Why do worms come out onto the concrete when it rains?

Answer 1

Earthworm breath through their skin; however they can breath only in air, they will drown in water like most terrestrial animal. During huge rainfall, the water cannot drain away fast enough and thus the ground became waterlogged. Earthworm thus are in danger of drowning and have no choice but come to the surface to breath, despite the danger of predation. As to their coming out onto the concrete i think that they will naturally seek darker place and have an aversion for light; also they are more obvious on concrete and less so in grass which would explain why we tend to see them on concrete.

Answer 2

One often sees earthworms come to the surface in large numbers after a rainstorm. There are three theories for this behavior.

The first is that the waterlogged soil has insufficient oxygen for the worms, therefore, earthworms come to the surface to get the oxygen they need and breathe more easily. However, earthworms can survive underwater for several weeks if there is oxygen in it, so this theory is rejected by some.

Secondly, some species (notably Lumbricus terrestris) come to the surface to mate. This behavior is, however, limited to a few species.

Thirdly, the worms may be using the moist conditions on the surface to travel more quickly than they can underground, thus colonizing new areas more quickly. Since the relative humidity is higher during and after rain, they do not become dehydrated. This is a dangerous activity in the daytime, since earthworms die quickly when exposed to direct sunlight with its strong UV content, and are more vulnerable to predators such as birds.

Answer 3

in case you used a curing compound or membrane coating you'd be ok. To make your concrete truly solid, you ought to have had it lined upon end and initial set. Concrete continuously remedies and receives more advantageous in time, very nearly for infiniti. A concrete product kept in a damp enviroment, initially will be weaker than a concrete product uncovered to a short treatment. notwithstanding, in time, the moist product will surpass the skill of the fast treatment product. So at the same time as it rains, it is holding it moist, and for this reason it is curing slower. So imposing a load ontop of it would want to no longer be an outstanding idea, reckoning on the burden and such. So it comes right down to what you're searching at doing in the subsequent weeks or so.

Answer 4

They seek higher ground because underneath the ground is flooded. Not all of them make it back to the moist earth before they dehydrate and die...or get squashed....or eaten by a bird....

Answer 5

They are trying to get to an area with less water so they don't drown.

Answer 6

They will be drown if they stay in the soil.

Answer 7

they starte drowning underground