Wyniki wyszukiwania

1

A boreal-temperate transect in Europe: history of pine stands reconstructed from the radial growth of trees

100%

Parn H.

Polish Journal of Ecology

|

2003

|

tom 51

|

nr 4

History of the Scots pine sites along the Finland-Poland boreal-temperate transect along 25°E longitude, ranging from 50°N-70°N latitude (see Fig. 1 in Breymeyer 2003) was reconstructed using tree-rings. The correlation between the tree-ring index chronologies for the sites was studied. The age of trees at particular sites varies in the range from 66 to 178 years. The youngest trees are growing at the sites FN3 and PL3, the eldest at FN1. At the sites FN1 and PL1, two groups of trees of different age were separated. Correlation analysis revealed significant correlation among the Baltic chronologies. High correlation coefficients were also found between the PL2 site chronology and all the Baltic state chronologies. No positive correlation was detected among the chronologies from the sites in Finland and in Poland.

2

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

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

84%

Laanelaid A., Helama S., Eckstein D.

Dendrobiology

|

2015

|

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

|

2016

|

tom 59

|

nr 196

4

Oak (Quercus spp.) response to climate differs more among sites than among species in central Czech Republic

84%

Rybnicek M., Cermak P., Prokop O., Zid T., Trnka M., Kolar T.

Dendrobiology

|

2016

|

tom 75

Climatic parameters are the main environmental factors affecting tree growth. The main aim of the presented study was to determine whether different oak species growing under contrasting environmental conditions show different sensitivity to climatic parameters. Four oak stands with Quercus robur, Quercus petraea, Quercus polycarpa and Quercus dalechampii growing in the same area were evaluated. Standard dendrochronological methods were used for sample preparation, ring width measurements, cross-dating, chronology development, and the assessment of growth-climate response patterns. Although the species grew under different environmental conditions, their local tree-ring chronologies are highly correlated. The radial growth responses to climatic parameters differ slightly, but the response depends more on local site conditions than on the oak species. At the same time, the strongest correlations between radial growth and climatic parameters were identical among species and sites. The amount of water available in the soil was the main climate-dependent factor limiting radial growth. Approximately since the 1990s, the distribution of rainfalls within the growing season has changed at the expense of spring precipitation. The significance of relative soil moisture content during spring for oak growth increased and the significance of summer values decreased.

5

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

|

2008

|

tom 09

6

Possibility of identification of negative extreme climatic events using Pinus sylvestris tree-rings in Transdanubia, Hungary

84%

Misi D., Nafradi K.

Dendrobiology

|

2016

|

tom 75

Negative climatic extremes occur more frequently in the last decades. Since the Carpathian Basin is highly concerned in their impacts it is important to investigate prior events and estimate the response of the environment to them to get useful information for the future. In our work we selected a stand which is seriously affected by unfavorable summer conditions to examine what kind of fingerprint the negative extreme events have left. We investigated narrow rings and intra-annual density fluctuation to describe years with extreme events. Their stabilized frequency was tested against climatic and groundwater data, as well as against aridity index to determine climate-growth relationships using Pearson and Spearman’s correlations. Our results show positive significant correspondence between summer precipitation and treering growth together with negative connection with summer temperature. The Spearman’s correlation between stabilized frequency of intra-annual density fluctuations, narrow rings and climate data ended with significant relationship in summer. According to the comparison of intra-annual density fluctuation and narrow ring data with drought periods it can be said that narrow rings are better tool for the examination of negative extreme events in summer.

7

Growth of Populus tremula on CO2-enriched soil at a natural mofette site

84%

Vejpustkova M., Thomalla A., Cihak T., Lomsky B., Pfanz H.

Dendrobiology

|

2016

|

tom 75

The main objective of the study was to evaluate inter-annual ring-width variation and cumulative growth of aspen (Populus tremula L.) trees growing on the spots of different soil CO2 concentration at natural mofette site. We hypothesized that growth rate of trees is affected by CO2 concentration within their rooting zone. The study site was situated in the flood plain of Plesná stream near Hartoušov (Western Bohemia). Trees growing in a pure aspen stand were selected according to the CO2-gas regime within their rooting zone. Five high [CO2] trees (10–25% CO2 in the soil) and five low [CO2] trees (up to 3% CO2 in the soil) were sampled. Stem growth analysis of each trunk was carried out to study growth pattern in detail. High and low [CO2] trees significantly differed in a growth rate. At the age of 25 years, the basal area of high [CO2] trees exceeded low [CO2] trees by 39 %. The positive effect of CO2 on annual increment was pronounced particularly in the years with optimal growing conditions. Results suggest that trees can be fertilized not only by elevated atmospheric CO2 but also when fed with CO2 via the roots.

