Abstract
Worldwide, there are at least 12 ILTER sites with an emphasis on karst, landforms arising from the combination of high rock solubility and well-developed solutional channel porosity underground, but the study of cave ecosystems has been largely neglected. Only two ILTER sites, both in Slovenia, are primarily caves. Caves are under-represented for several reasons, but especially because of the overall difficulty of access and the lack of a clear research agenda for cave ecosystem studies. We review several aspects of long-term studies in Postojna Planina Cave System (PPCS), proposing our approach as a model for ILTER research in caves. In PPCS, analysis of short-term temperature data shows a muted daily cycle and seasonality, and analysis of long-term temperature data shows an increase, largely the result of climate change. Changes in drip rate of epikarst aquifers above the cave are correlated with rainfall but with lags and complications resulting from differences in longer term rainfall patterns. Analysis of discharge rates indicates a rapid response to precipitation not only in the Pivka River at its sinking, but also at Unica Spring, where discharge is augmented from other parts of the aquifer, including epikarst. Quantitative analysis of the obligate epikarst-dwelling copepod community shows that, unlike most cave communities, complete sampling of the fauna is possible. Finally, organic carbon levels in PPCS indicate likely carbon limitation in the system. These five factors (temperature, drip rate, river discharge, epikarst copepod fauna, and organic carbon) are the appropriate variables for capturing the essential long-term trends in cave ecosystems and their causes.
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Notes
We use the Slovenian names for the sections of the cave, including Postojnska jama, but use the English name for the cave system (Postojna Planina Cave System), in order to use the name of the ILTER site.
References
ARSO (2017) http://vode.arso.gov.si/hidarhiv/pov_arhiv_tab.php. Accessed 24 Apr 2017. https://doi.org/10.1016/j.pharep.2017.12.005
Auler A (2012) Quartzite caves in South America. In: White WB, Culver DC (eds) Encyclopedia of caves, 2nd edn. Academic/Elsevier Press, Amsterdam, pp 635–639. https://doi.org/10.1016/b978-0-12-383832-2.00093-1
Badino G (2010) Underground meteorology—what’s the weather underground? Acta Carsologica 39:427–448. https://doi.org/10.3986/ac.v39i3.74
Cigna AA (2002) Modern trend[s] in cave monitoring. Acta Carsologica 31:35–54. https://doi.org/10.3986/ac.v31i1.402
Colwell RK (2013) EstimateS: statistical estimation of species richness and shared species from samples. Version 9. User’s Guide and application http://purl.oclc.org/estimates. Accessed 25 Apr 2017
Covington M, Perne M (2015) Consider a cylindrical cave: a physicist’s view of cave and karst science. Acta Carsologica 44:363–380 https://doi.org/10.3986/ac.v44i3.1925
Crestani G, Anelli F (1939) Ricerche di meteorologia ipogea delle grotte di Postumia. Istitutopolografico dello stato Libreria, Roma
Culver DC, Pipan T (2009) The biology of caves and other subterranean habitats. Oxford Univ Press, Oxford. https://doi.org/10.1097/GIM.0b013e3181b2e5eb
Culver DC, Pipan T (2013) Subterranean ecosystems. In: Levin SA (ed) Encyclopedia of biodiversity, vol 7, 2nd edn. Academic Press, Waltham, pp 49–62. https://doi.org/10.1016/B978-0-12-384719-5.00224-0
Danielopol DL, Rouch R (1991) L'adaptation des organismes au milieu aqautique souterrain. Reflexionssur l'apport des recherches ecologiques recentes. Stygologia 3:129–142
Domínguez-Villar D, Lojen S, Krklec K, Baker A, Fairchild IJ (2015) Is global warming affecting cave temperatures? Experimental and model data from a paradigmatic case study. Clim Dyn 45:569–681. https://doi.org/10.1007/s00382-014-2226-1
