{"id":5290,"date":"2015-12-02T00:00:00","date_gmt":"2015-12-02T00:00:00","guid":{"rendered":"https:\/\/lab.fabricadelandings.com.br\/portalsaofrancisco\/uncategorized\/dunas\/"},"modified":"2026-08-31T17:58:40","modified_gmt":"2026-08-31T17:58:40","slug":"dunas","status":"publish","type":"post","link":"https:\/\/lab.fabricadelandings.com.br\/portalsaofrancisco\/geografia-2\/dunas\/","title":{"rendered":"Dunas"},"content":{"rendered":"\n<strong>O que s\u00e3o dunas?<\/strong>\n\nPara facilitar no o entendimento sobre a din\u00e2mica da natureza ao que se refere as formas de relevo presentes na paisagem, os geocientistas as classificam de acordo com as suas ocorr\u00eancias.\n\nUma delas, que possui inclusive extrema import\u00e2ncia ecol\u00f3gica e ecossist\u00eamica, s\u00e3o as <strong>dunas<\/strong>, al\u00e9m de serem aporte tur\u00edstico muito grande para a popula\u00e7\u00e3o, sobretudo, aquelas que se localizam pr\u00f3ximo \u00e0 costa litor\u00e2nea.\n\nAs dunas s\u00e3o formas de relevo arenosas que se formaram e se formam devido \u00e0 intera\u00e7\u00e3o da for\u00e7a de ac\u00famulo de sedimentos de areia (dep\u00f3sitos de areias), feito pelo mar e pelo vento.\n\nEsses sedimentos arenosos s\u00e3o transportados ao longo do tempo geol\u00f3gico e por isso as dunas possuem idades variadas. Assim sendo, a princ\u00edpio as correntes mar\u00edtimas carregam grande quantidade de areia, depositando-as nas praias. Quando estes sedimentos est\u00e3o secos, tem-se o in\u00edcio do trabalho de transporte realizado pelo vento, que os modela e os fazem acumular nas partes mais elevadas das praias.\n<p class=\"imagem\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-129115 size-full\" title=\"Dunas\" src=\"https:\/\/lab.fabricadelandings.com.br\/portalsaofrancisco\/wp-content\/uploads\/2026\/08\/dunas.jpg\" alt=\"Dunas\" width=\"253\" height=\"450\" \/>\n<strong>Praia da Dunas, Cabo Frio\/RJ<\/strong>. Fotografia tirada por: Gean Alef Ramos Cardoso, 2017.<\/p>\nLogo a seguir, ocorre um processo natural de sucess\u00e3o ecol\u00f3gica que faz surgir e intensificar a vegeta\u00e7\u00e3o que recobre as dunas. Desta forma, por meio de seu complexo sistema de ra\u00edzes, a vegeta\u00e7\u00e3o que se encontra ali se mant\u00e9m at\u00e9 que se modifique a din\u00e2mica da natureza, al\u00e9m de serem respons\u00e1veis por conter o deslocamento destes pacotes de areias.\n\nPara as preservarem, a legisla\u00e7\u00e3o brasileira considera as dunas como \u00c1reas de Preserva\u00e7\u00e3o Permanente (APP), pois possui peculiaridades que as diferenciam de outras partes da plan\u00edcie costeira, a exemplo da fauna e da flora.\n\nNo entanto, ao longo da hist\u00f3ria da ocupa\u00e7\u00e3o e apropria\u00e7\u00e3o humana, as dunas tornaram-se os ecossistemas costeiros que mais sofrem com as press\u00f5es antr\u00f3picas, onde a retirada de sua vegeta\u00e7\u00e3o tem gerado consequ\u00eancias desastrosas.\n\nPortanto, o desmatamento da vegeta\u00e7\u00e3o que recobre estas extensas \u00e1reas nos litorais para dar lugar ao loteamento de veraneio, trilha para a passagem de carros e outros autom\u00f3veis e at\u00e9 mesmo para queimadas, exp\u00f5e significativamente a areia que a comp\u00f5e, favorecendo o seu deslocamento.\n\nH\u00e1 \u00e1reas bastante amea\u00e7adas pelo avan\u00e7o ou deslocamento das dunas, como por exemplo em Cabo Frio, no Rio de Janeiro, Mangue Seco na divisa dos estados da Bahia e de Sergipe e Ita\u00fanas no Espirito Santo, isto modifica e destr\u00f3i todo o ecossistema adaptado as essas localidades, al\u00e9m de sujeitar os seres humanos a graves perigoso.