Scholarlink

Background and aims <p>Litter mixing effects (LME) during decomposition contribute greatly to material cycling in ecosystems, but they are strongly affected by nitrogen deposition. However, whether and how litter diversity affects the influence of nitrogen deposition on LMEs during natural vegetation succession remains unclear. We aim to clarify these issues and provide a scientific basis for maintaining nutrient cycling in ecosystems affected by nitrogen deposition.</p> Methods <p>All the possible litter mixtures of <i>Artemisia gmelinii</i> Weber ex Stechm., <i>Chrysanthemum indicum</i> L., and <i>Sophora davidii</i> (Franch.) Skeels, three common species in an abandoned shrub-grassland in the Loess Hilly Region, were used to simulate mixed litter decomposition on the surface of soil. The influence of nitrogen deposition on the LMEs of mixtures with different species (chemical) diversity was compared.</p> Results <p>Under natural conditions, litter mixtures with low and high species (or chemical) diversity had synergistic and antagonistic effects on litter decomposition, respectively (<i>P</i> &lt; 0.05). Under nitrogen deposition, the synergistic effects were weakened, whereas the antagonistic effects were enhanced (<i>P</i> &lt; 0.05). The adverse effects of nitrogen deposition decreased as chemical diversity increased, especially for chemical dispersion (<i>P</i> &lt; 0.05).</p> Conclusion <p>In the view of material cycling function of shrub-grassland ecosystems, maintaining high species diversity is beneficial for maintaining their long-term stability under nitrogen deposition.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Increasing litter diversity alleviates the negative effects of nitrogen deposition on litter mixing effects during decomposition: a case study of the shrub-grassland ecosystem on the Loess Plateau, China

  • 期刊论文

  • 发表日期：

    2026年2月12日

查看全文
  • Liping Li,
  • Qianyi Liang,
  • Yangfei Zhang,
  • Xiaoxi Zhang,
  • Xinde Fu,
  • Kaixuan Liu,
  • Lihong Wei

摘要

Background and aims

Litter mixing effects (LME) during decomposition contribute greatly to material cycling in ecosystems, but they are strongly affected by nitrogen deposition. However, whether and how litter diversity affects the influence of nitrogen deposition on LMEs during natural vegetation succession remains unclear. We aim to clarify these issues and provide a scientific basis for maintaining nutrient cycling in ecosystems affected by nitrogen deposition.

Methods

All the possible litter mixtures of Artemisia gmelinii Weber ex Stechm., Chrysanthemum indicum L., and Sophora davidii (Franch.) Skeels, three common species in an abandoned shrub-grassland in the Loess Hilly Region, were used to simulate mixed litter decomposition on the surface of soil. The influence of nitrogen deposition on the LMEs of mixtures with different species (chemical) diversity was compared.

Results

Under natural conditions, litter mixtures with low and high species (or chemical) diversity had synergistic and antagonistic effects on litter decomposition, respectively (P < 0.05). Under nitrogen deposition, the synergistic effects were weakened, whereas the antagonistic effects were enhanced (P < 0.05). The adverse effects of nitrogen deposition decreased as chemical diversity increased, especially for chemical dispersion (P < 0.05).

Conclusion

In the view of material cycling function of shrub-grassland ecosystems, maintaining high species diversity is beneficial for maintaining their long-term stability under nitrogen deposition.