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Dendroclimatic regions of Douglas fir Pseudotsuga menziesii (Mirb.) Franco in western and northern Poland

100%

Feliksik E., Wilczynski S.

Dendrobiology

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2004

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tom 52

9-15

This study concerned 26 forest stands with Douglas fir situated in Lower Silesia, Great Poland, Pomerania, Warmia and Masuria. Each stand was represented by 24 trees. From each tree an increment core was taken by Pressler’s borer. The principal components analysis showed that the first three principal components accounted for 73% of the variation of chronologies in total. The first principal component was the most convergent with the mean air temperature curve for January–March, the second with the total precipitation for June–August, and the third with the mean temperature for June–August. The first principal component always integrated the chronologies and decided on a similar rhythm of changes in the tree-ring widths. The annual variation of tree-ring widths was also affected by precipitation in summer (June–August), but this differentiated the chronologies. This was reflected by the dispersion of chronologies in respect to the eigenvectors of the second principal component. The third principal component also differentiated the chronologies. Separate groups were formed by the most eastern and the most western localities of the territory under investigations. Thus the Douglas fir growth reactions were mainly affected by the thermal and pluvial conditions of summer and, to a lesser, degree by the thermal conditions of winter. On the basis of these results it was possible to distinguish the dendroclimatically homogeneous regions in western and northern Poland.

2

A 434-year tree-ring chronology of spruce (Picea abies) with indications of Estonian precipitation

84%

Laanelaid A., Helama S., Eckstein D.

Dendrobiology

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2015

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tom 73

In this study, an Estonian tree-ring network of Norway spruce (Picea abies (L.) H.Karst.), originating from both living trees and dead wood of construction wood, was used for determining the growth variations over the past 350 years (AD 1657–2009). Regional curve standardization was used to remove the non-climatic growth variations from the individual tree-ring series prior to dendroclimatic analyses to focus on the low-frequency (long-term and -period) growth variations. Previously, the chronology has been shown to correlate markedly well with Estonian precipitation history. Here we further detail this dendroclimatic connection. Correlations between the Estonian precipitation and treerings improved systematically with both the number of meteorological stations included and with the documented technical advances in the network of instrumental weather observations. The observed June precipiation explains roughly 20 percent of the tree-ring variance over the period when the network of weather observations is densest (1946–2009). On decadal and longer scales, the June precipitation explains higher portion of tree-ring variance, roughly 50 percent, over the full instrumental era (1866–2009). Comparison with previously published and similarly standardized tree-ring chronology from south-eastern Finland, based on Scots pine tree-rings, showed that the two chronologies exhibit several coinciding periods of ameliorated and deteriorated growth.

3

Automation of annual tree increment measurement using vision system

84%

Sioma J., Socha J.

Drewno. Prace Naukowe. Doniesienia. Komunikaty

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2016

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tom 59

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nr 196

4

Extremely narrow and wide tree rings in the Norway spruce (Picea abies (L.) Karst.) of the Białowieza National Park

84%

Koprowski M., Zielski A.

Ecological Questions

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2008

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tom 09

5

Climate and growth of Podocarpus salignus in Valdivia, Chile

84%

Rozas V., Le Quesne C., Munoz A., Puchi P.

Dendrobiology

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2016

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tom 76

Little dendroclimatic research has been conducted on species of Podocarpus, in response to inherent difficulties associated with tree-ring differentiation and cross-dating. We sampled complete stem cross sections from a plantation of Podocarpus salignus trees in Valdivia, Chile, near the southern edge of the species’ range. We measured earlywood, latewood, and total ring widths avoiding ring wedging, and we calculated the corresponding chronologies. The relationship of these chronologies with maximum temperature, precipitation, and sea level pressure was addressed using correlation and redundancy analyses. All chronologies showed a similar response to climate that was consistent with the cloudy, rainy, and temperate conditions of the study area. That is, warm and dry conditions during previous late springs were beneficial, while warm and rainy winters under low atmospheric pressures were detrimental for growth. The observed climatic responses are in contrast to those of conifers from mountainous areas of southern South America. Limitation of carbohydrates available for growth in the following active season was a possible cause for the observed responses to climate. That is, high winter temperatures may deplete stored carbohydrates by increasing respiration, and a high degree of cloud cover reduces the radiation received by the trees in the active season, which may hamper photosynthesis. Our work highlights the dendroclimatological value of Podocarpus salignus to investigate the influence of climatic variation on tree growth and forest productivity.

