干旱区生态环境知识资源中心(Arid): Validating the regional estimates of changes in soil organic carbon by using the data from paired-sites: the case study of Mediterranean arable lands

Arid

DOI	10.1186/s13021-021-00182-7
	Validating the regional estimates of changes in soil organic carbon by using the data from paired-sites: the case study of Mediterranean arable lands
	Schillaci, Calogero; Saia, Sergio; Lipani, Aldo; Perego, Alessia; Zaccone, Claudio; Acutis, Marco
通讯作者	Schillaci, C (corresponding author), Univ Milan, Dept Agr & Environm Sci, I-20133 Milan, Italy.
来源期刊	CARBON BALANCE AND MANAGEMENT
ISSN	1750-0680
出版年	2021
卷号	16 期号:1
英文摘要	Background Legacy data are unique occasions for estimating soil organic carbon (SOC) concentration changes and spatial variability, but their use showed limitations due to the sampling schemes adopted and improvements may be needed in the analysis methodologies. When SOC changes is estimated with legacy data, the use of soil samples collected in different plots (i.e., non-paired data) may lead to biased results. In the present work, N = 302 georeferenced soil samples were selected from a regional (Sicily, south of Italy) soil database. An operational sampling approach was developed to spot SOC concentration changes from 1994 to 2017 in the same plots at the 0-30 cm soil depth and tested. Results The measurements were conducted after computing the minimum number of samples needed to have a reliable estimate of SOC variation after 23 years. By applying an effect size based methodology, 30 out of 302 sites were resampled in 2017 to achieve a power of 80%, and an alpha = 0.05. A Wilcoxon test applied to the variation of SOC from 1994 to 2017 suggested that there was not a statistical difference in SOC concentration after 23 years (Z = - 0.556; 2-tailed asymptotic significance = 0.578). In particular, only 40% of resampled sites showed a higher SOC concentration than in 2017. Conclusions This finding contrasts with a previous SOC concentration increase that was found in 2008 (75.8% increase when estimated as differences of 2 models built with non-paired data), when compared to 1994 observed data (Z = - 9.119; 2-tailed asymptotic significance < 0.001). This suggests that the use of legacy data to estimate SOC concentration dynamics requires soil resampling in the same locations to overcome the stochastic model errors. Further experiment is needed to identify the percentage of the sites to resample in order to align two legacy datasets in the same area.
英文关键词	Soil organic carbon (SOC) Soil monitoring Minimum detectable change (MDC) Power analysis Semi-arid
类型	Article
语种	英语
开放获取类型	Green Published, gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000658750500001
WOS关键词	NITROGEN-FERTILIZATION ; AGRICULTURAL SOILS ; ECOSYSTEM SERVICES ; CLIMATE-CHANGE ; NO-TILL ; SEQUESTRATION ; STOCKS ; UNCERTAINTY ; TEMPERATURE ; GRASSLAND
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	University of London
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368699
作者单位	[Schillaci, Calogero; Perego, Alessia; Acutis, Marco] Univ Milan, Dept Agr & Environm Sci, I-20133 Milan, Italy; [Saia, Sergio] Univ Pisa, Dept Vet Sci, Via Piagge 2, I-56129 Pisa, Italy; [Lipani, Aldo] Univ Coll London UCL, Dept Civil Environm & Geomat Engn, Gower St, London WC1E 6BT, England; [Zaccone, Claudio] Univ Verona, Dept Biotechnol, Str Le Grazie 15, I-37134 Verona, Italy
推荐引用方式 GB/T 7714	Schillaci, Calogero,Saia, Sergio,Lipani, Aldo,et al. Validating the regional estimates of changes in soil organic carbon by using the data from paired-sites: the case study of Mediterranean arable lands[J]. University of London,2021,16(1).
APA	Schillaci, Calogero,Saia, Sergio,Lipani, Aldo,Perego, Alessia,Zaccone, Claudio,&Acutis, Marco.(2021).Validating the regional estimates of changes in soil organic carbon by using the data from paired-sites: the case study of Mediterranean arable lands.CARBON BALANCE AND MANAGEMENT,16(1).
MLA	Schillaci, Calogero,et al."Validating the regional estimates of changes in soil organic carbon by using the data from paired-sites: the case study of Mediterranean arable lands".CARBON BALANCE AND MANAGEMENT 16.1(2021).