8

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

|

2002

|

tom 05

|

nr 2

9

Growth responses of Picea abies to climate in the central part of the Ceskomoravska Upland (Czech Republic)

67%

Rybnicek M., Cermak P., Zid T., Kolar T.

Dendrobiology

|

2012

|

tom 68

The aims of the study were to determine the effect of temperatures and precipitation on the ring width and to compare the results with the results of previous studies conducted in other mountain ranges of the Czech Republic. The research was performed in the central part of the Ceskomoravská Upland in the vicinity of Herálec municipality in selected 70- up to 110-year-old spruce stands at altitudes from 680ma.s.l. to 779 m a.s.l. Measuring of tree-ring widths and synchronization of individual ring series were conducted in PAST4. The age trend was removed by ARSTAN and climatic effects were modelled in DendroClim2002. The correlation of tree-ring width with monthly precipitation is positive and statistically significant for July of the previous year and for the entire summer period from June to September of the current year. The correlation of tree-ring width with mean monthly temperatures is negative and statistically significant for July and September and positive and statistically significant for October of the previous year. Negative correlation was also found for temperatures of the entire summer period from June to September of the previous year. The regional tree-ring chronology mainly shows two periods of highly reduced increment: from 1992 to 1996 and from 2003 to the end of the analysed period. The results thus confirm the hypothesis that the tree-ring width is in positive correlation with summer precipitation and negative correlation with summer temperatures. Also the results of the habitual diagnostics have shown a relatively low degree of crown transformation which indicates a weak or short-term stress load.

10

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

|

2007

|

tom 06

|

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.

11

Dendrometric and dendroclimatological analyses of black locust

67%

Feliksik E., Orzel S., Wilczynski S.

Electronic Journal of Polish Agricultural Universities. Series: Forestry

|

2007

|

tom 10

|

nr 2

12

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

13

Radial growth response of Scots pine [Pinus sylvestris L.], black pine [Pinus nigra Arnold], and black alder [Alnus glutinosa [L.] Gaertn.] to the nun moth [Lymantria monacha L.] outbreak in the Slowinski National Park and the Damnica Forest District [Northern Poland]

67%

Bednarz B., Kochanowski D.

Electronic Journal of Polish Agricultural Universities. Series: Forestry

|

2010

|

tom 13

|

nr 2

14

Air temperature, precipitation, and sunshine - the factors deciding on the activity of cucumbertree [Magnolia acuminata L.] vascular cambium

67%

Wilczynski S., Podlaski R.

Electronic Journal of Polish Agricultural Universities. Series: Horticulture

|

2007

|

tom 10

|

nr 1

Ograniczanie wyników

A boreal-temperate transect in Europe: history of pine stands reconstructed from the radial growth of trees

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

Automation of annual tree increment measurement using vision system

Oak (Quercus spp.) response to climate differs more among sites than among species in central Czech Republic

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

Possibility of identification of negative extreme climatic events using Pinus sylvestris tree-rings in Transdanubia, Hungary

Growth of Populus tremula on CO2-enriched soil at a natural mofette site

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

Growth responses of Picea abies to climate in the central part of the Ceskomoravska Upland (Czech Republic)

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

Dendrometric and dendroclimatological analyses of black locust

Tree rings as indicators of environmental change

Radial growth response of Scots pine [Pinus sylvestris L.], black pine [Pinus nigra Arnold], and black alder [Alnus glutinosa [L.] Gaertn.] to the nun moth [Lymantria monacha L.] outbreak in the Slowinski National Park and the Damnica Forest District [Northern Poland]

Air temperature, precipitation, and sunshine - the factors deciding on the activity of cucumbertree [Magnolia acuminata L.] vascular cambium