scholarly journals Prospects of Using Tree-Ring Earlywood and Latewood Width for Reconstruction of Crops Yield on Example of South Siberia

Forests ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 174
Author(s):  
Elena A. Babushkina ◽  
Dina F. Zhirnova ◽  
Liliana V. Belokopytova ◽  
Nivedita Mehrotra ◽  
Santosh K. Shah ◽  
...  
Keyword(s):  
Tree Ring ◽  
Spring Barley ◽  
Ring Width ◽  
Siberian Larch ◽  
Forest Steppe ◽  
Study Region ◽  
Yield Variation ◽  
South Siberia ◽  
Crops Yield ◽  
Reconstruction Model

Improvement of dendrochronological crops yield reconstruction by separate application of earlywood and latewood width chronologies succeeded in rain-fed semiarid region. (1) Background: Tree-ring width chronologies have been successfully applied for crops yield reconstruction models. We propose application of separated earlywood and latewood width chronologies as possible predictors improving the fitness of reconstruction models. (2) Methods: The generalized yield series of main crops (spring wheat, spring barley, oats) were investigated in rain-fed and irrigated areas in semiarid steppes of South Siberia. Chronologies of earlywood, latewood, and total ring width of Siberian larch (Larix sibirica Ledeb.) growing in forest-steppe in the middle of the study area were tested as predictors of yield reconstruction models. (3) Results: In the rain-fed territory, separation of earlywood and latewood allowed increasing variation of yield explained by reconstruction model from 17.4 to 20.5%, whereas total climatic-driven component of variation was 41.5%. However, both tree-ring based models explained only 7.7% of yield variation in the irrigated territory (climate inclusion increased it to 34.8%). Low temperature sensitivity of larch growth was the main limitation of the model. A 240-year (1780–2019) history of crop failures and yield variation dynamics were estimated from the actual data and the best reconstruction model. (4) Conclusions: Presently in the study region, breeding of the environment-resistant crops varieties compensates the increase of temperature in the yield dynamics, preventing severe harvest losses. Tree-ring based reconstructions may help to understand and forecast response of the crops to the climatic variability, and also the probability of crop failures, particularly in the rain-fed territories.

scholarly journals Response of Four Tree Species to Changing Climate in a Moisture-Limited Area of South Siberia

Forests ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 999 ◽  
Author(s):  
Elena A. Babushkina ◽  
Dina F. Zhirnova ◽  
Liliana V. Belokopytova ◽  
Ivan I. Tychkov ◽  
Eugene A. Vaganov ◽  
...  
Keyword(s):  
Water Deficit ◽  
Ring Width ◽  
Siberian Larch ◽  
Water Reservoir ◽  
Forest Steppe ◽  
Limited Area ◽  
Regional Warming ◽  
Xylem Structure ◽  
Moisture Deficit ◽  
South Siberia

The response of vegetation to climate change is of special interest in regions where rapid warming is coupled with moisture deficit. This raises the question of the limits in plants’ acclimation ability and the consequent shifts of the vegetation cover. Radial growth dynamics and climatic response were studied in Scots pine (Pinus sylvestris L.), Siberian larch (Larix sibirica Ledeb.), and silver birch (Betula pendula Roth.) in the forest-steppe, and for Siberian elm (Ulmus pumila L.) in the steppe of South Siberia, as indicators of vegetation state and dynamics. Climate–growth relationships were analyzed by the following two approaches: (1) correlations between tree-ring width chronologies and short-term moving climatic series, and (2) optimization of the parameters of the Vaganov–Shashkin tree growth simulation model to assess the ecophysiological characteristics of species. Regional warming was accompanied by a slower increase of the average moisture deficit, but not in the severity of droughts. In the forest-steppe, the trees demonstrated stable growth and responded to the May–July climate. In the steppe, elm was limited by moisture deficit in May–beginning of June, during the peak water deficit. The forest-steppe stands were apparently acclimated successfully to the current climatic trends. It seems that elm was able to counter the water deficit, likely through its capacity to regulate transpiration by the stomatal morphology and xylem structure, using most of the stem as a water reservoir; earlier onset; and high growth rate, and these physiological traits may provide advantages to this species, leading to its expansion in steppes.

scholarly journals Climate response of tree-ring width in Larix sibirica growing in the drought-stressed forest-steppe ecotone of northern Mongolia

