Prescribed Burning and Clear-Cutting Effects on Understory Vegetation in a Pinus canariensis Stand (Gran Canaria)

Table 5

Cutting and burning effects on species composition in Pinus canariensis forest stand (Gran Canaria, Canary Islands). Results of the SIMPER procedure conducted to discriminate those taxa that primarily contribute to average dissimilarity between treatments. The species which contribute most to the differences between treatments, using a cut-off cumulative percentage of 90%, are listed. Average dissimilarity: control versus cut = 72.35, control versus burnt = 61.52, and cut versus burnt = 72.06. Av. Abund.: average abundance of taxa based on a scale of 1 to 9 (1: trace; 2: <1%; 3: 1-2%; 4: 2–5%; 5: 5–10%; 6: 10–25%; 7: 25–50%; 8: 50–75%; 9: >75%) [31]; Av. Diss.: average dissimilarity between treatments of taxa; Diss./SD: mean dissimilarity to standard deviation ratio of taxa; Contrib. %: contribution percentage of the taxa to the dissimilarity; Cum. %: cumulative percentage of the contribution to the dissimilarity.

Species	Control	Cut	Av. Diss.	Diss./SD	Contrib. %	Cum. %
	Av. Abund.	Av. Abund.
Teline microphylla (DC.) P. E. Gibbs & Dingwall	6.25	1.64	8.95	1.61	12.37	12.37
Sonchus acaulis Dum. Cours.	2.75	0.89	4.00	1.34	5.53	17.90
Erysimum bicolor (Hornem.) DC.	2.67	1.22	3.76	1.20	5.20	23.10
Ranunculus cortusifolius Willd.	2.42	1.00	3.72	1.35	5.14	28.24
Todaroa montana Webb ex Christ	2.08	0.92	3.30	1.10	4.56	32.80
Sonchus oleraceus L.	1.83	0.69	2.55	1.37	3.52	36.33
Salvia canariensis L.	1.08	0.22	2.44	0.71	3.38	39.71
Chamaecytisus proliferus (L. f.) Link	0.67	0.72	2.43	0.56	3.36	43.07
Micromeria benthamii Webb & Berthel.	0.17	1.42	2.38	1.14	3.28	46.35
Galium aparine L.	1.33	0.83	2.10	1.02	2.91	49.26
Artemisia thuscula Cav.	1.25	0.06	2.10	1.02	2.90	52.16
Ferula linkii Webb	1.17	0.06	2.06	0.91	2.85	55.01
Silene vulgaris (Moench) Garcke	2.08	1.53	1.94	0.87	2.69	57.69
Argyranthemum adauctum (Link) Humphries	1.00	0.75	1.92	1.01	2.66	60.35
Hirschfeldia incana (L.) Lagr.-Foss.	1.00	0.67	1.74	1.13	2.40	62.76
Stellaria media (L.) Vill.	0.83	0.64	1.62	0.94	2.25	65.00
Echium onosmifolium Webb	0.75	0.36	1.56	0.75	2.15	67.15
Andryala pinnatifida Aiton	0.75	0.56	1.48	0.91	2.05	69.20
Vicia disperma DC.	0.33	0.61	1.45	0.71	2.01	71.21
Lathyrus annuus L.	0.33	0.69	1.22	0.96	1.69	72.90
Pericallis webbii Sch. Bip. & Bolle	0.67	0.11	1.18	0.77	1.63	74.53
Umbilicus gaditanus Boiss.	0.67	0.19	1.17	0.73	1.61	76.14
Adenocarpus foliolosus (Aiton) DC.	0.00	0.69	1.14	0.45	1.58	77.73
Asterolinon linum-stellatum (L.) Duby	0.50	0.31	1.09	0.76	1.51	79.24
Papaver rhoeas L.	0.58	0.14	1.04	0.81	1.44	80.68
Centranthus calcitrapae (L.) Dufr.	0.33	0.36	1.01	0.57	1.40	82.08
Rumex bucephalophorus L.	0.25	0.56	0.94	0.63	1.30	83.38
Hypochaeris glabra L.	0.25	0.39	0.89	0.60	1.23	84.60
Carduus pycnocephalus L.	0.08	0.47	0.70	0.59	0.97	85.57
Aeonium percarneum (R. P. Murray) Pit.	0.33	0.19	0.69	0.60	0.96	86.53
Trifolium scabrum L.	0.25	0.28	0.67	0.56	0.92	87.45
Aeonium simsii (Sweet) Stearn	0.42	0.00	0.66	0.53	0.91	88.37
Galium parisiense L.	0.33	0.08	0.64	0.47	0.89	89.26
Neotinea maculata (Desf.) Stearn	0.17	0.19	0.63	0.44	0.87	90.13
Species	Control	Burnt	Av. Diss.	Diss./SD	Contrib. %	Cum. %
	Av. Abund.	Av. Abund.
