|Earthworm presence (red points) and abscence (yellow points) at White Memorial Foundation from 2014 survey.|
Wednesday, February 18, 2015
Wednesday, January 28, 2015
|Vegetation and earthworm biomass scatterplot.|
I investigated the relationship between vegetation and introduced earthworms on the property. Several important relationships were observed. Herbaceous vegetation data was collected at 25 randomly selected points on the property within one square meter quadrats. Native vegetation including tree seedlings in the herbacous layer were negatively correlated with the amount of earthworms in the soil. Invasive plants were positively correlated with earthworm biomass. The relative strength of each of these relationships varied. Invasive plants and total native plants were the strongests correlations, while native tree seedlings were not as strong. Tree seedling cover can be influenced by several factors including herbivory, seed production, acid precipitation, as well as many other disturbances. Neverthess, this data suggests that introduced earthworms are one more important factor that influences our forest ecosystems.
Monday, January 12, 2015
|A total of 14 species of earthworms observed in 2014, |
of whcih two were native (N) and twelve were exotic (E),
on The White Memorial Foundation, Inc., and associated forest cover types.
Click on table to enlarge.