2011 ◽  
Vol 68 (2) ◽  
pp. 275-282 ◽  
Author(s):  
Choimaa Dulamsuren ◽  
Markus Hauck ◽  
Hanns Hubert Leuschner ◽  
Christoph Leuschner
Keyword(s):  
Tree Ring ◽  
Ring Width ◽  
Larix Sibirica ◽  
Forest Steppe ◽  
Climate Response ◽  
Tree Ring Width ◽  
Northern Mongolia

scholarly journals Pine Looper Bupalus piniaria (L.) Outbreaks Reconstruction: A Case Study for Southern Siberia

Insects ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 90
Author(s):  
Denis A. Demidko ◽  
Olga V. Trefilova ◽  
Sergey S. Kulakov ◽  
Pavel V. Mikhaylov
Keyword(s):  
Tree Ring ◽  
Tree Species ◽  
High Efficiency ◽  
Ring Width ◽  
Climate Impact ◽  
New Method ◽  
Pine Forests ◽  
Northern Eurasia ◽  
Forest Steppe ◽  
The Past

The pine looper Bupalus piniaria is one of the most widespread phyllophagous insect species across Northern Eurasia, defoliating Scots pine forests over vast territories. Since there are not enough long-term documented observations on a series of outbreaks, there is a need for methods allowing them to be reconstructed to study their dynamics patterns. Previously, dendrochronological methods were successfully used to solve such issues. However, the most common approach is not applicable for the Western Siberian forest-steppe since it requires comparison with a non-damaged tree species close to pine in terms of longevity and resistance to rot. In the pine forests of the steppe and forest-steppe zones of Western Siberia, there are no species that are not damaged by the pine looper that meets these requirements. Methods allowing not using control species are also not free from disadvantages (e.g., weak specificity). Therefore, we have developed a new method based on the analysis, not of the tree-ring width but the early- and latewood width to reconstruct past defoliation events. The past defoliation by the pine looper is indicated by the presence of a negative pointer year for latewood, followed by a negative pointer year for earlywood in a subsequent year among the majority of individuals. Linear modeling showed a difference between the climate impact on radial growth and the defoliation one. The obtained reconstruction was compared with the results of other methods (mowing window, OUTBREAK, independent component analysis), literature, and Forest Service data. The developed new method (pointer year method; PYM) showed high efficiency confirmed by results of the tree-ring series analysis (11 revealed outbreaks in the past). Compared with other reconstruction techniques under the given conditions (a favorable combination of heat and humidity; probably low-intense and short defoliation), the proposed method provided more precise results than those proposed earlier. Due to high accuracy, the PYM can be useful for detecting late-summer and autumn past defoliations of tree species with clear difference between early- and latewood even though the damage was weak.

scholarly journals Tree Rings Reveal the Impact of Soil Temperature on Larch Growth in the Forest-Steppe of Siberia

Forests ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1765
Author(s):  
Liliana V. Belokopytova ◽  
Dina F. Zhirnova ◽  
David M. Meko ◽  
Elena A. Babushkina ◽  
Eugene A. Vaganov ◽  
...  
Keyword(s):  
Soil Temperature ◽  
Tree Ring ◽  
Air Temperature ◽  
Tree Growth ◽  
Ring Width ◽  
Forest Steppe ◽  
Growth Data ◽  
Maximum Correlation ◽  
Substantial Impact ◽  
The Impact

Dendroclimatology has focused mainly on the tree growth response to atmospheric variables. However, the roots of trees directly sense the “underground climate,” which can be expected to be no less important to tree growth. Data from two meteorological stations approximately 140 km apart in southern Siberia were applied to characterize the spatiotemporal dynamics of soil temperature and the statistical relationships of soil temperature to the aboveground climate and tree-ring width (TRW) chronologies of Larix sibirica Ledeb. from three forest–steppe stands. Correlation analysis revealed a depth-dependent delay in the maximum correlation of TRW with soil temperature. Temperatures of both the air and soil (depths 20–80 cm) were shown to have strong and temporally stable correlations between stations. The maximum air temperature is inferred to have the most substantial impact during July–September (R = −0.46–−0.64) and early winter (R = 0.39–0.52). Tree-ring indices reached a maximum correlation with soil temperature at a depth of 40 cm (R = −0.49–−0.59 at 40 cm) during April–August. High correlations are favored by similar soil characteristics at meteorological stations and tree-ring sites. Cluster analysis of climate correlations for individual trees based on the K-means revealed groupings of trees driven by microsite conditions, competition, and age. The results support a possible advantage of soil temperature over air temperature for dendroclimatic analysis of larch growth in semiarid conditions during specific seasons.

