anecic

I'll leave the endogeic and anecic earthworms for a future column.

L. terrestris is an anecic worm.

Common earthworms such as Lumbricus terrestris are anecic(deep burrowing) species and hence unsuitable for use in a closed system.

Earthworms may be grouped, according to their behavioural ecology, into three main types: epigeic, endogeic, and anecic..

The greyish brown common earthworms are deep burrowing (anecic) and do not readily breed in the shallow worm farm bins.

She plans to display the common epigeic worms, known as red wigglers, and anecic worms, popularly called nightcrawlers.

It increases the number of "soil-eating" earthworms (endogea) but is detrimental to vertical-dwelling earthworms (anecic).

Anecic earthworms make permanent vertical burrows in soil, feeding on leaves on the soil surface that they drag into their burrows.

Anecic species such as the dew-worm make deep, vertical tunnels in the soil, while endogeic species like the Canadian worm burrow continuously, creating a network of vertical and horizontal channels.

Example research projects are to examine the biogeochemistry and microbial ecology of septic drain field soils used to treat domestic wastewater, the role of anecic earthworms in controlling the movement of water and nitrogen cycle in agricultural soils, and the assessment of soil quality in turf production.