El conocimiento de la biodiversidad acuática ecosistemas lénticos es escaso en muchas regiones del mundo. Por ello, se consideró importante realizar evaluaciones preliminares fauna bentónica poca profundidad tres franjas subacuáticas muestreo entre los 0 a 10 m una zona rocosa área noreste lago Coatepeque, Salvador. Las familias más abundantes fueron Thiaridae (Gastropoda), Hyalellidae (Malacos...

The impact of invasions on local biodiversity is well established, but their impact on regional biodiversity has so far been only sketchily documented. To address this question, we studied the impact at various observation scales (ranging from the microhabitat to the whole catchment) of successive arrivals of non-native amphipods on the amphipod assemblage of the Loire River basin in France. Am...

It has been suggested that both niche-based and neutral mechanisms are important for biological communities to evolve and persist. For communities in extreme and isolated environments such as caves, theoretical and empirical considerations (low species turnover, high stress, strong convergence owing to strong directional selection) predict neutral mechanisms and functional equivalence of specie...

The freshwater crustaceans from the order Amphipoda occur mainly in cold and temperate climates. However, in the tropics, these animals can be more abundant in subterranean environments, where the temperatures are milder than in surface. Despite being accepted that the number of species of freshwater amphipods in South America is lower when compared to other regions, recent descriptions have sh...

Eighteen sandy beaches were sampled along the 1659 km of the Galician coast (NW Spain) six months after the Prestige oil-spill to study the impact of the fuel and the clean-up activities on the macroinfauna community. A transect was extended at each beach, from above the drift line to below the swash line at five sampled levels; at each level six 0.05 m2 replicates were taken to a depth of 30 c...

Data about the taxonomic composition and spatial distribution of bottom invertebrates Kronotsky Gulf were obtained on results grab survey carried in September 2002. Analysis samples revealed 72 species Polychaeta, 21 molluscs (Bivalvia), 17 crustaceans (mostly Amphipoda), 2 echinodermata (Echinoidea Ophiuroidea). The average biomass depth range 25–200 m was 242±116 g/m where density 306±51 orga...

Members of the family Epimeriidae are reported in Australian waters for the first time and Epimeria rafaeli sp. nov. is described from deep water just south of the Abrolhos Island, Western Australia.