•  
  •  
 

Most Popular Papers *

PDF

The impact of burning on the structure and mineral composition of bat guano
Joyce Lundberg and Donald A. McFarlane

  • Many features of burnt guano cannot easily be distinguished from non-burnt guano
  • Rapid dehydration from burning causes morphological change to crystals (cracking, striations)
  • Many so-called “high temperature” minerals are not diagnostic of fire, other than graphite.
  • Most “high temperature” minerals can also be produced at low temperatures
  • Spontaneous combustion of guano (without human involvement) is extremely unlikely

PDF

Cave-dwelling heleomyzid flies (Diptera: Heleomyzidae) from the Polish caves. Historical overview and new data
Joanna Kocot-Zalewska and Andrzej J. Woźnica

  • Altogether 23 heleomyzid species from 7 genera were identified
  • 1 species was considered as troglobiont, i.e., Oecothea praecox
  • 11 species were recognized as eutroglophiles, 9 as subtroglophiles, 2 as trogloxenes
  • Dominant taxa: Scoliocentra brachypterna, Heleomyza captiosa, Eccoptomera pallescens
  • The highest number of species has been found in the Kraków-Częstochowa Upland

PDF

A world review of fungi, yeasts, and slime molds in caves
Karen J. Vanderwolf, David Malloch, Donald F. McAlpine, and Graham J. Forbes

PDF

Bat guano minerals and mineralization processes in Chameau Cave, Eastern Morocco
Philippe Audra, Vasile Heresanu, Lionel Barriquand, Mohamed El Kadiri Boutchich, Stephane Jaillet, Edwige Pons-Branchu, Pavel Bosak, Hai Cheng, R Lawrence Edwards, and Michel Renda

  • Bat guano decay produced leachates resulting in phosphates and sulfates
  • Minerals are grouped in precursors and result from reaction with carbonates and phyllosilicates
  • Old fluvial deposits have been deeply weathered and phosphatized by guano leachates
  • Pure “candy-floss” gypsum piles could be related to specific condensation/evaporation conditions
  • Besides dust particles, condensation is an essential factor controlling guano decay in dry caves

PDF

Safe and effective disinfection of show cave infrastructure in a time of COVID-19
Hazel A. Barton

  • Showcaves have unique challenges to coronavirus disinfection
  • The chemistry of coronaviruses suggest they will adsorb to limestone
  • The chemistry of limestone surfaces is likely to inactivate coronaviruses
  • Effective disinfectants with minimal impact on caves were identified
  • Face masks and social distancing remain critical in preventing disease

PDF

Multi-criteria analysis for mapping susceptibility to iron formation caves development in the Gandarela mountain range (MG), southeast Brazil
Iraydes Tálita Nola and Luis Almeida Bacellar

  • Karst features in iron-rich geological materials are described
  • The genesis and geographical location of iron caves are not yet properly defined
  • The susceptibility of caves using fuzzy AHP demonstrate good predictive ability
  • Iron formation caves susceptibility map is useful for speleological prospecting
  • Slope gradient criterion was relevant for assessing the susceptibility of caves

PDF

Bacteria, guano and soot: Source assessment of organic matter preserved in black laminae in stalagmites from caves of the Sierra de Atapuerca (N Spain)
Joeri Kaal, Virginia Martínez-Pillado, Antonio Martínez Cortizas, Jorge Sanjurjo Sánchez, Arantza Aranburu, Juan-Luis Arsuaga, and Eneko Iriarte

  • We determined the molecular composition of speleothem organics in black laminae
  • Py-GC-MS and THM-GC-MS indicate bacteria, soot and guano remains
  • Soot marks nearby human activity but microbial sources prevail
  • Molecular screening of bulk organics is a tool to decide further targeted analyses

PDF

Microbiological study in a gneissic cave from Sri Lanka, with special focus on potential antimicrobial activities
Ethige Isuru P. Silva, Pathmakumara Jayasingha, Saman Senanayake, Anura Dandeniya, and Dona Helani Munasinghe

  • Sthreepura Cave, Sri Lanka, has extreme conditions with close to strong acidic cave-sediments
  • Four cave wall-dwelling fungal isolates were identified as the first records in Sri Lanka
  • Of eight fungal isolates, three showed antimicrobial activity against at least one human pathogen
  • Aspergillus fumigatus strain had good antimicrobial activities against Staphylococcus aureus
  • Four chemical fractions with antimicrobial activities against S. aureus were identified

PDF

Flow dynamics in a vadose shaft – a case study from the Hochschwab karst massif (Northern Calcareous Alps, Austria)
Eva Kaminsky, Lukas Plan, Thomas Wagner, Barbara Funk, and Pauline Oberender

  • Highly dynamic runoff (factor 9500) in a vadose canyon 100 m below the surface
  • Transit velocities differ by three orders of magnitude between base and high flow
  • Recession analysis and numerical modelling indicate a low water storage volume

* Based on the average number of full-text downloads per day since the paper was posted.
» Updated as of 06/04/21.