Search Results - "Hart, S. C"

Dust outpaces bedrock in nutrient supply to montane forest ecosystems by Aciego, S. M., Riebe, C. S., Hart, S. C., Blakowski, M. A., Carey, C. J., Aarons, S. M., Dove, N. C., Botthoff, J. K., Sims, K. W. W., Aronson, E. L.

“…Dust provides ecosystem-sustaining nutrients to landscapes underlain by intensively weathered soils. Here we show that dust may also be crucial in montane…”
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Carbon and water fluxes from ponderosa pine forests disturbed by wildfire and thinning by Dore, S, Kolb, T. E, Montes-Helu, M, Eckert, S. E, Sullivan, B. W, Hungate, B. A, Kaye, J. P, Hart, S. C, Koch, G. W, Finkral, A

“…Disturbances alter ecosystem carbon dynamics, often by reducing carbon uptake and stocks. We compared the impact of two types of disturbances that represent…”
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Soil carbon and nitrogen erosion in forested catchments: implications for erosion-induced terrestrial carbon sequestration by Stacy, E. M, Hart, S. C, Hunsaker, C. T, Johnson, D. W, Berhe, A. A

“…Lateral movement of organic matter (OM) due to erosion is now considered an important flux term in terrestrial carbon (C) and nitrogen (N) budgets, yet most…”
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Long-term impact of a stand-replacing fire on ecosystem CO2 exchange of a ponderosa pine forest by DORE, S., KOLB, T. E., MONTES-HELU, M., SULLIVAN, B. W., WINSLOW, W. D., HART, S. C., KAYE, J. P., KOCH, G. W., HUNGATE, B. A.

“…Ponderosa pine (Pinus ponderosa) forests of the southwestern United States are a mosaic of stands where undisturbed forests are carbon sinks, and stands…”
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Cross-biome transplants of plant litter show decomposition models extend to a broader climatic range but lose predictability at the decadal time scale by CURRIE, W.S, HARMON, M.E, BURKE, I.C, HART, S.C, PARTON, W.J, SILVER, W

“…We analyzed results from 10-year long field incubations of foliar and fine root litter from the Long-term Intersite Decomposition Experiment Team (LIDET)…”
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Thinning reduces soil carbon dioxide but not methane flux from southwestern USA ponderosa pine forests by Sullivan, B.W., Kolb, T.E., Hart, S.C., Kaye, J.P., Dore, S., Montes-Helu, M.

“…Forest soils are important components of the global carbon cycle because they both store and release carbon. Carbon dioxide is released from soil to the…”
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Responses of riparian trees to interannual variation in ground water depth in a semi‐arid river basin by Horton, J. L., Kolb, T. E., Hart, S. C.

“…ABSTRACT We investigated the physiological and growth responses of native (Populus fremontii S. Wats. and Salix gooddingii Ball) and exotic (Tamarix chinensis…”
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Persistent effects of fire-induced vegetation change on energy partitioning and evapotranspiration in ponderosa pine forests by Montes-Helu, M.C., Kolb, T., Dore, S., Sullivan, B., Hart, S.C., Koch, G., Hungate, B.A.

“…We compared energy fluxes between a site converted from ponderosa pine ( Pinus ponderosa) forest to sparse grassland by a severe wildfire 10 years ago and a…”
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Competition for nitrogen between plants and soil microorganisms by Kaye, Jason P., Hart, Stephen C.

“…Experiments suggest that plants and soil microorganisms are both limited by inorganic nitrogen, even on relatively fertile sites. Consequently, plants and soil…”
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High rates of nitrification and nitrate turnover in undisturbed coniferous forests by Stark, John M, Hart, Stephen C

“…A 15N isotope-dilution technique was used in intact soil cores to measure gross rates of nitrification and microbial assimilation of NOnegative 3 in 11…”
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Do high-tannin leaves require more roots by Fischer, D.G, Hart, S.C, Rehill, B.J, Lindroth, R.L, Keim, P, Whitham, T.G

“…The well-known deceleration of nitrogen (N) cycling in the soil resulting from addition of large amounts of foliar condensed tannins may require increased…”
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Physiological Response to Groundwater Depth Varies among Species and with River Flow Regulation by Horton, Jonathan L., Kolb, Thomas E., Hart, Stephen C.

“…We investigated the physiological response of two native riparian tree species (Populus fremontii and Salix gooddingii) and one exotic species (Tamarix…”
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Insect infestations linked to shifts in microclimate: important climate change implications. [Erratum: 2006 Jan-Feb, v. 70, no. 1, p. 305.] by Classen, A.T, Hart, S.C, Whitham, T.G, Cobb, N.S, Koch, G.W

“…Changes in vegetation due to drought-influenced herbivory may influence microclimate in ecosystems. In combination with studies of insect resistant and…”
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Hydraulic lift: a potentially important ecosystem process by Horton, Jonathan L, Hart, Stephen C

“…Hydraulic lift is the process by which some deep-rooted plants take in water from lower soil layers and exude that water into upper, drier soil layers…”
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Dynamics of Gross Nitrogen Transformations in an Old-Growth Forest: The Carbon Connection by Hart, Stephen C., Nason, G. E., Myrold, David D., Perry, David A.

“…We conducted a 456-d laboratory incubation of an old-growth coniferous forest soil to aid in the elucidation of C controls on N cycling processes in forest…”
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Carbon and Nitrogen Elemental and Isotopic Patterns in Macrofungal Sporocarps and Trees in Semiarid Forests of the South-Western USA by Hart, S. C., Gehring, C. A., Selmants, P. C., Deckert, R. J.

“…1. Previous studies in humid forests shown that the13C and15N isotopic composition differs between ectomycorrhizal (ECM) and saprotrophic (SAP) fungi, and that…”
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Ecosystem Implications of Genetic Variation in Water-Use of a Dominant Riparian Tree by Fischer, D. G., Hart, S. C., Whitham, T. G., Martinsen, G. D., Keim, P.

“…Genetic variation in dominant species can affect plant and ecosystem functions in natural systems through multiple pathways. Our study focuses on how genetic…”
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Internal cycling of nitrate in soils of a mature coniferous forest by Davidson, Eric A., Hart, Stephen C., Firestone, Mary K.

“…Gross rates of N mineralization, immobilization, and nitrification were measured by ^1^5N isotope dilution in a 10-yr-old conifer plantation and in a mature…”
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Influence of red alder on soil nitrogen transformations in two conifer forests of contrasting productivity by Hart, Stephen C., Binkley, Dan, Perry, David A.

“…We conducted laboratory studies to determine the effects of red alder ( Alnus rubra Bong.) on soil N transformations and N availability indices at two conifer…”
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Nitrogen transformations in fallen tree boles and mineral soil of an old-growth forest by Hart, Stephen C.

“…I measured net N transformation rates of well-decayed boles and adjacent mineral soil under field conditions in an old-growth Douglas-fir/western…”
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