Global soil nitrogen cycle pattern and nitrogen enrichment effects: Tropical versus subtropical forests

热带和亚热带湿润阔叶林 亚热带 氮气循环 硝化作用 氮气 淤泥 硝酸盐 环境科学 环境化学 农学 生态学 化学 生物 古生物学 有机化学
作者
Ahmed S. Elrys,Qilin Zhu,Chunlan Jiang,Juan Liu,Hamida H.H. Sobhy,Qunli Shen,Yves Uwiragiye,Yanzheng Wu,Khaled A. El‐Tarabily,Lei Meng,Christoph Müller,Jinbo Zhang
出处
期刊:Global Change Biology [Wiley]
卷期号:29 (7): 1905-1921 被引量:21
标识
DOI:10.1111/gcb.16603
摘要

Abstract Tropical and subtropical forest biomes are a main hotspot for the global nitrogen (N) cycle. Yet, our understanding of global soil N cycle patterns and drivers and their response to N deposition in these biomes remains elusive. By a meta‐analysis of 2426‐single and 161‐paired observations from 89 published 15 N pool dilution and tracing studies, we found that gross N mineralization (GNM), immobilization of ammonium () and nitrate (), and dissimilatory nitrate reduction to ammonium (DNRA) were significantly higher in tropical forests than in subtropical forests. Soil N cycle was conservative in tropical forests with ratios of gross nitrification (GN) to (GN/) and of soil nitrate to ammonium (NO 3 − /NH 4 + ) less than one, but was leaky in subtropical forests with GN/ and NO 3 − /NH 4 + higher than one. Soil NH 4 + dynamics were mainly controlled by soil substrate (e.g., total N), but climatic factors (e.g., precipitation and/or temperature) were more important in controlling soil NO 3 − dynamics. Soil texture played a role, as GNM and were positively correlated with silt and clay contents, while and DNRA were positively correlated with sand and clay contents, respectively. The soil N cycle was more sensitive to N deposition in tropical forests than in subtropical forests. Nitrogen deposition leads to a leaky N cycle in tropical forests, as evidenced by the increase in GN/, NO 3 − /NH 4 + , and nitrous oxide emissions and the decrease in and DNRA, mainly due to the decrease in soil microbial biomass and pH. Dominant tree species can also influence soil N cycle pattern, which has changed from conservative in deciduous forests to leaky in coniferous forests. We provide global evidence that tropical, but not subtropical, forests are characterized by soil N dynamics sustaining N availability and that N deposition inhibits soil N retention and stimulates N losses in these biomes.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
拾光完成签到,获得积分10
1秒前
long完成签到 ,获得积分10
1秒前
天天向上发布了新的文献求助10
2秒前
6260完成签到,获得积分10
2秒前
pcr163应助linhanwenzhou采纳,获得50
3秒前
3秒前
酷酷元风完成签到,获得积分10
4秒前
5秒前
天才幸运鱼完成签到,获得积分10
5秒前
6秒前
6秒前
粥游天下完成签到,获得积分10
7秒前
jcc完成签到,获得积分10
7秒前
哈哈哈哈完成签到,获得积分10
7秒前
lighthouse完成签到,获得积分10
8秒前
平凡中的限量版完成签到,获得积分10
8秒前
大伟完成签到,获得积分10
8秒前
long关注了科研通微信公众号
9秒前
懵懂的毛豆完成签到,获得积分10
9秒前
zzcherished发布了新的文献求助10
9秒前
zyq发布了新的文献求助10
9秒前
我是老大应助哦哦哦采纳,获得10
10秒前
YHY完成签到,获得积分10
10秒前
10秒前
天天呼的海角完成签到,获得积分10
13秒前
量子星尘发布了新的文献求助10
16秒前
16秒前
16秒前
jiangcai完成签到,获得积分10
17秒前
Cherry完成签到,获得积分10
19秒前
正能量的可可可完成签到,获得积分10
19秒前
tuo zhang发布了新的文献求助10
22秒前
草莓养乐多完成签到 ,获得积分10
22秒前
糊涂完成签到,获得积分10
22秒前
哦哦哦发布了新的文献求助10
22秒前
in完成签到 ,获得积分10
23秒前
pilot完成签到,获得积分10
25秒前
劣根完成签到,获得积分10
26秒前
Liang发布了新的文献求助20
26秒前
28秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038368
求助须知:如何正确求助?哪些是违规求助? 3576068
关于积分的说明 11374313
捐赠科研通 3305780
什么是DOI,文献DOI怎么找? 1819322
邀请新用户注册赠送积分活动 892672
科研通“疑难数据库(出版商)”最低求助积分说明 815029