Table 25.1.
Bird community composition in the Avic catchment. Average density (birds 5
ha- I
)
is shown for each plot and two periods of the year: April -
(')
0
September ('Spring') and October- March ('Winter'). Species found present only on one or two occasions in each season are marked with a cross. Phenologi:3
"0
cal status of birds (Phen., see text) is shown by: C (constant species), S (summer visitor), and I (irregular species). Paired samples t-test compares abundance
0
~.
between plots for each season. Correlation coefficient (r) between abundance of each species in both plots is also shown
o·
;l
Plot 1
Plot 2
Paired samples t-test
.,
;l
Species
Scientific name
Phen.
Spring
Winter
Spring
Winter
Spring
Winter
PO
Hoopoe
Upupa epops
'<
I
;l
.,
Wood Pigeon
Columba palumbus
C
0.96
0.33
0.27
0.32
4.18"
0.29
0.078
:3
Cuckoo
Cuculus canorus
I
+
+
n'
'"
Night jar
Caprimulgus europaeus
+
0
...,
Green Woodpecker
Picus viridis
I
+
+
+
&
'"
Great Spoiled Woodpecker
Dendrocopos major
I
+
tJ;l
:::;.
Wren
Troglodytes troglodytes
C
0.31
0.50
0.04
0.00
1.53
2.39
- 0.132
PRobin
Eritllacus rubecula
C
6.81
4.58
7.96
1.18
1.08
5.41'"
0.443'
(')
0
Redstart
Plloenicurus pllOenicurus
I
+
:3
:3
Blackbird
Turdus merula
C
2.31
3.42
1.61
0.68
2.00
4.98'"
0.105
~
;l
Subalpine Warbler
Sylvia cantillalls
S
1.62
0.15
4.
16"
0.294
~.
Garden Warbler
Sylvia borirr
S
0.58
0.27
1.43
0.532"
Sardinian Warbler
Sylvia melanocepllala
I
Blackcap
Sylvia atricapilla
S
0.28
0.04
1.39
-0.072
Chiffchaff
Pllylloscopus collybita
I
+
Bonelli's Warbler
Pllylloscopus borrelli
S
0.62
0.69
0.23
0.486'
Firecrest
Regulus igrricapillus
C
3.92
2.96
4.11
3.77
0.43
1.99
0.443'
Long-tailed Tit
Aegitlralos caudallls
C
1.15
1.79
0.77
0.64
0.75
2.42'
-0.159
Crested Tit
Parus cristatus
I
0. 19
0.00
0.38
0.09
0.79
1.49
-0. 174
BlueTit
Parus caeruleus
C
3.54
1.88
2.65
1.14
2.14
2.41'
0.665'"
Great Tit
Parus major
C
3.81
1.58
2.58
0.86
2.31'
1.72
0.508'
Short-toed Treecreeper
Certlria braclrydactyla
C
1.00
0.79
0.85
0.68
0.65
0.43
0.306
Jay
Garrulus glandarius
C
0.54
0.38
0.96
0.45
1.50
0.27
0.294
Chaffinch
Frillgil/a coelebs
C
3.73
0.75
3.11
0.23
\.92
2.95'
0.918'"
Rock Bunting
Emberiza cia
+
• P<0.05,
•• P <0.0 I,
u,
P <0.00 I.
..."
\J1
\0
Bird community composition in the Avic catchment. Average density (birds 5
ha- I
)
is shown for each plot and two periods of the year: April -
(')
0
September ('Spring') and October- March ('Winter'). Species found present only on one or two occasions in each season are marked with a cross. Phenologi:3
"0
cal status of birds (Phen., see text) is shown by: C (constant species), S (summer visitor), and I (irregular species). Paired samples t-test compares abundance
0
~.
between plots for each season. Correlation coefficient (r) between abundance of each species in both plots is also shown
o·
;l
Plot 1
Plot 2
Paired samples t-test
.,
;l
Species
Scientific name
Phen.
Spring
Winter
Spring
Winter
Spring
Winter
PO
Hoopoe
Upupa epops
'<
I
;l
.,
Wood Pigeon
Columba palumbus
C
0.96
0.33
0.27
0.32
4.18"
0.29
0.078
:3
Cuckoo
Cuculus canorus
I
+
+
n'
'"
Night jar
Caprimulgus europaeus
+
0
...,
Green Woodpecker
Picus viridis
I
+
+
+
&
'"
Great Spoiled Woodpecker
Dendrocopos major
I
+
tJ;l
:::;.
Wren
Troglodytes troglodytes
C
0.31
0.50
0.04
0.00
1.53
2.39
- 0.132
PRobin
Eritllacus rubecula
C
6.81
4.58
7.96
1.18
1.08
5.41'"
0.443'
(')
0
Redstart
Plloenicurus pllOenicurus
I
+
:3
:3
Blackbird
Turdus merula
C
2.31
3.42
1.61
0.68
2.00
4.98'"
0.105
~
;l
Subalpine Warbler
Sylvia cantillalls
S
1.62
0.15
4.
16"
0.294
~.
Garden Warbler
Sylvia borirr
S
0.58
0.27
1.43
0.532"
Sardinian Warbler
Sylvia melanocepllala
I
Blackcap
Sylvia atricapilla
S
0.28
0.04
1.39
-0.072
Chiffchaff
Pllylloscopus collybita
I
+
Bonelli's Warbler
Pllylloscopus borrelli
S
0.62
0.69
0.23
0.486'
Firecrest
Regulus igrricapillus
C
3.92
2.96
4.11
3.77
0.43
1.99
0.443'
Long-tailed Tit
Aegitlralos caudallls
C
1.15
1.79
0.77
0.64
0.75
2.42'
-0.159
Crested Tit
Parus cristatus
I
0. 19
0.00
0.38
0.09
0.79
1.49
-0. 174
BlueTit
Parus caeruleus
C
3.54
1.88
2.65
1.14
2.14
2.41'
0.665'"
Great Tit
Parus major
C
3.81
1.58
2.58
0.86
2.31'
1.72
0.508'
Short-toed Treecreeper
Certlria braclrydactyla
C
1.00
0.79
0.85
0.68
0.65
0.43
0.306
Jay
Garrulus glandarius
C
0.54
0.38
0.96
0.45
1.50
0.27
0.294
Chaffinch
Frillgil/a coelebs
C
3.73
0.75
3.11
0.23
\.92
2.95'
0.918'"
Rock Bunting
Emberiza cia
+
• P<0.05,
•• P <0.0 I,
u,
P <0.00 I.
..."
\J1
\0