Scholarlink

<p>Ammonia-oxidizing archaea (AOA) and bacteria (AOB) are abundant in the global ocean, playing a crucial role in marine nitrogen cycling through nitrification. Despite extensive studies using the ammonia monooxygenase α-subunit (<i>amoA</i>) gene, our understanding of their distribution patterns in marine habitats remains limited. This study offers the first integrative framework to assess the diversity and biogeography of ammonia-oxidizing communities across different marine habitats, based on a meta-analysis and phylogenetic examination of archaeal and bacterial <i>amoA</i> sequences from public databases. Most sequences were retrieved from estuarine sediments and coastal waters, while habitats such as pelagic open ocean, OMZ, deep sea, hydrothermal vents, and benthic organisms are underexplored. AOA exhibited higher phylogenetic diversity than AOB, with many unclassified AOA-<i>amoA</i> sequences likely representing novel clades. The dominant AOA clades were <i>Ca.</i> Nitrosopelagicus, <i>Nitrosoarchaeum,</i> and <i>Nitrosopumilus</i>, while <i>Nitrosospira</i> was the predominant clade among AOB. AOA show greater ecological versatility, thriving in nutrient-poor and low-oxygen environments, whereas AOB are more prevalent in nutrient-rich estuarine habitats. Further research is needed to better understand the ecological roles of novel AOA clades and the contributions of AOB in less-explored marine habitats.</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

Phylogenetic diversity and distribution patterns of ammonia-oxidizing microorganisms in marine environments

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年4月28日

查看全文
  • Silvia Pajares,
  • María del Carmen Pelayo

摘要

Ammonia-oxidizing archaea (AOA) and bacteria (AOB) are abundant in the global ocean, playing a crucial role in marine nitrogen cycling through nitrification. Despite extensive studies using the ammonia monooxygenase α-subunit (amoA) gene, our understanding of their distribution patterns in marine habitats remains limited. This study offers the first integrative framework to assess the diversity and biogeography of ammonia-oxidizing communities across different marine habitats, based on a meta-analysis and phylogenetic examination of archaeal and bacterial amoA sequences from public databases. Most sequences were retrieved from estuarine sediments and coastal waters, while habitats such as pelagic open ocean, OMZ, deep sea, hydrothermal vents, and benthic organisms are underexplored. AOA exhibited higher phylogenetic diversity than AOB, with many unclassified AOA-amoA sequences likely representing novel clades. The dominant AOA clades were Ca. Nitrosopelagicus, Nitrosoarchaeum, and Nitrosopumilus, while Nitrosospira was the predominant clade among AOB. AOA show greater ecological versatility, thriving in nutrient-poor and low-oxygen environments, whereas AOB are more prevalent in nutrient-rich estuarine habitats. Further research is needed to better understand the ecological roles of novel AOA clades and the contributions of AOB in less-explored marine habitats.