Volume 50, Issue 3 (2021)



Do different relevance attributes indicate the same conservation priorities? A case study in caves of southeastern Brazil
Maysa F.V.R. Souza, Denizar A. Alvarenga, Marconi Souza-Silva, and Rodrigo L. Ferreira

  • The biological relevance of caves changes dramatically according to their ecological attributes
  • If used alone, certain indices may be inappropriate for subterranean ecological patterns
  • Caves can be devalued for not taking into account their ecological attributes
  • We recommend the conservation of an extremely relevant cave in the study region


Geochronological implications of 210Pb and 137Cs mobility in cave guano deposits
Donald A. McFarlane and Joyce Lundberg

  • 210Pb and 137CS dating techniques have been used to establish chronologies guano deposits
  • Guano deposits may experience rapid decomposition resulting in low pH fluids in the guano
  • 210Pb and 137CS are shown to be highly mobile under moist, low Ph conditions
  • 210Pb and 137Cs chronologies should be supported by an independent, concordant 14C date series


Geochemistry of phosphatic nodules as a tool for understanding depositional and taphonomical settings in a Palaeolithic cave site (San Teodoro, Sicily)
Gerlando Vita, Vittorio Garilli, Mirko Andrea Vizzini, Renato Giarrusso, Angelo Mulone, Massimiliana Pinto Vraca, Valeria La Parola, Pierluigi Rosina, Laura Bonfiglio, and Luca Sineo

  • Geochemistry explained stratigraphy in the Palaeolithic San Teodoro Cave site
  • Study of phosphate nodules allows revision of palaeoenvironmental reconstructions
  • Variscite and amorphous phosphate formed in nodules as result of acidification by bat guano and bone dissolution
  • Taphonomical processes involving bone dissolution made sterile part of the deposit
  • Enrichment in barium and rubidium resulted from interaction of bio and geological processes


Air pressure propagation through Wind Cave and Jewel Cave: How do pressure waves travel through barometric caves?
Annika K. Gomell, Daniel C. Austin, Marc J. Ohms, and Andreas Pflitsch

  • Inside barometric caves, air pressure signals are delayed, smoothed and damped
  • These changes are caused by altitude differences and long response times of the caves
  • In Wind Cave, the related processes take place primarily in the entrance area
  • In Jewel Cave, the related processes take place primarily in the deep parts of the cave
  • Thus induced compensating currents control the caves' microclimate


The relative importance of wind-driven and chimney effect cave ventilation: Observations in Postojna Cave (Slovenia)
Lovel Kukuljan, Franci Gabrovsek, and Matthew Covington

  • Winds can enhance or diminish typical seasonal density-driven cave ventilation
  • The wind-driven effect is generated by variations in the wind pressure field
  • The effect depends on the cave configuration and its surface connections
  • This study provides a better understanding of cave climate and karst processes


Vermiculations in painted caves: New inputs from laboratory experiments and field observations
Perrine Freydier, Eric Weber, Jérôme Martin, Pierre-Yves Jeannin, Béatrice Guerrier, and Frédéric Doumenc

* Vermiculations are a major concern for painted caves

* We propose new tracks to elucidate the physical mechanisms producing these patterns

* Cohesion of natural cave sediment highly depends on water chemistry

* The sediment layer at cave wall can loose its cohesion and move to produce patterns

* A GIS has been developed to follow the evolution of vermiculations in Lascaux cave


Molecular genetic analysis of stygobiotic shrimps of the genus Xiphocaridinella (Crustacea: Decapoda: Atyidae) reveals a connection between distant caves in Central Abkhazia, southwestern Caucasus
Ivan Marin and Ilya Turbanov

  • Molecular genetic analysis of stygobiotic shrimps revealed the connectivity among distant caves
  • A new stygobiotic shrimp species is described
  • The recent diversity of the genus Xiphocaridinella from Caucasus is increasing up to 13 species
  • Karst hydrosystems can be identified with biospeleological methods (i.e. barcoding)


Continuous color model as a tool to improve speleothem age model development
Celia Campa-Bousoño, Ángel García-Pérez, Ana Moreno, Miguel Iglesias, Hai Cheng, R Lawrence Edwards, and Heather Stoll

  • Relationship between color and growth rate is described by an exponential function
  • Color growth rate model is useful in guiding optimal locations for U-Th dating
  • Color growth rate model may enable a better age model to be built with fewer dates
  • Stalagmite color does not show consistent relationships with climate indicators