| Notes: |
Alexandre Gonçalves;
Maria Alves;
Porto Covo, Sines, Portugal;
Its name comes from the presence of whelk and seashells in its sand. Fine grain, small dimention beach, seashell shaped, limited by rocks of the shale type. During high tide, the sand gets submerged. has local access by a stairway. The monthly average are 20ºC to 23ºC and, in the winter 11ºC to 13ºC, with annual peaks that go as low as 4ºC (in January) and high as 40ºC (in July). Precipitation has torrential characteristics and has its peak in December, but in general the rainy season takes place between November and April. The average annual insolation is very high. Ondulation can reach 10 meters in the winter and water temperature that vary between 14ºC and 15ºC in February, and between 20ºC and 21ºC in the summer. |
| Description: |
The species has highly differentiated basal and apical regions. Catenate pneumatocyts are also present. Older plants display an elongated main axis that, as time goes on, becomes proportionally elongated. Lower parts are flattened into 'foliar expansions' or basal leaves. Fertile regions which bear conceptacles are known as receptacles, which are normally found at the tips of the branches. Aerocyst keep the organism erect when faced against strong currents. This species is perenial so it can be used as a means of evaluating the quality of aquatic ecosystems. |
Species:
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Cystoseira humilis Schousboe ex Kützing |
