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Canary Islands, Spain

Myers A.A.,University College Cork | Riera R.,CIMA SL | Riera R.,Qatar Environment and Energy Research Institute
Marine Biodiversity Records | Year: 2013

Medicorophium runcicorne is described from the Canary Islands. This is the first record of the genus from outside the Mediterranean and Black Seas. A key is provided to the species of Medicorophium. © Marine Biological Association of the United Kingdom 2013. Source

Riera R.,CIMA SL | Riera R.,Qatar Environment and Energy Research Institute | Becerro M.A.,CSIC - Institute of Natural Products and Agrobiology | Ramos E.,CIMA SL | And 2 more authors.
Aquaculture Research | Year: 2015

Off-shore fish farming can increase the organic load of nearby coastal marine ecosystems due to the deposition of fish food and faeces on seabeds. Seagrass meadows are particularly affected by aquaculture activities but there are few empirical data showing differential effects of the same farming activity on multiple habitat types. Here, we assessed over a 2-year period whether macrofaunal assemblages inhabiting sandy bare seabeds and Cymodocea nodosa meadows varied in their macrofaunal community structure to the fish farming activities. We observed high spatial and temporal variability in macrofauna composition and dynamics among seabed habitats and a limited impact of fish cages in their area of influence as compared with control areas. Seagrass meadows showed a higher abundance in macrofauna communities than sandy bare bottoms. Local marine currents could partially explain some results because of their influence on grain size composition. Differences in grain size resulted in higher abundances of the tanaid Apseudes talpa beneath fish cages and the absence of the sensitive amphipod Ampelisca brevicornis. Differences of resilience of seabeds (seagrass meadows and sandy bare bottoms) should be taken into account for environmental monitoring studies of off-shore fish cages. Our results suggest that hydrodynamics are a key factor to determine buffer areas between fish cages and seagrass meadows. © 2013 John Wiley & Sons Ltd. Source

Junoy J.,University of Alcala | Castellanos C.,University of Alcala | Vieitez J.M.,University of Alcala | Riera R.,CIMA SL | Riera R.,Qatar Environment and Energy Research Institute
Oceanologia | Year: 2013

The exposed sandy beach of Ladeira (Corrubedo Bay, NW Spain) was sampled during seven years (2003-2009) after the Prestige oil spill (winter 2002-03), to determine interannual variations in the macroinfaunal community in two ways: (i) through ecological indices (species richness and abundances, Shannon's diversity and Pielou's evenness) and (ii) through the density of the most representative species. A clear zonation pattern was found, consisting of two zones: (i) the supralittoral, occupied by talitrid amphipods, isopods and insects, and (ii) the intertidal, where marine crustaceans and polychaetes prevailed. The amphipods Talitrus saltator and Talorchestia deshayesii dominated from the drift line upwards, and isopods (Eurydice spp.), polychaetes (Scolelepis spp.) and the amphipod Pontocrates arenarius dominated the intertidal. Univariate indices remained constant throughout the study period in the supralittoral, but they varied widely in the intertidal zone. Multivariate analysis showed that the Prestige oil spill scarcely affected the macroinfaunal community structure during the study period (2003-2009) and its effect was limited just to the first campaign (2003), six months after the Prestige accident. © Copyright by Polish Academy of Sciences, Institute of Oceanology, 2013. Source

Riera R.,CIMA SL | Nunez J.,University of La Laguna | Martin D.,CSIC - Center for Advanced Studies of Blanes
Oceanology | Year: 2011

The spatial and temporal effects of hot seawater (60-70°C) from a power station on nearby soft-bottom communities were analyzed in the protected area "Sebadales del sur de Tenerife" (SE coast of Tenerife, Canary Islands, NE Atlantic Ocean). The samples were taken during summer 2003 and winter 2004 from 12 to 20 m depth. The highest macrofaunal abundance and species diversity were found in the turbines. A specific community, characterized by the polychaetes Aponuphis bilineata and sabellids of the genus Chone and the amphipod Photis longicaudata, inhabited the surroundings of the power station turbines. Permanent current from sea effluent had majok impact over the macrofaunal community structure of the neighbouring bottom where no measurable responses to thermal disturbance were detected. © 2011 Pleiades Publishing, Ltd. Source

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