Spatial and temporal variation in respiration in a young ponderosa pine forest during a summer drought

Law, B. E.; Kelliher, Francis M.; Baldocchi, Dennis; Anthoni, Peter; Irvine, J. E.; Moore, Darrin J.; Tuyl, Steve Van

doi:10.1016/s0168-1923(01)00279-9

Cited by 182 publications

(125 citation statements)

References 45 publications

Supporting

Mentioning

113

Contrasting

Unclassified

Order By: Relevance

“…Some research indicated that closer to the tree, root density was higher (Law et al 2001;Khalid et al 1999;Henson and Chai 1997;Martoyo 1992), and the contribution of roots respiration to total soil respiration was likely to be higher than average (Wang et al 2005). Higher Carbon dioxide flux at the relatively near from the tree before fertilization may also be caused by variability of soil fertility (Table 1).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of NaCl-Stress on Metabolism of NO3-, NH4+ and NO2- at Several Rice Varieties

Utama¹

2010

jts

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

“…Some studies showed that in density of oil palm root decreased when the distance from the tree were wider (Martoyo 1992, Law et al 2001, Khalid et al 1999, Henson and Chai 1997. Therefore, distance of the observation point from the tree may affect the results of measurements of Carbon dioxide fluxes.…”

Section: Introductionmentioning

confidence: 99%

Effect of NaCl-Stress on Metabolism of NO3-, NH4+ and NO2- at Several Rice Varieties

Utama¹

2010

jts

View full text Add to dashboard Cite

show abstract

“…In the open forest like ponderosa pine, shallow soil temperature reached as high as 48 o C at YP and 36 o C at MP in June 2015. It was speculated that stronger increase in temperature may facilitate decomposition of soil organic compound, leading to an increased soil 310 efflux, which accounted for 70% of ecosystem respiration (Law et al, 2001). …”

Section: Differential Response Of Carbon Fluxes To Drought and Heatmentioning

confidence: 99%

“…al., 2001;Ruehr et al, 2012;Thomas et al, 2009;Vickers et al, 2012). Carbon uptake was strongly affected by dryseason precipitation and temperature in young and mature ponderosa pine forests and old-growth Douglas-fir (Falk et al, 2008;Thomas et al, 2009;Vickers et al, 2012).…”

mentioning

confidence: 99%

Influence of concurrence of extreme drought and heat events on carbon and energy fluxes in dominant ecosystems in the Pacific Northwest region

Kwon

Creason

Law

et al. 2018

Preprint

View full text Add to dashboard Cite

Abstract. The impacts of drought intensity and vapor pressure deficit (VPD) beyond historic norms in PacificNorthwest (PNW), USA, are critical in understanding the potential future function and resilience of ecosystems in the region. While ecosystems in this region are adapted to seasonal droughts, June 2015 temperatures were the highest 10 recorded in the region and strongly coupled with relatively low soil moisture. June is usually the best month for growth in the PNW. Here, we examined the impact of the June 2015 climate extremes on carbon and energy fluxes at sagebrush in the high desert, young and mature ponderosa pine in the semi-arid Great Basin, and Douglas-fir in the mesic ecoregion compared to an average climate year (2014). We assessed if the ecosystems recover from extreme climate stress within the growing season. The monthly anomalies in temperature and VPD were 3 standard deviations, 15 and precipitation was 1standard deviationoutside the 30-year mean at all sites. In sagebrush, the carry-over effect of precipitation (i.e., intensive precipitation prior to the drought and heat) mitigated the immediate impact of extreme climate stress, leading to 25-40% increase in net ecosystem production (NEP) and gross primary production (GPP), with little change in ecosystem respiration (RE) and 65% increase in latent heat flux, compared to the June 2014. The drought and heat lowered NEP by 35-65% and GPP by 15-33% in ponderosa pine and Douglas-fir. A greater increase 20 in latent heat flux was observed in Douglas-fir (110%) than in ponderosa pine (<10%) driven by increased evaporation. were corresponding with 30-40% decline and were greater than in mature ponderosa pine (5-20% decline), when compared to the long-term seasonal means (2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015), respectively. Our results suggest that the responses of carbon and energy fluxes to climate extremes differ depending on site-and species-specific characteristics. Douglas-fir is likely to experience more constraints on carbon fluxes than ponderosa pine if the hot and dry season intensifies in the PNW. Given the likelihood of future drought and heat extremes, identifying these anomalous ecological responses to 30 anomalous climate (e.g., the combination of VPD, heat, and dry soil) is critical to improve predictions of physiological thresholds and tolerance of different tree species.Biogeosciences Discuss., https://doi

show abstract

“…Soil CO 2 flux, or soil respiration, plays an important role in the global carbon cycle, constituting approximately 75% of total ecosystem respiration (Law et al 2001). The potential and controversial role of soil CO 2 efflux in accelerating global warming has led to increased attention (Rodeghiero and Cescatti 2005, Vargas and Allen 2008, Li et al 2016.…”

