Carbon (C) uptake rates in many forests are sustained, or decline only briefly, following disturbances that partially defoliate the canopy. The mechanisms supporting such functional resistance to moderate …
Journal: Ecological Applications, Volume 23 (5): 1202-1215 (2013). DOI: 10.1890/12-1554.1 Sites: US-UMB, US-UMd
Environmental and management factors are critical in determining the C source or sink status of agroecosystems. Information on the C dynamics of an ecosystem from source to sink and vice versa are critical in determining the role of that ecosystem in regional and global C balances. We investigated the impact of the 2011 mega-drought …
Journal: Agronomy Journal, Volume 105 (6): 1749-1760 (2013). DOI: 10.2134/agronj2013.0112 Sites: US-LGr
- Many regions of the globe are experiencing a simultaneous change in the dominant plant functional type and regional climatology. We explored how atmospheric temperature and precipitation control leaf- and ecosystem-scale carbon fluxes within a pair of semi-arid …
Journal: Journal Of Ecology, Volume 101 (6): 1471-1483 (2013). DOI: 10.1111/1365-2745.12161 Sites: US-SRM
Despite their prevalence, little attention has been given to quantifying arid land soil and ecosystem carbon fluxes over prolonged, annually occurring dry periods. We measured soil [CO2] profiles and fluxes (Fs) along with volumetric soil moisture and temperature in bare interplant canopy soils and …
Journal: Journal Of Geophysical Research: Biogeosciences, Volume 118 (4): 1593-1603 (2013). DOI: 10.1002/2013JG002495 Sites: US-Whs
Ecosystem respiration (Reco) is one of the largest terrestrial carbon (C) fluxes. The effect of climate change on Reco depends on the …
Journal: Global Change Biology, Volume 19 (2): 649-661 (2013). DOI: 10.1111/gcb.12058 Sites: US-EML
Peatlands and forested wetlands can cover a large fraction of the land area and contain a majority of the regional carbon pool in wet northern temperate landscapes. We used the LANDIS-II forest landscape succession model coupled with a model of plant community …
Journal: Ecosystems, Volume 16 (3): 491-507 (2013). DOI: 10.1007/s10021-012-9624-1 Sites: US-Los
Climate-induced changes to permafrost are altering high latitude landscapes in ways that could increase the vulnerability of the vast soil carbon pools of the region. Permafrost thaw is temporally dynamic and spatially heterogeneous because, in addition to the thickening of the active …
Journal: Environmental Research Letters, Volume 8 (3): n/a-n/a (2013). DOI: 10.1088/1748-9326/8/3/035016 Sites: US-EML
Permafrost thaw can affect decomposition rates by changing environmental conditions and litter quality. As permafrost thaws, soils warm and thermokarst (ground subsidence) features form, causing some areas to become wetter while other areas become drier. We used a common substrate to measure how permafrost thaw affects decomposition …
Journal: Journal Of Geophysical Research: Biogeosciences, Volume 118 (3): 1133-1143 (2013). DOI: 10.1002/jgrg.20089 Sites: US-EML
The binary nature of Northern California’s ecohydrology, in which water is either abundantly available or scarce, should be reflected in the root architecture of the native blue oak. Our objective was to quantify carbon storage and understand how the form of the root system facilitates ecosystem functioning despite the asynchrony …
Journal: Journal Of Geophysical Research: Biogeosciences, Volume 118 (1): 135-147 (2013). DOI: 10.1029/2012jg002160 Sites: US-Ton
The energy balance at most surface-atmosphere flux research sites remains unclosed. The mechanisms underlying the discrepancy between measured energy inputs and outputs across the global FLUXNET tower network are still under debate. Recent reviews have identified …
Journal: Agricultural And Forest Meteorology, Volume 171-172: 137-152 (2013). DOI: 10.1016/j.agrformet.2012.11.004 Sites: BR-Ma2