When you look at a worm you can be forgiven for not knowing which end is which. However, and as you would expect, one end is definitely the head and for this article this is the end we are interested in.
Illustration of the inside of a worm |
To make sense of this earthworms have been split into three different categories. The first are the surface dwellers, the Epigeic worms. Then there are the upper soil worms, the Endogeic worms. Finally, there are the deep burrowing species, the Anecic
Surface and upper surface worms ( Epigeic and Endogeic worms) will eat a variety of organic materials, such as dead grass, any other larger leaf material, and even decaying animals! However there are a huge variety of microscopic organisms that also live on these food sources. This allows earthworms to not only feast on the decaying matter, but also on a 'balanced diet' of algae, fungi and bacteria - essential for a worms healthy lifestyle!
The deep burrowing species (the Anecic worms) live deeper under the ground have a diet that is primarily raw soil, but these worms survive once again by digesting the bacteria, fungi and algae found living there.
The soil passes through the worm and comes out as what is known as worm casts. This is a nicer way of saying worm poo! However, these casts are also beneficial to your garden plants due to their nutritional value. In their search for food worms also naturally aerate the soil, improving the root environment for your plants.
How does an Earthworm eat?
Common earthworm |
Earthworms need a gizzard because they do not have any teeth. The nutrients are then absorbed into the body by way of the small intestine.
They can consume a great deal of matter in a relatively short period of time. In fact, they can produce their own weight in worm casts every 24 hours!
For related articles click onto the following links:
DO WORMS HAVE EYES?
WHAT DO WORMS EAT?