{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T20:58:29Z","timestamp":1792789109213,"version":"4.5.0"},"reference-count":72,"publisher":"MDPI AG","issue":"19","license":[{"start":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T00:00:00Z","timestamp":1790121600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Agencia Nacional de Investigaci\u00f3n y Desarrollo (ANID), Chile","award":["R20F0009"],"award-info":[{"award-number":["R20F0009"]}],"id":[{"id":"https:\/\/ror.org\/05btm5233","id-type":"ROR","asserted-by":"crossref"}]},{"award":["R20F0009"],"award-info":[{"award-number":["R20F0009"]}],"id":[{"id":"https:\/\/ror.org\/05btm5233","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Universidad Arturo Prat","award":["UNAP-CONSOLIDA-SINCPROYEXT-0105"],"award-info":[{"award-number":["UNAP-CONSOLIDA-SINCPROYEXT-0105"]}],"id":[{"id":"https:\/\/ror.org\/01hrxxx24","id-type":"ROR","asserted-by":"crossref"}]},{"name":"Universidad Arturo Prat","award":["UNAP-PROFUNDIZA-SINCPROYEXT-0325"],"award-info":[{"award-number":["UNAP-PROFUNDIZA-SINCPROYEXT-0325"]}],"id":[{"id":"https:\/\/ror.org\/01hrxxx24","id-type":"ROR","asserted-by":"crossref"}]},{"name":"Universidad Arturo Prat","award":["UNAP-MODERNIZA-SINCPROYEXT-0333"],"award-info":[{"award-number":["UNAP-MODERNIZA-SINCPROYEXT-0333"]}],"id":[{"id":"https:\/\/ror.org\/01hrxxx24","id-type":"ROR","asserted-by":"crossref"}]},{"award":["UNAP-CONSOLIDA-SINCPROYEXT-0105"],"award-info":[{"award-number":["UNAP-CONSOLIDA-SINCPROYEXT-0105"]}],"id":[{"id":"https:\/\/ror.org\/01hrxxx24","id-type":"ROR","asserted-by":"publisher"}]},{"award":["UNAP-PROFUNDIZA-SINCPROYEXT-0325"],"award-info":[{"award-number":["UNAP-PROFUNDIZA-SINCPROYEXT-0325"]}],"id":[{"id":"https:\/\/ror.org\/01hrxxx24","id-type":"ROR","asserted-by":"publisher"}]},{"award":["UNAP-MODERNIZA-SINCPROYEXT-0333"],"award-info":[{"award-number":["UNAP-MODERNIZA-SINCPROYEXT-0333"]}],"id":[{"id":"https:\/\/ror.org\/01hrxxx24","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biology"],"abstract":"<jats:p>Coastal food webs are sustained by two contrasting energy channels\u2014a fast pelagic pathway fueled by phytoplankton and a slow benthic pathway built on detrital processing\u2014yet whether these channels remain segregated or become progressively coupled as energy moves toward higher consumers is still poorly resolved, particularly in remote, environmentally variable systems. We tested these competing scenarios\u2014channel compartmentalization versus channel coupling\u2014using carbon (\u03b413C) and nitrogen (\u03b415N) stable isotopes across a four-level food web in the Francisco Coloane Marine Coastal Protected Area, a subantarctic system in the Strait of Magellan, Chile. Lower-trophic consumers showed strong isotopic differentiation, tracking access to distinct basal resources, but this segregation gave way to substantial niche convergence at intermediate trophic levels, where overlap probabilities exceeded 60%. Macroalgal-derived carbon dominated assimilation across resident consumers (50\u201380%), while sediment organic matter acted as an integrative pool rather than an independent pathway, blending detrital inputs from multiple sources. The clearest evidence for channel coupling came from the squat lobster Grimothea gregaria: its pelagic and benthic life stages occupied opposite ends of the isotopic gradient, showing that a single species can physically cross channels that appear isotopically segregated at the community level. Together, these results indicate that benthic and pelagic energy pathways in this protected area are not independent but progressively integrated as energy moves up the food web\u2014a pattern with direct implications for how spatial management should treat habitat connectivity in coastal marine reserves.