Dendroclimatological Analysis of Wild Pear Pyrus Pyraster (L.) Burgsd. From Biedrusko Military Area (West Poland) — Preliminary Study

Abstract European wild pear (Pyrus pyraster, syn. Pyrus communis subsp. pyraster L.) is widely distributed in Europe, but rarely studied by dendrochronologists. This preliminary study was aimed to assess the age and effect of climate on tree-ring width in the largest Polish population of P. pyraster, in Biedrusko military area (western Poland). On the basis of samples from 21 trees, a chronology (BIE) was constructed, covering 45 years (1963–2007). Mean tree-ring width in the studied trees is 1.92 mm. The performed analyses (pointer years, correlations, and response function) indicate that tree-ring width is strongly dependent on weather conditions in the year preceding formation of the tree-ring. Annual rings of pear trees were wide after cold and rainy previous summer and after rainy previous October, while in the current year, ring width was affected by insolation in February and temperature in August (positive correlations) and precipitation in May (negative correlation). The low similarity of the ring-width pattern and effect of climate on tree-ring width between this population and a wild pear population from the Bielinek Reserve, located 200 km away, indicate that tree-ring width in this species is strongly dependent on habitat and there is a need to continue dendrochronological analyses.

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Pointer Years in Tree-Ring Width of European Ash with Different Crown Condition and Their Relationships with Climatic Factors in Latvia

Proceedings of the Latvian Academy of Sciences Section B Natural Exact and Applied Sciences ◽

10.1515/prolas-2016-0019 ◽

2016 ◽

Vol 70 (3) ◽

pp. 116-123

Author(s):

Roberts Matisons ◽

Linda Gerra Inohosa ◽

Māris Laiviņš

Keyword(s):

Tree Ring ◽

Climatic Factors ◽

Ring Width ◽

Weather Conditions ◽

Growth Patterns ◽

Limiting Factors ◽

Tree Ring Width ◽

Crown Condition ◽

Pointer Years ◽

European Ash

Abstract The effect of climatic factors on tree-ring width (TRW) of European ash (Fraxinus excelsior L.) with healthy and damaged crowns growing in the central and eastern part of Latvia was assessed by dendrochronological techniques. Pointer year indices were calculated to assess the variability of TRW. Positive pointer years were more frequent than negative, similarly for damaged and healthy trees, suggesting similar limiting factors. The relationships between TRW and climatic factors differed regionally and locally. In the eastern part of Latvia, TRW was affected by temperature in spring of current and preceding years. In the central part of Latvia, weather conditions in current and preceding summer mainly affected TRW; temperature and precipitation had positive effect suggesting occurrence of water deficit, but the daily range of temperature had a negative effect. Hence, regional diversification of radial growth patterns might be expected. Some differences in sensitivity to climate were observed between the damaged and healthy trees. In the central part of Latvia, the damaged trees appeared additionally sensitive to temperature in summer. In the eastern part of Latvia, damaged trees were additionally sensitive to temperature in May. Nevertheless, some additional factors were significant for the healthy trees.

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Relations between tree-ring widths, climate, and annual area burned in the boreal forest of Alberta

Canadian Journal of Forest Research ◽

10.1139/x95-189 ◽

1995 ◽

Vol 25 (11) ◽

pp. 1746-1755 ◽

Cited By ~ 47

Author(s):

C.P.S. Larsen ◽

G.M. MacDonald

Keyword(s):

Boreal Forest ◽

Tree Ring ◽

National Park ◽

Ring Width ◽

Weather Conditions ◽

Fire Weather ◽

Severity Rating ◽

Area Burned ◽

Positive Correlations ◽

Wood Buffalo National Park

Ring-width chronologies from three white spruce (Piceaglauca (Moench) Voss) and two jack pine (Pinusbanksiana Lamb.) sites in the boreal forest of northern Alberta were constructed to determine whether they could provide proxy records of monthly weather, summer fire weather, and the annual area burned by wildfires in Wood Buffalo National Park. All but one of the standard and residual chronologies exhibited significant positive correlations with June precipitation in the growth year, and all but three of the chronologies exhibited positive correlations with precipitation in June, July, or August of the previous year. Three of the residual chronologies also exhibited negative correlations with June temperature in the growth year. Four of the standard and residual chronologies exhibited significant correlations with the Seasonal Severity Rating fire weather variable from Fort Smith, N.W.T. Four of the standard chronologies and three of the residual chronologies exhibited significant correlations with the annual area burned in Wood Buffalo National Park. Significant correlations were also found for some of the standard and residual chronologies with fire weather and annual area burned in the previous year. These results suggest that ring widths and annual area burned in this portion of the boreal forest are sensitive to similar weather conditions. Tree-ring records may therefore provide a useful means of examining decadal to centennial length relations between climate and annual area burned in the boreal forest.