Teline microphylla (DC.) P. E. Gibbs & Dingwall	6.25	2.11	6.75	1.75	10.98	10.98
Todaroa montana Webb ex Christ	2.08	0.94	3.08	1.17	5.01	15.99
Sonchus acaulis Dum. Cours.	2.75	1.56	3.01	1.26	4.90	20.89
Ranunculus cortusifolius Willd.	2.42	1.42	2.73	1.27	4.44	25.33
Erysimum bicolor (Hornem.) DC.	2.67	1.58	2.43	1.12	3.95	29.28
Echium onosmifolium Webb	0.75	1.39	2.18	0.88	3.55	32.83
Chamaecytisus proliferus (L. f.) Link	0.67	0.86	2.09	0.71	3.40	36.23
Salvia canariensis L.	1.08	0.33	2.09	0.71	3.40	39.62
Ferula linkii Webb	1.17	0.69	1.99	0.95	3.23	42.85
Artemisia thuscula Cav.	1.25	0.50	1.83	1.06	2.97	45.83
Galium aparine L.	1.33	0.78	1.77	1.11	2.87	48.70
Hirschfeldia incana (L.) Lagr.-Foss.	1.00	1.39	1.74	1.16	2.83	51.53
Argyranthemum adauctum (Link) Humphries	1.00	0.75	1.56	0.95	2.54	54.07
Andryala pinnatifida Aiton	0.75	0.78	1.41	0.98	2.29	56.36
Stellaria media (L.) Vill.	0.83	0.56	1.39	0.98	2.25	58.62
Lathyrus annuus L.	0.33	0.92	1.37	1.07	2.23	60.85
Sonchus oleraceus L.	1.83	1.25	1.31	0.93	2.12	62.97
Centranthus calcitrapae (L.) Dufr.	0.33	0.69	1.22	0.78	1.98	64.95
Papaver rhoeas L.	0.58	0.64	1.22	0.99	1.98	66.93
Silene vulgaris (Moench) Garcke	2.08	2.00	1.18	0.80	1.92	68.85
Umbilicus gaditanus Boiss.	0.67	0.44	1.18	0.79	1.92	70.76
Galium parisiense L.	0.33	0.67	1.07	0.76	1.75	72.51
Pericallis webbii Sch. Bip. & Bolle	0.67	0.03	1.00	0.76	1.63	74.14
Carduus pycnocephalus L.	0.08	0.72	0.95	0.71	1.55	75.69
Vicia disperma DC.	0.33	0.44	0.95	0.64	1.55	77.24
Micromeria benthamii Webb & Berthel.	0.17	0.44	0.84	0.55	1.36	78.60
Asterolinon linum-stellatum (L.) Duby	0.50	0.06	0.83	0.67	1.36	79.96
Stachys arvensis (L.) L.	0.00	0.53	0.81	0.59	1.31	81.27
Trifolium scabrum L.	0.25	0.42	0.73	0.66	1.18	82.45
Aeonium simsii (Sweet) Stearn	0.42	0.22	0.72	0.63	1.17	83.62
Hypochaeris glabra L.	0.25	0.19	0.62	0.55	1.01	84.64
Vicia lutea L.	0.17	0.33	0.58	0.51	0.94	85.58
Rumex bucephalophorus L.	0.25	0.22	0.56	0.51	0.90	86.48
Aeonium percarneum (R. P. Murray) Pit.	0.33	0.11	0.55	0.57	0.89	87.37
Trifolium campestre Schreb. in Sturm	0.08	0.36	0.54	0.55	0.88	88.25
Geranium rotundifolium L.	0.00	0.39	0.48	0.56	0.77	89.02
Erica arborea L.	0.00	0.31	0.47	0.33	0.77	89.79
Lactuca serriola L.	0.00	0.39	0.47	0.50	0.76	90.55
Species	Cut	Burnt	Av. Diss.	Diss./SD	Contrib. %	Cum. %
	Av. Abund.	Av. Abund.
