{"id":42418,"date":"2026-02-20T11:00:05","date_gmt":"2026-02-20T10:00:05","guid":{"rendered":"https:\/\/resoilfoundation.org\/articles\/carbonio-foreste-naturali-rigenerazione-artificiale\/"},"modified":"2026-02-20T16:32:49","modified_gmt":"2026-02-20T15:32:49","slug":"carbon-natural-forest-regeneration","status":"publish","type":"post","link":"https:\/\/resoilfoundation.org\/en\/environment\/carbon-natural-forest-regeneration\/","title":{"rendered":"Natural forests beat artificial regeneration in carbon sequestration"},"content":{"rendered":"<h2>In intact forests, soil carbon levels are significantly higher than in areas being restored by tree planting, where higher soil acidity reduces sequestration capacity<\/h2>\n<p style=\"text-align: center;\">by Matteo Cavallito<\/p>\n<p>Forests are known to be an extraordinary <strong>sink of organic carbon<\/strong>, which is why their restoration has always been an important climate mitigation strategy. However, the carbon sequestration capacity of forest soil looks highly variable, with <strong>significantly higher values<\/strong> in intact areas compared to those artificially restored by planting new trees. This is supported by an international <a href=\"https:\/\/journals.plos.org\/plosone\/article?id=10.1371\/journal.pone.0342399\" target=\"_blank\" rel=\"noopener\">research<\/a> conducted in <strong>Kerala<\/strong>, in southwestern India. The study, which involved local researchers from the Kerala Forest Research Institute (KFRI), the Forest Research Institute (FRI), and Cochin University of Science and Technology (CUSAT) together with their US colleagues from Purdue University, was published in the journal PLoS One.<\/p>\n<div class='avia-iframe-wrap'>\n<blockquote class=\"wp-embedded-content\" data-secret=\"VL67YVVsRZ\"><p><a href=\"https:\/\/resoilfoundation.org\/en\/articles\/australia-forests-natural-regeneration\/\">In Australia&#8217;s logged forests natural regeneration is not enough<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;In Australia&#8217;s logged forests natural regeneration is not enough&#8221; &#8212; Re Soil Foundation\" src=\"https:\/\/resoilfoundation.org\/en\/articles\/australia-forests-natural-regeneration\/embed\/#?secret=XlhEy7SrqZ#?secret=VL67YVVsRZ\" data-secret=\"VL67YVVsRZ\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/div>\n<h5>Higher carbon concentrations in natural forests<\/h5>\n<p>During the research, the authors <a href=\"https:\/\/researchmatters.in\/news\/natural-forests-store-significantly-more-soil-carbon-artificial-plantations-shows-study\" target=\"_blank\" rel=\"noopener\">explain<\/a>, random stratified sampling was used in five ecological zones in the area. Here, scientists collected <strong>soil samples<\/strong> from four distinct layers up to a depth of 1 meter. By analyzing their carbon content, acidity, and structure, the researchers reconstructed a three-dimensional map of carbon sequestration patterns.<\/p>\n<blockquote><p>When a diverse natural forest is cleared to make way for a single-species plantation, such as <strong>teak<\/strong>, they explain, the <strong>complex biological processes<\/strong> that regulate carbon capture are typically <strong>compromised<\/strong>.<\/p><\/blockquote>\n<p>The result, the study points out, is that \u201c<strong>natural forests<\/strong> maintain substantially higher average SOC concentrations (<strong>16.61\u2009g\/kg<\/strong>) than <strong>plantation<\/strong> forests <strong>(11.82\u2009g\/kg<\/strong>).\u201d Furthermore, in intact areas, more than 70% of the carbon is stored in the top 30 centimeters of soil.<\/p>\n<div id=\"attachment_42397\" style=\"width: 1810px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-42397\" class=\"size-full wp-image-42397\" src=\"https:\/\/resoilfoundation.org\/wp-content\/uploads\/2026\/02\/kerala-mappa.png\" alt=\"L\u2019indagine si \u00e8 svolta in cinque zone ecologiche del Kerala, nell\u2019India Meridionale. Fonte: Jaya P, Rui Y, Navya M, Sandeep S (2026) Soil organic carbon dynamics: Influences of land-use change in natural and plantation forests of the Western Ghats, India. PLoS One 21(2): e0342399. https:\/\/doi. org\/10.1371\/journal.pone.0342399. DEM based on Shuttle Radar Topography Mission (SRTM) 1 Arc-Second Global courtesy of the U.S. Geological Survey (https:\/\/doi.org\/10.5066\/F7PR7TFT) (https:\/\/earthexplorer.usgs.gov)\" width=\"1800\" height=\"1543\" srcset=\"https:\/\/resoilfoundation.org\/wp-content\/uploads\/2026\/02\/kerala-mappa.png 1800w, https:\/\/resoilfoundation.org\/wp-content\/uploads\/2026\/02\/kerala-mappa-300x257.png 