{"id":4043,"date":"2025-10-11T15:08:31","date_gmt":"2025-10-11T18:08:31","guid":{"rendered":"https:\/\/overticeportal.com.br\/?p=4043"},"modified":"2025-10-11T15:08:34","modified_gmt":"2025-10-11T18:08:34","slug":"estudo-microbios-comedores-de-metano-ajudam-a-conter-efeito-estufa","status":"publish","type":"post","link":"https:\/\/portalam9.com.br\/?p=4043","title":{"rendered":"Estudo: micr\u00f3bios \u201ccomedores\u201d de metano ajudam a conter efeito estufa"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><em>Tempo de leitura: 2 minutos <\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cientistas descobriram como microrganismos que vivem no fundo do oceano colaboram entre si para\u00a0reduzir a libera\u00e7\u00e3o de metano\u00a0\u2014 um dos gases de efeito estufa mais potentes \u2014 para a atmosfera.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O trabalho, publicado na\u00a0revista Science Advances\u00a0em agosto e detalhado pela Universidade do Sul da Calif\u00f3rnia (USC Dornsife), nos Estados Unidos, mostra que os micr\u00f3bios formam uma esp\u00e9cie de \u201crede el\u00e9trica viva\u201d capaz de transformar o g\u00e1s em energia, funcionando como um filtro natural contra o aquecimento global.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O estudo explica que o metano \u00e9 produzido naturalmente em regi\u00f5es marinhas onde h\u00e1 decomposi\u00e7\u00e3o de mat\u00e9ria org\u00e2nica. Parte desse g\u00e1s escapa por fendas no solo oce\u00e2nico, mas uma parcela significativa \u00e9 consumida por uma comunidade de\u00a0microrganismos que vive em ambientes extremos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Os organismos, chamados arqueias metanotr\u00f3ficas anaer\u00f3bias (ANME), trabalham em conjunto com bact\u00e9rias redutoras de sulfato (SRB) \u2014 duas esp\u00e9cies que, sozinhas, n\u00e3o seriam capazes de realizar o processo.Play Video<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Os pesquisadores identificaram que\u00a0essa coopera\u00e7\u00e3o acontece por meio de prote\u00ednas condutoras\u00a0que criam conex\u00f5es el\u00e9tricas entre as c\u00e9lulas. Quando as arqueias quebram o metano, elas liberam el\u00e9trons que s\u00e3o transferidos para as bact\u00e9rias.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Essas, por sua vez, usam o sulfato do ambiente para aceitar os el\u00e9trons, completando o ciclo qu\u00edmico que neutraliza o g\u00e1s. \u00c9 como se as duas esp\u00e9cies formassem um circuito el\u00e9trico microsc\u00f3pico \u2014\u00a0um mecanismo que impede que o metano suba \u00e0 superf\u00edcie.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Segundo o autor principal, Hang Yu, a descoberta ajuda a entender como processos invis\u00edveis no fundo do mar t\u00eam impacto direto no clima global. \u201cEssas parcerias microbianas atuam como sentinelas naturais, desempenhando um papel crucial em limitar a libera\u00e7\u00e3o de metano\u201d, afirmou o pesquisador no comunicado da USC.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">O metano \u00e9 o segundo maior contribuinte para o aquecimento global, atr\u00e1s apenas do di\u00f3xido de carbono. No entanto, sua capacidade de reter calor \u00e9 at\u00e9 80 vezes maior no curto prazo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ao revelar como essas comunidades microbianas conseguem neutraliz\u00e1-lo antes de alcan\u00e7ar a atmosfera, o estudo oferece novas pistas para\u00a0estrat\u00e9gias de mitiga\u00e7\u00e3o do efeito estufa\u00a0e tamb\u00e9m inspira o desenvolvimento de tecnologias que imitem esses processos naturais.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A pesquisa contou com cientistas da Caltech, do Instituto Max Planck de Microbiologia Marinha (Alemanha) e da Universidade de Pequim (China).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As amostras foram coletadas em regi\u00f5es profundas do Mediterr\u00e2neo, da costa da Calif\u00f3rnia e da Bacia de Guaymas, no Golfo do M\u00e9xico \u2014 \u00e1reas conhecidas por grandes vazamentos de metano.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para os pesquisadores, compreender\u00a0como as \u201credes el\u00e9tricas biol\u00f3gicas\u201d funcionam pode ajudar a proteger o planeta.\u00a0\u201cPode surpreender que micr\u00f3bios, mesmo nos lugares mais remotos, trabalhem juntos de formas sofisticadas que influenciam processos em escala planet\u00e1ria\u201d, destacou a cientista Victoria Orphan, da Caltech.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Fonte: Metr\u00f3poles <strong>\/ <\/strong>Foto: Escrit\u00f3rio de Explora\u00e7\u00e3o e Pesquisa Oce\u00e2nica da NOAA<br><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tempo de leitura: 2 minutos Cientistas descobriram como microrganismos que vivem no fundo do oceano<\/p>\n","protected":false},"author":3,"featured_media":4044,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-4043","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-curiosidades-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - 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