Search Results - "Parmelee, Robert W."

Earthworms Increase Nitrogen Leaching to Greater Soil Depths in Row Crop Agroecosystems by Domínguez, Jorge, Bohlen, Patrick J., Parmelee, Robert W.

“…Many biological functions of soil organisms are replaced in intensive agricultural systems, but earthworms and other soil invertebrates may continue to have…”
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Microbial and Faunal Interactions and Effects on Litter Nitrogen and Decomposition in Agroecosystems by Beare, Michael H., Parmelee, Robert W., Hendrix, Paul F., Cheng, Weixin, Coleman, David C., Crossley, D. A.

“…We conducted field experiments to test the general hypothesis that the composition of decomposer communities and their trophic interactions can influence…”
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Interactions between Eisenia andrei (Oligochaeta) and nematode populations during vermicomposting by Domínguez, Jorge, Parmelee, Robert W., Edwards, Clive A.

“…We studied the effect of the earthworm, Eisenia andrei, on the nematode community and on the microbial activity during the vermicomposting of two organic…”
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Earthworm abundance and nitrogen mineralization rates along an urban-rural land use gradient by Steinberg, David A., Pouyat, Richard V., Parmelee, Robert W., Groffman, Peter M.

“…Preliminary observations of glaciated regions in North America suggest that forest stands associated with urban areas may support high populations of…”
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Movement of N from decomposing earthworm tissue to soil, microbial and plant N pools by Whalen, Joann K., Parmelee, Robert W., McCartney, David A., Vanarsdale, Jessica L.

“…A microcosm experiment was made to determine the fate of nitrogen released from 15N-labelled decomposing earthworms ( Lumbricus terrestris) in soil in the…”
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Earthworm Secondary Production and N Flux in Agroecosystems: A Comparison of Two Approaches by Joann K. Whalen, Parmelee, Robert W.

“…Production was estimated for Aporrectodea spp. and Lumbricus spp. populations in corn agroecosystems with a 5-year history of manure or inorganic fertilizer…”
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Quantification of nitrogen assimilation efficiencies and their use to estimate organic matter consumption by the earthworms Aporrectodea tuberculata (Eisen) and Lumbricus terrestris L by Whalen, Joann K, Parmelee, Robert W

“…Earthworms affect nitrogen cycling directly through the consumption and assimilation of organic N and the turnover of N through excretion and mortality…”
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Live and dead roots in forest soil horizons: contrasting effects on nitrogen dynamics by Ehrenfeld, J.G. (Rutgers University, New Brunswick, NJ.), Parsons, W.F.J, Han, X, Parmelee, R.W, Zhu, W

“…Roots are widely acknowledged to be major contributors to ecosystem nutrient cycles. However, live roots may have very different effects than dead roots, the…”
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Differential effects of earthworms on nitrogen cycling from various nitrogen-15-labeled substrates by Bohlen, P.J, Parmelee, R.W, Allen, M.F, Ketterings, Q.M

“…Earthworms incorporate organic matter into soil but their influence on cycling of N from incorporated materials is not well understood. This study examined the…”
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Detritus food webs in conventional and no-tillage agroecosystems by Hendrix, Paul F., Parmelee, Robert W., Crossley, D. A., Coleman, David C., Odum, Eugene P., Groffman, Peter M.

“…One of the more interesting ecological aspects of conservation tillage is the change it brings about in the physical, biological, and chemical characteristics…”
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Determining the effects of pollutants on soil faunal communities and trophic structure using a refined microcosm system by Parmelee, Robert W., Phillips, Carlton T., Checkai, Ronald T., Bohlen, Patrick J.

“…We used a refined microcosm technique to investigate the toxicity of copper, cadmium, malathion, and the polychlorinated biphenyl, Aroclor 1254, to trophic…”
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Effects of pine roots on microorganisms, fauna, and nitrogen availability in two soil horizons of a coniferous forest spodosol by Parmelee, R.W, Ehrenfeld, J.G, Tate, R.L. III

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Decay rates, nitrogen fluxes, and decomposer communities of single- and mixed-species foliar litter by Blair, J.M. (Ohio State University, Columbus, OH), Parmelee, R.W, Beare, M.H

“…It is suggested that the deviation of observed N fluxes in mixed-species litterbags from those predicted using single-species litterbags are the result of…”
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Earthworm effects on carbon and nitrogen dynamics of surface litter in corn agroecosystems by Bohlen, Patrick J., Parmelee, Robert W., McCartney, David A., Edwards, Clive A.

“…We examined the influence of earthworms on surface litter decomposition in corn (Zea mays) agroecosystems in Wooster, Ohio. We employed a split-plot…”
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Quantification of nitrogen excretion rates for three lumbricid earthworms using 15N by WHALEN, Joann K, PARMELEE, Robert W, SUBLER, Scott

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Water stability of earthworm casts in manure- and inorganic-fertilizer amended agroecosystems influenced by age and depth by Feng, Ge, Shuster, William D., Edwards, Clive A., Parmelee, Robert W., Subler, Scott

“…Earthworm casts can contribute significantly to surface soil structure in agroecosystems. We suggest that the water stability of such earthworm casts depends…”
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Live and Dead Roots in Forest Soil Horizons: Contrasting Effects on Nitrogen Dynamics by Ehrenfeld, Joan G., Parsons, William F. J., Han, Xingguo, Parmelee, Robert W., Zhu, Weixing

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Decay Rates, Nitrogen Fluxes, and Decomposer Communiies of Single‐ and Mixed‐Species Foliar Litter by Blair, John M., Parmelee, Robert W., Beare, Michael H.

“…Decomposition rates, N fluxes, and abundances of decomposer organisms were quantified in mixed—species litterbags (containing leaves of two or three of the…”
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Nematode trophic structure in conventional and no-tillage agroecosystems by Parmelee, R W, Alston, D G

“…The effect of tillage intensity on nematode community trophic structure and the role of nematodes in the regulation of decomposition rates in agroecosystems…”
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effects of live and dead roots on soil fungi in spodosolic soils of the New Jersey Pinelands by Zhu, W, Ehrenfeld, J.G, Parmelee, R.W, Parsons, W.F.J, Han, X

“…The effects of live and dead roots on soil fungi were investigated experimentally in a spodosolic soil of the New Jersey Pinelands. Field mesocosm plots were…”
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