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<p>Parkland agroforestry plays an important role in biodiversity conservation and climate change mitigation. However, this role varies by agroecological zone. This study aimed to (i) assess woody species and soil macrofauna diversity, and (ii) quantify soil organic carbon (SOC) stocks in parkland agroforestry practices of Gubalafto Woreda, North Wollo, Ethiopia. We also explored the relationship between diversity and SOC. The agroecological zone was stratified into midland and lowland. Purposively four Kebeles were selected from both agroecological zones that practice parkland agroforestry. An inventory of scattered trees on farmland was conducted on randomly selected 51 (50 × 100&#xa0;m) rectangular plots. For SOC determination, at each rectangular plot a soil sample was taken at 0–15&#xa0;cm and 15–30&#xa0;cm soil depth. In each soil sampling plot, a wood frame of 25 × 25 × 30&#xa0;cm was used to sample soil macrofauna diversity. The results revealed that the parklands of Gubalafto have a total of 16 woody species belonging to 9 families and to 7 families of macrofauna. The diversity of woody species differed significantly (<i>p</i> &lt; 0.05) between the two agroecological zones: lowland had greater woody species diversity than midland, but the midland had greater soil macrofauna diversity. The mean SOC stocks differed significantly (<i>p</i> = 0.002) between the midland agroecological zone (29.42&#xa0;Mg C ha⁻<sup>1</sup>) and the lowland agroecological zone (23.99&#xa0;Mg C ha⁻<sup>1</sup>). This variation likely reflects elevation driven differences in microclimate and decomposition rates rather than tree diversity, as no significant relationship was found between diversity indices and SOC in either agroecological zone. Instead, species identity (e.g., litter quality or high-biomass trees) and farm management practices may have a stronger influence on SOC accumulation. This study concludes that parkland agroforestry has the potential for biodiversity conservation and climate change mitigation, so existing practices should be maintained and promoted.</p>

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Diversity of woody species, soil macrofauna, and soil organic carbon stock in parkland agroforestry of Gubalafto Woreda, Amhara, Ethiopia

  • 期刊论文

  • 发表日期：

    2025年11月20日

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  • Semaigzer Ayalew,
  • Seid Muhie Dawud

摘要

Parkland agroforestry plays an important role in biodiversity conservation and climate change mitigation. However, this role varies by agroecological zone. This study aimed to (i) assess woody species and soil macrofauna diversity, and (ii) quantify soil organic carbon (SOC) stocks in parkland agroforestry practices of Gubalafto Woreda, North Wollo, Ethiopia. We also explored the relationship between diversity and SOC. The agroecological zone was stratified into midland and lowland. Purposively four Kebeles were selected from both agroecological zones that practice parkland agroforestry. An inventory of scattered trees on farmland was conducted on randomly selected 51 (50 × 100 m) rectangular plots. For SOC determination, at each rectangular plot a soil sample was taken at 0–15 cm and 15–30 cm soil depth. In each soil sampling plot, a wood frame of 25 × 25 × 30 cm was used to sample soil macrofauna diversity. The results revealed that the parklands of Gubalafto have a total of 16 woody species belonging to 9 families and to 7 families of macrofauna. The diversity of woody species differed significantly (p < 0.05) between the two agroecological zones: lowland had greater woody species diversity than midland, but the midland had greater soil macrofauna diversity. The mean SOC stocks differed significantly (p = 0.002) between the midland agroecological zone (29.42 Mg C ha⁻1) and the lowland agroecological zone (23.99 Mg C ha⁻1). This variation likely reflects elevation driven differences in microclimate and decomposition rates rather than tree diversity, as no significant relationship was found between diversity indices and SOC in either agroecological zone. Instead, species identity (e.g., litter quality or high-biomass trees) and farm management practices may have a stronger influence on SOC accumulation. This study concludes that parkland agroforestry has the potential for biodiversity conservation and climate change mitigation, so existing practices should be maintained and promoted.