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Articles 1 - 4 of 4
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Differences In Aquatic Microcrustacean Assemblages Between Temporary And Perennial Springs Of An Alpine Karstic Aquifer, Nataša Mori, Anton Brancelj
Differences In Aquatic Microcrustacean Assemblages Between Temporary And Perennial Springs Of An Alpine Karstic Aquifer, Nataša Mori, Anton Brancelj
International Journal of Speleology
Microcrustacean (Copepoda, Ostracoda) assemblages were investigated at the interface of the vadose and phreatic zones in the alpine karstic aquifer from the Julian Alps in Slovenia (SE Europe). Two temporary and one perennial karstic outlets were sampled by filtering the water several times over 2 years. Concurrently, benthos from the mouth of a perennial spring and from an adjacent spring brook were collected. Altogether 24 microcrustacean species were recorded. The spatial and temporal variation in drift densities and species composition was high indicating complex groundwater hydrological pathways being dependent on precipitation regime. Non-metric Multidimensional Scaling (NMDS) clearly separated drift samples …
Forty Years Of Epikarst: What Biology Have We Learned?, Tanja Pipan, David Culver
Forty Years Of Epikarst: What Biology Have We Learned?, Tanja Pipan, David Culver
International Journal of Speleology
Epikarst is not only an important component of the hydrogeology of karst and an active site of speleogenesis, it is habitat for a number of species adapted to subterranean life. Water in epikarst, with a residence time of days to months, is a highly heterogeneous habitat, and the animals are primarily sampled from continuously sampling dripping water or collecting from residual drip pools. While the subterranean fauna of cracks and crevices has been known for over 100 years, it is only in the past several decades that epikarst has been recognized as a distinct habitat, with reproducing populations of stygobionts. …
Spatial And Temporal Changes In Invertebrate Assemblage Structure From The Entrance To Deep-Cave Zone Of A Temperate Marble Cave, Benjamin W. Tobin, Benjamin T. Hutchins, Benjamin F. Schwartz
Spatial And Temporal Changes In Invertebrate Assemblage Structure From The Entrance To Deep-Cave Zone Of A Temperate Marble Cave, Benjamin W. Tobin, Benjamin T. Hutchins, Benjamin F. Schwartz
International Journal of Speleology
Seasonality in surface weather results in seasonal temperature and humidity changes in caves. Ecological and physiological differences among trogloxenes, troglophiles, and troglobionts result in species-dependent responses to this variability. To investigate these responses, we conducted five biological inventories in a marble cave in the Sierra Nevada Range, California, USA between May and December, 2010. The cave was divided into six quadrats and temperature was continuously logged in each (humidity was logged at the entrance and in the deep cave). With increasing distance from the entrance, temperature changes were increasingly attenuated and lagged relative to surface temperature. Linear regressions were created …
Diversity And Biosynthetic Potential Of Culturable Aerobic Heterotrophic Bacteria Isolated From Magura Cave, Bulgaria, Iva Tomova, Irina Lazarkevich, Anna Tomova, Margarita Kambourova, Evgenia Vasileva-Tonkova
Diversity And Biosynthetic Potential Of Culturable Aerobic Heterotrophic Bacteria Isolated From Magura Cave, Bulgaria, Iva Tomova, Irina Lazarkevich, Anna Tomova, Margarita Kambourova, Evgenia Vasileva-Tonkova
International Journal of Speleology
Biocapacity of bacteria inhabiting karstic caves to produce valuable biologically active compounds is still slightly investigated. A total of 46 culturable heterotrophic bacteria were isolated under aerobic conditions from the Gallery with pre-historical drawings in MaguraCave, Bulgaria. Phylogenetic analysis revealed that most of bacterial isolates affiliated with Proteobacteria (63%), followed by Actinobacteria (10.9%), Bacteroidetes (10.9%), and Firmicutes (6.5%). A strong domination of Gram-negative bacteria (total 81%) belonging to nine genera: Serratia, Pseudomonas, Enterobacter, Sphingobacterium, Stenotrophomonas, Commamonas, Acinetobacter, Obesumbacterium, and Myroides, was observed. Gram-positive isolates were represented by the genera Bacillus, Arthrobacter, and Micrococcus. One isolate …