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Purpose <p>The forest-steppe ecotone contains diverse landcover types and edge effects. However, whether the specific features in the ecotone would result in different patterns of soil elemental distribution owning to diverse plant community types is still poorly understood.</p> Methods <p>We investigated changes in soil total carbon (TC), total nitrogen (TN), available phosphorus (AP), iron (Fe), manganese (Mn), copper (Cu), zinc (Zn), exchangeable calcium (Ca<sup>2+</sup>), magnesium (Mg<sup>2+</sup>), potassium (K<sup>+</sup>), and sodium (Na<sup>+</sup>) along a transect from the canopy forest (CF) to meadow steppe (MS).</p> Results <p>Our study showed that soil TC, TN, AP, Fe, and Mn at the junction of forest and grassland (JFG) were increased by 34.3%, 31.3%, 24.6%, 18.2%, and 20.6% compared to CF, and increased by 53.6%, 46.1%, 74.6%, 77.6%, 34.1% compared to MS, respectively. The soil at JFG contained less exchangeable Ca<sup>2+</sup>, Mg<sup>2+</sup> than that at CF and MS. We found that variations in soil elements across landcover types are influenced by plant community type, soil microbial diversity, soil pH, mean annual temperature (MAT), and mean annual precipitation (MAP). Soil pH exerted a significant effect on soil carbon and mineral element contents.</p> Conclusion <p>Overall soil carbon and mineral elements are most variable and susceptible to changes in biotic and environmental factors at JFG. Our findings highlight the importance of landcover heterogeneity and vegetation type variation in shaping the spatial patterns of soil carbon and mineral nutrients across the broad landscape in forest-steppe ecotone.</p>

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Susceptibility of Soil Elements to Biotic and Abiotic Factors in a Forest-Steppe Ecotone

  • 期刊论文

  • 发表日期：

    2025年1月3日

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  • Qiuhua Li,
  • Jiayun Zhang,
  • Chunbo Li,
  • Hong Ji,
  • Xiaomeng Ma,
  • Peng He,
  • Lixin Yu,
  • Mengfan Zhou,
  • Ning Dang,
  • Jishuai Su,
  • Ruzhen Wang,
  • Heyong Liu,
  • Yong Jiang

摘要

Purpose

The forest-steppe ecotone contains diverse landcover types and edge effects. However, whether the specific features in the ecotone would result in different patterns of soil elemental distribution owning to diverse plant community types is still poorly understood.

Methods

We investigated changes in soil total carbon (TC), total nitrogen (TN), available phosphorus (AP), iron (Fe), manganese (Mn), copper (Cu), zinc (Zn), exchangeable calcium (Ca2+), magnesium (Mg2+), potassium (K+), and sodium (Na+) along a transect from the canopy forest (CF) to meadow steppe (MS).

Results

Our study showed that soil TC, TN, AP, Fe, and Mn at the junction of forest and grassland (JFG) were increased by 34.3%, 31.3%, 24.6%, 18.2%, and 20.6% compared to CF, and increased by 53.6%, 46.1%, 74.6%, 77.6%, 34.1% compared to MS, respectively. The soil at JFG contained less exchangeable Ca2+, Mg2+ than that at CF and MS. We found that variations in soil elements across landcover types are influenced by plant community type, soil microbial diversity, soil pH, mean annual temperature (MAT), and mean annual precipitation (MAP). Soil pH exerted a significant effect on soil carbon and mineral element contents.

Conclusion

Overall soil carbon and mineral elements are most variable and susceptible to changes in biotic and environmental factors at JFG. Our findings highlight the importance of landcover heterogeneity and vegetation type variation in shaping the spatial patterns of soil carbon and mineral nutrients across the broad landscape in forest-steppe ecotone.