12 research outputs found

    Groundwater life: some new biospeleological views resulting from the Ophel paradigm

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    The functioning of the new chemoautotrophic biome Ophel (POR, 2007) isdiscussed based on its type locality, the Ayyalon groundwater pool, which is compared to the Movile cave and the Frasassi caves. The specific role of the thermosbaenaceans as first consumers in chemoautotrophic systems is emphasized. New views are presented concerning the zoogeography of the ophelic biome and a new theory is advanced about the origin of the ophelic fauna, which differs from the Tethyan stranding theory

    Sulfide Shrimp? Observations on the concealed life history of the Thermosbaenacea (Crustacea)

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    The discovery and subsequent observation over various years of a massive population of the thermosbaenacean Tethysbaena ophelicola Wagner in the subterranean karstic sulfide pool of Ayyalon (Israel) enabled us to reach conclusions about the previously unknown life strategy of this crustacean super-order. These are preferably monophagous sulfur-bacteria-eating pelagic shrimps of stratified subterranean pools, adapted to microaerobic-anaerobic conditions, by among others ovoviviparity and the probable help of sulfide detoxifying bacterial endosymbiosis

    The Persistent Progression: A Third View on Animal Evolution

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    Abstract. Animal evolution is seen today through the dilemma of two reigning views. The first sees animal evolution as a shallow sequence of contingent accidents and catastrophic extinctions. The second, accepting a progressive trend in this evolution, sees a hidden vitalistic or deistic force at work. I propose a third way which accepts progressivism, but considers it to be a historical consequence of directional dissipative thermodynamic processes which are acting on the globe. The animals have a crucial role in stimulating the gradual expansion of the biosphere and the increasingly efficient recycling within it. The different animal phyla, irreversibly marked by their morpho-physiological signatures are the selective and selected players in this process. The terrestrial environment, once colonised, provides for maximum biomass and highest animal efficiency and complexity. The thermoregulating vertebrates and among them the human species selected out as the recent culmination of this evolution

    The subterranean fauna associated with the blind Palaemonid prawn Typhlocaris galilea Calman

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    Exploration of the subterranean tract of the spring of En-Nur (at the North end of Lake Tiberias) by scuba diving and by use of new collecting methods, led to the discovery of a living community associated with the blind prawn Typhlocaris galilea. A rich growth of sulphur bacteria and of pigmentless Cyanophyceae from the trophic basis in this peculiar biotope. Representatives of three hypogeic crustacean orders have been found as well as some peculiar gastropods, nematods and oligocaets. The latter are the main food of Typhlocaris galilea

    River Jordan—The Survival and Future of a Very Special River

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    The Juréia Ecological Reserve, São Paulo, Brazil—Facts and Plans

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