Quercus robur survival at the rear edge in steppe: Dendrochronological evidence

Netsvetov, Maksym; Prokopuk, Yulia; Ivanko, I. А.; Kotovych, O. V.; Romenskyy, Maksym

doi:10.1016/j.dendro.2021.125843

Cited by 6 publications

(5 citation statements)

References 45 publications

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“…Another monitored study of P. tabulaeformis in the Helan Mountains found that the lower radial growth rate of trees caused by the severe drought event in June was obviously increased in August due to more rainfall [47]. The precipitation distribution in the growing season plays an important role in the radial growth of trees [48,49]. The extreme moisture limitation even caused the radial growth of P. tabulaeformis to appear unimodal, and the peak appeared in August in the late growing season [24].…”

Section: Discussionmentioning

confidence: 99%

Features of Radial Growth Rate of Trees in Agro-Pastoral Transition Zone, Northern China

Sun

Liu

Bao

et al. 2022

Forests

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The Vaganov‒Shashkin process-based model was used to explore the variation characteristic of the radial growth rate of Pinus tabulaeformis in the agro-pastoral transition zone in northern China. The tree-ring width chronologies of the four sampling sites were significantly positively correlated with the simulated series (p < 0.01), and the simulated onset and end dates of tree radial growth indicated that April to October was the main growing season. Temperature affects the radial growth rate of tree stems at the start and end of the growing season, while soil moisture availability affects the radial growth rate in the main growing season. Despite the differences in amplitude, the integral growth rate showed a bimodal pattern, which to some extent responded to the hydrothermal configuration of the East Asian summer monsoon climate. Compared with the peak changes in the summer monsoon fringe area in Northwest China, the highest peak of the integral growth rate in this study area appeared around August in the late growing season, reflecting the adaptability of trees to the local climatic environment. The average values of the integral growth rate and rate due to soil moisture, inferred from extreme wide-ring and narrow-ring years, were significantly different (p < 0.01), while the average growth rates due to temperature were not significant (p > 0.05). The analysis results indicate that moisture availability is a key limiting factor for the radial growth of Pinus tabulaeformis. Our study provides valuable knowledge about the growth processes of the main tree species related to the hydroclimatic variables in northern China and offers a new perspective on mitigating the adverse effects of a warmer climate on the forest in the semi-arid region in the future.

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Section: Discussionmentioning

confidence: 99%

Features of Radial Growth Rate of Trees in Agro-Pastoral Transition Zone, Northern China

Sun

Liu

Bao

et al. 2022

Forests

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“…Global warming is changing forest ecosystems around the world (Vieira et al, 2018), especially in steppe landscapes where tree communities are in unfavourable hydrothermal conditions (Netsvetova et al, 2021). Forests are important ecosystems that have a positive impact on the environment, and thus on the quality of human life (Barana et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Ravine forests have quite diverse microclimatic conditions (Netsvetova et al, 2021). Ravines are places where atmospheric water flows from the surrounding watershed areas.…”

Section: Introductionmentioning

confidence: 99%

Influence of soil moisture level on metabolism of non-structural carbohydrates in Quercus robur leaves

Bessonova

Chonhova

2022

Regul. Mech. Biosyst.

