Ecological Processes

Table 1 IndVal-significant species in three habitats of the studied area, Eastern Chaco District, Argentina

From: Exclusion of tourist species from assemblages in ecological studies: a methodological approach using spiders

Adults + juveniles					Adults
Foliage group (17 species)					Foliage group (11 species)
Species	Indval	p	A	B	Species	Indval	p	A	B
Philira micans	0.530	0.001	0.99	0.28	Philira micans	0.337	0.001	0.97	0.12
Scopocira histrio	0.444	0.001	0.99	0.20	Scopocira histrio	0.250	0.001	1,00	0,06
Colonus germaini	0.393	0.001	1.00	0.15	Colonus germaini	0.129	0.031	1.00	0.02
Maeota dichrura	0.371	0.001	1.00	0.14	Maeota dichrura	0.129	0.036	1.00	0.02
Chira spinosa	0.350	0.001	0.89	0.14	Chira spinosa	0.196	0.004	0.76	0.05
Arachnomura querandi	0.303	0.001	1.00	0.09	Arachnomura querandi	0.258	0.001	1.00	0.07
Gypogyna forceps	0.303	0.001	1.00	0.09	Gypogyna forceps	0.194	0.001	1.00	0.04
Chira gouneillei	0.252	0.001	0.89	0.07	Chira gouneillei	0.144	0.013	1.00	0.02
Bryantella smaragda	0.242	0.001	1.00	0.06	–
Titanattus parvus	0.233	0.001	1.00	0.05	Titanattus parvus	0.183	0.001	1.00	0.03
Wedoquella macrothecata	0.224	0.001	1.00	0.05	–
“Coryphasia” sp.n	0.197	0.001	0.93	0.04	–
Cotinusa vittata	0.171	0.001	1.00	0.03	Cotinusa vittata	0.158	0.008	1.00	0.02
Cyllodania zoobotanica	0.171	0.004	1.00	0.03
Gastromicans sp.n.1	0.158	0.006	1.00	0.02	Gastromicans sp.n.1	0.158	0.006	1.00	0.02
Scoturius tigris	0.158	0.009	1.00	0.02	–
Frigga quintensis	0.149	0.019	0.89	0.02	–

Leaf litter group (2 species)					Leaf litter group (2 species)
Species	Indval	p	A	B	Species	Indval	p	A	B
Semiopyla viperina	0.570	0.001	1.00	0.32	Semiopyla viperina	0.173	0.005	0.90	0.03
Hisukattus transversalis	0.171	0.002	1.00	0.03	Hisukattus transversalis	0.158	0.006	1.00	0.02

Grassland group (21 species)					Grassland group (14 species)
Species	Indval	p	A	B	Species	Indval	p	A	B
Maeota dorsalis	0.620	0.001	0.99	0.39	Maeota dorsalis	0.399	0.001	0.98	0.16
Pseudofluda capandegui	0.505	0.001	0.97	0.26	Pseudofluda capandegui	0.413	0.001	1.00	0.17
“Euophrys” melanoleuca	0.456	0.001	1.00	0.21	“Euophrys” melanoleuca	0.428	0.001	1.00	0.18
“Dendryphantes” aff. mordax	0.386	0.001	0.97	0.15	“Dendryphantes” aff. mordax	0.242	0.001	1.00	0.06
Akela ruricola	0.334	0.001	0.92	0.12	Akela ruricola	0.281	0.001	1.00	0.08
Pachomius rubrogastrus	0.321	0.001	0.95	0.11	–
Pseudofluda palachiyaxa	0.312	0.001	0.97	0.10	Pseudofluda palachiyaxa	0.144	0.008	1.00	0.02
Tartamura adfectuosa	0.311	0.001	0.97	0.10	Tartamura adfectuosa	0.259	0.001	0.95	0.07
Neonella sp.n.1	0.274	0.001	1.00	0.07	Neonella sp.n.1	0.250	0.001	1.00	0.06
Zygoballus sp.n	0.251	0.001	0.94	0.07	Zygoballus sp.n	0.144	0.014	1.00	0.02
Neonella sp.n.2	0.242	0.001	1.00	0.06	Neonella sp.n.2	0.214	0.001	1.00	0.05
Jollas sp.	0.227	0.001	0.83	0.06	Jollas sp.	0.189	0.005	0.77	0.05
Tapsatella albocastanea	0.224	0.001	1.00	0.05	–
Pachomius areteguazu	0.216	0.001	0.93	0.05	Pachomius areteguazu	0.144	0.011	1.00	0.02
Aillutticus aff. rotundus	0.208	0.001	0.95	0.05	–
Aphirape gamas	0.204	0.001	1.00	0.04	Aphirape gamas	0.129	0.040	1.00	0.02
Aphirape riparia	0.194	0.001	1.00	0.04	–
Cotinusa cf. melanura	0.171	0.001	1.00	0.03	–
Pachomius sp.n	0.171	0.002	1.00	0.03	–
Semyopila? sp.n	0.171	0.003	1.00	0.03	Semyopila? sp. n	0.171	0.002	1.00	0.03
Semiopyla cathaphracta	0.134	0.050	0.86	0.86	–

Leaf litter + Grassland group (1 species)
Species	Indval	p	A	B	Species	Indval	p	A	B
Corythalia conferta	0.196	0.027	0.87	0.04	–

A: specificity component of the Indval index, B: fidelity component of the Indval index, Indval: Indicator Value Index, p: significance value, question mark indicates that the identification of the species in the genus is doubtful (i.e. it may be a new genus), quotated words indicate that the species should be included in another genus

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