Sources of Dissolved Inorganic Carbon in Two Small Streams with Different Bedrock Geology
Insights from Carbon Isotopes
Bibliographic Data
| ID | 9245017 |
|---|---|
| Authors | Naoto F Ishikawa (0000-0002-8268-9512), Ichiro Tayasu (0000-0002-3006-7973), Masako Yamane (0000-0002-5063-0719), Yūsuke Yokoyama (0000-0001-7869-5891), Saburo Sakai (0000-0002-3809-0254), Naohiko Ohkouchi (0000-0002-6355-7469) |
| Year | 2015 |
| Volume | 57 |
| Issue | 3 |
| Pages | 439-448 |
| Publication date | 2015-01-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Radiocarbon (JOURNAL) |
| Journal identifiers | ISSN: 0033-8222 • E-ISSN: 1945-5755 |
| Publisher | Cambridge University Press (CUP) (PUBLISHER) |
| DOI | 10.2458/azu_rc.57.18348 |
| OpenAlex | W4239872510 |
| Language | EN |
| Citations received | 2 |
| References cited | 35 |
Radiocarbon natural abundances (Δ 14 C) are being increasingly used to trace carbon cycling in stream ecosystems. To understand the ultimate sources of carbon, we determined the stable carbon isotope ratios (δ 13 C) and Δ 14 C values of dissolved inorganic and organic carbon (DIC and DOC, respectively) and of particulate organic carbon (POC) in two small streams in central Japan, one of which flows over limestone bedrock (Seri) and the other does not (Fudoji). Investigations over four seasons revealed that the Δ 14 C values of the DIC (from −238‰ to −174‰ for Seri and −23‰ to +10‰ for Fudoji) were less variable than those of the other carbon fractions (DOC: from −400‰ to −138‰ for Seri and −2‰ to +103‰ for Fudoji; POC: from −164‰ to −60‰ for Seri and −55‰ to +37‰ for Fudoji). Based on mass balance calculations using the δ 13 C and Δ 14 C values, the proportions of carbon in the DIC originated from (1) atmospheric CO 2 were 47% to 57% for Seri and 74% to 90% for Fudoji, (2) organic matter degradation were 29% to 35% for Seri and 4% to 21% for Fudoji, and (3) carbonate rock were 14% to 22% for Seri and 4% to 6% for Fudoji. We compared the results with previous studies that had been conducted in larger rivers and showed that in small streams, the dissolution of atmospheric CO 2 and weathering of carbonate rock are more important factors in the carbon cycling than the biological degradation of organic matter
Bedrock · Carbon cycle · Carbon dioxide · Carbon fibers · Carbonate · Dissolution · Dissolved organic carbon · Ecosystem · Geochemistry · Geomorphology · Isotopes of carbon · Mineralogy · Organic matter · Radiocarbon dating · Total inorganic carbon · Total organic carbon · Weathering · Chemistry · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Marine and coastal ecosystems · Ecology · Environmental Chemistry · Geology · Paleontology
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| Unique citing works | 2 |
|---|---|
| Citations per year | 0,25 |
| Citation span | 2018 - 2020 (3) |
| Citation velocity | historical |
| Highly cited | No |
| Citation types | Neutral: 2 |