{"id":4670,"date":"2021-03-15T11:00:28","date_gmt":"2021-03-15T10:00:28","guid":{"rendered":"https:\/\/resoilfoundation.org\/?p=4670"},"modified":"2021-03-17T09:44:11","modified_gmt":"2021-03-17T08:44:11","slug":"methane-deforestation-microbes","status":"publish","type":"post","link":"https:\/\/resoilfoundation.org\/en\/environment\/methane-deforestation-microbes\/","title":{"rendered":"How deforestation triggers greenhouse gas emissions by soil microbes"},"content":{"rendered":"

Study reveals the role of microbes in driving methane release from soil. Deforestation plays against climate. But restoration strategies are useful<\/h2>\n

by Matteo Cavallito<\/p>\n

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In the Brazilian Amazon<\/strong>, deforestation areas, often converted to livestock farming or intensive agriculture, have a greater tendency to release methane<\/strong>. But in restored zones the tendency to emit the gas is significantly reduced to the same levels observed in untouched primary forests. That’ s the conclusion of a study<\/a> carried out by a team of researchers led by microbiologists Klaus N\u00fcsslein and Marie Kroeger<\/strong> of the University of Massachusetts Amherst. The analysis focused on the role of soil microbes<\/strong> and provided new scientific evidence for the benefit of reforestation strategies in mitigating climate change.<\/p>\n

Areas of deforestation release more methane<\/h5>\n

“A signi\ufb01cant increase in the abundance and activity of methanogens in pasture soils could drive increased soil methane emissions,” the authors explained in a paper<\/a> published in the International Society of Microbial Ecology Journal. At the same time, areas of reforestation<\/strong>, the so called Secondary rainforests<\/strong>, “had decreased methanogenic activity similar to primary rainforests”. According to Kroeger and N\u00fcsslein, the \ufb01ndings show secondary forests’ potential “to recover as methane sinks” and their tendency “to offset greenhouse gas emissions<\/strong> in the tropics.”<\/p>\n

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Land suffering from deforestation is more likely to emit methane. Chart: Comparative richness of active methane-cycling taxa (methanotroph or methanogen) from two geographic locations (Par\u00e1 or Rond\u00f4nia), three land-use types (primary rainforest = green, pasture = orange, and secondary rainforest = blue) incubated with one of three substrates (methane, carbon dioxide, and sodium acetate). Source: The ISME Journal (2021), “Rainforest-to-pasture conversion stimulates soil methanogenesis across the Brazilian Amazon”<\/a>,\u00a0Published online: 20 October 2020 \u00a9 The Author(s) 2020. This article is published with open access<\/p><\/div>\n

Microbes have a crucial role<\/h5>\n

Laboratory tests were conducted on soil samples<\/strong> collected in a large area subject to deforestation. These trials showed the key role played by microbes which are also notoriously influential in shaping soil characteristics<\/a>. The investigation in the northeast and southwest Amazon, in the states of Par\u00e1 and Rond\u00f4nia, was based on metagenomic DNA sequencing<\/strong> “to identify microorganisms actively involved in producing and consuming methane”. A strong presence of these microbes<\/strong> in pasture soils was detected in all the observed sites.<\/p>\n

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Food safety: the solution lies in soil microbes<\/a><\/p><\/blockquote>\n