Resumen de las observaciones realizadas en cada metro de profundidad en Muelle Titán (Chafarinas). Autor: Luis Sánchez Tocino. Universidad de Granada
Representación del relieve del terreno en el Muelle Titán
El muelle “El Titán” fue construido a principios del siglo XX dentro de las mejoras del puerto de Chafarinas. Para su construcción se utilizaron bloques de hormigón y bloques naturales extraídos de las canteras de las islas. En esta zona es donde, prácticamente, se concentra la actividad de pesca deportiva con caña.
0m. La lapa Patella ferruginea predomina en el mediolitoral superior del Muelle Titán.
0m. El chorro de agua que cae del muelle procede de la planta desalinizadora.
-1m. El ramoneo de los erizos, principalmente el erizo negro (Arbacia lixula) y el erizo común (Paracentrotus lividus), limita el crecimiento de las algas al de especies coralinas incrustantes. Al fondo nada un grupo de obladas Oblada melanura.
-2m. La disminución de la luz, que se produce en las paredes verticales y en las uniones entre bloques, permite el asentamiento de varias colonias del coral naranja Astroides calycularis. Los peces negros de la izquierda son castañuelas Chromis chromis, en la parte superior, de color plateado, una oblada Oblada melanura y a la derecha un fredi o pez verde Thalassoma pavo.
-3m. En primer plano nadan varias castañuelas Chromis chromis y por detrás destacan entre las algas, por sus llamativos colores, varias colonias del coral naranja Astroides calycularis, las esponjas rojas y el alga verde, con forma globosa, Codium bursa.
-4m. En la parte inferior izquierda vemos varios ejemplares de algas invasoras del género Asparagopsis.
-5m. Aparte de los organismos anteriores podemos ver en esta imagen las esponjas Ircinia sp. y, de color negro, varios ejemplares de Sarcotragus spinosulus. Cerca de uno de ellos se aprecia un hilo de pescar.
-6m. En la parte horizontal del escalón predomina el alga parda fotófila Halopteris scoparia y en la vertical, aparte de esponjas rojas y pequeñas colonias de coral naranja Astroides calycularis, el alga verde esciáfila Flabellia petiolata.
-7m. El alga parda Halopteris scoparia predomina en los fondos del muelle El Titán.
-8m. En la parte horizontal de los grandes escalones que forma la parte sumergida del muelle, los erizos, principalmente el erizo negro (Arbacia lixula) y el erizo común (Paracentrotus lividus), limitan el crecimiento de las algas al de especies coralinas incrustantes. En las paredes verticales, menos iluminadas, de los escalones se desarrolla una comunidad más compleja.
-9m. En la base del muelle podemos encontrar algunas matas de Posidonia oceanica
-10m. Una pradera de Posidonia oceanica rodea el muelle “El Titán” dejando un pequeño claro de fondo arenoso en la parte sur.
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