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Pointer years in tree-ring width and earlywood-vessel area time series of Quercus robur—Relation with climate factors near its northern distribution limit

Dendrochronologia ◽

10.1016/j.dendro.2012.10.001 ◽

2013 ◽

Vol 31 (2) ◽

pp. 129-139 ◽

Cited By ~ 14

Author(s):

Roberts Matisons ◽

Didzis Elferts ◽

Guntis Brūmelis

Keyword(s):

Time Series ◽

Tree Ring ◽

Quercus Robur ◽

Ring Width ◽

Climate Factors ◽

Tree Ring Width ◽

Pointer Years ◽

Vessel Area ◽

Northern Distribution ◽

Earlywood Vessel

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Influence of climatic conditions and air pollution on radial growth of Scots pine (Pinus sylvestris L.) in Szczecin’s city forests

Forest Research Papers ◽

10.2478/frp-2018-0011 ◽

2018 ◽

Vol 79 (2) ◽

pp. 105-112

Author(s):

Anna Cedro ◽

Bernard Cedro

Keyword(s):

Air Pollution ◽

Pinus Sylvestris ◽

Tree Ring ◽

Scots Pine ◽

Radial Growth ◽

Ring Width ◽

Weather Conditions ◽

Tree Ring Width ◽

Relative Growth ◽

Chemical Factory

Abstract The aim of the present work was to characterize the growth – climate relationship of pines growing in the Szczecin city forests in intensively used recreational areas and to identify the effect of air pollutants emitted by a nearby chemical factory on tree-ring width. Our research area was located in the Głębokie forest complex, which is one of the most frequently visited. The chemical factory Police that produces fertilizers is located at a distance 11 km away from the study plot. The largest emissions of pollutants from the factory in terms of volume occurred in the 1980s and early 1990s. Wood samples were collected from Scots pine (Pinus sylvestris L.) with the Pressler borer from 30 trees and examined using standard dendrochronological methodology. The result was a local chronology of 169 years from 1848–2016. Dendroclimatological analyses indicated that the weather conditions at the turn from winter to spring are the dominant factors influencing radial growth. For example, higher than average temperatures in February, March and April result in a wide tree-ring in the upcoming growth season. Following Nowacki and Abram’s method, we also determined the relative growth change in order to delimit the timeframe when air pollution potentially alters tree-ring width. Due to the lack of data for the period 1848–1945, the increasing and decreasing relative growth could not be linked to specific events. For the period 1944–1972 however, we observed and increase in the tree-ring width, which in this case can be attributed to favorable weather conditions. The final period, 1973–1991, on the other hand showed the strongest decline in annual growth throughout our chronology and this was largely due to the nearby chemical factories, which released huge amounts of pollution into the atmosphere during this period. At present, despite new technologies and a decrease in overall production by the nearby chemical factory, we found a negative trend in ring width dynamics indicating a need for pollutant monitoring and further research.

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Climate Signals in Earlywood, Latewood and Tree-Ring Width Chronologies of Sessile Oak (Quercus petraea (Matt.) Liebl.) from Majdanpek, North–Eastern Serbia

Drvna industrija ◽

10.5552/drvind.2021.2016 ◽

2021 ◽

Vol 72 (1) ◽

pp. 79-87

Author(s):

Nenad Radaković ◽

Branko Stajić

Keyword(s):

Tree Ring ◽

Ring Width ◽

Quercus Petraea ◽

Tree Ring Width ◽

Climate Data ◽

Climate Conditions ◽

Sessile Oak ◽

Pointer Years ◽

Temperature And Precipitation ◽

North Eastern

In this article, the dependence of the sessile oak (Quercus petraea (Matt.) Liebl.) radial growth (tree-ring, earlywood, and latewood widths) on climate (the mean monthly temperature and precipitation totals) was studied in the Majdanpek area, north-eastern Serbia. The growth response of the oak trees to the prevailing climate conditions was dendroecologically investigated, by applying the correlation and response function, as well as by pointer years analysis. The site chronology covered 159 years (1855-2013). We found that latewood and total tree-ring width contain the imprinted positive response to the amount of precipitation in summer months (June and July) of the current growing season. The earlywood width showed no direct dependence on climate data, but it was significantly affected by the previous-year latewood width. Moreover, 40 % of the variation in the latewood width is explained by the earlywood variation in the same season. The temperature was not found to have any significant effect on the growth of oak at the study site. The use of pointer years, determined by applying several calculation procedures, has highlighted previous results, indicating that the precipitation in summer months was the deciding climate factor leading to the occurrence of the years with exceptionally wide or narrow tree-rings and latewood. To enhance our understanding of the response of the sessile oak growth at south-oriented sites with a shallow soil profile to precipitation and temperature variations, and expand the current database and knowledge, future studies should be undertaken.

