{"id":188944,"date":"2026-02-11T16:39:20","date_gmt":"2026-02-11T20:39:20","guid":{"rendered":"https:\/\/infoelnuevonorte.com\/?p=188944"},"modified":"2026-02-11T16:39:21","modified_gmt":"2026-02-11T20:39:21","slug":"la-caja-negra-de-peces-fosilizados-en-rd-y-panama-evidencia-el-declive-en-los-arrecifes-de-coral","status":"publish","type":"post","link":"https:\/\/infoelnuevonorte.com\/?p=188944","title":{"rendered":"La \"caja negra\" de peces fosilizados en RD y Panam\u00e1 evidencia el declive en los arrecifes de coral"},"content":{"rendered":"<!--[if lt IE 9]><script>document.createElement('audio');<\/script><![endif]-->\n<audio class=\"wp-audio-shortcode\" id=\"audio-188944-1\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/mpeg\" src=\"https:\/\/infoelnuevonorte.com\/wp-content\/uploads\/2026\/02\/ttsmaker-vip-file-2026-2-11-16-37-52.mp3?_=1\" \/><a href=\"https:\/\/infoelnuevonorte.com\/wp-content\/uploads\/2026\/02\/ttsmaker-vip-file-2026-2-11-16-37-52.mp3\">https:\/\/infoelnuevonorte.com\/wp-content\/uploads\/2026\/02\/ttsmaker-vip-file-2026-2-11-16-37-52.mp3<\/a><\/audio>\n<p style=\"text-align: justify;\"><span style=\"font-size: 14pt;\">El an\u00e1lisis de la \"caja negra\" de\u00a0<strong>peces fosilizados<\/strong>\u00a0en dos arrecifes de coral del Caribe, en\u00a0<strong>Rep\u00fablica Dominicana<\/strong>\u00a0y Panam\u00e1, ha evidenciado el declive actual de la biodiversidad en estos ecosistemas, donde la cadena tr\u00f3fica se ha reducido en un 70% respecto a tiempos prehist\u00f3ricos.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: 14pt;\">As\u00ed lo pone de manifiesto una estudio recogido este martes en la revista Nature que se fundamenta en el estudio de los\u00a0<strong>otolitos<\/strong>: unas peque\u00f1as estructuras de carbonato de calcio en el o\u00eddo interno de los peces que funcionan como una especie de \"caja negra\" de estas criaturas, registrando su edad, crecimiento, migraciones y h\u00e1bitat a trav\u00e9s de anillos conc\u00e9ntricos, similares a los de los \u00e1rboles.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: 14pt;\">El an\u00e1lisis de los\u00a0<strong>otolitos<\/strong>\u00a0de los peces actuales o de los f\u00f3siles es clave para la\u00a0<strong>biolog\u00eda marina<\/strong>\u00a0y la\u00a0<strong>gesti\u00f3n pesquera<\/strong>, especialmente para diferenciar especies y entender c\u00f3mo evolucionan las poblaciones en arrecifes y otros ecosistemas.\u00a0<\/span><\/p>\n<h3 style=\"text-align: justify;\"><span style=\"font-size: 14pt;\">Dos refugios de la biodiversidad arrecifal<\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-size: 14pt;\">Los autores del estudio, entre los que se encuentra la arque\u00f3loga de arrecifes paname\u00f1a\u00a0<strong>Br\u00edgida de Gracia<\/strong>, del\u00a0<strong>Instituto Smithsonian<\/strong>, extrajeron\u00a0<strong>otolitos<\/strong>\u00a0de dos dep\u00f3sitos del\u00a0<strong>Holoceno medio<\/strong>\u00a0(hace unos 7,000 a\u00f1os) en el Caribe, situados en Bocas del Toro (Panam\u00e1), y en la cuenca del Enriquillo.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: 14pt;\">Ambos lugares poseen conjuntos de\u00a0<strong>arrecifes f\u00f3siles<\/strong>\u00a0muy bien conservados desde el\u00a0<strong>Holoceno medio<\/strong>\u00a0a tiempos recientes debido a que han sido \"muy resilientes a los cambios ambientales experimentados en el planeta a lo largo de los siglos\", ha explicado a EFE la investigadora paname\u00f1a.<\/span><\/p>\n<div id=\"detalle-parrafo\" style=\"text-align: justify;\">\n<div class=\"mb-5 newsletter-article\">\u00a0<\/div>\n<\/div>\n<p style=\"text-align: justify;\"><span style=\"font-size: 14pt;\">Los investigadores explican que recogieron muestras de sedimentos a granel, de unos\u00a0<strong>9 kilogramos<\/strong>\u00a0cada una, utilizando diferentes m\u00e9todos en funci\u00f3n del per\u00edodo de tiempo.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: 14pt;\">En los yacimientos del\u00a0<strong>Holoceno medio<\/strong>, los sedimentos se tomaron de zanjas de 3 metros de profundidad, mientras que en los\u00a0<strong>arrecifes modernos<\/strong>, los buceadores los recogieron en estratos situados entre 10 y 15 cent\u00edmetros m\u00e1s abajo del manto de corales vivos.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: 14pt;\">Las muestras se tamizaron en fracciones de tama\u00f1o y a continuaci\u00f3n los\u00a0<strong>otolitos<\/strong>\u00a0se extrajeron manualmente. Una vez en el\u00a0<strong>laboratorio<\/strong>\u00a0estudiaron los is\u00f3topos de nitr\u00f3geno contenidos en ellos, en tanto que la proporci\u00f3n de los mismos refleja la posici\u00f3n que tiene un organismo en la cadena alimentaria.