6

Success of wild pear Pyrus pyraster (L.) Burgsd. in colonization of steep sunny slopes: an interdisciplinary study in the Bielinek Reserve (NW Poland)

84%

Antkowiak W., Cedro A., Prajs B., Wolko L., Michalak M.

Polish Journal of Ecology

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2012

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tom 60

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nr 1

A local population of Pyrus pyraster was studied in dry and warm habitats: xerothermic grasslands Potentillo-Stipetum capillatae and Adonido-Brachypodietum, as well as thermophilous oak forest Quercetum pubescentipetraeae in the forest-steppe Bielinek Reserve (NW Poland). Our aims were to assess: (1) the ability of this species to adapt to extremely dry sites, as a pioneer woody plant; (2) its phytosociological position; and (3) morphological variation and genetic diversity of the local population. The pear trees in Bielinek Reserve seem to reach an optimum in shrub communities of the class Rhamno-Prunetea, but tree age clearly indicates that the grasslands were colonized by wild pear trees already before the shrub communities developed. This indicates that P. pyraster can colonize very dry, eroded sites, such as steep sunny slopes covered by xerothermic grasslands. Wild pear trees form plant communities that are a seral stage followed by forest-shrub communities or thermophilous forests. The species in xerothermic shrub communities of the reserve shows a high constancy. It is also very resistant to extreme temperatures, insolation, drought, and erosion. Its tree-ring width (on average 1.1 mm per year) was strongly related to precipitation and temperature in spring and summer. High precipitation resulted in wider tree rings, while dry years (associated with high air temperature) caused a decrease in tree-ring width. Another significant factor is precipitation in winter, which had a positive influence on tree-ring width. Microsatellite markers revealed a high level of genetic diversity in this population. Our results suggest that wild pear can be recommended for afforestation of areas affected by droughts and disturbed sites in Central Europe. It can be used to increase the heterogeneity of the landscape, e.g. by creation of forest ecotones and for planting along roads and field margins, especially considering the predicted climate change.

7

Dependence of Scots pine tree-rings on climatic conditions in Southern Poland (Carpatian Mts.)

84%

Wilczynski S., Skrzyszewski J.

Electronic Journal of Polish Agricultural Universities. Series: Forestry

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2002

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tom 05

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nr 2

8

Developing frameworks for studies on sedimentary fluxes and budgets in changing cold environments

84%

Beylich A. A., Lamourex S. F., Decaulne A.

Quaestiones Geographicae

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2011

|

tom 30

|

nr 1

9

Dendrochronological pine scale [1622-1996 AD] for the Malopolska Area [South Poland]

84%

Szychowska-Krapiec E.

Bulletin of the Polish Academy of Sciences. Earth Sciences

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1997

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tom 45

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nr 1

10

The effect of air temperature and precipitation on the size of annual growth rings a wild-growing form of the elderberry [Sambucus nigra L.] in the Swietokrzyski National Park

84%

Wilczynski S., Podlaski R.

Journal of Fruit and Ornamental Plant Research

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2005

|

tom 13

11

A method to set up the phases of the tree growth in thickness based on dendrochronology of an English oak

84%

Golabek E., Tukiendorf A.

Electronic Journal of Polish Agricultural Universities. Series Environmental Development

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2004

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tom 07

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nr 2

In the paper we proposed a methodology to distinguish the phases of the tree growth in thickness of an English oak in the past century based on the ring chronology. We analyzed northern, eastern, southern and western tree ring increments using both the statistical modeling and a taxonomic method. Each step of the methodological procedure was described in the paper and the results were displayed graphically in line plots via a dendrogram and set in a table. To familiarize the Reader with the chosen methodology, some general notes over the approaches were added to the text. In the analysis, three phases of the tree thickness growth in the examined monumental English oak in the 20th century were set up statistically. The average-annual increments for these phases were calculated and plotted. The appropriateness of this technique for a practical use in dendrochronology was concluded finally and its wider application suggested.

12

Review and evaluation of methods applied for tree dating

67%

Lukaszkiewicz J.

Annals of Warsaw Agricultural University. Horticulture (Landscape Architecture)

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2003

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tom 24

13

Teleconnection of 23 modern chronologies of Quercus robur and Q. petraea from Poland

67%

Ufnalski K.

