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), ISBN . 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), ISBN . 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), ISBN . 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), ISBN . 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), ISBN . 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), ISBN . 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), ISBN . DOI: 10.1007/s11273-009-9143-9 Sites: US-Tw1
The eddy covariance technique is a widely used and accepted method to quantify ecosystem-scale mass and energy fluxes. Eddy covariance measurements of evaporation, also known as evapotranspiration, are used to determine local, regional and global water budgets, calibrate …
Journal: Agricultural And Forest Meteorology, Volume 150 (2): 219-225 (2010), ISBN . DOI: 10.1016/j.agrformet.2009.11.002 Sites: US-SRM, US-Whs, US-Wkg
Carbon dioxide (CO2) emissions from soil, foliage, and live woody tissue were measured throughout the year in afforested, white pine (Pinus strobus L.) stands (67, 32, 17, and 4 years old as of 2006), growing in a northern temperate climate. The data were used to estimate annual ecosystem respiration (Re) …
Journal: Journal Of Geophysical Research, Volume 115 (G3): n/a-n/a (2010), ISBN . DOI: 10.1029/2009jg001089 Sites: CA-TP2
Disturbances are important for renewal of North American forests. Here we summarize more than 180 site years of eddy covariance measurements of carbon dioxide flux made at forest chronosequences in North America. The disturbances included stand-replacing fire (Alaska, Arizona, Manitoba, and Saskatchewan) and harvest (British Columbia, …
Journal: Journal Of Geophysical Research, Volume 115 (G00K02): n/a-n/a (2010), ISBN . DOI: 10.1029/2010JG001390 Sites: US-Fmf, US-Fuf, US-Fwf