Transcript Results - ForestFires.ba

Impact of fire on chemical
characteristics of
the soil in the Dalmatia
Ivica Kisić; Igor Bogunović; Aleksandra Jurišić
Bihać, 28. 04. 2014
Wildfires in Dalmatia
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Dalmatian region  under biggest risk from fires
Great socio-economic changes lead to increased
number of fires
Croatia (1998-2008): 29100 (31.7%) fires were
recorded in Dalmatia
Bihać, 28. 04. 2014
Bihać, 28. 04. 2014
Bihać, 28. 04. 2014
Bihać, 28. 04. 2014
Bihać, 28. 04. 2014
Objective
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Evaluate effect of wildfire in Mediterranean
flora in comparison to TC, TN, TS, K and P,
and C/N, N/S ratios.
Hypothesize  chemical soil parameters in
Dalmatian natural flora will vary substantially,
and disturbance will lead to marked changes.
Bihać, 28. 04. 2014
Materials and methods
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Location: island Korcula and Peljesac peninsula
(43°02'-42°45' N, 16°37'-17°46' E)
Bihać, 28. 04. 2014
Materials and methods climatic characteristics
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Mediterranean climate  long, dry and hot
summers; winters are mild and humid.
Average annual temp 11.2 0C, min in
January 9.8 0C, max in July 26.9 0C.
Average annual rainfall 1300 mm
Bihać, 28. 04. 2014
Materials and methods - flora:
coniferous trees:
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Aleppo pine (Pinus
halepensis),
pines (Pinus pinea),
Dalmatian black pine (Pinus
nigra),
cypress (Cypressus sp.)
Maki,
Holm oak (Ilex querxus),
and also grows Carob and
Laurel.
Bihać, 28. 04. 2014
Materials and methods – analysis
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Samples in layer 0-5 cm with similar
aspect, slope, elevation and vegetation
characteristics
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pH  electrometric method in KCl suspension
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TN  dry combustion method
Bihać, 28. 04. 2014
Materials and methods
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TC after dry combustion
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TS  by dry combustion
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P2O5 and K2O  extracted by AL solution and
detected by spectrophotometric and flame
photometric
Data observed by ANOVA (Fishers LSD test at P≤
0.05)
Bihać, 28. 04. 2014
Bihać, 28. 04. 2014
Results
Soil pH; Soil layer 0-5 cm
a
8,00
b
a
a
a
7,00
pH
b
7,27
b
6,62
b
6,00
5,00
4,00
Smokvica 2011
Blato 2012
Panjika 2012
Burned
Control
Bihać, 28. 04. 2014
Ponikve 2011
Average
Results
Soil Avaiable P2O5; Soil layer 0-5 cm
a
450
400
350
mg kg -1 soil
300
a
250
210
200
150
a
100
50
b
a
b
b
b
26
0
Smokvica 2011
Blato 2012
Panjika 2012
Bihać,
28. 04. 2014
Burned
Control
Ponikve 2011
Average
Results
Soil Avaiable K2O; Soil layer 0-5 cm
a
1000
900
800
a
700
mg kg-1 soil
737
a
600
500
a
b
b
b
425
400
300
b
200
100
0
Smokvica 2011
Blato 2012
Panjika 2012
Bihać,
28. 04. 2014
Burned
Control
Ponikve 2011
Average
Results
Total Nitrogen (TN); Soil layer 0-5 cm
%
1,000
0,900
a
0,800
a
0,700
b
0,600
0,500
a
a
0,400
b
0,553
a
0,371
0,300
b
0,200
0,100
0,000
Smokvica 2011
Blato 2012
Panjika 2012
Ponikve 2011
Bihać,
28. 04. 2014
Burned
Control
Average
Results
Total Carbon (TC); Soil layer 0-5 cm
%
a
18,00
16,00
b
14,00
12,00
10,00
a
b
a
8,00
10,19
a
b
9,21
b
6,00
4,00
2,00
0,00
Smokvica 2011
Blato 2012
Panjika 2012
Bihać,
28. 04. 2014
Burned
Control
Ponikve 2011
Average
Results
Total Sulfur (TS); Soil layer 0-5 cm
%
0,120
a
0,110
0,100
0,090
0,080
a
a
b
a
0,070
a
0,076 0,074
a
0,060
0,050
b
0,040
0,030
0,020
Smokvica 2011
Blato 2012
Panjika 2012
Bihać,
28. 04. 2014
Burned
Control
Ponikve 2011
Average
Results
C/N and N/S ratio; Soil layer 0-5 cm
87,3
90,0
75,0
C/N
N/S
60,0
45,0
35,8
30,0
23,8
20,2
23,6
20,4 20,2
19,0
11,8 12,0
15,0
9,9
5,5 5,2
4,5 5,2
Smokvica
2011
Blato
2012
8,7
5,2
7,2
3,9
4,9
0,0
Smokvica
2011
Blato
2012
Panjika Ponikve
2012
2011
Average
Burned
Bihać,
28. 04.Control
2014
Panjika Ponikve
2012
2011
Average
Conclusions
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Difference in terms
of soil properties
beetween burned
and control areas
Burned soil samples
recorded higher
values of pH, P, K,
TN and TC.
TS values are
approximately equal
Bihać, 28. 04. 2014
Conclusions
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Burned samples in average contain more
favorable C/N and wider N/S ratio
Caution  low number of samples different
vegetation type and cover erosion signs
require more research
Bihać, 28. 04. 2014
Bihać, 28. 04. 2014
Hvala na pažnji
Bihać, 28. 04. 2014