Dendrobiology

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2006

|

tom 55

51-56

Quercus robur and Q. petraea are important forest-forming species in Europe. Q. robur is believed to require more fertile soils, to be more tolerant to low temperatures and more sensitive to oak decline than Q. petraea. Thus chronologies of the two species from nearby localities were hypothesised to differ more strongly between species than between localities. Wood cores were collected on 23 research plots in 2 national parks and 12 forest districts. In each locality two plots (one with Q. robur and one with Q. petraea) were established in forest stands of similar age at similar site conditions wherever possible. Similarity between chronologies was assessed by the test of parallel agreement (Gleichlaufigkeit), Pearson correlation coefficients, and principal components. The plots were grouped by the Ward clustering method and according to 1st and 2nd principal components. The first 2 methods segregated chronologies nearly ideally into pairs of species from the same forest district, indicating that the chronologies differ between forest districts but not between species. Chronologies clustered in 2 large groups: northern and southern (on the basis of correlation) or northeastern and southwestern (on the basis of parallel agreement). Principal components also distinguished northeastern and southwestern chronologies, but less clearly. The results suggest that differences in climatic and soil requirements between the 2 oak species are generally too small in comparison with the differences caused by climatic factors.

14

Tree ring chronologies of scots pine (Pinus sylvestris L.), black pine (P. nigra Arnold), and black alder (Alnus glutinosa (L.) Gaertn.) from the Slowinski National Park and neighbouring forests

67%

Kochanowski D., Bednarz B.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

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2007

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tom 06

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nr 4

Tree ring chronologies of Scots pine (Pinus sylvestris L.) and black pine (P. nigra Arnold) from the dry coniferous forest and the fresh mixed coniferous forest, as well as black alder (Alnus glutinosa (L.) Gaertn.) from the alder swamp forest, in the Słowiński National Park and neighbouring forests (Damnica Forest District) are presented. For both pine species 1940, 1956, 1976, and 1996 were the negative signature years, while 1946, 1957, and 1989 were the positive ones. In black alder the diameter increment depressions occurred in 1997 and 1998. The tree ring width in both pine species was positively correlated with the mean monthly air temperatures in February and March, while there was no univocal precipitation-tree growth relationship found. In some cases, in black pine from the fresh mixed coniferous forest and black alder from the alder swamp forest, the statistically significant coefficients describing the precipitation-increment relationship had negative values. The increment depressions, which occurred in both pine species during 1981- -1983, were the result of the nun moth (Lymantria monacha L.) outbreak. Black alder was not attacked by this phyllophagous insect. The positive July precipitation-tree growth relationship was found in both pine species during the nun moth outbreak.

15

Dendroecological characterization of douglas fir (Pseudotsuga menziesii Franco) in the Wielkopolska Region

67%

Feliksik E., Wilczynski S.

Electronic Journal of Polish Agricultural Universities. Series: Forestry

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2003

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tom 06

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nr 1

16

The Dunkeld larch (Larix x marschlinsii Coaz) in Estonia

67%

Sander H., Laanelaid A.

Dendrobiology

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2007

|

tom 57

73-80

It is commonly known that Japanese larch, Larix kaempferi was first introduced in Europe in Great Britain in 1861. In the presence of European larches, L. decidua it was not long before the first hybrids between these species, called Dunkeld larches (Larix × marschlinsii), emerged there. It was found that there were several hybrid larch trees in Estonia that sprouted before one of their parent species was introduced in Europe. One of the oldest Dunkeld larches growing in Tallinn is about 210 years old. The radial growth of three Dunkeld larches in Estonia (in the cities of Pärnu and Tallinn and in the manor park of Suure-Kambja) and the determination of their age by cumulative growth graphs are discussed, with consideration given to the available knowledge on the introduction of Japanese larch. The conclusion is that there may have existed earlier alternative introduction routes of Japanese larch into northern Europe via Russia.

17

Dendrochronological studies of Juniperus communis dying out population in the "Jalowce" reserve (Pomerania)

67%

Cedro A., Wrobel M., Jurzyk S.

Dendrobiology

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2007

|

tom 58

17-23

The aim of undertaken research was recognition the reasons of dying out the common juniper Juniperus communis L. ssp. communis population in the forest nature reserve “Jałowce” (Pomerania). Applied methods of dendrochronological analysis let to determine the age of juniper-stand in the reserve and describe the influence of climatic conditions on its growth. Obtained results testify to Juniperus communis chronology with signature WIE collected from 17 individual sequences which numbered 102 tree ring width and represented a time span 1903 to 2004. Such results described the juniper-stand in the reserve as ageing population with the oldest specimen at age 98 years. However, the last several years were characterised by the lack of strong growth depressions typical for earlier time periods with tree ring width ranged 0.7–1.0 mm (themean annual tree ring width amounted to 0.85 mm), but the visible symptoms of degeneration and dying out of protected common juniper population intensified probably because of its age.