Erysimum bicolor (Hornem.) DC.	1.22	1.58	3.41	0.97	4.73	4.73
Sonchus acaulis Dum. Cours.	0.89	1.56	3.18	0.87	4.41	9.14
Ranunculus cortusifolius Willd.	1.00	1.42	2.96	1.00	4.10	13.25
Micromeria benthamii Webb & Berthel.	1.42	0.44	2.88	0.91	4.00	17.25
Todaroa montana Webb ex Christ	0.92	0.94	2.70	0.76	3.75	21.00
Hirschfeldia incana (L.) Lagr.-Foss.	0.67	1.39	2.70	1.00	3.75	24.75
Chamaecytisus proliferus (L. f.) Link	0.72	0.86	2.55	0.76	3.54	28.28
Echium onosmifolium Webb	0.36	1.39	2.49	0.74	3.45	31.73
Sonchus oleraceus L.	0.69	1.25	2.47	1.03	3.43	35.16
Silene vulgaris (Moench) Garcke	1.53	2.00	2.47	0.76	3.43	38.59
Teline microphylla (DC.) P. E. Gibbs & Dingwall	1.64	2.11	2.36	0.77	3.27	41.86
Lathyrus annuus L.	0.69	0.92	2.13	0.90	2.95	44.82
Vicia disperma DC.	0.61	0.44	1.97	0.64	2.74	47.55
Galium aparine L.	0.83	0.78	1.95	0.89	2.70	50.26
Argyranthemum adauctum (Link) Humphries	0.75	0.75	1.73	0.88	2.40	52.66
Andryala pinnatifida Aiton	0.56	0.78	1.67	0.87	2.32	54.98
Centranthus calcitrapae (L.) Dufr.	0.36	0.69	1.55	0.75	2.16	57.14
Stellaria media (L.) Vill.	0.64	0.56	1.55	0.81	2.15	59.28
Carduus pycnocephalus L.	0.47	0.72	1.50	0.74	2.09	61.37
Adenocarpus foliolosus (Aiton) DC.	0.69	0.00	1.40	0.42	1.94	63.31
Ferula linkii Webb	0.06	0.69	1.37	0.46	1.90	65.21
Stachys arvensis (L.) L.	0.22	0.53	1.37	0.58	1.89	67.11
Papaver rhoeas L.	0.14	0.64	1.20	0.66	1.67	68.78
Galium parisiense L.	0.08	0.67	1.19	0.63	1.65	70.43
Geranium rotundifolium L.	0.19	0.39	1.04	0.54	1.44	71.87
Trifolium scabrum L.	0.28	0.42	0.98	0.56	1.36	73.23
Hypochaeris glabra L.	0.39	0.19	0.97	0.56	1.35	74.58
Rumex bucephalophorus L.	0.56	0.22	0.92	0.59	1.28	75.86
Umbilicus gaditanus Boiss.	0.19	0.44	0.90	0.56	1.25	77.11
Salvia canariensis L.	0.22	0.33	0.89	0.46	1.23	78.34
Artemisia thuscula Cav.	0.06	0.50	0.84	0.60	1.16	79.50
Lactuca serriola L.	0.11	0.39	0.78	0.53	1.08	80.57
Trifolium campestre Schreb. in Sturm	0.08	0.36	0.76	0.47	1.06	81.63
Erodium cicutarium (L.) L’Hér. in Aiton	0.36	0.22	0.68	0.55	0.94	82.57
Silene gallica L.	0.25	0.36	0.67	0.57	0.93	83.50
Erica arborea L.	0.00	0.31	0.67	0.32	0.92	84.42
Vicia lutea L.	0.06	0.33	0.63	0.41	0.87	85.29
Hypericum reflexum L. f.	0.22	0.00	0.54	0.33	0.75	86.04
Asterolinon linum-stellatum (L.) Duby	0.31	0.06	0.53	0.44	0.74	86.79
Pterocephalus dumetorus (Brouss. ex Willd.) Coult.	0.17	0.03	0.49	0.39	0.68	87.47
Cerastium glomeratum Thuill.	0.14	0.22	0.49	0.41	0.68	88.15
Neotinea maculata (Desf.) Stearn	0.19	0.00	0.48	0.32	0.66	88.81
Lamium amplexicaule L.	0.06	0.28	0.44	0.38	0.61	89.42
Oxalis pes-caprae L.	0.00	0.17	0.37	0.28	0.52	89.94
Solanum nigrum L.	0.06	0.14	0.36	0.31	0.50	90.44