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Influence of microhabitat in the natural Influence of microhabitat in the natural regeneration of regeneration of Quercus petraea Quercus petraea in restored in restored
coal mines (Northern Palencia, Spain)coal mines (Northern Palencia, Spain) PALOMA TORROBA 1, Mª Pilar Zaldívar García2, Mª Belén Fernández-Santos3 & Carolina Martínez-Ruiz1,4
1Area of Ecology, Department of Agro-Forestry Sciences, University of Valladolid, Spain. E-mail: [email protected] of Botany, Department of Agro-Forestry Sciences, University of Valladolid, Spain3Area of Ecology, Faculty of Biological Sciences, University of Salamanca, Spain 4Sustainable Forest Management Research Institute UVa-INIA (Spain)
Objective Methods
Characterize the natural regeneration of sessile oak (Quercus petraea) in three microhabitats present in a reclaimed coal mine of Northern Palencia.
It is possible to detect differences in seedling characteristics among microhabitats
Results
Conclusions
12th EEF Congress. Avila 2011
Nº de Comunicación Póster: 57
Área de EstudioÁrea de EstudioStudy areaÁrea de EstudioÁrea de EstudioStudy area
12 m12 m 6 m6 m 8 m8 m
5.7 % 5.7 % 61.0 %61.0 %
Edge widthEdge width
Environmental gradientEnvironmental gradient
% shrub cover/plot % shrub cover/plot 70.0 %70.0 %
B M1 M2
20 plots/microhabitatCollected data: morphological parameters presence of moss shrub protectionProblems of hydric stress because of climate and soil characteristics
B M1 M2
m icrohabitat
0
2
4
6
8
10
12
14
16
18
20
22
de
ns
ity
(in
d/m
2 )
Density (ind./m2)Density (ind./m2)
a
bc
Wald st.=256.97; gl=2; p<0.0001; ANOVA based on Poisson
S.E. 20)(n X
B M 1 M 2
m icrohabitat
0,15
0,20
0,25
0,30
0,35
0,40
0,45
0,50
0,55
0,60
1-y
ea
r-o
ld s
ee
dlin
g d
en
sit
y (
ind
./m2 )
1 year old 2-3 years old >3 years oldB M 1 M 2
microhabitat
0
20
40
60
80
100
% s
eed
ling
s
Age structureAge structure
χ2=65.47; gl=4; p<0.0001; Chi-square testF(2, 57) = 0.47; p = 0.629; ANOVA
1-year-old seedling density1-year-old seedling density
B (n=1307 ind.)M1 (n=248)M2 (n=60)
B (n=20 plots)M1 (n= 20)M2 (n=20)
Environmental conditions limits seedling survival
B M 1 M 2m icrohabitat
0
2
4
6
8
10
12
14
16
18
hei
gh
t (c
m)
a
a
b
B M 1 M 2m icrohabitat
0,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
dia
mete
r (m
m)
ab
a
b
Height (cm)Height (cm)
H=37.07; gl=2; p<0.0001; Kruskal-Wallis test
H=7.98; gl=2; p=0.0185; Kruskal-Wallis test
Diameter (mm)Diameter (mm)
± S.E.B (n=1307 ind.)M1 (n=248)M2 (n=60)
X
M1: Higher size and Pearson´s coefficient (r).Maybe because of higher light level and forest influence
Age and shrub protection influence branch mortality
H=40.99; gl=2; p<0.0001; Kruskal-Wallis test
B M 1 M 2
m icrohabitat
0
10
20
30
40
50
% d
ead
bra
nch
es
± S.E.B (n=1307 ind.)M1 (n=248)M2 (n=60)
a
c
b
X
Shrub protection B M1 M2Kruskal-
Wallis test
Average angle (º) 3.3 147.7 241.7 p<0.0001
Average% shrub cover
11.7 72.9 83.1 p<0.0001
% dead branches% dead branches
Shrub protection
High presence of one-year-old seedlings in M2
Hydric stress is more dangerous than herbivory
B M 1 M 2
microhabitat
0
10
20
30
40
50
60
70
% p
rese
nce
of
mo
ss
a
a
b
% moss presence per plot% moss presence per plot
(n=20) ± S.E.XH=17.82; gl=2; p=0.0001; Kruskal-Wallis test
+ seedling density
When environmental conditions are worse, seedling are placed where shrub protection and moisture (moss is its sign) are higher.
Sou th asp e ct No rth asp e ct
asp e ct
0
5
10
15
20
25
30
35
40
45
dens
ity
(ind
/m2
)
Density (ind./m2)Density (ind./m2)
a
b
U=6.00; gl= p=0.003; Mann-Whitney U test
± S.E.North aspect (n=14)South aspect (n=6)
X
Aspect influences seedling survival and growing up in forest microhabitat
South aspect N orth aspect
aspect
0,0
0,5
1,0
1,5
2,0
2,5
3,0
dia
me
ter
(mm
)
South aspect North aspect
aspect
0
2
4
6
8
10
12
14
hei
gh
t (c
m)
a
b
Height (cm)Height (cm)
t=-12.70; gl=1303; p<0.0001 t=-7.51; gl=1304; p<0.0001
ab
Diameter (mm)Diameter (mm)
North aspect (n=509 ind.)
South aspect (n=798)
t-Student test
± S.E.X
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