This article was featured in the 2022 Spring Newsletter by Sue Gwise-CCE Jefferson County. 

The invasive jumping worm (JW) has been confirmed in Jefferson County.  In November a suspicious worm sample that was brought into CCE Jefferson was sent to Colgate University for positive identification.  This destructive earthworm was first found in the SLELO PRISM region in St. Lawrence County in 2018. Jumping worms create an ecological disaster by rapidly consuming all the organic matter in the soil.  This leaves behind a soil that looks like coffee grounds, is devoid of nutrients, and is highly susceptible to erosion.  Worst of all there is no control.

 Wormy Background:

All the worms that inhabit the soils in the northern portions of North America are NOT native.  Any ‘native’ worms were scoured away by glaciers.  Upon colonization, worms were introduced from Europe.  They were brought over in plants, or in soil that was used as ship ballast.  Even though these foreign worms were not native, they are beneficial and well-behaved.  They aerate and break up the soil, stimulate microbial activity, and break down plant residue.  All this happens in a balanced manner and nutrients are cycled slowly throughout the ecosystem. The term ‘jumping worm’ collectively refers to several species of worms introduced from the Orient.   In comparison to European worms, JW behaves very differently.  They live at much higher densities than European worms and have a high reproductive rate.  They can reproduce via parthenogenesis, a process by which a female can produce female offspring without a male.  That means that if just one worm is introduced to a site it can give rise to an entire population. These voracious worms consume the organic matter in soils much quicker than European worms.  This interferes with nutrient cycling and eventually leads to less regeneration in forests and a decrease in biodiversity across all trophic levels.  The degraded soil is not habitable for most plants.  Jumping worms are also toxic to birds, amphibians, and other worms.   Although some animals such as raccoons, chipmunks, squirrels, opossum, and moles will consume JW.

Identification:

Also known as ‘crazy snake worms’ or ‘Alabama jumpers’ the worms will thrash about wildly when disturbed.  They can also detach their tails when handled.  They range from 1.5 to 8 inches in length.   Jumping worms have a smooth, white-colored clitellum (the narrow collar found around the body of most earthworms) as opposed to European worms which have a raised pink-red clitellum.   All other characteristics are subjective, making identification difficult.