300w, https:\/\/resoilfoundation.org\/wp-content\/uploads\/2026\/02\/kerala-mappa-1030x883.png 1030w, https:\/\/resoilfoundation.org\/wp-content\/uploads\/2026\/02\/kerala-mappa-768x658.png 768w, https:\/\/resoilfoundation.org\/wp-content\/uploads\/2026\/02\/kerala-mappa-1536x1317.png 1536w, https:\/\/resoilfoundation.org\/wp-content\/uploads\/2026\/02\/kerala-mappa-1500x1286.png 1500w, https:\/\/resoilfoundation.org\/wp-content\/uploads\/2026\/02\/kerala-mappa-705x604.png 705w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><p id=\"caption-attachment-42397\" class=\"wp-caption-text\">The survey was conducted in five ecological zones of Kerala, in southern India. Source: Jaya P, Rui Y, Navya M, Sandeep S (2026) Soil organic carbon dynamics: Influences of land-use change in natural and plantation forests of the Western Ghats, India. PLoS One 21(2): e0342399. https:\/\/doi. org\/10.1371\/journal.pone.0342399. DEM based on Shuttle Radar Topography Mission (SRTM) 1 Arc-Second Global courtesy of the U.S. Geological Survey (https:\/\/doi.org\/10.5066\/F7PR7TFT) (https:\/\/earthexplorer.usgs.gov)<\/p><\/div>\n<h5>Soil acidity is a key factor<\/h5>\n<p>Several factors contribute to this gap in favor of natural areas. These include the <strong>lower pH of plantation soils<\/strong>, which tend to become <strong>more acidic<\/strong> over time due to the way teak trees shed their leaves and soil management practices. This increased acidity makes it more difficult for the soil to retain the element.<\/p>\n<p>\u201cCorrelation analysis showed a <strong>significant negative relationship<\/strong> between soil organic carbon (SOC) and soil pH in natural forests, whereas plantation soils exhibited a positive relationship,\u201d the study says. \u201cForest soils also showed a positive correlation between SOC and <strong>clay<\/strong> content and a weak negative correlation with <strong>sand<\/strong> content.\u201d<\/p>\n<div class='avia-iframe-wrap'>\n<blockquote class=\"wp-embedded-content\" data-secret=\"863dmEcusu\"><p><a href=\"https:\/\/resoilfoundation.org\/en\/articles\/australia-forest-regeneration-co2\/\">Forest regeneration in Australia does not influence CO2 sequestration<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;Forest regeneration in Australia does not influence CO2 sequestration&#8221; &#8212; Re Soil Foundation\" src=\"https:\/\/resoilfoundation.org\/en\/articles\/australia-forest-regeneration-co2\/embed\/#?secret=BnEvU8xUkw#?secret=863dmEcusu\" data-secret=\"863dmEcusu\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/div>\n<h5>Longer growth cycles needed<\/h5>\n<p>One more really interesting aspect is a big exception the study has found. An older teak plantation that had been left alone for over 50 years, in fact, had high carbon levels. This suggests that better management and<strong> longer growth cycles<\/strong> for plantations could help <strong>close the gap<\/strong> in storage capacity.<\/p>\n<blockquote><p>In any case, the study highlights the<strong> limitations of reforestation practices<\/strong>, which are less effective in tackling <strong>climate change<\/strong> than natural forest protection.<\/p><\/blockquote>\n<p>\u201cLand use change from natural forest to plantation reduces soil organic carbon stocks, alters soil health, and diminishes the resilience of tropical soils to environmental change,\u201d the study concludes. For this reason, \u201cmaintaining and restoring natural forests\u2014both globally and in biodiversity hotspots is essential for maximizing soil carbon sequestration, supporting soil fertility, and achieving climate mitigation targets.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In intact forests, soil carbon levels are significantly higher than in areas being restored by tree planting, where higher soil acidity reduces sequestration capacity<\/p>\n","protected":false},"author":4,"featured_media":42421,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[144,134],"tags":[201,301,220,187,302,165,247,237,188,322],"class_list":["post-42418","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-environment","category-articles","tag-asia-en","tag-carbon-2-en","tag-carbon","tag-climate","tag-climate-2-en","tag-forests","tag-monitoraggio-en","tag-organic-matter","tag-research","tag-suolo-en"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Natural forests beat artificial regeneration in carbon sequestration<\/title>\n<meta name=\"description\" content=\"Natural forests store an average of 16.61 grams of carbon per kilogram of soil, compared to 11.82 grams in teak plantations\" \/>\n<meta name=\"robots\" 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