Spatial and seasonal variations in stem CO2 efflux of Pinus canariensis at their upper distribution limit

Brito, Patricia; Morales, D.; Wieser, Gerhard; Jiménez, María Soledad

doi:10.1007/s00468-010-0423-z

Cited by 31 publications

(21 citation statements)

References 53 publications

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“…In conclusion, the stem CO 2 efflux increased with the temperature of the woody tissue, as many other studies have found (Teskey et al, 2008;Brito et al, 2010Brito et al, , 2013Yang et al, 2012). Thus, the stem CO 2 efflux increased according to the following series: winter, autumn, spring and summer.…”

Section: Discussionsupporting

confidence: 60%

“…Because most transpiration occurs during the day, the stem CO 2 efflux is expected to be lower during the day than at night (Martin et al, 1994;Maier and Clinton, 2006;Teskey et al, 2008;Höltta andKolari, 2009: Gruber et al, 2009;Brito et al, 2010). Alternative explanations include the possibility that (i) the temperatures measured a short distance beneath or at the surface of the bark, as in this study, may not be representative of the temperatures experienced by most of the respiring biomass (Derby and Gates, 1966); (ii) some CO 2 is stored temporarily (Höltta and Kolari, 2009); and (iii) stem respiration depends also on plant water stress (Lavigne, 1987;Teskey et al, 2008;Saveyn et al, 2007), which might be more severe during the day than during the night.…”

Section: Discussionmentioning

confidence: 99%

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STEM AND SOIL CO2 Efflux Responses Of Pinus radiata PLANTATIONS TO TEMPERATURE, SEASON, AGE, TIME (DAY/NIGHT) AND FERTILIZATION

Bown

Watt²

2016

Cienc. Inv. Agr.

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H.E. Bown, and M.S. Watt. 2016. Stem and soil CO 2 efflux responses of Pinus radiata plantations to temperature, season, age, time (day/night) and fertilization. Cien. Inv. Agr. 43(1):95-109. Stem CO 2 efflux is a highly variable component of the carbon budget of forest ecosystems. It reflects the balance between the CO 2 respired by the living stem tissues, less the CO 2 dissolved in the xylem sap moving upward in the transpiration stream, plus the CO 2 transported from the roots and released at the stem. Although knowledge about such fluxes at different spatial and temporal scales has markedly increased, knowledge of the effects of silviculture treatments, such as fertilization, on stem CO 2 effluxes are still limited, particularly when connecting above-and belowground processes. Using measurements obtained from twin plots (one control, one fertilized) installed in five-, 12-and 23-year-old stands of Pinus radiata, the objective of this study was to examine the influence of the temperature, stand age, fertilization, season and time of measurement (day/night) on the stem CO 2 efflux, soil CO 2 efflux and their ratio. There was a strong significant positive relationship between the stem CO 2 efflux and temperature. The slope between these two variables declined as the stand age increased and was higher for nighttime than daytime measurements. The stem CO 2 efflux was higher in the fertilized plots compared with the unfertilized (control) plots for the 5-and 12-but not the 23-year-old age classes. In contrast, the soil CO 2 efflux was largely unaffected by the temperature, time of measurement (day/night), fertilization and stand age; however, significantly higher values of soil CO 2 efflux were measured during spring than during the other seasons. Given the relative invariance of the soil CO 2 efflux to the temperature and treatment effects, the ratio of the stem:soil CO 2 effluxes was affected by the same factors as the stem CO 2 effluxes. These results suggest that fertilization would increase wood production and wood CO 2 efflux without changing the soil CO 2 efflux, thus most likely proportionally increasing aboveground C partitioning and decrease belowground C partitioning, with this effect being enhanced at younger ages.

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Section: Discussionsupporting

confidence: 60%

Section: Discussionmentioning

confidence: 99%

STEM AND SOIL CO2 Efflux Responses Of Pinus radiata PLANTATIONS TO TEMPERATURE, SEASON, AGE, TIME (DAY/NIGHT) AND FERTILIZATION

Bown

Watt²

2016

Cienc. Inv. Agr.

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“…These include: (1) long radial diffusion pathways of CO 2 and high bark resistance to gaseous diffusion (Stockfors 2000;Ceschia et al 2002), (2) CO 2 absorption and transport in the transpiration stream (Teskey and McGuire 2002;Saveyn et al 2007a), (3) corticular photosynthesis, especially important for young stems and branches (Sprugel 1990;Cernusak and Marshall 2000;Wittmann et al 2001Wittmann et al , 2006Pfanz 2007, 2008), (4) cambial activity, substrate supply and growth (Martin et al 1994;Stockfors and Linder 1998;Damesin et al 2002), and (5) other environmental and physiological factors that either directly or indirectly affect E S including sap flow, phenology, stem oxygen concentration, substrate supply, solar radiation, and water deficits Bowman et al 2005;Saveyn et al 2007b;Meir et al 2008;Zach et al 2010;Gruber et al 2009;Aubrey and Teskey 2009;Brito et al 2010;Maier et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Stem CO2 efflux of ten species in temperate forests in Northeastern China

