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Contribución al estudio faunístico del bentos fluvial del rio Lozoya (Sierra de Guadarrama, España)

1990; Linguagem: Inglês

10.23818/limn.06.08

2660-8537

C. Casado,

Mediterranean and Iberian flora and fauna

The faunistic composition of principal aquatic insect taxa which belong to the fluvial macrobenthos of the Lozoya river was studied.Four series of benthic seasonal samples were taken during 1980-81.Some obse~ations are made concerning the distribution of the most relevant species and biogeographical analysis was undertaken to detect the historical factors characterizing their communities.A large number of different species have been identified among the lotic fauna.Many of these species sheltered in this basin in different geological periods and a lot of them have been placed in the prepleistocene age.The fluvial fauna show an important number of species with a very limited distribution, some of them being practically confined to Spain.For this reason this watershed perfom a sort of reserve in species with great environmental value.Figura 1.-Situación de los puntos de muestreo en el n o Lozoya para el presente estudio.Situation of sampling stations in the Lozoya nver.