Divergent effects of snow exclusion on microbial variables across aggregate size classes

微生物种群生物学 非生物成分 生态系统 生态学 积雪 环境科学 海洋雪 化学 环境化学 农学 生物 细菌 遗传学 物理 水柱 气象学
作者
Kun Yang,Rui Yin,Josep Peñuelas,Zhijie Li,Bo Tan,Chengming You,Lixia Wang,Yang Liu,Li Zhang,Han Li,Yang Liu,Lianghua Chen,Jian Zhang,Zhenfeng Xu
出处
期刊:Catena [Elsevier BV]
卷期号:206: 105481-105481 被引量:2
标识
DOI:10.1016/j.catena.2021.105481
摘要

Projected changes in winter climate can have large implications for the functioning of terrestrial ecosystems. In particular, increased soil frost associated with reduced insulating snow cover can affect the structure and activity of soil microbial communities in cold ecosystems, but little known about the variability of these effects among the fractions of soil aggregates. We used a snow-exclusion experiment to examine the influence of increased soil frost on microbial biomass and activity in aggregate fractions in a Tibetan alpine spruce forest. We measured the concentrations of phospholipid fatty acids (PLFAs) and the activities of extracellular enzymes involved in carbon and nutrient cycling in soil aggregate fractions (<0.25 mm, 0.25–2 mm and >2 mm) during early thawing years of 2016 and 2017. We found that snow exclusion reduced the concentrations of PLFAs (total, bacterial and fungal) and the activities of enzymes (β-glucosidase, β-N-acetyl-glucosaminidase and acid phosphatase) in three aggregate fractions due to severe abiotic environments, but did not affect the microbial community or enzymatic stoichiometry. Although they varied across the aggregate fractions, soil microbial variables responded to snow exclusion significantly only in the small macroaggregates (0.25–2 mm), which indicated that aggregate size may have a stronger effect than did snow exclusion on microbial variables. Notably, A significant decrease of PLFAs and enzymatic activities in the small macroaggregates under snow exclusion revealed that soil microbes in this fraction were more sensitive to changes in snow cover than in the other aggregate fractions. These findings highlight the ecological importance of microbial processes in aggregates in Tibetan forests experiencing large decreases in snowfall.

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
Chimmy完成签到,获得积分10
1秒前
朴树朋友完成签到,获得积分20
1秒前
wlnhyF完成签到,获得积分10
3秒前
pursuit完成签到,获得积分10
6秒前
Neltharion完成签到,获得积分10
7秒前
沈海完成签到,获得积分10
9秒前
悦耳傥完成签到 ,获得积分10
9秒前
一叶知秋应助大橙子采纳,获得10
9秒前
科研小能手完成签到,获得积分10
10秒前
guoxingliu发布了新的文献求助200
11秒前
Double_N完成签到,获得积分10
14秒前
路路完成签到 ,获得积分10
15秒前
碧蓝的盼夏完成签到,获得积分10
19秒前
AU完成签到 ,获得积分10
20秒前
研友_yLpYkn完成签到,获得积分10
21秒前
兴奋的定帮完成签到 ,获得积分0
22秒前
一叶知秋应助大橙子采纳,获得10
23秒前
24秒前
金蛋蛋完成签到 ,获得积分10
24秒前
马琛尧完成签到 ,获得积分10
26秒前
一行白鹭上青天完成签到 ,获得积分10
30秒前
帅气的宽完成签到 ,获得积分10
31秒前
lixoii完成签到 ,获得积分10
33秒前
萌萌许完成签到,获得积分10
33秒前
sunce1990完成签到 ,获得积分10
36秒前
Bin_Liu完成签到,获得积分20
37秒前
宇老师完成签到,获得积分10
37秒前
研友_VZG7GZ应助马琛尧采纳,获得10
38秒前
安安的小板栗完成签到,获得积分10
41秒前
123_完成签到,获得积分10
43秒前
NexusExplorer应助大橙子采纳,获得10
44秒前
上善若水完成签到 ,获得积分10
46秒前
qiqi发布了新的文献求助10
50秒前
50秒前
英俊的铭应助cm采纳,获得10
51秒前
52秒前
量子星尘发布了新的文献求助10
52秒前
affy210310完成签到,获得积分10
53秒前
名字不好起完成签到,获得积分10
53秒前
齐朕完成签到,获得积分10
54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 4038157
求助须知:如何正确求助?哪些是违规求助? 3575869
关于积分的说明 11373842
捐赠科研通 3305650
什么是DOI,文献DOI怎么找? 1819255
邀请新用户注册赠送积分活动 892655
科研通“疑难数据库(出版商)”最低求助积分说明 815022