Early–latewood carbon isotope enhances the understanding of the relationship between tree biomass growth and forest-level carbon fluxes

Jia, HanSen; Zhou, Yu; Zhang, Jinsong; Sun, Shuang; Meng, Ping

doi:10.1016/j.agrformet.2022.108818

Cited by 4 publications

(2 citation statements)

References 54 publications

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“…For Q. variabilis , a higher percentage of consumption of stored nonstructural carbohydrates during drought events resulted in a positive trend in Rt-iWUEr (higher S Rt-iWUEr ), further limiting the ability of trees to recover following drought occurrences ( Galiano et al., 2012 ; Rosas et al., 2013 ). No evidence of such depletion of individuals was found in this study, but inconsistent findings were found between net ecosystem productivity based on eddy covariance and Q. variabilis biomass growth based on biometric methods in a local mixed deciduous plantation dominated by Q. variabilis during drought events, partly because of the consumption of stored non-structural carbohydrates ( Jia et al., 2022 ).…”

Section: Discussioncontrasting

confidence: 80%

Drought effects on tree growth, water use efficiency, vulnerability and canopy health of Quercus variabilis-Robinia pseudoacacia mixed plantation

et al. 2022

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Drought-induced forest canopy die-back and tree mortality have been commonly recorded in the lithoid mountainous regions of northern China. However, the capacity of trees to regulate their carbon and water balance in response to drought remains inadequately understood. We measured tree growth, intrinsic water use efficiency (iWUE), vulnerability, and canopy health during drought events using dendrochronology, C isotope measurements, and a tree canopy health survey in a mixed plantation of Quercus variabilis and Robinia pseudoacacia. Resistance (Rt), recovery (Rc), resilience (Rs), and increased amplitude in iWUE compared to the indices 3 years before drought (iWUEr) were calculated for each species across the dominant tree (D), co-dominant tree (CD), and suppressed tree (S). Our results revealed that D and CD showed lower Rt, higher Rc, and higher iWUEr than S. After exposure to multiple sequential drought events, Q. variabilis showed an increasing trend in Rt, and R. pseudoacacia showed a decreasing trend in Rc. R. pseudoacacia exhibited a more conservative strategy towards drought, resulting in a negative SRt-iWUEr (slope of the linear model fitted to capture the trend between Rt and iWUEr) during drought events than Q. variabilis. For individual trees, lower Rc or positive SRt-iWUErQ. variabilis and negative SRt-iWUErR. pseudoacacia were more susceptible to canopy die-back. In conclusion, our study offers a new perspective for improved management practices in the design of silvicultural actions for forestry plantations in lithoid mountainous areas with increasing drought risk.

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Section: Discussioncontrasting

confidence: 80%

Drought effects on tree growth, water use efficiency, vulnerability and canopy health of Quercus variabilis-Robinia pseudoacacia mixed plantation

et al. 2022

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“…Ongoing global changes exert pressure across most terrestrial ecosystems, particularly on forest ecosystems that serve efficient carbon (C) sink function (von Arx et al, 2017; Werner et al, 2021). Hence, growing concerns have been raised about how forest biomes react to lessen the survival threats posed by changing environments (Jia et al, 2022; Martinez‐Sancho et al, 2022). Trade‐offs depend on species‐specific strategies for resource allocation, which typically arise when multiple functions of an organism share finite energy simultaneously (Herrera‐Ramírez et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Carbon stress causes preferential storage over growth in treeline trees

