Table 1 Mean biomass (g dw m−2) values (n = 9) for the different macrophyte species, together with total biomass, total species richness and detritus weight for the two sampling periods and habitats
Species | September 2004 | March 2005 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Hard bottoms | Soft bottoms | Hard bottoms | Soft bottoms | |||||||||||
Alge | C. racemosa | C. racemosa | C. prolifera | C. nodosa | P. oceanica | Sand | Algae | C. racemosa | C. racemosa | C. prolifera | C. nodosa | P. oceanica | Sand | |
Algae | ||||||||||||||
Acetabularia acetabulum (Linnaeus) P.C. Silva | – | – | – | – | – | – | – | – | 0.08 | 0.06 | – | – | – | – |
Alsidium corallinum (cf) C. Agardh | – | – | – | – | – | – | – | – | 0.29 | – | – | – | – | |
Caulerpa prolifera (Forsskål) J.V. Lamouroux | 2.23 | 19.4 | 10.07 | 335.47 | 0.82 | – | – | – | 0.01 | 4.34 | 250.07 | 3.01 | – | – |
Caulerpa racemosa (Forsskål) J. Agardh | – | 259.49 | 122.24 | – | 0.69 | – | – | – | 68.91 | 42.49 | – | – | – | – |
Ceramium spp. (Hudson) C.A. Agardh | 0.11 | – | – | – | – | – | – | 10.72 | – | – | – | – | – | |
Cladophora sp. Kützing, 1843 | 0.3 | – | 1.02 | – | 0.11 | – | – | 54.38 | 98.19 | 0.54 | – | – | – | – |
Cladostephus spongiosus (Hudson) C. Agardh | – | – | – | – | – | – | – | 0.15 | – | – | – | – | – | – |
Codium (cf) F.S. Collins & Hervey, 1917 | – | – | – | – | – | – | – | 17.43 | – | 0.19 | – | – | – | – |
Colpomenia sinuosa (Mertens ex Roth) Derbès & Solier | – | – | – | – | – | – | – | 6.97 | 3.94 | – | – | 0.39 | – | – |
Corallina elongata Ellis et Solander | – | – | 0.37 | – | – | – | – | 186.77 | 0.59 | 0.09 | – | 2.35 | – | – |
Cystoseira brachicarpa J. Agardh | 34.75 | – | – | – | – | – | – | – | – | – | – | – | – | |
Cystoseira compressa (Esper) Gerloff & Nizamuddin | – | – | – | – | – | – | – | 63.92 | 0.71 | 4.26 | – | – | – | – |
Dasycladus vermicularis (Scopoli) Krasser | 4.27 | 0.78 | 0.08 | 16.95 | – | – | – | – | 0.99 | 0.15 | – | 0.79 | – | – |
Dictyopteris membranacea (Stackhouse) Batters | – | – | – | – | – | – | – | – | – | 0.21 | – | – | – | – |
Dictyota fasciola (Roth) J. V. Lamouroux | 1.51 | – | – | – | – | – | – | 134.78 | 20.72 | 0.91 | – | 0.63 | – | – |
Flabellia petiolata (Turra) Nizamuddin | – | – | 0.344 | – | – | – | – | 0.13 | – | 0.24 | – | – | – | – |
Halimeda tuna (J. Ellis & Solander) J.V. Lamouroux | 0.09 | – | 0.17 | – | – | – | – | 0.64 | – | – | – | – | – | – |
Halopitys incurvus (Hudson) Batters | – | 5.13 | – | – | 0.19 | – | – | – | – | 1.18 | – | – | – | – |
Halopteris scoparia (Linnaeus) Sauvageau | 35.81 | – | 3.35 | – | 3.18 | – | – | 104.82 | 68.04 | 1.43 | – | – | – | – |
Jania rubens (Linnaeus) J.V. Lamouroux | 246.16 | 67.87 | 14.21 | – | – | – | – | 163.12 | – | 26.67 | – | 0.63 | – | – |
Laurencia pinnatifida (Hudson) Lamouroux | – | – | – | – | – | – | – | 1.24 | – | – | – | – | – | |
Padina pavonica (Linnaeus) Thivy | 20.31 | 26.87 | – | – | – | – | – | 44.14 | 37.16 | 5.4 | – | – | – | – |
Peyssonnelia sp. (S.G. Gmelin) Decaisne | – | – | – | – | – | – | – | – | 9.88 | – | – | – | – | |
Sargassum vulgare C.Agardh | 2.13 | – | – | – | – | – | – | 32.83 | – | – | – | – | – | |
Ulva sp. Linnaeus | – | – | – | – | – | – | – | 5.46 | 15.15 | 0.83 | – | – | – | – |
Seagrasses | ||||||||||||||
Cymodocea nodosa (Ucria) Ascherson | – | – | 44.31 | – | 79.76 | – | – | – | 1.81 | 4.21 | – | 97.05 | – | – |
P. oceanica (Linnaeus) Delile | – | – | – | – | – | 3395.83 | – | – | – | – | – | – | 4222.45 | – |
P. oceanica (dead matte) | – | – | – | – | – | – | – | – | – | 464.41 | – | – | – | – |
Vegetal biomass | 347.67 | 379.55 | 196.18 | 352.43 | 84.76 | 3395.83 | 0 | 826.49 | 326.52 | 557.73 | 250.07 | 104.86 | 4222.45 | 0 |
Species richness | 11 | 6 | 10 | 2 | 6 | 1 | 0 | 16 | 15 | 17 | 1 | 7 | 1 | 0 |
Detritus | 5.87 | 472.48 | 127.21 | 830.02 | 7.66 | 169.96 | 21.4 | 242.22 | 466.92 | 453.86 | 1123.85 | 31.55 | 322.28 | 58.63 |