A meta-analysis of experimental warming effects on terrestrial nitrogen pools and dynamics

被引：507

作者：

Bai, Edith ^{[1
]}

Li, Shanlong ^{[1
,2
]}

Xu, Wenhua ^{[1
]}

Li, Wei ^{[1
]}

Dai, Weiwei ^{[1
]}

Jiang, Ping ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110164, Peoples R China

[2] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China

来源：

NEW PHYTOLOGIST | 2013年 / 199卷 / 02期

关键词：

increased temperature; mineralization; N cycling processes; nitrification; nitrogen fluxes; CONIFER FOREST SOILS; ELEVATED CO2; CLIMATE-CHANGE; PHOTOSYNTHETIC CAPACITY; MICROBIAL RESPIRATION; TEMPERATURE RESPONSES; COMMUNITY COMPOSITION; NUTRIENT-UPTAKE; CARBON-DIOXIDE; PLANT-GROWTH;

D O I：

10.1111/nph.12252

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Global warming may have profound effects on terrestrial ecosystems. However, a comprehensive evaluation of the effects of warming on ecosystem nitrogen (N) pools and dynamics is not available. Here, we compiled data of 528 observations from 51 papers and carried out a meta-analysis of experimental warming effects on 13 variables related to terrestrial N pools and dynamics. We found that, on average, net N mineralization and net nitrification rate were increased by 52.2 and 32.2%, respectively, under experimental warming treatment. N pools were also increased by warming, although the magnitude of this increase was less than that of N fluxes. Soil microbial N and N immobilization were not changed by warming, probably because microbes are limited by carbon sources. Grassland and shrubland/heathland were less responsive to warming than forest, probably because the reduction of soil moisture by warming offset the temperature effect in these areas. Soil heating cable and all-day treatment appeared to be the most effective method on N cycling among all treatment methods. Results of this meta-analysis are useful for better understanding the response of N cycling to global warming and the underlying mechanism of warming effects on plants and ecosystem functions.

引用

页码：441 / 451

页数：11

共 85 条

[1] Appropriate experimental ecosystem warming methods by ecosystem, objective, and practicality [J].