Animal species that have the UV cones take advantage of the darkness to feed. This is the case, for example, of some fish, snails and reptiles. A recent study found that the exponential evolution of lighting public spaces makes these increasingly vulnerable animals. At the same time, the results of this study underline increased visibility of predators by artificial light.
Conducted by scientists at the University of Plymouth, this is the first study to analyze the effect of artificial night light (ALAN) on coastal species. These would make animals of the night more noticeable and sensitive. They then become more vulnerable to hunters and other predators.
The researchers exposed shoreline snails to predators in two forms of lighting. This is the old lighting known as low pressure sodium (LPS) and advanced lighting high pressure sodium (HPS) and others.
Artificial lights expose prey
The researchers noted good camouflage of animal species under low intensity lighting. Conversely, when lighting at high intensity, snails of yellow colors become much more visible.
“As technologies develop, there has been a shift from narrow spectrum to lighting that allows us to live and travel in a safe and secure way. Some forecasts indicate that LED bulbs will account for 85% of the global public lighting market. »
Dr. Thomas Davies
Thereby, dcoastal species that feed at night risk of disappearand in the near future.
Reduce artificial lighting in favor of natural lighting?
23% of the earth’s surface is artificially lit. In order to preserve the environment and its components, the researchers suggested a number of actions to reduce artificial lighting.
They recommend the use of mitigation methods local planners and environmental managers. They also suggest the use of narrow spectrum lighting.