Publications

Publications Found: 1437

Remote Sensing Of Seasonal Light Use Efficiency In Temperate Bog Ecosystems
Tortini, R., Coops, N. C., Nesic, Z., Christen, A., Lee, S. C., Hilker, T.


Journal: Scientific Reports, Volume 7 (1): (2017). DOI: https://doi.org/10.1038/s41598-017-08102-x Sites: CA-DBB

Trapped Greenhouse Gases In The Permafrost Active Layer: Preliminary Results For Methane Peaks In Vertical Profiles Of Frozen Alaskan Soil Cores
Byun, E., Yang, J., Kim, Y., Ahn, J.

Copyright © 2016 John Wiley & Sons, Ltd.Degradation of organic carbon stored in permafrost may represent an additional source of atmospheric greenhouse gases (GHGs) in a warming climate. However, there is no clear understanding of how seasonal freeze–thaw affects gas permeability and emission of methane in permafrost soils, …


Journal: Permafrost And Periglacial Processes, Volume 28 (2): 477-484 (2017). DOI: 10.1002/ppp.1935 Sites: US-Prr

Revisiting the partitioning of net ecosystem exchange of CO2 into photosynthesis and respiration with simultaneous flux measurements of 13CO2 and CO2, soil respiration and a biophysical model, CANVEG.
Oikawa, P. Y., C. Sturtevant, S. H. Knox, J. Verfaillie, Y. W. Huang, and D. D. Baldocchi.

The partitioning of net ecosystem exchange of CO(NEE) into photosynthesis and respiration can be challenging and is often associated with assumptions that yield unknown amounts of uncertainty, thereby hindering model development. This occurs because we are inferring two pieces of information from one equation and measurement, …


Journal: Agricultural and Forest Meteorology, Volume 234: 149-163 (2017). DOI: 10.1016/j.agrformet.2016.12.016 Sites: US-Tw3

Long-Term Release Of Carbon Dioxide From Arctic Tundra Ecosystems In Alaska
Euskirchen, E. S., Bret-Harte, M. S., Shaver, G. R., Edgar, C. W., Romanovsky, V. E.

Releases of the greenhouse gases carbon dioxide (CO2) and methane (CH4) from thawing permafrost are expected to be among the largest feedbacks to climate from arctic ecosystems. However, the current net carbon (C) balance of terrestrial arctic ecosystems is unknown. Recent studies suggest that these ecosystems are sources, sinks, …


Journal: Ecosystems, Volume 20 (5): 960-974 (2017). DOI: http://dx.doi.org/10.1007/s10021-016-0085-9 Sites: US-ICh, US-ICs, US-ICt

Contrasting strategies of hydraulic control in two co-dominant temperate tree species
Matheny AM, Fiorella RP, Bohrer G, Poulsen CJ, Morin TH, Wunderlich A, Vogel CS, Curtis PS.

Biophysical controls on plant water status exist at the leaf, stem, and root levels. Therefore, we
pose that hydraulic strategy is a combination of traits governing water use at each of these three
levels. We studied sap flux, stem water storage, stomatal conductance, photosynthesis, and
growth of red oaks (Quercus rubra) and …


Journal: Ecohydrology, Volume 10 (3): 1815-1815 (2017). DOI: 10.1002/eco.1815/abstract Sites: US-UMB

Using Data From Landsat, Modis, Viirs And Phenocams To Monitor The Phenology Of California Oak/Grass Savanna And Open Grassland Across Spatial Scales
Liu, Y., Hill, M. J., Zhang, X., Wang, Z., Richardson, A. D., Hufkens, K., Filippa, G., Baldocchi, D. D., Ma, S., Verfaillie, J., Schaaf, C. B.

tThe Mediterranean-type oak/grass savanna of California is composed of widely spaced oak trees withunderstory grasses. These savanna regions are interspersed with large areas of more open grasslands.The ability of remotely sensed data (with various spatial resolutions) to monitor the phenology in thesewater-limited oak/grass savannas …


Journal: Agricultural And Forest Meteorology, Volume 237-238: 311-325 (2017). DOI: 10.1016/j.agrformet.2017.02.026 Sites: US-Ton, US-Var

Using digital camera and Landsat imagery with eddy covariance data to model gross primary production in restored wetlands
Knox, Sara Helen Dronova, Iryna Sturtevant, Cove Oikawa, Patricia Y. Matthes, Jaclyn Hatala Verfaillie, Joseph Baldocchi, Dennis

Wetlands have the ability to accumulate large amounts of carbon (C), and therefore wetland restoration has been proposed as a means of sequestering atmospheric carbon dioxide (CO2) to help mitigate climate change. There is a growing interest in using the C services of wetlands to help reduce habitat loss and finance restoration projects. …


Journal: Agricultural and Forest Meteorology, Volume 237–238: 233-245 (2017). DOI: http://dx.doi.org/10.1016/j.agrformet.2017.02.020 Sites: US-Myb, US-Tw1

Methanogenesis In Oxygenated Soils Is A Substantial Fraction Of Wetland Methane Emissions
Angle, J. C., Morin, T. H., Solden, L. M., Narrowe, A. B., Smith, G. J., Borton, M. A., Rey-Sanchez, C., Daly, R. A., Mirfenderesgi, G., Hoyt, D. W., Riley, W. J., Miller, C. S., Bohrer, G., Wrighton, K. C.

The current paradigm, widely incorporated in soil biogeochemical models, is that microbial methanogenesis can only occur in anoxic habitats. In contrast, here we show clear geochemical and biological evidence for methane production in well-oxygenated soils of a freshwater wetland. A comparison of oxic to anoxic soils reveal up to …


Journal: Nature Communications, Volume 8 (1): 1567 (2017). DOI: 10.1038/s41467-017-01753-4 Sites: US-OWC

Dynamics Of Canopy Stomatal Conductance, Transpiration, And Evaporation In A Temperate Deciduous Forest, Validated By Carbonyl Sulfide Uptake
Wehr, R., Commane, R., Munger, J. W., McManus, J. B., Nelson, D. D., Zahniser, M. S., Saleska, S. R., Wofsy, S. C.

Stomatal conductance influences both photosynthesis and transpiration, thereby coupling the carbon and water cycles and affecting surface-atmosphere energy exchange. The environmental response of stomatal conductance has been measured mainly on the leaf scale, and theoretical canopy models are relied on to upscale stomatal conductance …


Journal: Biogeosciences, Volume 14 (2): 389-401 (2017). DOI: 10.5194/bg-14-389-2017 Sites: US-Ha1

Climate Controls Over Ecosystem Metabolism: Insights From A Fifteen-Year Inductive Artificial Neural Network Synthesis For A Subalpine Forest
Albert, L. P., Keenan, T. F., Burns, S. P., Huxman, T. E., Monson, R. K.


Journal: Oecologia, Volume 184 (1): 25-41 (2017). DOI: 10.1007/s00442-017-3853-0 Sites: US-NR1