| http://www.w3.org/ns/prov#value | - plex ecosystems.The highest earthworm concentrations in the Mid-Atlantic region are in urban areas such as Philadelphia, according to Anne Bower, associate biology professor at Philadelphia University, who has studied invasive earthworms at the 340-acre Schuylkill Center for Environmental Education in upper Roxborough, Pa.Fall, before freezing temperatures become the norm, is a great time to see w
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