Details

Autor(en) / Beteiligte

• Tian, Di
• Jiang, Lai
• Ma, Suhui
• Fang, Wenjing
• Schmid, Bernhard
• Xu, Longchao
• Zhu, Jianxiao
• Li, Peng
• Losapio, Gianalberto
• Jing, Xin
• Zheng, Chengyang
• Shen, Haihua
• Xu, Xiaoniu
• Zhu, Biao
• Fang, Jingyun

Titel

Effects of nitrogen deposition on soil microbial communities in temperate and subtropical forests in China

Ist Teil von

• The Science of the total environment, 2017-12, Vol.607-608, p.1367-1375

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2017

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• Increasing nitrogen (N) deposition has aroused large concerns because of its potential negative effects on forest ecosystems. Although microorganisms play a vital role in ecosystem carbon (C) and nutrient cycling, the effect of N deposition on soil microbiota still remains unclear. In this study, we investigated the responses of microbial biomass C (MBC) and N (MBN) and microbial community composition to 4–5years of experimentally simulated N deposition in temperate needle-leaf forests and subtropical evergreen broadleaf forests in eastern China, using chloroform fumigation extraction and phospholipid fatty acid (PLFA) methods. We found idiosyncratic effects of N addition on microbial biomass in these two types of forest ecosystems. In the subtropical forests, N addition showed a significant negative effect on microbial biomass and community composition, while the effect of N addition was not significant in the temperate forests. The N addition decreased MBC, MBN, arbuscular mycorrhizal fungi, and the F/B ratio (ratio of fungi to bacteria biomass) in the subtropical forests, likely due to a decreased soil pH and changes in the plant community composition. These results showed that microbial biomass and community composition in subtropical forests, compared with the temperate forests, were sensitive to N deposition. Our findings suggest that N deposition may have negative influence on soil microorganisms and potentially alter carbon and nutrient cycling in subtropical forests, rather than in temperate forests. [Display omitted] •Simulations of N deposition in natural subtropical and temperate forests are conducted.•Microbial community structures respond differently to N deposition in two forests.•N deposition may exhibit an overall negative influence on microorganisms in forests.