Why Do Worms Come Out In The Rain
Olivia Luz
That s a great observation.
The truth about drowning worms conventional wisdom holds that earthworms head to the surface after rain because they can t breathe. Oxygen diffuses easily through air and the soil stays aerobic because oxygen comes in from the surface but after a rain the soil pores and the worm burrows fill with water. In fact this is not true. Another explanation involves rain drop vibrations on the soil surface sounding similar to predator vibrations like that of moles.
There is a big chance that they can establish colonies in other areas at this time. When it rains worms sometimes leave their home in the soil and wiggle their way up to the surface where we see them on sidewalks and roads. An earthworm breathes oxygen by absorbing it through its moist skin. It likes damp soil but if the rain is very heavy the oxygen in the water logged soil may run out.
When the worms are in the ground the rain can saturate the ground and they end up drowning so they come up to the surface. Another theory explaining this distinct behavior of earthworms is that rainwater can cause the soil to become more acidic which is fatal for the species. On top of the wet ground the worm can breathe and wriggle along. Normally soil has a mix of air and water about 50 percent of the pore space in soil is air the rest is water.
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Earthworms often come to the surface to escape moles. According to sherman worms emerge when it rains in order to enter a more moist environment which allows them to take in more oxygen. Then the worm has to come up into the air to breathe. There are two likely explanations for this wormy question.
In fact because they require moisture to breathe through the skin worms can survive underwater for several days. Normally as you have observed coming above ground in the day means. Worms breathe through gas exchange absorbing oxygen directly through their skins. The answer to this question is not what you may think.
A common myth about worms is that they are forced to come out of their holes during the rain because they would drown if they stayed below.
Source : pinterest.com