He,

Shi,

et al. 2024

Physiologia Plantarum

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Non‐structural carbohydrates (NSCs) play an important functional role in determining plant survival as a backup carbon (C) source, while they also represent a large C sink being traded off against other C sinks when facing stress. However, information regarding how such trade‐offs in C allocation under C stress vary among species remains limited. Here, we experimentally induced C stress in juveniles of three tree species by exposing them to in situ artificial shading, and then we quantified the dynamics of whole‐tree C allocation patterns between storage and growth. For light‐demanding deciduous conifer larch and shade‐intolerant deciduous broad‐leaved birch, tree growth (represented by relative tree height growth (RHG) and relative basal area increment (RBAI)) was significantly reduced by shading, whereas for shade‐tolerant evergreen conifer fir, RHG and RBAI remained constant. Variations of whole‐tree NSC reserves were consistent for non‐treeline tree species (i.e., birch and fir), showing that shading remarkably reduced NSC storage. In contrast, shading‐induced NSC accumulation was found only in treeline tree species (i.e., larch). More importantly, C allocation to NSC storage was prioritized over structural growth only in larch under C stress, suggesting a strong trade‐off between survival and growth in treeline trees. Overall, our results discovered different patterns of C allocation in response to C stress across species with different plant functional types, further highlighting the highly conservative survival strategy of treeline tree species. Our study may contribute to an enhanced understanding of how forest biomes mitigate the negative impacts of stressful events in the context of global changes.

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A dataset of carbon and water flux observations in a <italic>Quercus variabilis</italic> plantation in Xiaolangdi (2016–2017)

HUANG,

ZHOU,

ZHANG

et al. 2023

CSD

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The concern about global change has brought more attention to the role of plantations in the regional carbon and water cycle recently. Quercus variabilis is one of the most widely distributed natural tree species in China. The southern foot of Taihang Mountain is one of the key areas of forestry engineering in China. The study on the observation of water and carbon fluxes in a Quercus variabilis plantation in this area is of great significance to the development of forestry ecological engineering and the evaluation of plantation carbon sink function in China. Henan Xiaolangdi Earth Critical Zone National Research Station on the Middle Yellow River (i.e. XLD) has carried out long-term observation of and research on the carbon and water fluxes in a Quercus variabilis plantation using the eddy covariance technique since 2005. This dataset contains carbon and water flux observations and meteorological data collected from XLD from 2016 to 2017, which have been processed in accordance with the standard quality control system of ChinaFLUX. It covers the data of gross ecosystem primary productivity, ecosystem respiration, net ecosystem carbon exchange, latent heat flux, sensible heat flux and other related meteorological factors, such as air temperature, air relative humidity, vapor pressure, wind speed, wind direction, radiation, soil temperature, soil moisture, precipitation, etc. The dataset is composed of the data collected at the scales of half-hourly, daily, monthly, and yearly intervals. This dataset can provide data support for the management of plantation ecosystems and the assessment of regional carbon budgets. Moreover, it plays a crucial role in promoting data sharing and standardization management of field stations in China.

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Early–latewood carbon isotope enhances the understanding of the relationship between tree biomass growth and forest-level carbon fluxes

Cited by 4 publications

References 54 publications

Drought effects on tree growth, water use efficiency, vulnerability and canopy health of Quercus variabilis-Robinia pseudoacacia mixed plantation

Drought effects on tree growth, water use efficiency, vulnerability and canopy health of Quercus variabilis-Robinia pseudoacacia mixed plantation

Carbon stress causes preferential storage over growth in treeline trees

A dataset of carbon and water flux observations in a <italic>Quercus variabilis</italic> plantation in Xiaolangdi (2016–2017)

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Early–latewood carbon isotope enhances the understanding of the relationship between tree biomass growth and forest-level carbon fluxes

Cited by 4 publications

References 54 publications

Drought effects on tree growth, water use efficiency, vulnerability and canopy health of Quercus variabilis-Robinia pseudoacacia mixed plantation

Drought effects on tree growth, water use efficiency, vulnerability and canopy health of Quercus variabilis-Robinia pseudoacacia mixed plantation

Carbon stress causes preferential storage over growth in treeline trees

A dataset of carbon and water flux observations in a &lt;italic&gt;Quercus variabilis&lt;/italic&gt; plantation in Xiaolangdi (2016&ndash;2017)

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A dataset of carbon and water flux observations in a <italic>Quercus variabilis</italic> plantation in Xiaolangdi (2016–2017)