Engel AS (2012) Chemoautotrophy. In: White WB, Culver DC (eds) Encyclopedia of caves, 2nd edn. Academic/Elsevier Press, Amsterdam, pp 125–134. https://doi.org/10.1016/b978-0-12-383832-2.00019-0
Engel AS (2015) Preface. In: Engel AS (ed) Microbial life of cave systems. De Gruyter, Berlin, pp v–vi. https://doi.org/10.1515/9783110339888-001
Fairchild IJ, Baker A (2012) Speleothem science. From process to past environments. Wiley-Blackwell, Chichester. https://doi.org/10.1002/9781444361094
Ford DC, Williams PW (2007) Karst hydrogeology and geomorphology. Wiley, Chichester
Friedrich M (2013) Biological clocks and visual systems in cave-adapted animals at the dawn of speleogenomics. Integr Comp Biol 53:50–67. https://doi.org/10.1093/icb/ict058
Gaberščik A (2003) Jezero, ki izginja. Društvo Ekologov Slovenije, Ljubljana
Gams I (1974) Concentration of CO2 in caves in relation to the air circulation (in the case of the Postojna Cave). Acta Carsologica 6:183–192
Genthon P, Bataille A, Fromant A, D’Hulst D, Bourges F (2005) Temperature as a marker for karstic waters hydrodynamics. Inferences from 1 year recording at La Peyrére cave (Ariège, France). J Hydrol 311:157–171. https://doi.org/10.1016/j.jhydrol.2005.01.015
Gibert J (1986) Ecologie d’un systeme karstique jurassien. Hydrogéologie, derive animale, transits de matières, dynamique de la population de Niphargus (Crustacé Amphipode). Mém Biospéol 13:1–379
Hartmann A, Baker A (2017) Modelling karst vadose zone hydrology and its relevance for paleoclimatereconstruction. Earth Sci Rev 172:178–192. https://doi.org/10.1016/j.earscirev.2017.08.001
Horvatinčić N, Bronić IK, Obelić B (2003) Differences in the 14C age, δ13C and δ18O of Holocene tufa and speleothem in the Dinaric Karst. Palaeogeogr Palaeoclimatol Palaeoecol 193:139–157. https://doi.org/10.1016/S0031-0182(03)00224-4
ILTER (2018) https://data.ilter-europe.net/deims/. Accessed 24 Jan 2018. https://doi.org/10.1111/add.14244
Kaufmann G, Gabrovšek F, Turk J (2016) Modelling flow of subterranean Pivka river in Postojnska jama, Slovenia. Acta Carsologica 45:57–70. https://doi.org/10.3986/ac.v45i1.3059
Klimchouk A (2015) The karst paradigm: changes, trends, and perspectives. Acta Carsologica 44:289–313. https://doi.org/10.3986/ac.v44i3.2996
Kogovšek J (2010) Characteristics of percolation through the karst vadose zone. ZRC Publishing, Ljubljana
Kogovšek J, Šebela S (2004) Water tracing through the vadose zone above Postojnska Jama, Slovenia. Environ Geol 45:992–1001. https://doi.org/10.1007/s00254-003-0958-z
Kogovšek J, Urbanc J (2007) Ocena dinamike premikajoče vode skozi vadozno cono Postojnske jame na osnovi izotopskih značilnosti. Geologija 56:477–486. https://doi.org/10.5474/geologija.2007.033
Kresic N (2013) Water in karst: management, vulnerability, and restoration. McGraw-Hill, New York
Kresic N, Stevanovic Z (2010) Groundwater hydrology of springs. Elsevier, Amsterdam
Lange J, Arbel Y, Grodek T, Greenbaum N (2010) Water percolation process studies in a Mediterranean karst area. Hydrol Process 24:1866–1879. https://doi.org/10.1002/hyp.7624
Mammola S, Goodacre SL, Isaia M (2017) Climate change may drive cave spiders to extinction. Ecography 40. https://doi.org/10.7717/peerj.3972
Mayaud C, Wagner T, Benischke R, Birk S (2013) Understanding changes in the hydrological behaviour within a karst aquifer (Lurbach system, Austria). Carbonates Evaporites 31:357–365. https://doi.org/10.1007/s13146-013-0172-3
McDonald J, Drysdale R (2007) Hydrology of cave drip waters at varying bedrock depth from a karst system in southeastern Australia. Hydrol Process 21:1737–1748. https://doi.org/10.1002/hyp.6356