\n\nH\u00e1 ainda grandes dunas que se encontram em desertos arenosos, como no Saara, que possui vida adaptada as suas condi\u00e7\u00f5es clim\u00e1ticas.\n\nGean Alef Cardoso\n","protected":false},"excerpt":{"rendered":"<p>O que s\u00e3o dunas? Para facilitar no o entendimento sobre a din\u00e2mica da natureza ao que se refere as formas de relevo presentes na paisagem, os geocientistas as classificam de acordo com as suas ocorr\u00eancias. Uma delas, que possui inclusive extrema import\u00e2ncia ecol\u00f3gica e ecossist\u00eamica, s\u00e3o as dunas, al\u00e9m de serem aporte tur\u00edstico muito grande [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5293,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[52],"tags":[],"class_list":["post-5290","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-geografia-2"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Dunas - Portal S\u00e3o Francisco<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dunas - Portal S\u00e3o Francisco\" \/>\n<meta property=\"og:description\" content=\"O que s\u00e3o dunas? Para facilitar no o entendimento sobre a din\u00e2mica da natureza ao que se refere as formas de relevo presentes na paisagem, os geocientistas as classificam de acordo com as suas ocorr\u00eancias. Uma delas, que possui inclusive extrema import\u00e2ncia ecol\u00f3gica e ecossist\u00eamica, s\u00e3o as dunas, al\u00e9m de serem aporte tur\u00edstico muito grande [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lab.fabricadelandings.com.br\/portalsaofrancisco\/uncategorized\/dunas\/\" \/>\n<meta property=\"og:site_name\" content=\"Portal S\u00e3o Francisco\" \/>\n<meta property=\"article:published_time\" content=\"2015-12-02T00:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-31T17:58:40+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/lab.fabricadelandings.com.br\/portalsaofrancisco\/wp-content\/uploads\/2026\/08\/dunas.6.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"608\" \/>\n\t<meta property=\"og:image:height\" content=\"204\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/lab.fabricadelandings.com.br\\\/portalsaofrancisco\\\/uncategorized\\\/dunas\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/lab.fabricadelandings.com.br\\\/portalsaofrancisco\\\/uncategorized\\\/dunas\\\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\\\/\\\/lab.fabricadelandings.com.br\\\/portalsaofrancisco\\\/#\\\/schema\\\/person\\\/809496378e7bdc3449a70c476cbf211c\"},\"headline\":\"Dunas\",\"datePublished\":\"2015-12-02T00:00:00+00:00\",\"dateModified\":\"2026-08-31T17:58:40+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/lab.fabricadelandings.com.br\\\/portalsaofrancisco\\\/uncategorized\\\/dunas\\\/\"},\"wordCount\":477,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/lab.fabricadelandings.com.br\\\/portalsaofrancisco\\\/uncategorized\\\/dunas\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/lab.fabricadelandings.com.br\\\/portalsaofrancisco\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/dunas.6.jpg\",\"articleSection\":[\"Geografia\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/lab.fabricadelandings.com.br\\\/portalsaofrancisco\\\/uncategorized\\\/dunas\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/lab.fabricadelandings.com.br\\\/portalsaofrancisco\\\/uncategorized\\\/dunas\\\/\",\"url\":\"https:\\\/\\\/lab.fabricadelandings.com.br\\\/portalsaofrancisco\\\/uncategorized\\\/dunas\\\/\",\"name\":\"Dunas - 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