, I left those for 24hrs and then I took them out and counted how many were alive, dead and missing and recorded that on a sheet of paper. I looked at all of the data from the experiment and took the average from each section. I found out that lacewing larvae will eat more if the temperature is hot like 25c more than something like 10c. In my hypothesis it says that the lacewing larvae would eat more at a higher temperature than a lower one. So my results support my hypothesis. My results also show that predator-prey interactions could be affected by climate change.