{
  "abstract": "Genetic diversity within species can shape food webs and ecosystem functioning as strongly as species diversity, yet the genomic architecture underlying these effects remains unclear. Gene-to-ecosystem relationships may arise from genome-wide diversity, from a limited number of ecologically-important genes, or a combination of both. Experimental tests of these hypotheses are lacking. Here, we manipulated genomic diversity of a top-predatory fish in mesocosms under ambient or warm conditions, and quantified ecological responses spanning fish biomass, prey communities and ecosystem functions. Genome-wide diversity explained few ecological responses, with moderate effects (r=0.260). In contrast, variation at specific candidate SNPs predicted all ecological responses consistently across climatic conditions, with effect sizes being more than twice those of genome-wide estimates (r=0.599). Moreover, combining information from small subsets of candidate SNPs outperformed both single-locus and genome-wide diversity for all ecological responses (r=0.841), consistent with an oligogenic architecture for gene-to-ecosystem relationships. Enrichment analyses revealed functional pathways related to growth, development and metabolic regulation, driven by a small set of pleiotropic genes. We demonstrate that the ecological consequences of intraspecific genetic variation arose from a limited fraction of the genome, highlighting the importance of functional genomic structure, rather than genome-wide diversity alone, in shaping eco-evolutionary dynamics.",
  "abstract_shown": true,
  "affiliations": [
    "Centre National de la Recherche Scientifique"
  ],
  "article_type": "New results",
  "arxiv": null,
  "author_total": 10,
  "authors": [
    {
      "name": "M. Stanislawek"
    },
    {
      "name": "P. Nosil"
    },
    {
      "name": "A. Raffard"
    },
    {
      "name": "L. Fargeot"
    },
    {
      "name": "M. Richard"
    },
    {
      "name": "M. Krick"
    },
    {
      "name": "C. Poesy"
    },
    {
      "name": "M. Lefort"
    },
    {
      "name": "G. Loot"
    },
    {
      "affs": [
        0
      ],
      "name": "S. Blanchet"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/28d7abba9rjr0.bib",
  "cited_by": 0,
  "doi": "10.64898/2026.10.20.760412",
  "fulltext_url": "https://www.biorxiv.org/content/10.64898/2026.10.20.760412v1.full",
  "id": "28d7abba9rjr0",
  "issns": [],
  "landing_url": "https://www.biorxiv.org/content/10.64898/2026.10.20.760412v1",
  "language": null,
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "biorxiv",
      "ecology"
    ],
    [
      "openalex",
      "1311|Genetic diversity and population structure"
    ]
  ],
  "openalex": "W7223086385",
  "pdf_url": "https://www.biorxiv.org/content/10.64898/2026.10.20.760412v1.full.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-20",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/28d7abba9rjr0.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:28:55Z",
      "native_id": "10.64898/2026.10.20.760412",
      "source": "biorxiv",
      "url": "https://www.biorxiv.org/content/10.64898/2026.10.20.760412v1"
    }
  ],
  "subjects": [
    {
      "field": "biology",
      "origin": "biorxiv:ecology",
      "subfield": "ecology"
    }
  ],
  "title": "A few genes modulate the ecological impact of a freshwater fish species on food webs and ecosystem functions",
  "title_text": "A few genes modulate the ecological impact of a freshwater fish species on food webs and ecosystem functions",
  "type": "preprint",
  "updated_at": "2026-10-30T12:28:55Z",
  "url": "https://research.draconitic.com/paper/28d7abba9rjr0",
  "venue": "bioRxiv",
  "versions": []
}