Supplementary material
Appendix S1 List of the 10 most common plant species found in the riparian vegetation
patches (A) and adjacent habitats (B) surveyed for the current study classified according
to the vegetation communities provided by Font (2014). All Arundo donax plots were
monospecific, with the exception of a plot in the Vallvidrera stream where
Brachypodium sylvaticum was marginally present.
(A) Riparian vegetation communities
Deciduous forest communities
Alnion incanae
Populion albae
Alnus glutinosa
Arum italicum
Brachypodium sylvaticum Asparagus acutifolius
Carex pendula
Brachypodium sylvaticum
Clematis vitalba
Clematis vitalba
Corylus avellana
Crataegus monogyna
Crataegus monogyna
Fraxinus angustifolia
Geranium robertianum
Hedera helix
Hedera helix
Rubus ulmifolius
Rubus ulmifolius
Ruscus aculeatus
Viola sylvestris
Ulmus minor
Ruderal plant communities
Silybo-Urticion
Bidention tripartitae
Chenopodium album Apium nodiflorum
Convolvulus arvensis Aster squamatus
Galium aparine
Chenopodium album
Hordeum murinum
Lythrum salicaria
Malva sylvestris
Paspalum distichum
Rubus ulmifolius
Polygonum persicaria
Rumex crispus
Rumex palustris
Silybum marianum
Sonchus oleraceus
Sonchus oleraceus
Veronica anagallis-aquatica
Urtica dioica
Xanthium echinatum
(B) Adjacent plant species to the riparian areas
Mediterranean oak forest
(Vallvidrera stream)
Viburno-Quercetum ilicis
Asparagus acutifolius
Asplenium adiantum-nigrum
Hedera helix
Lonicera implexa
Quercus ilex
Rubus ulmifolius
Ruscus aculeatus
Smilax aspera
Viburnum tinus
Viola alba
Highly human-impacted areas (Rivers Ripoll and
Llobregat)
Mixed
Anagallis arvenis
Capsella bursa-pastoris
Chenopodium album
Cynodon dactylon
Capsella bursa-pastoris
Echium vulgare
Foeniculum vulgare
Hordeum murinum
Oryzopsis miliacea
Plantago major
Appendix S2 List of arthropods provided by taxonomical level (class, order and family),
trap method (P=pitfall trap, B=Berlese funnel) and soil layer for Berlese captures (O:
organic layer and M: mineral layer) in the three types of riparian areas (D: deciduous
forest, R: native ruderal plants, A: Arundo donax) surveyed in the three catchments (L:
Llobregat, R: Ripoll, V: Vallvidera) of the north-eastern Spain. Trophic guilds are also
shown for each family.
Cl. Arachnida
O. Araneae
F. Agelenidae
F. Dysderidae
F. Gnaphosidae
F. Lycosidae
F. Salticidae
F. Tetragnathidae
F. Thomisidae
F. Zodariidae
O. Opiliones
F. Phalangiidae
F. Trogulidae
O. Pseudoscorpiones
F. Chthoniidae
Cl. Chilopoda
O. Geophilomorpha
F. Geophiliidae
O. Lithobiomorpha
F. Lithobiidae
Cl. Diplopoda
O. Chordeumatida
F. Craspedosomatidae
O. Glomerida
F. Glomeridae
O. Julida
F. Julidae
O. Polydesmida
F. Polydesmidae
Cl. Insecta
O. Dictyoptera
F. Blattidae
O. Coleoptera
F. Anobiidae
F. Carabidae
F. Coccinellidae
F. Corylophidae
F. Curculiionidae
F. Elateridae
F. Silphidae
F. Staphilinidae
River
Riparian area
Sampling method