Monroe WH (1972) A glossary of karst terminology. U.S. Geol Survey Water Supply Paper 1899-K. U.S. Geol Survey, Washington. https://doi.org/10.1172/JCI107074
Novak T, Janžekovič F, Lipovšek S (2013) Contribution of non-troglobiotic terrestrial invertebrates to carbon input in hypogean habitats. Acta Carsologica 42:301–309. https://doi.org/10.3986/ac.v42i2-3.669
Odum HT (1957) Trophic structure and productivity of Silver Springs, Florida. Ecol Monogr 27:55–112. https://doi.org/10.2307/1948571
Palmer AN (2007) Cave geology. Cave Books, Dayton
Parker CW, Wolf JA, Auler AS, Barton HA, Senko JM (2013) Microbial reducibility of Fe (III) phases associated with the genesis of iron ore caves in the Iron Quadrangle, Minas Gerais, Brazil. Minerals 3:395–411. https://doi.org/10.3390/min3040395
Petrič M (2011) Spatial and temporal variations of natural traces in a karst spring catchment at the Planina polje (SW Slovenia). In: Bertrand, C. (ed) Proceedings of the 9th conference on limestone hydrogeology = Actes du 9ème congrès d’hydrogéologie en pays calcaire, Besançon, France, September 1–3, 2011. [S. l.]: UMR 6249 Chrono-Environnment. pp 399–402
Petrič M (2017) Flow dynamics in a karst aquifer studied by means of natural and artificial tracers: a case study of the Malenščica and Unica karst springs. Geologija 60:211–221. https://doi.org/10.5474/geologija.2017.015
Pipan T (2005) Epikarst – a promising habitat. Založba ZRC, ZRC Publishing, Ljubljana
Pipan T, Culver DC (2007) Regional species richness in an obligate subterranean dwelling fauna—epikarst copepods. J Biogeogr 34:854–861. https://doi.org/10.1111/j.1365-2699.2006.01667.x
Pipan T, Culver DC (2013) Forty years of epikarst: what biology have we learned? Int J Speleol 42:225–233. https://doi.org/10.5038/1827-806X.42.3.5
Pipan T, Christman MC, Culver DC (2006) Dynamics of epikarst communities: microgeographic pattern and environmental determinants of epikarst copepods in Organ Cave, West Virginia. Am Midl Nat 156:75–87. https://doi.org/10.1674/0003-0031(2006)156[75:DOECMP]2.0.CO;2
Pipan T, Holt N, Culver DC (2010) How to protect a diverse, poorly known, inaccessible fauna: identification of source and sink habitats in the epikarst. Aquat Conserv Mar Freshwat Ecosyst 20:748–755. https://doi.org/10.1002/aqc.1148
Pipan T, López H, Oromí P, Polak S, Culver DC (2011) Temperature variation and the presence of troglobionts in shallow subterranean habitats. J Nat Hist 45:253–273. https://doi.org/10.1080/00222933.2010.523797
Rice EW, Baird RB, Eaton AD (2017) Standard methods for the examination of water and wastewater, 23rd edn. Am Pub Health Assoc, Washington, DC. https://doi.org/10.1097/INF.0000000000001875
Romero A (2009) Cave biology. Life in darkness. Cambridge Univ Press, Cambridge. https://doi.org/10.2174/157340309789317887
Rouch R (1970) Recherches sure les eaux souterraines—12—Le système karstique du Baget. I. Lephénoméne d’ “hémorragie’ au niveau de l’exutoire principal. Ann Spéléol 25:665–709
Rouch R (1977) Considérations sur l’écosystème karstique. Comp Rend Acad Sci, Paris 284:1101–1103
Schneider K, Christman MC, Fagan WF (2011) The influence of resource subsidies on cave invertebrates: results from an ecosystem-level manipulation experiment. Ecology 92:765–776. https://doi.org/10.1890/10-0157.1
Šebela S (2012) Postojna-Planina cave system. In: White WB, Culver DC (eds) Encyclopedia of caves, 2nd edn. Academic/Elsevier Press, Amsterdam, pp 618–624. https://doi.org/10.1016/B978-0-12-383832-2.00091-8
Šebela S, Turk J (2011) Local characteristics of Postojna Cave climate, air temperature, and pressure monitoring. Theor Appl Climatol 105:371–386. https://doi.org/10.1007/s00704-011-0397-9
Šebela S, Turk J, Pipan T (2015) Cave micro-climate and tourism: towards 200 years (1819-2015) atPostojnska jama (Slovenia). Cave Karst Sci 42:78–85
