“subalpine tree-ring chronologies from bulgaria – the database of the university of...

“Subalpine tree-ring chronologies from Bulgaria – the database of the

University of Forestry"

“Subalpine tree-ring chronologies from Bulgaria – the database of the

University of Forestry"

Momchil Panayotov, PhDMomchil Panayotov, PhDUniversity of Forestry, Sofia,Dendrology DepartmentUniversity of Forestry, Sofia,Dendrology Department

WSL Institute for Snow and Avalanche Research SLFWSL Institute for Snow and Avalanche Research SLF

M. Panayotov - "Subalpine tree-ring chronologies from Bulgaria… "M. Panayotov - "Subalpine tree-ring chronologies from Bulgaria… "

Topics:

•Forest dynamic studies in Picea abies forests in Rila Mts.

•Picea abies tree-ring chronologies

•“Old and tough” - Pinus peuce and Pinus heldreichii (P. leucodermis) tree ring chronologies

Topics:

•Forest dynamic studies in Picea abies forests in Rila Mts.

•Picea abies tree-ring chronologies

•“Old and tough” - Pinus peuce and Pinus heldreichii (P. leucodermis) tree ring chronologies


Sofia

Velingrad

Vitosha

Rila

Pirin


SLF project (Velux foundation) “Natural dynamics of subalpine avalanche protection forests”


•Would the protection forests in the Alps maintain their Would the protection forests in the Alps maintain their protection functions if they are not managed?protection functions if they are not managed?

•>Natural dynamics in Pristine >Natural dynamics in Pristine Picea abiesPicea abies forests – forests – what is the influence of disturbances, scale, etc…what is the influence of disturbances, scale, etc…

•> A Bulgarian example – Parangalitsa Forest > A Bulgarian example – Parangalitsa Forest Reserve in Rila Mts.Reserve in Rila Mts.



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35

1855 1875 1895 1915 1935 1955 1975 1995

Sam

ple

dep

th

0.4

0.5

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0.9

1

1.1

1.2

1.3

1.4

Ind

ices

number of samples

STD chronology, 67% spline


Expected in terms of “tree-ring chronologies”:

•Picea abies tree-ring chronology from “Optimum growth conditions”

•Picea abies tree-ring chronology from “Subalpine zone”

•Abies alba tree-ring chronology from “Optimum growth conditions”

•Pinus sylvestris chronology?

Expected in terms of “tree-ring chronologies”:

•Picea abies tree-ring chronology from “Optimum growth conditions”

•Picea abies tree-ring chronology from “Subalpine zone”

•Abies alba tree-ring chronology from “Optimum growth conditions”

•Pinus sylvestris chronology?

Picea abies from Vitosha – disturbances and tree ring chronology


1966 aero-photo image 1997 aero-photo image





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60

70

1858 1868 1878 1888 1898 1908 1918 1928 1938 1948 1958 1968 1978 1988 1998

Year

Sam

ple

dep

th

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

Ind

ices

number of samples

STD chron., 67% spline

-80%

-60%

-40%

-20%

0%

20%

40%

60%

80%

1859 1869 1879 1889 1899 1909 1919 1929 1939 1949 1959 1969 1979 1989 1999

Year

0.4

0.6

0.8

1

1.2

1.4

1.6

Cropper values & Index, 20-year splined

% negative Cropper values (<-750)

% Positive Cropper values (>750)

Index_STD-20yrSpline

Panayotov, M., Popa, I., Dimitrov, D., Tsavkov, E. and Yurukov, S., Pointer years in Picea abies and Fagus sylvatica tree-ring chronologies from Bulgaria and Romania. TRACE 2009. In Preparation

Pinus peuce (Macedonian pine) in Pirin mountainsPinus peuce (Macedonian pine) in Pirin mountains


The old forests - Pinus peuce (Macedonian pine) and Pinus heldreichii (=P.leucodermis) (Bosnian pine) in PirinThe old forests - Pinus peuce (Macedonian pine) and Pinus heldreichii (=P.leucodermis) (Bosnian pine) in Pirin

~ 2000 m a.s.l.~ 2000 m a.s.l.

2200-2250 m a.s.l.2200-2250 m a.s.l.

Todorka peak, Pirin Mts. NW SlopeTodorka peak, Pirin Mts. NW Slope


Pinus peuce (Macedonian pine) in Pirin mountainsPinus peuce (Macedonian pine) in Pirin mountains


•Vakarelov I, Mirtchev S, Kachaunova E, Simeonova N (2001) Reconstruction of summer air temperatures by dendrochronological analysis of Macedonian pine (Pinus peuce Griseb.) in Pirin mountains (South-eastern Bulgaria). Forestry Ideas 1-4:16-26

•Panayotov MP, Yurukov S (2007) Tree ring chronology from Pinus peuce in Pirin Mts and the possibilities to use it for climate analysis. Phytologia Balcanica, 13(3): 313-320

Pinus peuce, Pirin, STD chron.

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1

1.1

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1677 1702 1727 1752 1777 1802 1827 1852 1877 1902 1927 1952 1977 2002

temperatures

-0.4

-0.2

0

0.2

0.4

M J J A S O N D J F M A M J J A S O

Month

Co

rrel

atio

n

coef

fici

ent

precipitation

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-0.2

0

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M J J A S O N D J F M A M J J A S O

Month

Cor

rela

tion

coef

ficie

nt

Pinus heldreichii (=P.leucodermis) (Bosnian pine) in PirinPinus heldreichii (=P.leucodermis) (Bosnian pine) in Pirin


Vihren peak, 2917 m a.s.l. Pirin Mts. E slopeVihren peak, 2917 m a.s.l. Pirin Mts. E slope





Pinus heldreichii chronology, Pirin, STD; ver. 271108

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1250 1300 1350 1400 1450 1500 1550 1600 1650 1700 1750 1800 1850 1900 1950 2000

020406080

1250 1300 1350 1400 1450 1500 1550 1600 1650 1700 1750 1800 1850 1900 1950 2000

Number of P. heldreichii coresNumber of P. peuce cores

Panayotov, M., Bebi, P., Trouet, V. and Yurukov, S., Climate signal in tree-ring chronologies of Pinus peuce and Pinus heldreichii from the Pirin Mountains in Bulgaria. Submitted to TREES - Structure and Function

Temperature

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-0.2

0

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M J J A S O N D J F M A M J J A S OMonth

Cor

rela

tion

coef

ficie

nt

Precipitation

-0.4

-0.2

0

0.2

0.4

M J J A S O N D J F M A M J J A S OMonth

Cor

rela

tion

coef

ficie

nt

Thanks for the attentionmore and updates:

http://dendrochronologybg.net

Thanks for the attentionmore and updates:

http://dendrochronologybg.net


“subalpine tree-ring chronologies from bulgaria – the database of the university of...

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