<\/jats:p>","DOI":"10.3390\/biology15191699","type":"journal-article","created":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T16:10:31Z","timestamp":1790179831000},"page":"1699","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["From Basal Sources to Top Predators: Isotopic Evidence of Trophic Organization in the Francisco Coloane Coastal Marine Protected Area"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1619-911X","authenticated-orcid":false,"given":"Lisette","family":"Zenteno-Devaud","sequence":"first","affiliation":[{"name":"Divisi\u00f3n de Investigaci\u00f3n y Aplicaciones Nucleares, Comisi\u00f3n Chilena de Energ\u00eda Nuclear (CCHEN), Nueva Bilbao 12501, Santiago 7600713, Chile"},{"name":"Centro de Estudios del Cuaternario Fuego-Patagonia y Ant\u00e1rtica (CEQUA), Avenida El Bosque 0296, Punta Arenas 6200000, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0981-7434","authenticated-orcid":false,"given":"Gabriela V.","family":"Aguirre-Mart\u00ednez","sequence":"additional","affiliation":[{"name":"Facultad de Ciencias de la Salud, Universidad Arturo Prat, Avenida Arturo Prat 2120, Iquique 1110939, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-6676-3954","authenticated-orcid":false,"given":"Mat\u00edas","family":"C\u00e1rcamo-Ch\u00e1vez","sequence":"additional","affiliation":[{"name":"Centro de Estudios del Cuaternario Fuego-Patagonia y Ant\u00e1rtica (CEQUA), Avenida El Bosque 0296, Punta Arenas 6200000, Chile"},{"name":"Mag\u00edster en Bioinform\u00e1tica, Facultad de Ingenier\u00eda, Universidad de Magallanes, Av. Pdte. Manuel Bulnes 01855, Punta Arenas 6200985, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paola","family":"Acu\u00f1a-G\u00f3mez","sequence":"additional","affiliation":[{"name":"Centro de Estudios del Cuaternario Fuego-Patagonia y Ant\u00e1rtica (CEQUA), Avenida El Bosque 0296, Punta Arenas 6200000, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6106-0838","authenticated-orcid":false,"given":"Jorge","family":"Acevedo","sequence":"additional","affiliation":[{"name":"Centro de Estudios del Cuaternario Fuego-Patagonia y Ant\u00e1rtica (CEQUA), Avenida El Bosque 0296, Punta Arenas 6200000, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-1498-7500","authenticated-orcid":false,"given":"Claudio A.","family":"Moraga","sequence":"additional","affiliation":[{"name":"Centro de Estudios del Cuaternario Fuego-Patagonia y Ant\u00e1rtica (CEQUA), Avenida El Bosque 0296, Punta Arenas 6200000, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-4560-0911","authenticated-orcid":false,"given":"Lautaro","family":"Oyarz\u00fan-Galaz","sequence":"additional","affiliation":[{"name":"Centro de Estudios del Cuaternario Fuego-Patagonia y Ant\u00e1rtica (CEQUA), Avenida El Bosque 0296, Punta Arenas 6200000, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pedro","family":"Valenzuela","sequence":"additional","affiliation":[{"name":"Centro de Estudios del Cuaternario Fuego-Patagonia y Ant\u00e1rtica (CEQUA), Avenida El Bosque 0296, Punta Arenas 6200000, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anelio","family":"Aguayo-Lobo","sequence":"additional","affiliation":[{"name":"Centro de Estudios del Cuaternario Fuego-Patagonia y Ant\u00e1rtica (CEQUA), Avenida El Bosque 0296, Punta Arenas 6200000, Chile"},{"name":"Departamento Cient\u00edfico, Instituto Ant\u00e1rtico Chileno (INACH), Plaza Mu\u00f1oz Gamero 1055, Punta Arenas 6210427, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,9,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"794","DOI":"10.1038\/27427","article-title":"Weak trophic interactions and the balance of nature","volume":"395","author":"McCann","year":"1998","journal-title":"Nature"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"40","DOI":"10.1016\/j.tree.2011.09.001","article-title":"Integrating food web diversity, structure and stability","volume":"27","author":"Rooney","year":"2012","journal-title":"Trends Ecol. 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