Section: Introductionmentioning

confidence: 99%

Vertical and seasonal variations in soil CO₂ production in a 55-year-old oriental arborvitae (Platycladus orientalis) plantation in China

FanZhiping

TuZhihua

QinYanbin

et al. 2016

The Forestry Chronicle

View full text Add to dashboard Cite

The aim of this work was to explore the vertical and seasonal variations of CO 2 within the soil profile based on Fick's law of diffusion in an oriental arborvitae plantation. We continuously measured the soil CO 2 concentration profile using CO 2 sensors buried at different depths in a coniferous forest in northern China and calculated the CO 2 flux based on the profile measurements using a dynamic model. The diurnal pattern of CO 2 concentration and flux fluctuated during the day and varied less at night. The CO 2 profile had a vertical gradient, with the highest concentrations in the deepest soil layers. The CO 2 flux had a clear seasonal pattern with a maximum in summer and a minimum in winter. The contributions of the H, A, B, and C horizons to the total CO 2 flux were 75.38, 13.52, 7.61, and 3.49%, respectively. Q 10 was 2.668, 4.469, 1.175, and 3.333 in the H, A, B, and C horizons, respectively. The CO 2 flux determined from the concentration profiles agreed well with the CO 2 flux measured by open dynamic chambers, suggesting that this model could be used to successfully measure soil CO 2 emissions and to describe the processes underlying CO 2 efflux.Keywords: Platycladus orientalis plantation, soil CO 2 profile, flux, temperature, water content RÉSUMÉNous avons voulu par ce projet étudier les variations verticales et saisonnières du CO 2 dans le profil pédologique d'après la Loi de la diffusion de Fick dans une plantation de thuya oriental. Nous avons mesuré en continu le profil de concentration de CO 2 dans le sol au moyen de détecteurs de CO 2 enfouis à différentes profondeurs dans le sol d'une forêt de conifères du nord de la Chine et calculé le flux de CO 2 à partir des mesures effectuées le long de ce profil à l'aide d'un modèle dynamique. Le modèle diurne de la concentration de CO 2 ainsi que son flux variaient davantage au cours de la journée que durant la nuit. Le profil de CO 2 présentait un gradient vertical dont les plus fortes concentrations se retrouvaient dans les couches les plus profondes du sol. Le flux de CO 2 suivait un modèle nettement saisonnier, le maximum étant atteint en été et le minimum au cours de l'hiver. Les apports en provenance des horizons H, A, B et C au flux total de CO 2 étaient respectivement de 75,38; 13,52; 7,61 et 3,49 %. Le Q 10 se chiffrait à 2,668; 4,469; 1,175 et 3,333 dans les horizons H, A, B et C respectivement. Le flux de CO 2 établi à partir des profils de concentration était conforme aux flux de CO 2 mesurées en chambre à flux dynamique, laissant entendre que le modèle pourrait être utilisé pour mesurer correctement les émis-sions de CO 2 en provenance du sol et pour décrire les processus d' échappement du CO 2 .Mots clés : plantation de Platycladus orientalis, profil de CO 2 du sol, flux, température, teneur en eau

show abstract

Spatial and temporal variation in respiration in a young ponderosa pine forest during a summer drought

Cited by 182 publications

References 45 publications

Effect of NaCl-Stress on Metabolism of NO3-, NH4+ and NO2- at Several Rice Varieties

Effect of NaCl-Stress on Metabolism of NO3-, NH4+ and NO2- at Several Rice Varieties

Influence of concurrence of extreme drought and heat events on carbon and energy fluxes in dominant ecosystems in the Pacific Northwest region

Vertical and seasonal variations in soil CO₂ production in a 55-year-old oriental arborvitae (Platycladus orientalis) plantation in China

Contact Info

Product

Resources

About

Spatial and temporal variation in respiration in a young ponderosa pine forest during a summer drought

Cited by 182 publications

References 45 publications

Effect of NaCl-Stress on Metabolism of NO3-, NH4+ and NO2- at Several Rice Varieties

Effect of NaCl-Stress on Metabolism of NO3-, NH4+ and NO2- at Several Rice Varieties

Influence of concurrence of extreme drought and heat events on carbon and energy fluxes in dominant ecosystems in the Pacific Northwest region

Vertical and seasonal variations in soil CO2 production in a 55-year-old oriental arborvitae (Platycladus orientalis) plantation in China

Contact Info

Product

Resources

About

Vertical and seasonal variations in soil CO₂ production in a 55-year-old oriental arborvitae (Platycladus orientalis) plantation in China