Microbial necromass formation, enzyme activities and community structure in two alpine elevation gradients with different bedrock types

doi:10.1016/j.geoderma.2020.114922

KIB OpenIR

	Microbial necromass formation, enzyme activities and community structure in two alpine elevation gradients with different bedrock types
	Bhople,Parag ; Keiblinger,Katharina ; Djukic,Ika ; Liu,Dong ; Zehetner,Franz ; Zechmeister-Boltenstern,Sophie ; Joergensen,Rainer Georg ; Murugan,Rajasekaran
	2021
发表期刊	GEODERMA
ISSN	0016-7061
卷号	386 页码:114922
摘要	Microbial necromass is an important part of soil organic carbon (SOC), but the changes in its contribution along elevational gradients and soil types are poorly understood. At two sites, the alkaline site Hochschwab and the acidic site Rauris, soil samples from three elevation levels and depths were analysed for amino sugars as microbial necromass indices, extracellular enzymes, and phospholipid fatty acids (PLFA) as microbial biomass indices. The three elevation levels at each site represented similar temperature and precipitation regimes. Microbial necromass contribution to SOC was lower (26%) at the alkaline site than at the acidic site (37%), indicating lower transformation of microbial biomass into stable SOC and support the increased accumulation of fungal necromass under N limitation at Hochschwab. Fungi generally dominate microbial necromass, with 88% at Hochschwab and 77% at Rauris. At the alkaline site Hochschwab, phenoloxidase, peroxidase and phosphatase enzymes activities were lower by 96%, 98% and 75%, respectively than at the acidic Rauris site, but not those of the hydrolytic enzymes beta-glucosidase, exo-glucanase, exo-chitinase, and protease, indicating retarded decomposition of plant residues. Gram positive bacteria dominate bacterial biomass at both sites, with 70% at Hochschwab and 72% at Rauris. The higher fungal to bacterial PLFA ratio suggest increased contribution of fungi to total microbial PLFA at Hochschwab due to the better adaptability of fungi to the site-specific environmental conditions. Effects along alpine elevation gradients depend on vegetation induced changes in soil properties, which interact with bedrock properties.
关键词	Alpine ecosystems Amino sugars Carbon sequestration Climate change Elevation gradients Enzyme activities PLFA
DOI	10.1016/j.geoderma.2020.114922
WOS记录号	WOS:000613923000016
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/73392
专题	中国科学院昆明植物研究所
作者单位	1.Univ Kassel, Soil Biol & Plant Nutr, Nordbahnhof Str 1a, D-37213 Witzenhausen, Germany 2.Univ Nat Resources & Life Sci, Inst Soil Res, Dept Forest & Soil Sci, Peter Jordan Str 82, A-1190 Vienna, Austria 3.Swiss Fed Inst Forest Snow & Landscape Res WSL, Zurcherstr 11, CH-8903 Birmensdorf, Switzerland 4.Chinese Acad Sci, Kunming Inst Bot, Kunming 650100, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Bhople,Parag,Keiblinger,Katharina,Djukic,Ika,et al. Microbial necromass formation, enzyme activities and community structure in two alpine elevation gradients with different bedrock types[J]. GEODERMA,2021,386:114922.
APA	Bhople,Parag.,Keiblinger,Katharina.,Djukic,Ika.,Liu,Dong.,Zehetner,Franz.,...&Murugan,Rajasekaran.(2021).Microbial necromass formation, enzyme activities and community structure in two alpine elevation gradients with different bedrock types.GEODERMA,386,114922.
MLA	Bhople,Parag,et al."Microbial necromass formation, enzyme activities and community structure in two alpine elevation gradients with different bedrock types".GEODERMA 386(2021):114922.