Storage and distribution of organic carbon in cave sediments: examples from two caves in the northern karst region of Puerto Rico
Environmental Earth Sciences, ISSN: 1866-6299, Vol: 82, Issue: 1
2023
- 4Citations
- 9Captures
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Metrics Details
- Citations4
- Citation Indexes4
- Captures9
- Readers9
Article Description
The clastic sediments that accumulate in cave settings can be an important storage reservoir for organic carbon. This study reports on grain size, total organic carbon (TOC) concentrations, and total organic carbon: total organic nitrogen (TOC:TON) ratios measured in sediments from two caves in Puerto Rico. El Tallonal Cave (TAL) is a small cave with a flowing stream; the sediments in TAL were collected from a deposit that is being actively eroded. Clara Cave (CAM) is an upper level of the Río Camuy Cave System; the sediments from CAM were newly deposited by an internal river that rose in response to Hurricane Maria. Sediments collected from both caves were poorly sorted and contained no apparent stratigraphic correlation. CAM sediments contained a larger range in TOC concentrations but were overall lower than TOC in the TAL sediments. In TAL, the TOC concentrations were higher in sediments collected from below the erosional terrace. TOC:TON ratios from sediments at both caves were highly variable, highlighting the heterogeneous deposition and storage of organic matter. Despite the observed variation, TOC concentrations in both cave systems could cause retardation of organic contaminants by up to two orders-of-magnitude, implying that deposited sediments influence the fate of organic contaminants in the groundwater; therefore, cave sediments could facilitate long term storage of organic carbon and associated contaminants.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85145351627&origin=inward; http://dx.doi.org/10.1007/s12665-022-10720-2; http://www.ncbi.nlm.nih.gov/pubmed/38840929; https://link.springer.com/10.1007/s12665-022-10720-2; https://dx.doi.org/10.1007/s12665-022-10720-2; https://link.springer.com/article/10.1007/s12665-022-10720-2
Springer Science and Business Media LLC
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