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
Soil carbon dioxide efflux (soil respiration, SR) was measured with eight autochambers at two locations along a wetland to upland slope at Harvard Forest over a 4 year period, 2003–2007. SR was consistently higher in the upland plots than at the wetland margin during the late summer/early fall. Seasonal and diel hystereses with …
Journal: Journal Of Geophysical Research: Biogeosciences, Volume 115 (G2): n/a-n/a (2010), ISBN . DOI: 10.1029/2008jg000858 Sites: US-Ha1
Annual net ecosystem production (NEP) was estimated at three boreal forest sites where open-path infrared gas analysers were used in eddy covariance systems. The analysers showed apparent ecosystem uptake of carbon dioxide during frozen conditions where small net respiration …
Journal: Agricultural And Forest Meteorology, Volume 150 (10): 1366-1372 (2010), ISBN . DOI: 10.1016/j.agrformet.2010.06.007 Sites: CA-SF1, CA-SF2, CA-SF3
The higher-order scalar concentration fluctuation properties are examined in the context of Monin–Obukhov similarity theory for a variety of greenhouse gases that have distinct and separate source/sink locations along an otherwise ideal micrometeorological …
Journal: Boundary-Layer Meteorology, Volume 136 (3): 407-430 (2010), ISBN . DOI: 10.1007/s10546-010-9514-z Sites: US-Snd
• Understanding controls over plant–atmosphere CO 2 exchange is important for
quantifying carbon budgets across a range of spatial and temporal scales. In this
study, we used a simple approach to estimate whole-tree CO 2 assimilation rate
(A Tree ) in a subalpine forest ecosystem.
• We analysed the carbon isotope ratio …
Journal: New Phytologist, Volume 185 (4): 1000-1015 (2010), ISBN . DOI: 10.1111/j.1469-8137.2009.03154.x Sites: US-NR1
This study evaluates age-related patterns of ecosystem carbon (C) fluxes in a chronosequence (5-, 18-, 33-, and 68-year old in 2007) of planted pine (Pinus strobus L.) forests in southern Ontario, Canada, from 2003 to 2007. Carbon fluxes determined with the eddy covariance technique were normalized by differences in site …
Journal: Agricultural And Forest Meteorology, Volume 150 (7-8): 1090-1101 (2010), ISBN . DOI: 10.1016/j.agrformet.2010.04.008 Sites: CA-TP1, CA-TP2, CA-TP3, CA-TP4
As climate change accelerates, it is important to know the likely impact of climate change on the carbon cycle (see the Perspective by Reich). Gross primary production (GPP) …
Journal: Science, Volume 329 (5993): 838-840 (2010), ISBN . DOI: 10.1126/science.1189587 Sites: BR-Ma2
We investigated soil carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) exchanges in an age-sequence (4, 17, 32, 67 years old) of …
Journal: Global Change Biology, Volume 16 (8): 2198-2212 (2010), ISBN . DOI: 10.1111/j.1365-2486.2009.02066.x Sites: CA-TP1, CA-TP2, CA-TP3, CA-TP4
Observations of the temporal and spatial distribution of poststorm soil moisture in open shrublands and savannas are limited, yet they are critical to understanding the interaction and feedback between moisture distribution and canopies. The objective of this analysis was to study the hydrologic impacts of precipitation pulses on …
Journal: Water Resources Research, Volume 46 (W10509): n/a-n/a (2010), ISBN . DOI: 10.1029/2009WR008842 Sites: US-Whs
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), ISBN . DOI: 10.1111/j.1365-2486.2009.01991.x Sites: BR-Ma2