{"ok":true,"nota":{"id":"45c864baa0bf0117","slug":"sedimentos-de-humedales-guardan-adn-antiguo-que-muestra-como-cambio-la-45c864","titulo":"Sedimentos de humedales guardan ADN antiguo que muestra cómo cambió la diversidad de especies costeras","resumen":"Analizaron ADN preservado en capas de sedimento fechadas de ocho humedales costeros del Atlántico y el Mediterráneo. Así reconstruyeron cómo variaron en el tiempo distintas versiones genéticas de especies nativas, introducidas y de origen incierto.","fuente":"biorxiv","fuenteNombre":"bioRxiv · preprints","color":"#be2628","autor":"Banos, E., Holman, L., Nogue, S., Rius, M.","url":"https://www.biorxiv.org/content/10.64898/2026.11.03.763919v1?rss=1","imagen":"/hoy/portada/45c864baa0bf0117","tema":"ciencia","subtemas":["adn antiguo","humedales","biodiversidad","especies invasoras","metabarcoding"],"entidades":["bioRxiv"],"formato":"dato","entretenimiento":false,"pubTs":"2026-11-04T00:00:00.000Z","indexTs":"2026-11-04T21:39:25.920Z","hash":"c902f2b3c9fd59d5c00fbc93971bb0b472b88edac180172359b815bea11ff13e","tsa":{"time":"Nov  4 21:39:41 2026 GMT","provider":"freetsa.org","sobre":"sello"},"stats":{"views":0,"likes":0,"clicks":0,"dwell":0},"tipo":"normal","registro":"hallazgo","porQueImporta":"El barro de un humedal funciona como un archivo: permite ver cómo cambiaron las poblaciones de una especie sin tener que esperar décadas de monitoreo. Esto sirve para decidir qué especies conservar o controlar en costas donde hay turismo, pesca y puertos. La pregunta incómoda es cuánto de lo que consideramos natural ya llegó con nosotros.","quienFirma":"Preprint en bioRxiv (no revisado por pares)","confianza":"preprint","consulta":null},"sello":{"hash":"c902f2b3c9fd59d5c00fbc93971bb0b472b88edac180172359b815bea11ff13e","sello":"acd7026e8304cedacf239ede70863cdb3b3c7a5c11487b0852235190ba219706","beacon":{"drand":{"cadena":"8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce","ronda":6613245,"aleatorio":"cf02b78fab8cf476520c24c3870689bcb1dff24dbc0fc5cdf04ffb7f06d95594","tiempo":"2026-11-04T21:39:30.000Z"},"nist":{"cadena":2,"pulso":2013556,"salida":"E50C43F1A10D4D529A5400C9EF76AE4C99F1CCC597621C25193955C47B9194F531E0413EAAF4A5B185745E9A089E523429CDF1825D6C95F8640F8B43CA46E1C6","tiempo":"2026-11-04T21:38:00.000Z"},"noAntes":"2026-11-04T21:39:30.000Z"},"verificacion":{"drand":true,"nist":true},"tsa":{"time":"Nov  4 21:39:41 2026 GMT","provider":"freetsa.org","sobre":"sello"},"original":{"titulo":"SedaDNA metabarcoding reveals hidden histories of within-species sequence variation","descripcion":"Most genetic data come from contemporary populations, leaving historical changes in within-species variation poorly documented. Sedimentary ancient DNA (sedaDNA) offers an opportunity to recover historical sequence variation, but its potential to reconstruct temporal changes in within-species composition remains underexplored. Here, we analysed dated sediment cores from eight Atlantic and Mediterranean coastal wetlands using COI and 18S metabarcoding, treating amplicon sequence variants as putative haplotypes. Across native, non-indigenous and cryptogenic taxa, accumulated haplotype diversity and geographic sharing varied markedly among species and markers, without consistently distinguishin","pubDate":"2026-11-04","url":"https://www.biorxiv.org/content/10.64898/2026.11.03.763919v1?rss=1"},"indexado":"2026-11-04T21:39:25.920Z"}}