SOMMAIRE

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Carbonate reservoir diagenesis associated to connate water/fresh water interaction within a thermal aquifer located in the central-northern part of the Moesian Platform (Romania)

LUCICA NICULAE, HORIA MITROFAN, CONSTANTIN MARIN

Article keywords: Sedimentary basin, connate water, freshwater, diagenesis, calcite retrograde solubility, Moesian Platform

Article: The Moesian Platform sedimentary basin, which occupies large parts of Romania and of Bulgaria, includes a several hundred meters thick carbonate formation of Late Jurassic – Early Cretaceous age. The regional aquifer hosted by that reservoir formation has been tapped by several deep (up to 3,300 m) wells, drilled in southern Romania during the late 1980s and early 1990s

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Preliminary results on the quality of drinking water sources in the Runcuri Plateau

DANIELA BORDA, LAURA EPURE, IOANA NICOLETA MELEG, IOAN COCIUBA

Article keywords: Karst plateau, springs, physico-chemical parameters, microbial hazard, water invertebrates, anthropogenic impact, organic pollution

Article: We developed a comparative study, between the 2009-2010 and 2015-2016 sampling campaigns, in order to monitor the changes occurred in the quality of seven drinking water sources, after few springs from the Runcuri Plateau were taped into the locals’ homes. A special view was given to the geology of the Runcuri Plateau and to the relationship between the geological substrate and physicochemical profile, microbial content, and invertebrate communities of the analyzed springs

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Contribution to the study of the Trichoniscidae (Isopioda, Oniscidea). I. Definition and taxonomic position

IONEL TABACARU, ANDREI GIURGINCA

Article keywords: Species concept, genealogic approach, systems approach, evolutionary biology, thematic subjects, natural sciences

Article: In this first note, we present the taxonomic position and the differential diagnosis of the family Trichoniscidae. In our opinion from the common ancestor of Oniscidea two lineages evolved: a lineage evolved toward the complete disappearance of the genital apophyses leaving only two separated male genital openings (Infraorder Tylomorpha) while the other lineage evolved toward merging the two genital apophyses up to the fusion of the ejaculatory ducts and a single genital opening (Infraorder Ligiamorpha)

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Rich and diverse subterranean invertebrate communities inhabiting Melissotrypa Cave in Central Greece

IONUŢ POPA, TRAIAN BRAD, MARKOS VAXEVANOPOULOS, ANDREI GIURGINCA, ŞTEFAN C. BABA, SANDA IEPURE, RODICA PLĂIAŞU, SERBAN M. SARBU

Article keywords: Sulfidic cave, subterranean invertebrates, chemoautotrophy, Melissotrypa Cave, Greece

Article: Located in central Greece, Melissotrypa Cave is a hypogenic cave that contains a sulfidic lake. Biological investigations in this cave led to the discovery of several endemic troglobitic invertebrates, some of which occur in high densities of up to 200 specimens per square meter

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MARCIAN D. BLEAHU (1924–2019)

CRISTIAN GORAN

Article keywords: In memoriam, Marcian Bleahu, Karst Morphology, Karst Landforms

Article: Next to Emil G. Racovitza, the great explorer, scholar and founder of biospeleology, the “second father” of Romanian speleology must necessarily be the geologist Marcian Bleahu, tireless researcher of the karst and promoter of the schoolof physical speleology and karst

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VASILICA IAVORSCHI (1948–2019)

ANDREI GIURGINCA

Article keywords: In memoriam, Vasilica Iavorschi

Article: On 29 October 2019, the researchers of “Emile Racovitza” Institute of Speleology lost one of their most dear colleague and friend, Vasilica Iavorschi, due to an unforgiving illness

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ŞTEFAN NEGREA (1930–2019)

DUMITRU MURARIU, IONEL G. TABACARU, EUGEN NITZU

Article keywords: In memoriam, Stefan Negrea

Article: Dr. Ştefan Negrea worked in the Institute of Speleology “reborn” in Bucharest in 1956, under the leadership of the emeritus professor Constantin Motaş (until 1969), then under the guidance of Prof. Traian Orghidan, Dr. Costin Rădulescu (correspondent member of the Romanian Academy) and Dr. Ioan Povară.

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