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Climate Response in Tree-Rings of Sawara Cypress [Chamaecyparis pisifera (Siebold & Zucc.) Endl.] in Poland

Forests ◽

10.3390/f12080967 ◽

2021 ◽

Vol 12 (8) ◽

pp. 967

Author(s):

Anna Cedro ◽

Grzegorz Nowak ◽

Halina Kowalewska-Kalkowska

Keyword(s):

Tree Ring ◽

Function Analysis ◽

Winter Season ◽

Ring Width ◽

Native Forest ◽

Climatic Data ◽

Tree Ring Width ◽

False Rings ◽

Pointer Years ◽

Chamaecyparis Pisifera

Sawara cypress [Chamaecyparis pisifera (Siebold & Zucc.) Endl.] is originally from Japan. It was introduced to Europe in the latter half of the 19th century (in England and Holland in 1861, and in Poland in 1864). The aim of this study was to examine the influence of climatic conditions on tree-ring width among Sawara cypress populations growing in Poland. Additionally, other indicators determining the growth-climate relationship for the studied tree species were investigated such as false rings, missing rings, or frost rings. Five stands of Sawara cypress from northwestern and central Poland were selected for study. Samples were taken from 97 trees, using Pressler borers at breast-height. Tree-ring widths were measured down to 0.01 mm. Climatic data came from weather stations located the nearest to the study plots. Tree-ring width in the studied populations of Sawara cypress varies (from 1.94 to 4.47 mm). The oldest Sawara cypresses grow in Glinna Arboretum and are nearly 130 years old. The youngest ones grow in Rogów Arboretum (67 years old) and Wirty Arboretum (58 years old). Ten regional pointer years, including six negative and four positive ones, were determined for local chronologies. Negative pointer years were associated with the occurrence of cold winters and water shortages in summer. Positive pointer years are mostly periods with a warm winter season, early and warm spring, and with high precipitation totals during summer months. Correlation and response function analysis corroborates the results yielded by pointer year analysis. False rings carry an additional information on pluvial conditions in the summer period, and frost rings are an aid in dating dendrochronological series and indicate the occurrence of both very cold winters and persistent ground frost occurrences in the spring period. In comparison to native conifers, the Sawara cypress can be regarded as a fast-growing species. The knowledge of acclimatization, growth rate, and growth-climate relationship may be useful, especially in the time of a rapidly changing climate, increasing human impact, and highly intensified invasion of insect and fungal species attacking native forest-forming taxa.

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Response of Annual Ring Width and Latewood Content of Scots Pine to Weather Conditions in Provenance Trials

Lesnoy Zhurnal (Forestry Journal) ◽

10.37482/0536-1036-2020-5-64-80 ◽

2020 ◽

pp. 64-80

Author(s):

S.R. Kuzmin ◽

◽

Keyword(s):

Tree Ring ◽

Scots Pine ◽

Ring Width ◽

Weather Conditions ◽

Southern Taiga ◽

Test Point ◽

Forest Steppe ◽

Tree Ring Width ◽

Mean Values ◽

Provenance Trials

Tree-ring width and latewood content were studied to assess the response of wood to growing conditions. Samples were taken from the trees of six Scots pine climatypes with contrast origin, grown in the conditions of provenance trials in southern taiga of Central Siberia (Boguchany forestry) and forest-steppe of Western Siberia (Suzun forestry). A comparative analysis of variance of mean values of the studied features between the climatypes within each test point and between the points is carried out. Correlation analysis was used to analyze the dynamics of the studied traits and as their response to weather conditions over a long period. It was revealed that in the forest-steppe conditions maximal radial increments for all climatypes were observed on average at the age of 9 and in southern taiga at the age of 12–16. Tree-ring width of the climatypes from the south is significantly lower in the foreststeppe conditions than that of of the representatives of northern origin. Climatypes transferred from a warmer climate to southern taiga are characterized by significantly larger values of tree-ring width than in the northernmost of the studied ones. The latewood content decreases in all studied climatypes of pine in southern taiga in comparison with foreststeppe. Significant response of the latewood content of climatypes in forest-steppe is observed not only with average monthly weather conditions of the second part of vegetation period but also with the first. It indicates a higher sensitivity of their wood structure to the complex of climatic and ecological conditions in the provenance trials of forest-steppe compared with southern taiga. The research results show that the Boguchany climatype is genetically stable in terms of the average values of tree-ring width and latewood content in foreststeppe and southern taiga.

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