Earthworm invasion in North America: A look at recent data Name Date Period from Bruce A. Snyder, Mac A. Callaham Jf. Christopher N. Lowe, Paul F. Hendrix, Earthworm invasion in Nerth America: Food resouree cempectition affects native millipede survival and invasive earthworm reproduction, Soil Biology and Biochemistry, Volume 57, February 2013, Pages 212- 216, 15SN 0038-0717, Abstract: The invasive non-native earthworm Amynthas agrestis, also known as the Alabama jumper, crazy worm, or snakeworm, (Goto and Hatai, 1899) has recently been documented invading forests of the Appalachian Mountains in the southeastern United States. This earthworm lives on the surface of the soil in leaf litter and decreases the depth of organic soil horizons. It is thought to play a role in the decrease of millipede richness and abundance associated with A . agrestis invasion. To investigate the mechanisms behind these effects, A. agrestis and the millipede Sigmoria ainsliei (Xystodesmidae), also known as the red- sided flat millipede, were placed into microcosms (small containers) with soil. The microcosms were given a soil treatment of either L horizon, F and H horizon, or a combination of L/H treatment. A L horizon treatment has an accumulation of organic matter derived mainly from litter residues. F and H horizon contains a mixture of organic matter in different stages of decomposition and humified material with little or no plant structure visible. The final treatment. L/FH treatment, had both composted and non-composted organic material. Microcosms were destructively sampled and reconstructed with the same treatments every four weeks to assess faunal fresh weight change and survival. Soils from earthworm treatments were wet-sieved for cocoons to assess treatment effects on reproduction. What is the study's hypothesis? Determine the experimental groups and sketch them as an image or organize them as a graphic organizer or chart in the space below. What methods were used to determine the results of this experiment?.

1. Earthworm invasion in North America: A look at recent data Name Date Period from Bruce A.
Snyder, Mac A. Callaham Jf. Christopher N. Lowe, Paul F. Hendrix, Earthworm invasion in
Nerth America: Food resouree cempectition affects native millipede survival and invasive
earthworm reproduction, Soil Biology and Biochemistry, Volume 57, February 2013, Pages 212-
216, 15SN 0038-0717, Abstract: The invasive non-native earthworm Amynthas agrestis, also
known as the Alabama jumper, crazy worm, or snakeworm, (Goto and Hatai, 1899) has recently
been documented invading forests of the Appalachian Mountains in the southeastern United
States. This earthworm lives on the surface of the soil in leaf litter and decreases the depth of
organic soil horizons. It is thought to play a role in the decrease of millipede richness and
abundance associated with A . agrestis invasion. To investigate the mechanisms behind these
effects, A. agrestis and the millipede Sigmoria ainsliei (Xystodesmidae), also known as the red-
sided flat millipede, were placed into microcosms (small containers) with soil. The microcosms
were given a soil treatment of either L horizon, F and H horizon, or a combination of L/H
treatment. A L horizon treatment has an accumulation of organic matter derived mainly from
litter residues. F and H horizon contains a mixture of organic matter in different stages of
decomposition and humified material with little or no plant structure visible. The final treatment.
L/FH treatment, had both composted and non-composted organic material. Microcosms were
destructively sampled and reconstructed with the same treatments every four weeks to assess
faunal fresh weight change and survival. Soils from earthworm treatments were wet-sieved for
cocoons to assess treatment effects on reproduction. What is the study's hypothesis? Determine
the experimental groups and sketch them as an image or organize them as a graphic organizer or
chart in the space below. What methods were used to determine the results of this experiment?