How climate and soil properties affect the abundances of nitrogen-cycling genes in nitrogen-treated ecosystems: a meta-analysis,Plant and Soil

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How climate and soil properties affect the abundances of nitrogen-cycling genes in nitrogen-treated ecosystems: a meta-analysis
Plant and Soil ( IF 3.9 ) Pub Date : 2022-04-14 , DOI: 10.1007/s11104-022-05420-6
Jingyi Dong ₁ , Jiaqi Zhang ₁ , Yinghui Liu ₁ , Haichao Jing ₁

Affiliation

Purpose

The abundance of nitrogen (N)-cycling genes is frequently used to indicate N cycling and predict N₂O emissions. However, it remains difficult to clearly define how soil N-cycling genes in different ecosystems respond to anthropogenic N additions.

Methods

We applied a meta-analysis approach to examine data about N-cycling genes (nifH, ammonia-oxidizing archaea (AOA), ammonia-oxidizing bacteria (AOB), nirK, nirS, and nosZ) in different ecosystems from 119 peer-reviewed articles.

Results

In the ecosystems examined, the patterns of change in the abundances of the target genes, apart from AOA, varied considerably. This variation reflects the distinctive soil characteristics of ecosystems that develop when different forms of N are applied at different rates and over different durations. The nifH abundance decreased significantly, by 32.79%, in forests but did not change in grasslands and croplands. The AOB abundance increased in all three ecosystems, by 193.06% in grasslands, 73.26% in forests, and 151.86% in croplands, respectively. The denitrification gene abundances, namely the nirK, nirS, and nosZ, in croplands also increased significantly, by 60.74%, 47.42%, and 69.54%, respectively.

Conclusion

In general, climate factors and long-term applications of organic N at high rates had significant effects on the gene abundances in different ecosystems, through their influence on soil properties. An enhanced understanding of how N additions influence the abundance of other N-cycling functional genes can help us improve our ability to model the populations and activities of microbial functional communities and predict N fluxes.

中文翻译：

气候和土壤特性如何影响氮处理生态系统中氮循环基因的丰度：荟萃分析

目的

氮 (N) 循环基因的丰度经常用于指示 N 循环和预测 N ₂ O 排放。然而，仍然很难明确定义不同生态系统中的土壤氮循环基因如何响应人为氮的添加。

方法

我们应用荟萃分析方法检查来自 119 篇同行评审文章的不同生态系统中N 循环基因（ nifH、氨氧化古菌 (AOA)、氨氧化细菌 (AOB)、nirK、nirS和nosZ）的数据.

结果

在所检查的生态系统中，除 AOA 外，靶基因丰度的变化模式差异很大。这种变化反映了当以不同的速率和不同的持续时间施用不同形式的氮时，生态系统的独特土壤特征。森林中的nifH丰度显着下降了 32.79%，但草地和农田没有变化。三个生态系统的 AOB 丰度均增加，草地增加 193.06%，森林增加 73.26%，农田增加 151.86%。农田反硝化基因nirK、nirS和nosZ的丰度也显着增加，分别增加了60.74%、47.42%和69.54%。