Anales de biología Vol. 8 (1986) Biología ambiental, 2

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    Methods for the study of Marine Benthos: reseña bibliográfica
    (Murcia: Universidad de Murcia, Servicio de Publicaciones, 1986) Pérez Ruzafa, Angel; Facultad de Biología
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    The ecology of aquatic insects: reseña bibliográfica
    (Murcia: Universidad de Murcia, Servicio de Publicaciones, 1986) Puig, M.ª A.; Facultad de Biología
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    Ecología y ordenación del territorio: el caso del Mar Menor y ecosistemas adyacentes (Murcia, SE España). 11: prospección y sectorización del medio biótico y humano
    (Murcia: Universidad de Murcia, Servicio de Publicaciones, 1986) Martín de Agar Valverde, María del Pilar; Ramírez-Díaz, Luis; Torres Martínez, Antonio Ángel; Facultad de Biología
    This report is the second part of a study of Environmental lmpact Analysis on the Mar Menor area and its neighbouring ecosystems. The phase of biotic and human environment survey and land units stablishment is described, based on the characterization of intemally homogeneous sectors (Units) in relation to those biotic, of landscape and human components that shape this area of study. Four themes have been considered: Vegetation (25), Faune (28), Land Uses (23) and Landscape (21). The figures refer to the numbers of characterized units. The units obtained are cartographically shown on a scale 1: 50.000. The considerations on the environmental state of the area of study has been taked, as previous phase to the environmental impact analysis of the human activities.
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    Gradiente longitudinal de distribución de la vegetación ribereña del río Bernesga (León) en su tramo de montaña
    (Murcia: Universidad de Murcia, Servicio de Publicaciones, 1986) Fernández Aláez, C.; Calabuig, E. Luis; Fernández Aláez, M.; Facultad de Biología
    The distribution o€ macrophytic vegetation associated to the mountain stretch o€ the Bernesga river (León, Spain) is anaiysed on the basis o€ the data coliected in 36 transects distributed on both banks and perpendicular to the river bed. The similarity among the sarnples placed along the river is on the whole low, except in those having an outstanding presence o€ Carex acuta subsp. broteriana; nevertheless, the strongest affinity among close transects allows to taik o€ a continous change in the vegetation. The best delimited areas embrace, on the one hand, the first kilometers where there are no real banks and both sides o€ the river are covered mainly by swampy meadows and harvest grassland with a high degree of dampness; and, on the other, the lower part where the riparian community gets its own physiognomy and Agrostis stolonifera, Mentha longifolia and mostly Carex acuta subsp. broteriana constitute the most important species.
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    Ecosistemas de rios temporales: ecología de las poblaciones de efemerópteros de la cuenca del rio Bembézar (Sierra Morena)
    (Murcia: Universidad de Murcia, Servicio de Publicaciones, 1986) Puig, M. A.; Ferreras Romero, M.; Rojas, M. R.; Facultad de Biología
    Three types of streams are noted for the temporary basin of the Bembézar river: the temporary streams, the permanent streams and the temporary streams with stable pools in summer. )4 species of Ephemeroptera have been caugth along two years (1982 and 1983). The distribution of these species has been different from year to year. An individual pattern of the community evolution for each sampling site has been observed.