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<p>Forests play a vital role in maintaining the global carbon cycle. Ethiopian forests are passing through various natural and human disturbances. The objective of the study was to assess the effect of anthropogenic disturbances on total biomass carbon stocks and to assess the relationship between soil physio-chemical properties and total biomass carbon stocks. The Ziba forest (disturbed) and the Anshirava forest (undisturbed) were purposefully chosen from dry evergreen forests, based on their management level. Eight transect lines in Ziba and seventeen in Anshirava were established, and 20&#xa0;m&#xa0;×&#xa0;20&#xa0;m sample quadrats at 200&#xa0;m intervals along each transect line were laid. Due to the terrain and vegetation variations, nested quadrats were designed, resulting in 48 major quadrats in Ziba and 58 in Anshirava. Carbon stock was estimated following standard inventory procedures, together with soil sampling for physicochemical analysis. Pearson's correlation test and one-way ANOVA were used. Ziba confronted more substantial disturbances than Anshirava forest, with a significant negative correlation with TBCS. Anshirava forest revealed a significantly higher TBCS (226.75&#xa0;Mg&#xa0;ha⁻<sup>1</sup>) than Ziba (140.50&#xa0;Mg&#xa0;ha⁻<sup>1</sup>). The correlation test showed a significant positive relationship between SCS and TBCS in both forests. In Anshirava, TN and BD revealed significant positive and negative correlations with TBCS, respectively. Whereas, in the Ziba forest, except for SCS, the remaining parameters were not correlated significantly. The study inferred that estimating carbon and its relation with soil properties in highly encroached forests is challenging due to disrupted nutrient dynamics. However, in undisturbed forests, it can significantly determine the overall quality of the forest soil. Therefore, selective logging and community-managed timber harvesting plans are required to maintain the forest's integrity. Moreover, rotational grazing systems, introducing fodder production programs and using genetically improved livestock breeds are required to reduce reliance on forest grazing. </p>

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Biomass carbon stock dynamics: effects of disturbances and consequences for soil properties in the dry evergreen Afromontane forests of the Choke Mountain ecosystem, Ethiopia

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月10日

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  • Fikirte Asrat Gelaw,
  • Teshome Soromessa,
  • Semegnew Tadese Feyisa,
  • Getaneh Gebeyehu,
  • Meaza Kassahun Zegeye,
  • Mehari Girmay

摘要

Forests play a vital role in maintaining the global carbon cycle. Ethiopian forests are passing through various natural and human disturbances. The objective of the study was to assess the effect of anthropogenic disturbances on total biomass carbon stocks and to assess the relationship between soil physio-chemical properties and total biomass carbon stocks. The Ziba forest (disturbed) and the Anshirava forest (undisturbed) were purposefully chosen from dry evergreen forests, based on their management level. Eight transect lines in Ziba and seventeen in Anshirava were established, and 20 m × 20 m sample quadrats at 200 m intervals along each transect line were laid. Due to the terrain and vegetation variations, nested quadrats were designed, resulting in 48 major quadrats in Ziba and 58 in Anshirava. Carbon stock was estimated following standard inventory procedures, together with soil sampling for physicochemical analysis. Pearson's correlation test and one-way ANOVA were used. Ziba confronted more substantial disturbances than Anshirava forest, with a significant negative correlation with TBCS. Anshirava forest revealed a significantly higher TBCS (226.75 Mg ha⁻1) than Ziba (140.50 Mg ha⁻1). The correlation test showed a significant positive relationship between SCS and TBCS in both forests. In Anshirava, TN and BD revealed significant positive and negative correlations with TBCS, respectively. Whereas, in the Ziba forest, except for SCS, the remaining parameters were not correlated significantly. The study inferred that estimating carbon and its relation with soil properties in highly encroached forests is challenging due to disrupted nutrient dynamics. However, in undisturbed forests, it can significantly determine the overall quality of the forest soil. Therefore, selective logging and community-managed timber harvesting plans are required to maintain the forest's integrity. Moreover, rotational grazing systems, introducing fodder production programs and using genetically improved livestock breeds are required to reduce reliance on forest grazing.