Respiratory carbon losses and the carbon‐use efficiency of a northern hardwood forest, 1999–2003

Curtis, Peter S.; Vogel, Christoph S.; Gough, Christopher M.; Schmid, Hans‐Peter; Su, Hong-Bing; Bovard, B. D.

doi:10.1111/j.1469-8137.2005.01438.x

Cited by 131 publications

(100 citation statements)

References 82 publications

(128 reference statements)

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“…This site supports a mixed forest, dominated by Populus grandidentata, P. tremuloides, Quercus rubra, Fagus grandifolia, Acer rubrum, and Pinus strobus (Curtis et al, 2005;Pressley et al, 2005Pressley et al, , 2006. Three years of eddy covariance measurements, from the growing seasons of 2000, 2001, and 2002, are available to test the model efficiency at capturing seasonal time-courses.…”

Section: Sitementioning

confidence: 99%

Process based inventory of isoprenoid emissions from European forests: model comparisons, current knowledge and uncertainties

et al. 2009

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Abstract. Large uncertainties exist in our knowledge of regional emissions of non-methane biogenic volatile organic compounds (BVOC). We address these uncertainties through a two-pronged approach by compiling a state of the art database of the emissions potentials for 80 European forest species, and by a model assessment and inter-comparison, both at the local and regional scale, under present and projected future climatic conditions. We coupled three contrasting isoprenoid models with the ecophysiological forest model GOTILWA+ to evaluate leaf and ecosystem isoprenoid emissions, build an emissions inventory for European forests, and to consider model behaviour in present climate and under projected future climate change conditions. Hourly, daily and annual isoprene emissions as simulated by the models were evaluated against flux measurements. The validation highlighted a general model capacity to capture gross fluxes but inefficiencies in capturing short term variability. A regional inventory of isoprenoid emissions for European forests was created using each of the three modelling approaches. The models agreed on an average European emissions budget of 1.03 TgC a −1 for isoprene and 0.97 TgC a −1 for monoterpenes for the period 1960-1990, which was dominated by a few species with largest aerial coverage. Species contribution to total emissions depended both on species emission potential and geographical distribution. For projected future climate conditions, however, emissions budgets proved highly model dependent, illustrating the current uncertainty associated with isoprenoid emissions responses to potential future conditions.Correspondence to: T. Keenan (t.keenan@creaf.uab.es) These results suggest that current model estimates of isoprenoid emissions concur well, but future estimates are highly uncertain. We conclude that development of reliable models is highly urgent, but for the time being, future BVOC emission scenario estimates should consider results from an ensemble of available emission models.

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Section: Sitementioning

confidence: 99%

Process based inventory of isoprenoid emissions from European forests: model comparisons, current knowledge and uncertainties

et al. 2009

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“…We estimated the initiation and cessation of GPP from meteorological estimates of daily net ecosystem CO 2 exchange (NEE) between forest and atmosphere following Curtis et al [37]. Detailed meteorological tower instrumentation, specifications, and data gap-filling procedures are described by Schmid et al [38].…”

Section: Gross and Net Primary Production Initiation And Cessationmentioning

confidence: 99%

Phenological and Temperature Controls on the Temporal Non-Structural Carbohydrate Dynamics of Populus grandidentata and Quercus rubra

Gough

Flower

Vogel

2010

Forests

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Temporal changes in plant tissue non-structural carbohydrates (NSC) may be sensitive to climate changes that alter forest phenology. We examined how temporal fluctuations in tissue NSC concentrations of Populus grandidentata and Quercus rubra relate to net and gross primary production (NPP, GPP) and their climatic drivers in a deciduous forest of Michigan, USA. Tissue NSC concentrations were coupled with NPP and GPP phenologies, declining from dormancy until GPP initiation and then increasing following NPP cessation. Warmer autumns extended the temporal gap between NPP and GPP cessation, prolonging the period of NSC accumulation. These results suggest that tissue NSC concentrations may increase with climate change.

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“…Soil-surface CO 2 efflux (R soil ; 'soil respiration') is the largest flux of C in forests outside of gross primary productivity (Law et al, 1999;Janssens et al, 2001) and is the dominant component of ecosystem respiration (Bolstad et al, 2004;Curtis et al, 2005;Yuste et al, 2005). In turn, ecosystem respiration can determine the overall C balance of terrestrial ecosystems (Valentini et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

A non‐native invasive grass increases soil carbon flux in a Hawaiian tropical dry forest

Litton

Sandquist

Cordell

2008

Global Change Biology

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Non-native plants are invading terrestrial ecosystems across the globe, yet little is known about how invasions impact carbon (C) cycling or how these impacts will be influenced by climate change. We quantified the effect of a non-native C 4 grass invasion on soil C pools and fluxes in a Hawaiian tropical dry forest over 2 years in which annual precipitation was average (Year 1) and $ 60% higher than average (Year 2). Work was conducted in a series of forested plots where the grass understory was completely removed (removal plots) or left intact (grass plots) for 3 years before experiment initiation. We hypothesized that grass invasion would: (i) not change total soil C pools, (ii) increase the flux of C into and out of soils, and (iii) increase the sensitivity of soil C flux to variability in precipitation. In grass plots, grasses accounted for 25-34% of litter layer C and $ 70% of fine root C. However, no differences were observed between treatments in the size of any soil C pools. Moreover, grass-derived C constituted a negligible fraction of the large mineral soil C pool (o3%) despite being present in the system for ! 50 years. Tree litterfall was $ 45% lower in grass plots, but grass-derived litterfall more than compensated for this reduction in both years. Annual cumulative soil-surface CO 2 efflux (R soil ) was $ 40% higher in grass plots in both years, and increased in both treatments by $ 36% in the wetter Year 2. Despite minimal grassderived mineral soil C, 475% of R soil in grass plots was of C 4 (i.e. grass) origin. These results demonstrate that grass invasion in forest ecosystems can increase the flux of C into and out of soils without changing total C pools, at least over the short term and as long as the native tree canopy remains intact, and that invasion-mediated changes in belowground C cycling are sensitive to precipitation.

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Respiratory carbon losses and the carbon‐use efficiency of a northern hardwood forest, 1999–2003

Cited by 131 publications

References 82 publications

Process based inventory of isoprenoid emissions from European forests: model comparisons, current knowledge and uncertainties

Process based inventory of isoprenoid emissions from European forests: model comparisons, current knowledge and uncertainties

Phenological and Temperature Controls on the Temporal Non-Structural Carbohydrate Dynamics of Populus grandidentata and Quercus rubra

A non‐native invasive grass increases soil carbon flux in a Hawaiian tropical dry forest

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