We present four years (2005–2008) of biometric (B) and eddy-covariance (EC) measurements of carbon (C) fluxes to constrain estimates of gross primary production (GPP), net primary production (NPP), ecosystem respiration (RE) and net ecosystem production (NEP) in an age-sequence (6-, 19-, 34-, and 69-years-old in 2008) of pine forests …
Journal: Agricultural And Forest Meteorology, Volume 150 (7-8): 952-965 (2010). DOI: 10.1016/j.agrformet.2010.03.002 Sites: CA-TP1, CA-TP2, CA-TP3, CA-TP4
The intensification of the hydrological cycle, with an observed and modeled increase in drought incidence and severity, underscores the need to quantify drought effects on …
Journal: Global Change Biology, Volume 16 (2): 657-670 (2010). DOI: 10.1111/j.1365-2486.2009.01991.x Sites: BR-Ma2
It is well known that microbial-mediated soil respiration, the major source of CO2 from terrestrial ecosystems, is sensitive to temperature. Here, we hypothesize that some mechanisms, such as acclimation of microbial respiration to temperature and/or regulation by plant fresh C inputs of the temperature sensitivity of …
Journal: Biogeochemistry, Volume 98 (1-3): 127-138 (2010). DOI: 10.1007/s10533-009-9381-1 Sites: US-Ton
Invasive insects can impact ecosystem functioning by altering carbon, nutrient, and hydrologic cycles. In this study, we used eddy covariance to measure net CO2 exchange with the atmosphere (NEE), and biometric measurements to characterize net ecosystem productivity (NEP) in oak- and pine-dominated forests that were defoliated …
Journal: Global Change Biology, Volume 16 (1): 88-101 (2010). DOI: 10.1111/j.1365-2486.2009.01983.x Sites: US-Ced, US-Slt
We report on net ecosystem production (NEP) and key environmental controls on net ecosystem exchange (NEE) of carbon dioxide (CO2) between a mangrove forest and the atmosphere in the coastal Florida Everglades. An eddy covariance system deployed above the canopy was used to determine NEE during January 2004 through August …
Journal: Journal Of Geophysical Research: Biogeosciences, Volume 115 (G2): n/a-n/a (2010). DOI: 10.1029/2009JG001186 Sites: US-Skr
Disturbances alter ecosystem carbon dynamics, often by reducing carbon uptake and stocks. We compared the impact of two types of disturbances that represent the most likely future conditions of currently …
Journal: Ecological Applications, Volume 20 (3): 663-683 (2010). DOI: 10.1890/09-0934.1 Sites: US-Fmf, US-Fuf, US-Fwf
Permafrost soils store nearly half of global soil carbon (C), and therefore permafrost thawing could lead to large amounts of greenhouse gas emissions via decomposition of soil organic matter. When ice-rich permafrost thaws, it creates a localized surface subsidence called thermokarst terrain, which changes the soil microenvironment. …
Journal: Journal Of Geophysical Research: Biogeosciences, Volume 115 (G1): n/a-n/a (2010). DOI: 10.1029/2008jg000906 Sites: US-EML
There are a number of methods that can be used to help assess carbon budgets at the site to continental scales. Eddy covariance (EC) networks have been developed over the last decade and have been used to make many advances in our understanding. However, eddy covariance …
Journal: Agriculture, Ecosystems & Environment, Volume 139 (3): 302-315 (2010). DOI: 10.1016/j.agee.2010.04.004 Sites: BR-Ma2
- Hydraulic redistribution (HR) of water via roots from moist to drier portions of the soil occurs in many ecosystems, potentially influencing both water use and carbon assimilation.
- By measuring soil water content, sap flow and eddy covariance, we investigated the temporal variability of …
Journal: New Phytologist, Volume 187 (1): 171-183 (2010). DOI: 10.1111/j.1469-8137.2010.03245.x Sites: US-NC1, US-NC2
Wetland restoration can mitigate aerobic decomposition of subsided organic soils, as well as re-establish conditions favorable for carbon storage. Rates of carbon storage result from the balance of inputs and losses, both of which are affected by wetland …
Journal: Wetlands Ecology And Management, Volume 18 (1): 1-16 (2010). DOI: 10.1007/s11273-009-9143-9 Sites: US-Tw1