Scholarlink

<p>While phosphorus (P) enrichment is a well-recognized driver of eutrophication in freshwater ecosystems, the effect of phosphorus enrichment on viral communities and functions remains poorly understood. Here we conducted microcosm experiments manipulating P availability using water from an oligotrophic plateau lake, integrating amplicon sequencing/viromics and direct experimentation. The results reveal that P enrichment induces niche partitioning in prokaryotic communities, favoring copiotrophic taxa such as <i>Cyanobacteria</i> while maintaining α-diversity. Concurrently, viral communities exhibited β-diversity shifts, with specific lineages (e.g., <i>Tequatrovirus, Lambdavirus</i>) enriched and several P-related auxiliary metabolic genes (AMGs, <i>purL, phnO</i> and <i>pyrE</i>) involved in purine/pyrimidine metabolism and phosphonate utilization were identified bioinformatically in P-enriched viral metagenomes. Furthermore, viral-host interaction networks structure was changed, with cyanobacteria and Alphaproteobacteria emerging as crucial taxa. Notably, viral AMGs may accelerate P turnover rates, driven by viral-mediated production of labile organic phosphorus compounds. These findings bridge viral ecology and eutrophication science by demonstrating that viral AMGs act as metabolic catalysts, amplifying P cycling under nutrient stress. This work underscores the necessity of integrating viral processes into predictive models of eutrophication and identifies viral AMGs as potential early-warning indicators for mitigating P-driven cyanobacterial blooms and restoring ecosystem balance.</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

Phosphorus Enrichment Rewires Viral-Mediated Phosphorus Cycling in Freshwater Ecosystems via Auxiliary Metabolic Genes

  • 期刊论文

  • 发表日期：

    2026年3月13日

查看全文
  • Raoqiong Che,
  • Shiying Zhang,
  • Hao Yi,
  • Jun Li,
  • Kaixin Diao,
  • Xiaolong Cui,
  • Hongchen Jiang,
  • Wei Xiao

摘要

While phosphorus (P) enrichment is a well-recognized driver of eutrophication in freshwater ecosystems, the effect of phosphorus enrichment on viral communities and functions remains poorly understood. Here we conducted microcosm experiments manipulating P availability using water from an oligotrophic plateau lake, integrating amplicon sequencing/viromics and direct experimentation. The results reveal that P enrichment induces niche partitioning in prokaryotic communities, favoring copiotrophic taxa such as Cyanobacteria while maintaining α-diversity. Concurrently, viral communities exhibited β-diversity shifts, with specific lineages (e.g., Tequatrovirus, Lambdavirus) enriched and several P-related auxiliary metabolic genes (AMGs, purL, phnO and pyrE) involved in purine/pyrimidine metabolism and phosphonate utilization were identified bioinformatically in P-enriched viral metagenomes. Furthermore, viral-host interaction networks structure was changed, with cyanobacteria and Alphaproteobacteria emerging as crucial taxa. Notably, viral AMGs may accelerate P turnover rates, driven by viral-mediated production of labile organic phosphorus compounds. These findings bridge viral ecology and eutrophication science by demonstrating that viral AMGs act as metabolic catalysts, amplifying P cycling under nutrient stress. This work underscores the necessity of integrating viral processes into predictive models of eutrophication and identifies viral AMGs as potential early-warning indicators for mitigating P-driven cyanobacterial blooms and restoring ecosystem balance.