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: 14pt;\">En total, se analizaron los is\u00f3topos de nitr\u00f3geno contenidos en\u00a0<strong>91 espec\u00edmenes<\/strong>\u00a0de\u00a0<strong>otolitos<\/strong>\u00a0de peces de Panam\u00e1 (42 del\u00a0<strong>Holoceno medio<\/strong>, 49 modernos) y 42 de la\u00a0<strong>Rep\u00fablica Dominicana<\/strong>\u00a0(21 del\u00a0<strong>Holoceno medio<\/strong>, 21 modernos).<\/span><\/p>\n<h3 style=\"text-align: justify;\"><span style=\"font-size: 14pt;\">Alteraci\u00f3n del equilibrio ecol\u00f3gico<\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-size: 14pt;\">El an\u00e1lisis de las muestras revel\u00f3 que las\u00a0<strong>cadenas alimentarias<\/strong>\u00a0modernas son aproximadamente un\u00a0<strong>60-70 % m\u00e1s cortas<\/strong>\u00a0que sus hom\u00f3logas en los arrecifes prehist\u00f3ricos, y que las especies que antes ocupaban posiciones m\u00e1s altas en la cadena alimentaria han pasado a ocupar\u00a0<strong>posiciones m\u00e1s bajas<\/strong>.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: 14pt;\">Adem\u00e1s, los autores han constatado una reducci\u00f3n de la variaci\u00f3n alimentaria en los\u00a0<strong>arrecifes modernos<\/strong>\u00a0en comparaci\u00f3n con los arrecifes del\u00a0<strong>Holoceno medio<\/strong>, \"lo que significa que m\u00e1s organismos compiten por un conjunto menor de recursos alimentarios y que hay menor disponibilidad de presas en los extremos superior e inferior de la cadena alimentaria\", se\u00f1ala De Gracia.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: 14pt;\">Uno de los aspectos m\u00e1s cruciales de la biodiversidad de los arrecifes es la amplia y variada selecci\u00f3n de organismos que se alimentan dentro del ecosistema y la forma en que interact\u00faan entre s\u00ed, lo que se conoce como\u00a0<strong>diversidad tr\u00f3fica<\/strong>.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: 14pt;\">En ese sentido, el deterioro de la cadena tr\u00f3fica \"hace a los\u00a0<strong>arrecifes modernos<\/strong>\u00a0cada vez m\u00e1s vulnerables a factores de estr\u00e9s como el cambio clim\u00e1tico, la sobrepesca y las enfermedades, y facilita el colapso de estos ecosistemas esenciales para, al menos, un 25 % de las especies marinas\", indica la investigadora.<\/span><\/p>\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div id=\"DenunciayAPP\" class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained 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A trav\u00e9s de la web <strong data-start=\"188\" data-end=\"212\">infoelnuevonorte.com<\/strong>, el medio ofrece informaci\u00f3n veraz y oportuna sobre los acontecimientos sociales, pol\u00edticos, comunitarios y de actualidad general, tanto a nivel nacional como internacional, promoviendo un periodismo responsable, participativo y comprometido con la libre expresi\u00f3n y el fortalecimiento de la democracia informativa.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>El an\u00e1lisis de la \"caja negra\" de\u00a0peces fosilizados\u00a0en dos arrecifes de coral del Caribe, en\u00a0Rep\u00fablica Dominicana\u00a0y Panam\u00e1, ha evidenciado el declive actual de la biodiversidad en estos ecosistemas, donde la cadena tr\u00f3fica se ha reducido en un 70% respecto a tiempos prehist\u00f3ricos. As\u00ed lo pone de manifiesto una estudio recogido este martes en la revista [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":188946,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>La &quot;caja negra&quot; de peces fosilizados en RD y Panam\u00e1 evidencia el declive en los arrecifes de coral | El Nuevo Norte<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/infoelnuevonorte.com\/?p=188944\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La &quot;caja negra&quot; de peces fosilizados en RD y Panam\u00e1 evidencia el declive en los arrecifes de coral | El Nuevo Norte\" \/>\n<meta property=\"og:description\" content=\"El an\u00e1lisis de la &quot;caja negra&quot; de\u00a0peces fosilizados\u00a0en dos arrecifes de coral del Caribe, en\u00a0Rep\u00fablica Dominicana\u00a0y Panam\u00e1, ha evidenciado el declive actual de la biodiversidad en estos ecosistemas, donde la cadena tr\u00f3fica se ha reducido en un 70% respecto a tiempos prehist\u00f3ricos. 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