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The long-term increases in average temperature and intensification of droughts which characterise the current state of the Earth’s climate system have a negative impact on forest ecosystems and can lead to a decrease in their area and deterioration of the living conditions of their components. In the conditions of the Ukrainian Steppe an important environmental, antierosion, water-protective and soil-protective role belongs to the ravine forests. The most valuable component of the ravine forests is presented by natural populations of common oak (Quercus robur L.), which are able to tolerate the arid climate typical of the steppe region. But with global warming, the endurance of this species is changing. It is believed that a significant role in plant adaptation to drought and high temperatures may belong to non-structural carbohydrates. Therefore, it is important to study changes in the concentration of these substances in the leaves of this leading species under the action of adverse hydrothermal conditions. The article analyzes the content and dynamics of soluble sugars (glucose, fructose, sucrose) and starch in the leaves of Quercus robur L. under different forest growth conditions of the ravine forest (hygromesophilic (CL2–3), mesoxerophilic (CL1) and xerophilic (CL0)). The research was conducted in the forest in the Viyskove area (steppe zone of Ukraine) in the thalweg and at different levels of slope of southern exposure. Content of glucose, fructose, sugar and starch in Quercus robur leaves was determined. It was found that when exposed to high temperatures and increasing water stress during the vegetation period in xerophilic (CL0–1) and mesoxerophilic (CL1) forest growth conditions, the concentration of both glucose and sucrose in the leaves of Q. robur increases and it becomes much higher than in conditions of more optimal water supply. At the same time, the disaccharide content increases more significantly than that of monosaccharide. The greatest amount of these sugars is observed in the driest months (July, August), when conditions for providing plants with water are the most stressful. When water stress grows the increase in concentration of glucose and sucrose is correlated with reduction of starch content. It has been found that the concentration of fructose in Q. robur leaves in droughty conditions of growing was comparable to more favourable conditions of moisture. In September, there is a decline in the content of all forms of non-structural carbohydrates in the leaves of plants of all variants compared to the previous month, especially in conditions of adverse water supply. Therefore, forest growth conditions do not affect the nature of the dynamics of soluble sugars and starch in the leaves of Q. robur, although they change their quantitative indicators. Based on the protective function of sugars under the action of stressors on plants, we can assume that in conditions of significant lack of moisture in the soil their accumulation in the leaves in areas with mesoxerophilic and xerophilic hygrotopes plays an important role in increasing Q. robur drought resistance.

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“…In modern scientific literature, it is customary to distinguish a number of unfavorable environmental factors affecting the stability of oak forests: meteorological, hydrological, biological and economic. Meteorological factors include: strong winter frosts, summer droughts (which, in turn, are reflected at the groundwater level); biological factors include massive damage to forest stands by harmful insects and damage to them by fungal diseases that disrupt the activity of the assimilation apparatus and thereby cause a strong weakening of IOP Publishing doi:10.1088/1755-1315/1010/1/012124 2 the oak; к economic factors include excessive thinning of stands, which entails a violation of the sanitary minimum and unregulated grazing [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…The degradation of oak forests is caused not by any one factor, but by a complex of interrelated factors, which are difficult and differently combined in various natural and climatic zones and often appear over a long period of time. The Orenburg climatype of pedunculate oak is distinguished by high frost resistance, resistance to crown damage, relatively low damage by powdery mildew and other diseases, and, as a consequence, high preservation of young plants and good taxation indicators [6][7][8]. However, the problem of drying out of oak forests on the territory of the Orenburg region is manifested no less acutely than in other regions, which indicates that the main reason for the degradation of these communities is anthropogenic impact [11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

On the state of the pedunculate oak plants (Quercus robur L.) of the orenburg climatype

Герасименко

Markova

Chekurov

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The degradation of oak forests is an acute problem throughout the territory of the Russian Federation. Pedunculate oak is a valuable and durable tree species. The stability of oak forests is largely determined by biotypic characteristics. However, in recent years, anthropogenic impact is the main reason for the drying out of oak forests, which leads to the death of resistant pedunculate oak climatypes. The article presents the results of a study of pure stands of low-stemmed pedunculate oak on the territory of the Orenburg region. The silvicultural characteristics of plantings are given, their phytocenotic structure is described. It was found that in dry oak forests and oak undergrowth the stand was characterized by a low growth class, in fresh oak forests the highest growth class was noted. The plant density varied significantly from 0.3 to 0.7. In dry oak forests, the density index tended to decrease with age. The maximum plant density was observed at the junction of ripe and overmature ages, at the age of 60 years. The state of pure pedunculate oak stands on the territory of the Orenburg region can be assessed at the moment as satisfactory, but requires significant measures to promote seed reforestation.

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Quercus robur survival at the rear edge in steppe: Dendrochronological evidence

Cited by 6 publications

References 45 publications

Features of Radial Growth Rate of Trees in Agro-Pastoral Transition Zone, Northern China

Features of Radial Growth Rate of Trees in Agro-Pastoral Transition Zone, Northern China

Influence of soil moisture level on metabolism of non-structural carbohydrates in Quercus robur leaves

On the state of the pedunculate oak plants (Quercus robur L.) of the orenburg climatype

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