Soil microbial communities regulate the threshold effect of salinity stress on SOM decomposition in coastal salt marshes

盐度 土壤盐分 微观世界 盐沼 环境科学 土壤碳 生态学 问题10 环境化学 土壤有机质 土壤水分 化学 土壤科学 植物 生物 呼吸
作者
Guangliang Zhang,Junhong Bai,Jia Jia,Wei Wang,Dawei Wang,Qingqing Zhao,Chen Wang,Guozhu Chen
出处
期刊:Fundamental research [Elsevier BV]
卷期号:3 (6): 868-879 被引量:19
标识
DOI:10.1016/j.fmre.2023.02.024
摘要

Salinity stress is one of the critical environmental drivers of soil organic matter (SOM) decomposition in coastal ecosystems. Although the temperature sensitivity (Q10) of SOM decomposition has been widely applied in Earth system models to forecast carbon processes, the impact of salinity on SOM decomposition by restructuring microbial communities remains uncovered. Here, we conducted a microcosm experiment with soils collected from the coastal salt marsh in the Yellow River Estuary, which is subjected to strong dynamics of salinity due to both tidal flooding and drainage. By setting a gradient of salt solutions, soil salinity was adjusted to simulate salinity stress and soil carbon emission (CO2) rate was measured over the period. Results showed that as salinity increased, the estimated decomposition constants based on first-order kinetics gradually decreased at different temperatures. Below the 20‰ salinity treatments, which doubled the soil salinity, Q10 increased with increasing salinity; but higher salinity constrained the temperature-related response of SOM decomposition by inhibiting microbial growth and carbon metabolisms. Soil bacteria were more sensitive to salinity stress than fungi, which can be inferred from the response of microbial beta-diversity to changing salinity. Among them, the phylotypes assigned to Gammaproteobacteria and Bacilli showed higher salt tolerance, whereas taxa affiliated with Alphaproteobacteria and Bacteroidota were more easily inhibited by the salinity stress. Several fungal taxa belonging to Ascomycota had higher adaptability to the stress. As the substrate was consumed with the incubation, bacterial competition intensified, but the fungal co-occurrence pattern changed weakly during decomposition. Collectively, these findings revealed the threshold effect of salinity on SOM decomposition in coastal salt marshes and emphasized that salt stress plays a key role in carbon sequestration by regulating microbial keystone taxa, metabolisms, and interactions.
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
亚洲黑熊完成签到,获得积分10
1秒前
123321完成签到 ,获得积分10
2秒前
Dr.c发布了新的文献求助10
2秒前
虚心的芹发布了新的文献求助10
2秒前
2秒前
虎虎生威发布了新的文献求助10
3秒前
xmuchem发布了新的文献求助10
3秒前
笨笨乘风完成签到,获得积分10
3秒前
3秒前
3秒前
4秒前
好好好完成签到,获得积分10
4秒前
cxm666完成签到,获得积分20
4秒前
小二郎应助simon采纳,获得10
4秒前
量子星尘发布了新的文献求助30
5秒前
和谐的棉花糖完成签到 ,获得积分10
6秒前
无相变发布了新的文献求助30
6秒前
Lee发布了新的文献求助10
6秒前
6秒前
阿这完成签到,获得积分10
6秒前
7秒前
大力访波完成签到 ,获得积分10
8秒前
鱼会淹死吗应助土豪的钻石采纳,获得100
8秒前
派大星不科研完成签到,获得积分10
8秒前
陈彦滨发布了新的文献求助10
8秒前
9秒前
leichun发布了新的文献求助10
9秒前
10秒前
11秒前
11秒前
11秒前
研友_Zbb4mZ完成签到,获得积分10
12秒前
12秒前
小怪兽发布了新的文献求助10
14秒前
Lii开心完成签到,获得积分10
14秒前
yhuang完成签到,获得积分10
14秒前
余烬22发布了新的文献求助10
16秒前
16秒前
啦啦啦啦完成签到,获得积分10
16秒前
Desmond发布了新的文献求助30
16秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
A Preliminary Study on Correlation Between Independent Components of Facial Thermal Images and Subjective Assessment of Chronic Stress 500
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 360
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 3970949
求助须知:如何正确求助?哪些是违规求助? 3515634
关于积分的说明 11179061
捐赠科研通 3250769
什么是DOI,文献DOI怎么找? 1795474
邀请新用户注册赠送积分活动 875831
科研通“疑难数据库(出版商)”最低求助积分说明 805188