Search Results - "Megonigal, J P"

The impact of sea-level rise on organic matter decay rates in Chesapeake Bay brackish tidal marshes by Kirwan, M. L, Langley, J. A, Guntenspergen, G. R, Megonigal, J. P

“…The balance between organic matter production and decay determines how fast coastal wetlands accumulate soil organic matter. Despite the importance of soil…”
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Attaining freshwater and estuarine-water soil saturation in an ecosystem-scale coastal flooding experiment by Hopple, A. M., Doro, K. O., Bailey, V. L., Bond-Lamberty, B., McDowell, N., Morris, K. A., Myers-Pigg, A., Pennington, S. C., Regier, P., Rich, R., Sengupta, A., Smith, R., Stegen, J., Ward, N. D., Woodard, S. C., Megonigal, J. P.

“…Coastal upland forests are facing widespread mortality as sea-level rise accelerates and precipitation and storm regimes change. The loss of coastal forests…”
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Methane emissions from upland forest soils and vegetation by Megonigal, J.P, Guenther, A.B

“…Most work on methane (CH4) emissions from natural ecosystems has focused on wetlands because they are hotspots of CH4 production. Less attention has been…”
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Researchers barking up (the right) tree find new mechanisms controlling methane transport by woody vegetation by Ward, N D, Megonigal, J P

“…This article is a Commentary on Jeffrey et al . (2024), 242 : 49–60 …”
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Sensitivity of Mean Canopy Stomatal Conductance to Vapor Pressure Deficit in a Flooded Taxodium distichum L. Forest: Hydraulic and Non-Hydraulic Effects by Oren, R., Sperry, J. S., B. E. Ewers, D. E. Pataki, Phillips, N., J. P. Megonigal

“…We measured the xylem sap flux in 64-year-old Taxodium distichum (L.) Richard trees growing in a flooded forest using Granier-type sensors to estimate mean…”
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Rising plant demand strengthens nitrogen limitation in tidal marsh by Langley, J. A., Wang, L., Yedman, B., Megonigal, J. P.

“…Nitrogen (N) is a limiting nutrient for primary productivity in most terrestrial ecosystems, but whether N limitation is strengthening or weakening remains…”
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Sap-flux-scaled transpiration responses to light, vapor pressure deficit, and leaf area reduction in a flooded Taxodium distichum forest by Oren, R, Phillips, N, Ewers, B.E, Pataki, D.E, Megonigal, J.P

“…We used 20-mm-long, Granier-type sensors to quantify the effects of tree size, azimuth and radial position in the xylem on the spatial variability in xylem sap…”
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Rapid plant trait evolution can alter coastal wetland resilience to sea level rise by Vahsen, M L, Blum, M J, Megonigal, J P, Emrich, S J, Holmquist, J R, Stiller, B, Todd-Brown, K E O, McLachlan, J S

“…Rapid evolution remains a largely unrecognized factor in models that forecast the fate of ecosystems under scenarios of global change. In this work, we…”
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Control of sediment deposition rates in two mid-Atlantic Coast tidal freshwater wetlands by Darke, A.K., Megonigal, J.P.

“…Eustatic sea level rise and rapidly increasing coastal development threaten tidal freshwater wetlands. Sediment deposition is one process that affects their…”
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Iron-Oxidizing Bacteria Are Associated with Ferric Hydroxide Precipitates (Fe-Plaque) on the Roots of Wetland Plants by EMERSON, D, WEISS, J. V, MEGONIGAL, J. P

“…Classifications Services AEM Citing Articles Google Scholar PubMed Related Content Social Bookmarking CiteULike Delicious Digg Facebook Google+ Mendeley Reddit…”
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Aboveground production in southeastern floodplain forests: a test of subsidy-stress hypothesis by Megonigal, J. Patrick, Conner, William H., Kroeger, Steven, Sharitz, Rebecca R.

“…It has been hypothesized that periodically flooded forests have higher rates of aboveground net primary production than upland forests and near-continuously…”
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Developing a Redox Network for Coastal Saltmarsh Systems in the PFLOTRAN Reaction Model by O’Meara, T. A., Yuan, F., Sulman, B. N., Noyce, G. L., Rich, R., Thornton, P. E., Megonigal, J. P.

“…Coastal ecosystems have been largely ignored in Earth system models but are important zones for carbon and nutrient processing. Interactions between water,…”
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plant-soil-atmosphere microcosm for tracing radiocarbon from photosynthesis through methanogenesis by Megonigal, J.P, Whalen, S.C, Tissue, D.T, Bovard, B.D, Albert, D.B, Allen, A.S

“…We designed a CO(2)-controlled cuvette and stripping system to trace a (14)CO(2) pulse-label from photosynthetic assimilation by wetland plants (in this study…”
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Root and Microbial Soil CO2 and CH4 Fluxes Respond Differently to Seasonal and Episodic Environmental Changes in a Temperate Forest by Hopple, A. M., Pennington, S. C., Megonigal, J. P., Bailey, V., Bond‐Lamberty, B.

“…Upland forest soils are typically major atmospheric carbon dioxide (CO2) sources and methane (CH4) sinks, but the contributions of root and microbial…”
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C3 and C4 Biomass Allocation Responses to Elevated CO2 and Nitrogen: Contrasting Resource Capture Strategies by White, K. P., Langley, J. A., Cahoon, D. R., Megonigal, J. P.

“…Plants alter biomass allocation to optimize resource capture. Plant strategy for resource capture may have important implications in intertidal marshes, where…”
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Twelve testable hypotheses on the geobiology of weathering by BRANTLEY, S.L, MEGONIGAL, J.P, SCATENA, F.N, BALOGH-BRUNSTAD, Z, BARNES, R.T, BRUNS, M.A, VAN CAPPELLEN, P, DONTSOVA, K, HARTNETT, H.E, HARTSHORN, A.S, HEIMSATH, A, HERNDON, E, JIN, L, KELLER, C.K, LEAKE, J.R, MCDOWELL, W.H, MEINZER, F.C, MOZDZER, T.J, PETSCH, S, PETT-RIDGE, J, PREGITZER, K.S, RAYMOND, P.A, RIEBE, C.S, SHUMAKER, K, SUTTON-GRIER, A, WALTER, R, YOO, K

“…Critical Zone (CZ) research investigates the chemical, physical, and biological processes that modulate the Earth's surface. Here, we advance 12 hypotheses…”
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Effects of flooding on root and shoot production of bald cypress in large experimental enclosures by Megonigal, J. Patrick, Day, Frank P.

“…Effects of hydroperiod on the root production of bald cypress (Taxodium distichum) saplings were determined in large (8.0 m^2 x 1.5 m deep) watertight…”
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The microbial activity season in southeastern hydric soils by Megonigal, J.P. (Duke Univ., Durham, NC.), Faulkner, S.P, Patrick, W.H

“…The growing season requirement is an often overlooked part of the definition for hydric soils. The current technical definition for a hydric soil states that…”
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Productivity responses of Acer rubrum and Taxodium distichum seedlings to elevated CO2 and flooding by Vann, C D, Megonigal, J P

“…Elevated levels of atmospheric CO2 are expected to increase photosynthetic rates of C3 tree species, but it is uncertain whether this will result in an…”
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Geochemical control of microbial Fe(III) reduction potential in wetlands: comparison of the rhizosphere to non-rhizosphere soil by Weiss, Johanna V., Emerson, David, Megonigal, J.Patrick

“…We compared the reactivity and microbial reduction potential of Fe(III) minerals in the rhizosphere and non-rhizosphere soil to test the hypothesis that rapid…”
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