Yang

Teskey²,

Wang

2012

Trees

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Stem CO 2 efflux (E S ) is an important component of forest ecosystem carbon budgets and net ecosystem CO 2 exchange, but little is known about E S in temperate forests in Northeastern China, an area with a large extent of forest. We measured E S along with stem temperature at 1 cm depth (Ts) over a 9 month period in 2007 on ten dominant tree species of secondary forests of the region. Other measurements included the autotrophic component of soil CO 2 efflux (E A ) and stem diameter at breast height (DBH). Our objectives were to (1) examine the seasonal patterns and species differences in E S , and (2) determine the correlations between E S and Ts, DBH and E A . Mean E S for the measurement period ranged from 1.09 to 1.74 lmol CO 2 m -2 s -1 among the ten species. The sensitivity of E S to Ts (Q 10 ) ranged from 1.87 to 2.61. Across the ten species 57-89% of variation in E S was explained by T S and DBH. There was also a linear relationship between mean E S and E A . E S was better predicted by Ts in the dormant season than the growing season, indicating that additional factors such as growth respiration and internal transport of CO 2 in the xylem became more important contributors to E S during the growing season. Stem CO 2 efflux increased, and Q 10 decreased, with increasing DBH in all species. Although temperature exerts strong control on the rate of cellular respiration, we conclude that in tree stems in situ, T S , DBH and many other factors affect the relationship between CO 2 evolution by respiring cells and the diffusion of CO 2 to the stem surface.

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“…树干CO 2 释放通量(E s )占树木自养呼吸的15%-45% (Ryan et al, 1994;Maier et al, 2004;肖复明等, 2005), 是树木和森林生态系统年碳平衡的重要组分。 E s 能消耗森林生态系统总初级生产力的 8%-13%, 对森林生产力有重要的影响 (Ryan et al, 1994;Maier et al, 2004;Zha et al, 2004) (Zha et al, 2004;Cavaleri et al, 2006;Brito et al, 2010;Araki et al, 2015)。绝大多数温带和北方森林树木E s 的经典季节变化模式为: 在温度高、树干生长快速的夏季达到高峰值, 在低温、树干生长停止的秋冬季减小到最小值 (Lavigne & Ryan, 1997;Zha et al, 2004;Gruber et al, 2009;Yang et al, 2012a); 相反, 处于终年温暖、树干全年生长的热带地区树木的E s 的季节动态格局更加复杂化, 比如干旱季节的E s 低于 (严玉平等, 2008;Stahl et al, 2011) 或高于 (Zach et al, 2010) (Zha et al, 2004;Brito et al, 2010;Araki et al, 2015)。此外, 底物供应 (Maier et al, 2010)、形成层活动 (Gruber et al, 2009)、树干生长 (Brito et al, 2010;Araki et al, 2015)、边材氮浓度 (Maier, 2001;孙涛等, 2015) (Cavaleri et al, 2006)和生长节律、液流速度 (Katayama et al, 2016)、底物供应 (Zach et al, 2010)、土壤含水量 (Stahl et al, 2011)等生物或非生物因子才是主导该区域E s 季节变化的主要因素。另外, 虽然目前有许多研究指出同一树种内不同树木个体间和同一树木个体内不同部位间的 E s 存在很大差异 (Ceschia et al, 2002;Bowman et al, 2005;Yang et al, 2012b) 王淼等, 2008;石新立等, 2010;王秀伟等, 2011;许飞等, 2011;Yang et al, 2012a;孙涛等, 2015 …”

unclassified

“…(Gruber et al, 2009)或者无影响 (Brito et al, 2010;Araki et al, 2015) Steppe et al, 2007), Maier et al, 1998;Stockfors & Linder, 1998 et al, 1994;Brito et al, 2010;Yang et al, 2012b …”

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Seasonality and drivers of stem CO<inf>2</inf> efflux for four temperate coniferous tree species

2017

Chinese Journal of Plant Ecology

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4种温带针叶树种树干CO 2 释放通量的季节动态及其驱动因子许 AbstractAims Stem CO 2 efflux (E s ) is an important component of annual carbon budget in forest ecosystems, but how biotic and environmental factors regulate seasonal and inter-specific variations in E s is poorly understood. The objectives of this study were: (1) to compare seasonal dynamics in E s for four temperate coniferous tree species in northeastern China, including Korean pine (Pinus koraiensis), Korean spruce (Picea koraiensis), Mongolian pine (Pinus sylvestris var. mongolica), and Dahurian larch (Larix gmelinii); and (2) to explore factors driving the inter-specific variability in E s during the growing and non-growing seasons.Methods Ten to twelve trees for each tree species were sampled for E s and stem temperature at 1 cm depth beneath the bark (T s ) measurements in situ with an infrared gas analyzer (LI-6400 IRGA) and a digital thermometer, respectively, from July to October 2013 and March to July 2014. The daily stem circumference increment (S i ), sapwood nitrogen concentration ([N]), and related environmental factors were monitored simultaneously. Important findingsThe temporal variation in E s for the four tree species overall followed the changes in T s throughout the study period, with the maxima occurring in the summer months (late May to early July) characterized by higher temperature and more rapid stem growth and the minima in spring (late March to April) or autumn (October) having lower temperature. T s accounted for 42%-91% and 56%-89% of variations in E s during the growing (May to September) and non-growing (other months) seasons, respectively. Furthermore, apart from T s , we also found significant regression relationships between E s and S i , relative air humidity and [N] during the © Chinese Journal of Plant Ecology

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Spatial and seasonal variations in stem CO2 efflux of Pinus canariensis at their upper distribution limit

Cited by 31 publications

References 53 publications

STEM AND SOIL CO2 Efflux Responses Of Pinus radiata PLANTATIONS TO TEMPERATURE, SEASON, AGE, TIME (DAY/NIGHT) AND FERTILIZATION

STEM AND SOIL CO2 Efflux Responses Of Pinus radiata PLANTATIONS TO TEMPERATURE, SEASON, AGE, TIME (DAY/NIGHT) AND FERTILIZATION

Stem CO2 efflux of ten species in temperate forests in Northeastern China

Seasonality and drivers of stem CO<inf>2</inf> efflux for four temperate coniferous tree species

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