{
  "abstract": "Study region: The Zijiang River is a subtropical monsoonal tributary of the middle Yangtze River, China, characterized by intensive cascade-reservoir regulation along its mainstem. Study focus: We focused on four successive cascade dams and the five longitudinal locations they define (D1–D5), with D1 as the upstream reference and D2–D5 as successive dam-regulated reaches. We examined how hydrological seasonality interacts with repeated cascade regulation to shape DOC and DIC sources, concentrations, and export using seasonal observations integrated with isotope, statistical, and discharge-conditioned analyses. New hydrological insights for the region: DOC and DIC displayed a seasonal reversal, with higher DOC in flood season and higher DIC in non-flood season. Yet export timing diverged: in 2023/24, flood-season water carried 63.7–77.7% of annual DOC export, whereas non-flood season carried 57.9–69.6% of DIC export. Plankton-associated DOC dominated D1–D3, then shifted towards mixed plankton–soil contributions in D4–D5. DIC retained a carbonate-weathering background, while soil-CO₂ contribution increased from D3 downstream. Cascade damming was associated with both carbon pools through distinct environmental pathways. These results show that carbon budgets in cascade rivers must resolve season, dam sequence, source composition and in-river processing rather than rely on concentration snapshots.",
  "abstract_shown": true,
  "affiliations": [
    "Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China; National Field Scientific Observation and Research Station of Dongting Lake Wetland Ecosystem in Hunan Province, Changsha, 410125, China",
    "Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China; National Field Scientific Observation and Research Station of Dongting Lake Wetland Ecosystem in Hunan Province, Changsha, 410125, China; Corresponding authors at: Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China.",
    "Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China",
    "Climate Center of Hunan Province, Changsha, 410118, China",
    "College of Geographic Science, Hunan Normal University, Changsha, 410081, China",
    "Changsha General Survey of Natural Resources Center, China Geological Survey, Changsha, 410600, China",
    "Department of Biological Sciences, the University of Québec at Montreal, Montreal, QC, H3C 3P8, Canada"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 13,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Wentao Xu"
    },
    {
      "affs": [
        0
      ],
      "name": "Yu Cui"
    },
    {
      "affs": [
        1
      ],
      "name": "Zhengmiao Deng"
    },
    {
      "affs": [
        2
      ],
      "name": "Hao Qu"
    },
    {
      "affs": [
        3
      ],
      "name": "Lijie Duan"
    },
    {
      "affs": [
        4
      ],
      "name": "Cicheng Zhang"
    },
    {
      "affs": [
        5
      ],
      "name": "Zhitao Huo"
    },
    {
      "affs": [
        5
      ],
      "name": "Yuan Zhao"
    },
    {
      "affs": [
        0
      ],
      "name": "Feng Li"
    },
    {
      "affs": [
        0
      ],
      "name": "Liyan Wang"
    },
    {
      "affs": [
        0
      ],
      "name": "Tao Wang"
    },
    {
      "affs": [
        6
      ],
      "name": "Changhui Peng"
    },
    {
      "affs": [
        1
      ],
      "name": "Yonghong Xie"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fjk1j1e19xj2k.bib",
  "cited_by": 0,
  "doi": "10.1016/j.ejrh.2026.104114",
  "fulltext_url": "http://www.sciencedirect.com/science/article/pii/S2214581826010128",
  "id": "fjk1j1e19xj2k",
  "issns": [
    "2214-5818"
  ],
  "landing_url": "https://doi.org/10.1016/j.ejrh.2026.104114",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "lcc",
      "GB3-5030"
    ],
    [
      "lcc",
      "QE1-996.5"
    ],
    [
      "openalex",
      "2304|Soil and Water Nutrient Dynamics"
    ]
  ],
  "openalex": "W7223153686",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-30",
  "publisher": "Elsevier",
  "ris": "https://research.draconitic.com/paper/fjk1j1e19xj2k.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T13:43:36Z",
      "native_id": "b3b3613735304671b3bea9db7bdeaeee",
      "source": "doaj",
      "url": "https://doi.org/10.1016/j.ejrh.2026.104114"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2304|Soil and Water Nutrient Dynamics",
      "subfield": "environmental"
    }
  ],
  "title": "Seasonal divergence in dissolved-carbon concentration and export along a cascade-dammed subtropical river continuum: A case study of the",
  "title_text": "Seasonal divergence in dissolved-carbon concentration and export along a cascade-dammed subtropical river continuum: A case study of the",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T13:43:36Z",
  "url": "https://research.draconitic.com/paper/fjk1j1e19xj2k",
  "venue": "Journal of Hydrology: Regional Studies",
  "versions": []
}