Short-term CO2 emissions from planted soil subject to elevated CO2 and simulated precipitation

Smart, David R.; Peñuelas, Josep

doi:10.1016/j.apsoil.2004.07.011

Cited by 35 publications

(28 citation statements)

References 31 publications

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“…Overall, across a variety of ecosystems, soil function has been shown to respond rapidly to wetting events as indicated by the soil CO 2 efflux (Liu et al 2002;Smart & Penuelas 2005;Sponseller 2007;Chou et al 2008;Chen et al 2009;Zeglin et al 2013) suggesting that resident, metabolically inactive organisms rapidly gain their metabolic and physiological activities after unfavorable environmental conditions. Combining warming treatments with manipulation of precipitation may further exaggerate loss of water from the soil profile (Sheik et al 2011) and therefore reduce the periods of metabolic activity.…”

Section: Discussionmentioning

confidence: 99%

Tallgrass prairie soil fungal communities are resilient to climate change

Jumpponen

Jones

2014

Fungal Ecology

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Section: Discussionmentioning

confidence: 99%

Tallgrass prairie soil fungal communities are resilient to climate change

Jumpponen

Jones

2014

Fungal Ecology

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“…On an ecosystem scale, however, much evidence suggests that temporal R s variation would also be affected by seasonal precipitation (Walker et al 1995;Galen and Stanton 1999;Hattenschwiler and Smith 1999;Weatherly et al 2003;Ma et al 2005;Monson et al 2005;Smart and Penuelas 2005;Wahren et al 2005). In dry environments, it has been reported that individual precipitation events temporarily increase respiration rates Smart and Penuelas 2005), and precipitation is associated with interannual R s variation in savannas, bushlands, and deserts (Raich et al 2002).…”

Section: Introductionmentioning

confidence: 96%

Precipitation drives interannual variation in summer soil respiration in a Mediterranean-climate, mixed-conifer forest

Concilio

Chen

et al. 2008

Climatic Change

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Predictions of future climate change rely on models of how both environmental conditions and disturbance impact carbon cycling at various temporal and spatial scales. Few multi-year studies, however, have examined how carbon efflux is affected by the interaction of disturbance and interannual climate variation. We measured daytime soil respiration (R s ) over five summers (June-September) in a Sierra Nevada mixed-conifer forest on undisturbed plots and plots manipulated with thinning, burning and their combination. We compared mean summer R s by year with seasonal precipitation. On undisturbed plots we found that winter precipitation (PPT w ) explained between 77-96% of interannual variability in summer R s . In contrast, spring and summer precipitation had no significant effect on summer R s . PPT w is an important influence on summer R s in the Sierra Nevada because over 80% of annual precipitation falls as snow between October and April, thus greatly influencing the soil water conditions during the following growing season. Thinning and burning disrupted the relationship between PPT w and R s , possibly because of significant increases in soil moisture and temperature as tree density and canopy 110 Climatic Change (2009) 92:109-122 cover decreased. Our findings suggest that R s in some moisture-limited ecosystems may be significantly influenced by annual snowpack and that management practices which reduce tree densities and soil moisture stress may offset, at least temporarily, the effect of predicted decreases in Sierran snowpack on R s .

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“…Exchange of CO 2 across the sediment-air interface is probably weakened by a less steep pCO 2 gradient across the interface under stagnant conditions and at a sedimentary pH .7; particularly in the light (Vanderborght et al 2002;Borges et al 2004). This may create a transient storage or depletion of pore-water TCO 2 during air exposure, followed by an excessive initial exchange just after flooding (Smart and Peñ uelas 2005). Any such rapid pulse of TCO 2 to or from the overlying water will not be captured when sediment-water flux incubations, as here, are initiated 3 h after sediment flooding.…”

Section: C+pmentioning

confidence: 99%