18

Dendroecological differences between Taxus baccata males and females in comparison with monoecious Abies alba

67%

Iszkulo G., Jasinska A. K., Sobierajska K.

Dendrobiology

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2011

|

tom 65

Taxus baccata L. is a rare and endangered dioecious species in Europe. Species of this mating system are considered to be the most vulnerable to extinction. It is believed that one reason for this state may be the uneven reproductive effort and different habitat requirements of the two sexes. Silver fir and European yew have very similar ecological requirements, but fir is a monoecious species. The aim of this study was to compare the growth rate andthe effect of precipitation andtemperature on the annual tree-ring width of silver fir and both sexes of European yew. The study site was the Knyazhdvir reserve in western Ukraine, located near the limit of the geographical range of both species. Knyazhdvir reserve is the site of one of the last yew populations in Europe with a large number of individuals (about 15,000 individuals above 1.3 m height) growing alongside fir.Woodsamples were taken from 15 male and15 female specimens of T. baccata andfrom 15 specimens of A. alba and were subjected to a standard dendrochronological procedure. The results showed high positive correlation between the temperatures in February andMarch andthe tree-ring width in the studied species and genders. The response of annual tree-ring width to the examined climatic factors was relatively similar in yew andfir. However slight differences were foundbetween males andfemales of T. baccata. The growth rate decreased more rapidly in females compared to males, probably following sexual maturation. Precipitation in April hada positive effect on firs andfemale yews, but not on male yews. This confirms earlier reports of the requirement of female specimens of dioecious species for a higher humidity than male individuals.

19

The dendrochronological monitoring of the Western Beskid Mountains (Southern Poland) on the basis of radial increments of Norway spruce (Picea abies (L.) Karst.)

67%

Wilczynski S., Feliksik E.

Electronic Journal of Polish Agricultural Universities. Series: Forestry

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2004

|

tom 07

|

nr 2

20

Tree rings as indicators of environmental change

67%

Feliksik E., Wilczynski S.

Electronic Journal of Polish Agricultural Universities. Series: Forestry

|

2003

|

tom 06

|

nr 2

Ograniczanie wyników

Dendroclimatic regions of Douglas fir Pseudotsuga menziesii (Mirb.) Franco in western and northern Poland

A 434-year tree-ring chronology of spruce (Picea abies) with indications of Estonian precipitation

Automation of annual tree increment measurement using vision system

Extremely narrow and wide tree rings in the Norway spruce (Picea abies (L.) Karst.) of the Białowieza National Park

Climate and growth of Podocarpus salignus in Valdivia, Chile

Success of wild pear Pyrus pyraster (L.) Burgsd. in colonization of steep sunny slopes: an interdisciplinary study in the Bielinek Reserve (NW Poland)

Dependence of Scots pine tree-rings on climatic conditions in Southern Poland (Carpatian Mts.)

Developing frameworks for studies on sedimentary fluxes and budgets in changing cold environments

Dendrochronological pine scale [1622-1996 AD] for the Malopolska Area [South Poland]

The effect of air temperature and precipitation on the size of annual growth rings a wild-growing form of the elderberry [Sambucus nigra L.] in the Swietokrzyski National Park

A method to set up the phases of the tree growth in thickness based on dendrochronology of an English oak

Review and evaluation of methods applied for tree dating

Teleconnection of 23 modern chronologies of Quercus robur and Q. petraea from Poland

Tree ring chronologies of scots pine (Pinus sylvestris L.), black pine (P. nigra Arnold), and black alder (Alnus glutinosa (L.) Gaertn.) from the Slowinski National Park and neighbouring forests

Dendroecological characterization of douglas fir (Pseudotsuga menziesii Franco) in the Wielkopolska Region

The Dunkeld larch (Larix x marschlinsii Coaz) in Estonia

Dendrochronological studies of Juniperus communis dying out population in the "Jalowce" reserve (Pomerania)

Dendroecological differences between Taxus baccata males and females in comparison with monoecious Abies alba

The dendrochronological monitoring of the Western Beskid Mountains (Southern Poland) on the basis of radial increments of Norway spruce (Picea abies (L.) Karst.)

Tree rings as indicators of environmental change