Layer
L, R, V
L, R, V
L, R, V
L, R, V
V
R, V
L
L, R
D, A
D, R, A
D, R, A
D, R, A
R
R
R
D, R
P
P, B
P, B
P, B
P
P
B
P
L, V
V
D, A
R
P, B
B
M
O
L, R, V
D, R, A
P, B
O, M
L, R, V
D, R, A
B
O, M
L, V
D, A
P, B
M
L, R, V
D, R, A
P, B
O, M
L, R, V
D, R, A
P, B
O, M
L, R, V
D, R, A
P, B
O, M
L, R, V
D, R, A
P, B
O
L, R, V
D, R, A
P, B
O, M
L, V
L, R, V
L, S
L, R, V
L, R, V
L, R
L, R, V
L,
R, A
D, R, A
D
D, R, A
D, A
D, R, A
D, A
D
B
P, B
P
B
B
B
P
P
O, M
O, M
O
O, M
O, M
M
O, M
O, M
O, M
O. Dermaptera
F. Forficulidae
O. Diptera
F. Muscidae
F. Tachinidae
F. Fanniidae
F. Sciaridae
O. Hemiptera
F. Geocoridae
F. Rhyparochromidae
O. Hymenoptera
F. Braconidae
F. Eupelmidae
F. Formicidae
O. Thysanoptera
F. Phlaeothripidae
Cl. Malacostraca
O. Isopoda
F. Armadillidae
F. Porcellionidae
River
Riparian area
Sampling method
Layer
V
D, A
B
O, M
S, V
S, V
S
S, V
D, A
R
R
R, A
P
P
P
B
O
L
L, S, V
D
D, A
P
P
L, S, V
S
L, S, V
D, R, A
R
D, R, A
P, B
P
P, B
O, M
L, S, V
D, R, A
B
O, M
L, S, V
S
D, R, A
D, A
P, B
P
O, M
O
Appendix S3 Detrended correspondence analyses scores for macro-arthropod taxa
captured either in pitfall traps or the Berlese funnels in the three types of riparian
vegetation in Rivers Llobregat and Ripoll and the Vallvidrera stream.
Agelenidae
Anobiidae
Armadillidae
Blattidae
Braconidae
Carabidae
Chthoniidae
Coccinellidae
Corylophidae
Craspedosomatidae
Curculionidae
Dysderidae
Elateridae
Eupelmidae
Faniidae
Forficulidae
Formicidae
Geocoridae
Geophiliidae
Glomeridae
Gnaphosidae
Julidae
Lithobiidae
Lycosidae
Muscidae
Phalangiidae
Phlaeothripidae
Polydesmidae
Porcellionidae
Rhyparochromidae
Salticidae
Sciaridae
Silphidae
Staphilinidae
Tachinidae
Tetragnathidae
Thomisidae
Trogulidae
Zodariidae
nd = not captured
Pitfall traps
DCA 1
DCA 2
-0.58
-1.48
nd
nd
1.75
-0.22
-0.79
-1.42
-2.12
-0.81
-0.45
-1.16
1.67
1.38
-2.48
-2.09
nd
nd
0.85
1.83
nd
nd
-0.19
1.53
nd
nd
2.54
0.15
-2.53
2.48
nd
nd
0.27
0.32
-2.75
-2.39
nd
nd
-0.83
-0.91
-1.59
-2.17
2.84
0.15
1.78
-0.81
0.91
0.11
1.71
1.00
1.66
-1.05
nd
nd
-0.24
1.71
0.08
-0.04
-1.15
2.04
3.78
0.15
nd
nd
-0.72
1.09
0.79
-1.97
3.78
0.15
-1.79
1.32
1.85
1.22
nd
nd
-1.52
1.19
Berlese funnels
DCA 1
DCA 2
nd
nd
-2.34
3.39
0.27
-0.79
-1.34
-0.99
1.24
-1.09
-0.34
1.21
1.99
-0.24
nd
nd
0.79
-1.41
-2.39
-2.55
0.10
-1.76
-4.00
0.82
-1.27
-1.33
nd
nd
nd
nd
-0.42
2.12
-0.07
0.58
nd
nd
1.48
0.07
0.49
-0.55
1.60
0.26
-0.24
1.27
3.40
0.34
-1.66
0.47
nd
nd
2.12
1.38
-0.96
0.86
2.85
0.99
nd
nd
nd
nd
nd
nd
0.25
1.29
nd
nd
nd
nd
nd
nd
nd
nd
nd
nd
1.91
-0.52
nd
nd
Appendix S4 GLM outputs for abundances of representatives of all families captured in
pitfall traps (A) and Berlese funnels (B) in the three types of vegetation in Rivers
Llobregat and Besòs and the Vallvidrera stream. In all significant treatments (NS = not
significant), P-values are provided and trends in abundance are also shown for A. donax
plots (D = decrease and I = increase).
