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Microbial and Microfaunal Community Dynamics in Artificial and Lumbricus terrestris (L.) Burrows

^a Lab. of Soil Ecology and Microbiology, 024 Coastal Institute in Kingston, Univ. of Rhode Island, Kingston, RI 02881
^b Dep. of Crop, Soil, and Environmental Sciences, 115 Plant Science Building, Univ. of Arkansas, Fayetteville, AR 72701

View larger version (24K): [in a new window]   Fig. 1. Active/total fungal biomass and active/total microbial biomass in artificial burrows not lined with corn leaf litter (ARTF); control soil (CTRL); artificial burrows lined with corn leaf litter (LEAF); and L. terrestris burrows (WORM) treatments as a function of incubation time. Bars represent one standard deviation (n = 3). Asterisks indicate dates that the active/total ratios are significantly higher in WORM soil than in any other treatment (* is for P < 0.05, ** is for P < 0.01). On Week 7, the active/total microbial biomass ratios for both LEAF and WORM soil were higher than for CTRL and ARTF.

View larger version (18K): [in a new window]   Fig. 2. Bacterivores, fungivores, Tylenchids, plant parasitic and omnivore/predaceous nematodes in artificial burrows lined with corn leaf litter (LEAF) and L. terrestris burrows (WORM) treatments as a function of incubation time. Bars represent one standard deviation (n = 2 or 3). Asterisks indicate dates that values are significantly higher in LEAF than in WORM soil (P < 0.05).

View larger version (19K): [in a new window]   Fig. 3. Log transformed abundance of total protozoa, flagellates, ciliates, and amoebae in artificial burrows lined with corn leaf litter (LEAF); and L. terrestris burrows (WORM) treatments as a function of incubation time. Bars represent one standard deviation (n = 3). Asterisks indicate dates that values in WORM soil are significantly higher than in LEAF soil (P < 0.05).