亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整的填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

Stoichiometric controls on carbon, nitrogen, and phosphorus dynamics in decomposing litter

矿化(土壤科学) 营养物 分解者 氮气 营养循环 植物凋落物 环境化学 化学 氮气循环 生态化学计量学 生态系统 生态学 生物 有机化学
作者
Stefano Manzoni,J. A. Trofymow,Robert B. Jackson,Amilcare Porporato
出处
期刊:Ecological Monographs [Wiley]
卷期号:80 (1): 89-106 被引量:713
标识
DOI:10.1890/09-0179.1
摘要

The mineralization of nitrogen and phosphorus from plant residues provides an important input of inorganic nutrients to the soil, which can be taken up by plants. The dynamics of nutrient mineralization or immobilization during decomposition are controlled by different biological and physical factors. Decomposers sequester carbon and nutrients from organic substrates and exchange inorganic nutrients with the environment to maintain their stoichiometric balance. Additionally, physical losses of organic compounds from leaching and other processes may alter the nutrient content of litter. In this work, we extend a stoichiometric model of litter nitrogen mineralization to include (1) phosphorus mineralization, (2) physical losses of organic nutrients, and (3) chemical heterogeneity of litter substrates. The enhanced model provides analytical mineralization curves for nitrogen and phosphorus as well as critical litter carbon : nutrient ratios (the carbon : nutrient ratios below which net nutrient release occurs) as a function of the elemental composition of the decomposers, their carbon‐use efficiency, and the rate of physical loss of organic compounds. The model is used to infer the critical litter carbon : nutrient ratios from observed nitrogen and phosphorus dynamics in about 2600 litterbag samplings from 21 decomposition data sets spanning artic to tropical ecosystems. At the beginning of decomposition, nitrogen and phosphorus tend to be immobilized in boreal and temperate climates (i.e., both C:N and C:P critical ratios are lower than the initial ratios), while in tropical areas nitrogen is generally released and phosphorus may be either immobilized or released, regardless of the typically low phosphorus concentrations. The critical carbon : nutrient ratios we observed were found to increase with initial litter carbon : nutrient ratios, indicating that decomposers adapt to low‐nutrient conditions by reducing their carbon‐use efficiency. This stoichiometric control on nutrient dynamics appears ubiquitous across climatic regions and ecosystems, although other biological and physical processes also play important roles in litter decomposition. In tropical humid conditions, we found high critical C:P ratios likely due to high leaching and low decomposer phosphorus concentrations. In general, the compound effects of stoichiometric constraints and physical losses explain most of the variability in critical carbon : nutrient ratios and dynamics of nutrient immobilization and release at the global scale.
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
大幅提高文件上传限制,最高150M (2024-4-1)

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
3秒前
vain完成签到,获得积分10
3秒前
ding应助阿智采纳,获得10
10秒前
FashionBoy应助悦耳的镜子采纳,获得10
23秒前
23秒前
隐形曼青应助科研王者采纳,获得30
25秒前
34秒前
Esperanza完成签到,获得积分10
35秒前
han发布了新的文献求助30
35秒前
无花果应助科研通管家采纳,获得10
1分钟前
yx应助科研通管家采纳,获得10
1分钟前
1分钟前
1分钟前
科研通AI2S应助jyy采纳,获得10
1分钟前
charliechen完成签到,获得积分10
1分钟前
悦耳的镜子完成签到,获得积分10
1分钟前
学术小白完成签到,获得积分10
1分钟前
charliechen发布了新的文献求助100
1分钟前
科研王者完成签到,获得积分10
1分钟前
传奇3应助llm采纳,获得10
1分钟前
在水一方应助yf采纳,获得10
1分钟前
1分钟前
1分钟前
blind发布了新的文献求助10
1分钟前
han完成签到,获得积分10
1分钟前
1分钟前
kleinlme发布了新的文献求助10
1分钟前
照海发布了新的文献求助30
2分钟前
yufanhui应助han采纳,获得10
2分钟前
梦在远方完成签到 ,获得积分10
2分钟前
2分钟前
2分钟前
Zoe发布了新的文献求助10
2分钟前
2分钟前
yayyaya完成签到 ,获得积分10
2分钟前
kleinlme完成签到,获得积分10
2分钟前
科研王者发布了新的文献求助30
2分钟前
小白完成签到,获得积分10
2分钟前
小白发布了新的文献求助10
2分钟前
2分钟前
高分求助中
歯科矯正学 第7版(或第5版) 1004
Semiconductor Process Reliability in Practice 1000
Smart but Scattered: The Revolutionary Executive Skills Approach to Helping Kids Reach Their Potential (第二版) 1000
Nickel superalloy market size, share, growth, trends, and forecast 2023-2030 600
GROUP-THEORY AND POLARIZATION ALGEBRA 500
Mesopotamian divination texts : conversing with the gods : sources from the first millennium BCE 500
Days of Transition. The Parsi Death Rituals(2011) 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 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 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3234546
求助须知:如何正确求助?哪些是违规求助? 2880894
关于积分的说明 8217297
捐赠科研通 2548495
什么是DOI,文献DOI怎么找? 1377792
科研通“疑难数据库(出版商)”最低求助积分说明 647999
邀请新用户注册赠送积分活动 623347