Simon KS (2013) Organic matter flux in the epikarst of the Dorvan karst. Acta Carsologica 42:237–244. https://doi.org/10.3986/ac.v42i2-3.665
Simon KS, Benfield EF (2001) Leaf and wood breakdown in cave streams. J N Am Benthol Soc 20:550–563. https://doi.org/10.2307/1468087
Simon KS, Benfield EF (2002) Ammonium retention and whole-stream metabolism in cave streams. Hydrobiologia 482:31–39. https://doi.org/10.1023/A:1021257822591
Simon KS, Benfield EF, Macko SA (2003) Food web structure and the role of epilithic films in cave streams. Ecology 84:2395–2406. https://doi.org/10.1094/PHYTO.2003.93.11.1422
Simon KS, Pipan T, Culver DC (2007) A conceptual model of the flow and distribution of organic carbon incaves. J Cave Karst Stud 69:279–284
Simon KS, Pipan T, Ohno T, Culver DC (2010) Spatial and temporal patterns in abundance and character of dissolved organic matter in two karst aquifers. Fundam Appl Limnol 177:81–92. https://doi.org/10.1127/1863-9135/2010/0177-0081
Sket B (1979) Jamska favna notranjskega trikotnika (Cerknica-Postojna-Planina), njena ogroženost in naravovarstveni pomen. Varstvo Narave 12:45–59
Sket B, Velkovrh F (1981) Postojnsko-Planinski jamski sistem kot model za preučevanje onesnaženjapodzemeljskih voda. Naše Jame 22:27–44
Turk J (2010) Hydrological role of large conduits in karst drainage system: examples from the Ljubljanica River catchment area. Dissertation, University of Nova Gorica
Venarsky MP, Huntsman BM, Huryn AD, Benstead JP, Kuhajda BR (2014) Quantitative food web analysis supports the energy-limitation hypothesis in cave stream ecosystems. Oecologia 176:859–869. https://doi.org/10.1007/s00442-014-3042-3
Williams PW (2008) The role of the epikarst in karst and cave hydrogeology: a review. Int J Speleol 37:1–10. https://doi.org/10.5038/1827-806X.37.1.1
Worthington RH, Soley RVN (2017) Identifying turbulent flow in carbonate aquifers. J Hydrol 552:70–80. https://doi.org/10.1016/j.jhydrol.2017.06.045
Worthington SRH, Jeannin P-Y, Alexander EC, Davies GJ, Schindel GM (2017) Contrasting definitions for the term ‘karst aquifer’. Hydrogeol J 25:1237–1240. https://doi.org/10.1007/s10040-017-1628-7
Zagmajster M, Culver DC, Sket B (2008) Species richness patterns of obligate subterranean beetles in a global biodiversity hotspot—effect of scale and sampling intensity. Divers Distrib 14:95–105. https://doi.org/10.1111/j.1472-4642.2007.00423.x
Zagmajster M, Culver DC, Christman MC, Sket B (2010) Evaluating the sampling bias in pattern of subterranean species richness—combining approaches. Biodivers Conserv 19:3035–3048. https://doi.org/10.1007/s10531-010-9873-2
Acknowledgments
We thank Wolfgang Cramer, Editor-in-Chief, Thomas Dirnböck, Guest Editor, Christopher Reyer, and two anonymous reviewers for their valuable comments and suggestions.
Funding
This work was supported by grants from the European Commission (GA: 654359 - H2020 INFRAIA, eLTER and GA: 739558 - H2020 INFRADEV Advance_eLTER), and from the Slovenian Research Agency (ARRS projects “Natural resources of karst show caves: a balance among protection, exploitation, and promotion [no. J7-7100,]” and “Karst research for sustainable use of Škocjan Caves as World Heritage [(no. L7-8268)].
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Discharge from the sinking of the Pivka River and the emergence at Unica Spring, and precipitation. (GIF 30 kb)
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Pipan, T., Petrič, M., Šebela, S. et al. Analyzing climate change and surface-subsurface interactions using the Postojna Planina Cave System (Slovenia) as a model system. Reg Environ Change 19, 379–389 (2019). https://doi.org/10.1007/s10113-018-1349-z
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DOI: https://doi.org/10.1007/s10113-018-1349-z