干旱区生态环境知识资源中心(Arid): Impact of biological crusts on soil formation in polar ecosystems

Arid

DOI	10.1016/j.geoderma.2021.115340
	Impact of biological crusts on soil formation in polar ecosystems
	Agnelli, Alberto; Corti, Giuseppe; Massaccesi, Luisa; Ventura, Stefano; D'Acqui, Luigi P.
通讯作者	Agnelli, A (corresponding author), Univ Perugia, Dept Agr Food & Environm Sci, Borgo XX Giugno,74, I-06121 Perugia, Italy.
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2021
卷号	401
英文摘要	We tested the impact of biological soil crusts (BSC) at different degrees of development on soil formation in Polar ecosystems, specifically in two Arctic sites, Svalbard Island (Norway) and Tarfala (Sweden), and in an Antarctic site, Apostrophe Island (Victoria Land). In each site, slightly developed BSC (thin and made by green algae and cyanobacteria associations - SD-BSC) highly developed BSC (thick and dominated by green algae and cyano-bacteria associations with/without mosses and/or lichens - HD-BSC), and moderately developed BSC (MD-BSC) with intermediate characteristics between the slightly and the highly developed, were sampled together with the AC and A horizons immediately under the crust. After separating the organic residue of the biocrust from the mineral phase by density fractionation, in the heavy fractions obtained from HD-BSC, MD-BSC and SD-BSC we determined the amount of soil organic carbon and its radiocarbon natural abundance, total nitrogen content, mineralogical assemblage by x-ray diffraction, and quality of soil organic matter (SOM) by infrared photoacoustic spectroscopy (FTIR-PAS). We found that when BSC were able to develop on stable ice-free surfaces, they modified the soil by supplying new organic substances. These new substances, in addition to diluting the old C inherited from the substrate and darkening the upper mineral horizon, promoted acidification, which is responsible for mineral weathering and neogenesis of clay minerals. With their development, BSC act as ecosystem engineers and promote soil formation in Polar ecosystems by increasing soil stability, organic matter content and nutrient availability, which indirectly improve aggregation, water holding capacity, and soil heating.
英文关键词	Gelisols Biocrusts Soil organic C Weathering Radiocarbon Infrared photoacoustic spectrometry (FTIR-PAS)
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000688573200013
WOS关键词	NORTHERN VICTORIA LAND ; TERRA-NOVA BAY ; ORGANIC-MATTER ; CYANOBACTERIAL EXOPOLYSACCHARIDES ; MICROBIOTIC CRUSTS ; MIDTRE LOVENBREEN ; MASS-BALANCE ; GLACIER ; DESERT ; CARBON
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363383
作者单位	[Agnelli, Alberto] Univ Perugia, Dept Agr Food & Environm Sci, Borgo XX Giugno,74, I-06121 Perugia, Italy; [Corti, Giuseppe] Polytech Univ Marche, Dept Agr Food & Environm Sci, Ancona, Italy; [Agnelli, Alberto; Massaccesi, Luisa] Ist Zooprofilatt Sperimentale Umbria & Marche, Res & Dev Dept, Perugia, Italy; [Ventura, Stefano; D'Acqui, Luigi P.] Natl Res Council CNR, Res Inst Terr Ecosyst IRET, Florence, Italy; [Ventura, Stefano] Embassy Italy Israel, Tel Aviv, Israel
推荐引用方式 GB/T 7714	Agnelli, Alberto,Corti, Giuseppe,Massaccesi, Luisa,et al. Impact of biological crusts on soil formation in polar ecosystems[J],2021,401.
APA	Agnelli, Alberto,Corti, Giuseppe,Massaccesi, Luisa,Ventura, Stefano,&D'Acqui, Luigi P..(2021).Impact of biological crusts on soil formation in polar ecosystems.GEODERMA,401.
MLA	Agnelli, Alberto,et al."Impact of biological crusts on soil formation in polar ecosystems".GEODERMA 401(2021).