12/25/2023 0 Comments Defining and assessing benthic recovery following dredging and dredged material disposalThe above method of dredging is the one most used on European coasts and its physical impacts relate to substrate removal, alteration of bottom topography, overflows into the water column and re-deposition of material (De Groot 1996). The effects of dredging on marine organisms and the recolonization of disturbed areas can be very diverse, and have been studied repeatedly (McCall 1977 Rosenberg 1977 López-Jamar and Mejuto 1988 Defeo 1996 Kenny and Rees 1996 Newell et al. The removal of sediment and fauna, and the re-suspension and re-deposition of the finest material extracted, resulted in various alterations to the bottoms directly affected, as well as to the fauna of neighbouring rocky substrates. A total of 2 million m 3 of sediment was extracted using a trailer suction hopper dredging to landfills at Port of Algeciras. These studies indicated a good environmental quality in the outermost areas of the bay, especially at Getares Inlet, but also revealed certain conditions which restrict the occurrence of organisms in the interior part.įrom March to June 1993 the Getares inlet was subjected to dredging works in a strip running between 15 and 30 m in depth. 1997 Sánchez-Moyano and García-Gómez 1998 Sánchez-Moyano et al. The effects of human activities on the coastal fauna of Algeciras Bay have been demonstrated previously by diverse studies on the distribution of the algal epifauna, soft-bottom communities and special animal groups such as sponges and ascidians (Carballo et al. This is mainly due to the natural topography and intensive industrial activities over the past 30 years, which have resulted in the construction of sea walls, breakwaters and landfills. The coast of Algeciras Bay, located in the easternmost zone of the Strait of Gibraltar, is environmentally diverse despite its relatively limited extent (approximately 30 km in length and 8 km in width at the mouth).
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