Selected papers from an international and multidisciplinary symposium on
Carbon and Boundaries in Karst, Carlsbad, New Mexico, January 7 to January 11, 2013,
organised by Karst Waters Institute (KWI) and the National Cave and Karst Research Institute (NCRKI).

Guest editor David C. Culver, Introduction to the symposium--

"From January 7 to January 11, 2013, the Karst waters Institute (KwI) and the National Cave and Karst Research Institute (NCRKI) held an international and multidisciplinary symposium on Carbon and Boundaries in Karst at NCKRI headquarters in Carlsbad, New Mexico.

There is growing interest in the dynamics of both inorganic and organic carbon in karst systems, and especially in the flux of carbon and nutrients between the surface and subsurface, and between different components (e.g. epikarst and vadose zone) in the karst subsurface. This symposium was about these and other questions connected to carbon in karst and boundaries in karst. It was especially timely both because of rapid advances in the field and the importance of carbon sequestration in global climate change The symposium highlighted recent advances in biology, geology, and hydrology that are helping us understand the dynamics of karst ecosystems, especially with respect to carbon. The talks were organized around seven main themes:

Sixty participants from seven countries attended the week-long meeting which included an excursion to Carlsbad Caverns National Park. For the first time at a KwI meeting, several participants, who were unable to attend in person, gave their presentations via Skype. The meeting was highlighted by two keynote presentations:

Two most distinguished karst scientists, William B. White of Pennsylvania State University and Derek Ford of McMaster University jointly summed up the meeting. ..."

EDITORIAL
Franci Gabrovsek

ORIGINAL PAPERS

Carbon fluxes in Karst aquifers: Sources, sinks, and the effect of storm flow/ William B. White

Do carbonate karst terrains affect the global carbon cycle?/ Jonathan B. Martin, Amy Brown, John Ezell

Quaternary glacial cycles: Karst processes and the global CO2 budget/ Erik B. Larson, John E. Mylroie

A framework for assessing the role of karst conduit morphology, hydrology, and evolution in the transport and storage of carbon and associated sediments/ George Veni

Biological Control on Acid Generation at the Conduit-Bedrock Boundary in Submerged Caves: Quantification through Geochemical Modeling/ Janet S. Herman, Alexandria G. Hounshell, Rima B. Franklin, Aaron L. Mills

An approach for collection of nearfield groundwater samples in submerged limestone caverns/ Aaron L. Mills, Terrence N. Tysall, Janet S. Herman

Organic matter flux in the epikarst of the Dorvan karst, France/ Kevin S. Simon

Environmental controls on organic matter production and transport across surface-subsurface and geochemical boundaries in the Edwards aquifer, Texas, USA/ Benjamin T. Hutchins, Benjamin F. Schwartz, Annette S. Engel

Using isotopes of dissolved inorganic carbon species and water to separate sources of recharge in a cave spring, northwestern Arkansas, USA Blowing Spring Cave/ Katherine J. Knierim, Erik Pollock, Phillip D. Hays

Isotopes of Carbon in a Karst Aquifer of the Cumberland Plateau of Kentucky, USA/ Lee J. Florea

Organic Carbon in Shallow Subterranean Habitats/ Tanja Pipan, David C. Culver

Contribution of non-troglobiotic terrestrial invertebrates to carbon input in hypogean habitats/ Tone Novak, Franc Janžekovič, Saška Lipovšček

Physical Structure of the Epikarst/ William K. Jones

Using hydrogeochemical and ecohydrologic responses to understand epikarst process in semi-arid systems, Edwards plateau, Texas, USA/ Benjamin F. Schwartz, Susanne Schwinning, Brett Gerrard, Kelly R. Kukowski, Chasity L. Stinson, Heather C. Dammeyer

Variability of groundwater flow and transport processes in karst under different hydrologic conditions/ Nataša Ravbar

Spring discharge records - a case study/ Carol M. Wick