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<p>A study was conducted in natural forests of Tripura, sought to understand the impact of different canopy densities on soil characteristics and carbon storage. The forests were categorized into very dense forest (VDF), moderately dense forest (MDF), and open forest (OF), based on their canopy coverage. The soil samples were collected from 0–15&#xa0;cm, 15–30&#xa0;cm, and 30–45&#xa0;cm of soil depth, and analyzed for various parameters such as pH, moisture content, bulk density, organic carbon, nitrogen concentration, and organic matter. The findings revealed a critical influence of soil depth on all parameters across the canopy densities. Soil pH varied from 5.33 to 5.76, with the highest acidity at the surface layer of VDF and the lowest in the deepest layer of OF. VDF showed substantially higher moisture content, ranging from 21.24 to 23.23%, compared to the other forest canopy density types. Bulk density values across the study fluctuated between 1.29 and 1.88&#xa0;g&#xa0;cm<sup>−3</sup>. Organic carbon content differed notably with depth, peaking at 1.98% in the MDF at 15–30&#xa0;cm and dropping to 0.61% in OF at 30–45&#xa0;cm depth. VDF had the richest organic matter content at 5.20% in the topsoil. Nitrogen content was found to be highest in the upper and middle soil layers of all forest categories, with MDF recording the maximum soil organic carbon stocks (67.69&#xa0;Mg&#xa0;ha<sup>−1</sup>) at the shallowest depth, while OF had the lowest (31.73&#xa0;Mg&#xa0;ha<sup>−1</sup>) in the deepest sampled layer. Labile carbon pools like very labile carbon and less labile carbon were recorded higher in VDF, except for the non-labile carbon pool, which was highest in OF. Both active carbon (AC) and passive carbon (PC) pools displayed significant variations depending on canopy types and soil depth, both decreasing with increasing depth. This study underscores the intricate relationship between forest canopy density and soil properties, which has implications for sustainable forest management, carbon sequestration and climate change mitigation strategies.</p>

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Fluctuation of soil organic carbon storage along the canopy density gradients of different natural forests in Tripura

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Dipankar Deb,
  • Kanika Tripura,
  • Sourabh Deb,
  • Badal Kumar Datta

摘要

A study was conducted in natural forests of Tripura, sought to understand the impact of different canopy densities on soil characteristics and carbon storage. The forests were categorized into very dense forest (VDF), moderately dense forest (MDF), and open forest (OF), based on their canopy coverage. The soil samples were collected from 0–15 cm, 15–30 cm, and 30–45 cm of soil depth, and analyzed for various parameters such as pH, moisture content, bulk density, organic carbon, nitrogen concentration, and organic matter. The findings revealed a critical influence of soil depth on all parameters across the canopy densities. Soil pH varied from 5.33 to 5.76, with the highest acidity at the surface layer of VDF and the lowest in the deepest layer of OF. VDF showed substantially higher moisture content, ranging from 21.24 to 23.23%, compared to the other forest canopy density types. Bulk density values across the study fluctuated between 1.29 and 1.88 g cm−3. Organic carbon content differed notably with depth, peaking at 1.98% in the MDF at 15–30 cm and dropping to 0.61% in OF at 30–45 cm depth. VDF had the richest organic matter content at 5.20% in the topsoil. Nitrogen content was found to be highest in the upper and middle soil layers of all forest categories, with MDF recording the maximum soil organic carbon stocks (67.69 Mg ha−1) at the shallowest depth, while OF had the lowest (31.73 Mg ha−1) in the deepest sampled layer. Labile carbon pools like very labile carbon and less labile carbon were recorded higher in VDF, except for the non-labile carbon pool, which was highest in OF. Both active carbon (AC) and passive carbon (PC) pools displayed significant variations depending on canopy types and soil depth, both decreasing with increasing depth. This study underscores the intricate relationship between forest canopy density and soil properties, which has implications for sustainable forest management, carbon sequestration and climate change mitigation strategies.