scholarly journals Past crops yield dynamics reconstruction from tree-ring chronologies in the forest-steppe zone based on low- and high-frequency components

2017 ◽  
Vol 62 (5) ◽  
pp. 861-871 ◽  
Author(s):  
Elena A. Babushkina ◽  
Liliana V. Belokopytova ◽  
Santosh K. Shah ◽  
Dina F. Zhirnova
Keyword(s):  
Tree Ring ◽  
High Frequency ◽  
Steppe Zone ◽  
Forest Steppe ◽  
Frequency Components ◽  
Crops Yield

Early summer temperatures since 1670 A.D. for Central Kamchatka reconstructed based on a Siberian larch tree-ring width chronology

1996 ◽  
Vol 26 (11) ◽  
pp. 2048-2052 ◽  
Author(s):  
Moses Gostev ◽  
Gregory Wiles ◽  
Rosanne D'Arrigo ◽  
Gordon Jacoby ◽  
Peter Khomentovsky
Keyword(s):  
Tree Ring ◽  
Ring Width ◽  
Siberian Larch ◽  
Kamchatka Peninsula ◽  
Early Summer ◽  
Model Verification ◽  
Tree Ring Width ◽  
Tree Ring Data ◽  
Summer Temperatures ◽  
Larch Tree

A tree-ring width chronology of larch (Larixkurilensis Mayr) has been developed from along the Bystraya River near Esso in the interior valley of the Kamchatka Peninsula, Russia. The chronology, which covers from 1670 to 1992, explains 38% of the variance in May–June temperatures for the Esso meteorological station. This ring-width series is used to develop the first dendroclimatic reconstruction for Kamchatka. We caution that the Esso station record, the closest to the tree-ring site, is only 42 years in length, making model verification difficult. Periods of above-average temperatures are inferred for ca. 1750, 1800, and over the last few decades; colder than average conditions are inferred for 1710–1720, 1760–1770s, and 1860–1880s. The ring-width chronology cross-dates with other larch tree-ring data for Kamchatka and, during certain intervals, with a larch ring-width record from eastern Siberia. Comparison of the two records suggests that the insertion of a missing ring for the year 1816 in the eastern Siberian series is not justified. A birch (Betulaermanii Cham.) chronology from a coastal site near Petropavlovsk-Kamchatskiy correlates with July–August temperatures. Both the larch and more widespread birch species show promise for further dendroclimatic studies in Kamchatka.

scholarly journals Climate change and tree growth in the Khakass-Minusinsk Depression (South Siberia) impacted by large water reservoirs

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
D. F. Zhirnova ◽  
L. V. Belokopytova ◽  
D. M. Meko ◽  
E. A. Babushkina ◽  
E. A. Vaganov
Keyword(s):  
Climate Change ◽  
Tree Ring ◽  
Tree Growth ◽  
Ring Width ◽  
Warm Season ◽  
Plant Performance ◽  
Climatic Data ◽  
Water Reservoirs ◽  
Local Climate ◽  
South Siberia

AbstractRegional and local climate change depends on continentality, orography, and human activities. In particular, local climate modification by water reservoirs can reach far from shore and downstream. Among the possible ecological consequences are shifts in plant performance. Tree-ring width of affected trees can potentially be used as proxies for reservoir impact. Correlation analysis and t-tests were applied to climatic data and tree-ring chronologies of Pinus sylvestris L. and Larix sibirica Ledeb. from moisture-deficit habitats in the intermontane Khakass-Minusinsk Depression, to assess modification of climate and tree growth by the Krasnoyarsk and Sayano-Shushenskoe Reservoirs on the Yenisei River. Abrupt significant cooling in May–August and warming in September-March occurred after the launch of the turbines in dams, more pronounced near the Sayano-Shushenskoe dam (up to – 0.5 °C in summer and to + 3.5 °C in winter) than near the Krasnoyarsk Reservoir headwaters (– 0.3 °C and + 1.4 °C). Significant lengthening of the warm season was also found for temperature thresholds 0–8 °C. Shifts of seasonality and intensity occurred in climatic responses of all tree-ring chronologies after development of water reservoirs. Patterns of these shifts, however, depended on species-specific sensitivity to climatic modification, distance from reservoirs, and physiographic regions. Mitigation of climate continentality and extremes by reservoirs appears to have offset possible negative effects of warming on tree growth.

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