(A) Pitfall trap captures
Family
Armadillidae
Craspedosomatidae
Faniidae
Glomeridae
Julidae
Polydesmidae
Porcellionidae
Silphidae
Blattidae
Formicidae
Muscidae
Staphilinidae
Braconidae
Eupelmidae
Tachinidae
Rhyparochromidae
Agelenidae
Carabidae
Chthoniidae
Coccinellidae
Dysderidae
Geocoridae
Gnaphosidae
Lithobiidae
Lycosidae
Phalangiidae
Salticidae
Tetragnathidae
Thomisidae
Zodariidae
Trophic guild
Detritivorous
Detritivorous
Detritivorous
Detritivorous
Detritivorous
Detritivorous
Detritivorous
Detritivorous
Omnivorous
Omnivorous
Omnivorous
Omnivorous
Parasitoids
Parasitoids
Parasitoids
Phytophagous
Predators
Predators
Predators
Predators
Predators
Predators
Predators
Predators
Predators
Predators
Predators
Predators
Predators
Predators
See also the next page
River
NS
NS
0.001
0.004
<0.001
NS
NS
<0.001
NS
NS
NS
NS
0.04
NS
NS
NS
NS
0.001
<0.001
NS
NS
NS
0.002
0.02
NS
NS
NS
NS
NS
NS
Vegetation type
NS
NS
0.001
0.01
<0.001
NS
NS
<0.001
NS
0.004
NS
NS
0.02
NS
NS
0.02
NS
0.001
<0.001
NS
NS
NS
0.002
0.02
NS
NS
NS
NS
NS
NS
River x Vegetation type
NS
NS
NS
NS
NS
NS
NS
<0.001
NS
NS
NS
NS
NS
NS
NS
NS
NS
0.001
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
Trend in A. donax plots
NS
NS
D
D
D
NS
NS
D
NS
D
NS
NS
D
NS
NS
D
NS
D
D
NS
NS
NS
NS
D
NS
NS
NS
NS
NS
NS
(B) Berlese funnels captures
Family
Armadillidae
Craspedosomatidae
Forficulidae
Glomeridae
Julidae
Polydesmidae
Corylophidae
Phlaeothripidae
Sciaridae
Blattidae
Formicidae
Braconidae
Anobiidae
Curculionidae
Elateridae
Carabidae
Chthoniidae
Dysderidae
Geophiliidae
Gnaphosidae
Lithobiidae
Lycosidae
Phalangiidae
Trogulidae
Trophic guild River
Detritivorous
NS
Detritivorous <0.001
Detritivorous
NS
Detritivorous
NS
Detritivorous
NS
Detritivorous
0.001
Mycophagous
NS
Mycophagous
NS
Mycophagous
NS
Omnivorous
NS
Omnivorous
NS
Parasitoids
0.004
Phytophagous
NS
Phytophagous
NS
Phytophagous
NS
Predators
NS
Predators
<0.001
Predators
NS
Predators
0.04
Predators
0.01
Predators
NS
Predators
0.001
Predators
NS
Predators
<0.001
Vegetation type River x Vegetation type
NS
NS
NS
<0.001
0.02
NS
0.004
0.01
NS
NS
NS
NS
NS
0.01
0.02
0.05
NS
NS
NS
NS
NS
0.04
NS
0.004
NS
NS
NS
0.01
NS
0.03
NS
0.02
NS
<0.001
NS
0.03
NS
<0.001
NS
NS
NS
NS
0.001
0.003
NS
0.02
NS
<0.001
Trend in A. donax plots
NS
D
I (Only Vallvidrera)
D (Except Llobregat)
NS
NS
D
D
NS
NS
D (Except Vallvidrera)
D
NS
D
D (Except Vallvidrera)
D (Except Vallvidrera)
D
I (Except Llobregat)
D
NS
NS
I/D/NS
D (Only Vallvidrera)
NS
Appendix S5 Spearman rank correlation coefficients between riparian vegetation
attributes and soil properties. The table only contains the pair-wise correlations that
were highly correlated (|rho| ≥ 0.7).
Local native plant richness Leaf litter deposition
Mean herbaceous height
Herbaceous cover
pH
Soil moisture
r=-0.81
r=0.85
r=0.84
r=0.70
r=0.71
P<0.001
P<0.001
P<0.001
P=0.001
P=0.002
Soil porosity
Soil carbon stock
Herbaceous cover
r=0.74
r=-0.70
P<0.001
P<0.001
Soil carbon stock
Leaf litter deposition
Herbaceous cover
r=0.70
r=-0.75
P<0.001
P<0.001