Table 2 Mean percent cover (±s.e.) and percentage of contribution to total cover of the most abundant algae found in urchin barrens of Tenerife Island, and mean percent cover by sectors [SE = Southeast, SW = Southwest, N = North]
Taxa | Cover | % Contr. | SE | SW | N |
|---|---|---|---|---|---|
Crustose | Â | Â | Â | Â | Â |
 Thick CCA | 29.65 ± 2.51 | 47.29 | 17.43 ± 3.26 | 24.43 ± 3.86 | 47.10 ± 4.46 |
 Thin CCA | 16.90 ± 1.19 | 26.95 | 22.63 ± 1.55 | 19.08 ± 2.42 | 9.00 ± 1.51 |
 Hydrolithon onkodes | 8.23 ± 1.60 | 13.12 |  |  | 24.68 ± 3.64 |
 Pseudolithoderma adriaticum | 2.74 ± 0.64 | 4.37 | 1.88 ± 0.58 | 5.93 ± 1.74 | 0.43 ± 0.07 |
 Titanoderma polycephalum | 0.17 ± 0.07 | 0.27 |  |  | 0.50 ± 0.21 |
 Peyssonnelia spp. | 0.01 ± 0.008 | 0.01 |  |  | 0.03 ± 0.02 |
Filamentous and small macrophytes | |||||
 Filamentous Ceramiales | 1.13 ± 0.20 | 1.80 | 0.70 ± 0.20 | 0.73 ± 0.15 | 1.98 ± 0.54 |
 Pseudochlorodesmis furcellata | 0.41 ± 0.76 | 0.65 | 0.48 ± 0.18 | 0.35 ± 0.09 | 0.40 ± 0.09 |
 Jania adhaerens | 0.58 ± 0.09 | 0.92 | 0.85 ± 0.21 | 0.58 ± 0.15 | 0.33 ± 0.08 |
 Ernodesmis verticillata | 0.06 ± 0.03 | 0.09 | 0.18 ± 0.08 |  |  |
 Gelidiopsis intricata | 0.05 ± 0.02 | 0.07 | 0.03 ± 0.02 | 0.10 ± 0.06 | 0.03 ± 0.02 |
 Chaetomorpha aerea | 0.02 ± 0.01 | 0.03 | 0.05 ± 0.03 |  |  |
Upright macrophytes | |||||
 Lobophora variegata | 1.98 ± 0.34 | 3.15 | 1.08 ± 0.17 | 0.83 ± 0.22 | 4.03 ± 0.92 |
 Dictyota pfaffii | 0.35 ± 0.83 | 0.55 | 0.15 ± 0.07 | 0.45 ± 0.15 | 0.45 ± 0.18 |
 Dictyota sp. | 0.22 ± 0.04 | 0.35 | 0.30 ± 0.10 | 0.08 ± 0.04 | 0.28 ± 0.08 |
 Sargassum sp. | 0.06 ± 0.02 | 0.09 | 0.13 ± 0.05 |  | 0.05 ± 0.03 |
 Cystoseira compressa | 0.04 ± 0.01 | 0.06 | 0.10 ± 0.04 | 0.03 ± 0.02 |  |
 Padina pavonica | 0.04 ± 0.02 | 0.06 | 0.13 ± 0.06 |  |  |
 Stypopodium zonale | 0.03 ± 0.01 | 0.04 |  |  | 0.08 ± 0.04 |
 Colpomenia sinuosa | 0.02 ± 0.01 | 0.03 | 0.05 ± 0.05 |  |  |
 Liagora tetrasporifera | 0.01 ± 0.008 | 0.01 |  | 0.03 ± 0.02 |  |
 Dictyota fasciola | 0.01 ± 0.008 | 0.01 | 0.03 ± 0.02 |  |  |
 Asparagopsis taxiformis | 0.01 ± 0.008 | 0.01 | 0.03 ± 0.02 |  |  |
Total | 62.69 ± 26.99 |  | 46.18 ± 19.69 | 52.58 ± 25.766 | 89.33 ± 7.71 |