{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,16]],"date-time":"2026-01-16T02:48:09Z","timestamp":1768531689964,"version":"3.49.0"},"reference-count":80,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2021,9,14]],"date-time":"2021-09-14T00:00:00Z","timestamp":1631577600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100013416","name":"Indian Institute of Science Education and Research Kolkata","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100013416","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Geobiology"],"published-print":{"date-parts":[[2022,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The Deccan Traps in Western India is hypothesized to have caused significant fluctuations in climatic condition and organic matter (OM) productivity across the Cretaceous\u2010Paleogene Boundary (K\/PgB). The periodic release of large amounts of volatiles into the atmosphere is thought to drive these changes. Yet, direct impact of volcanism on the carbon cycle and ecosystem remains relatively unconstrained. For the first time, we attempt to trace changes in both marine and terrestrial carbon reservoirs from pre\u2010 and intervolcanic sedimentary units (infra\u2010 and inter\u2010trappeans respectively) from Rajahmundry, ~1500\u00a0km SE of main eruption sites in Western India. Molecular level characterization of OM and stable isotope composition of carbonates (\u03b4<jats:sup>13<\/jats:sup>C<jats:sub>carb<\/jats:sub>), bulk OM (\u03b4<jats:sup>13<\/jats:sup>C<jats:sub>org<\/jats:sub>), and <jats:italic>n<\/jats:italic>\u2010alkane (\u03b4<jats:sup>13<\/jats:sup>C<jats:sub>alk<\/jats:sub> and \u03b4D<jats:sub>alk<\/jats:sub>) have been analysed to provide a chemo\u2010stratigraphic framework. In Rajahmundry, high CO<jats:sub>2<\/jats:sub> concentration estimated from infra\u2010trappean carbonate nodule is synchronous with the onset of the Deccan Traps and the Late Maastrichtian warming episode. Impact of the warming event is reflected in Rajahmundry from a major shift in the terrestrial ecosystem. Marine OM production also seems to have been low throughout the infra\u2010trappean. A steady decrease in \u03b4<jats:sup>13<\/jats:sup>C<jats:sub>carb<\/jats:sub> values, increase in mortality rates and dwarfism in invertebrates immediately below the first volcanic units in Rajahmundry suggest stressed conditions from eruption in the western part of India ~40\u201360\u00a0kyrs prior to K\/PgB. A significant increase in heterotrophic activity is observed after the volcanic deposits in Rajahmundry that seems to have controlled the marine carbon reservoir for a maximum of ~200\u00a0kyrs after the boundary. Advent of pteridophytes, increase in carbon content and positive shifts in \u03b4<jats:sup>13<\/jats:sup>C<jats:sub>carb<\/jats:sub> and \u03b4<jats:sup>13<\/jats:sup>C<jats:sub>alk<\/jats:sub> values in the upper inter\u2010trappean units mark the onset of recovery in terrestrial and marine environments. Overall, our results suggest significant perturbations in the carbon reservoir as a consequence of the Deccan eruption.<\/jats:p>","DOI":"10.1111\/gbi.12468","type":"journal-article","created":{"date-parts":[[2021,9,14]],"date-time":"2021-09-14T11:56:02Z","timestamp":1631620562000},"page":"22-40","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Carbon reservoir perturbations induced by Deccan volcanism: Stable isotope and biomolecular perspectives from shallow marine environment in Eastern India"],"prefix":"10.1111","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1841-053X","authenticated-orcid":false,"given":"Sohom","family":"Roy","sequence":"first","affiliation":[{"name":"Department of Earth Sciences Indian Institute of Science Education and Research Kolkata Nadia West Bengal India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sambit","family":"Ghosh","sequence":"additional","affiliation":[{"name":"Department of Earth Sciences Indian Institute of Science Education and Research Kolkata Nadia West Bengal India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Prasanta","family":"Sanyal","sequence":"additional","affiliation":[{"name":"Department of Earth Sciences Indian Institute of Science Education and Research Kolkata Nadia West Bengal India"},{"name":"Centre for Climate and Environmental Studies Indian Institute of Science Education and Research Kolkata Nadia West Bengal India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,9,14]]},"reference":[{"key":"e_1_2_9_2_1","first-page":"75","article-title":"Chemostratigraphic correlation of four fossil\u2010bearing sections in southwestern North Dakota","volume":"361","author":"Arens N. 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