C, N, and P Stoichiometry Characteristics of Fresh and Weathered Sandstones in Longhushan Area, SE China
Chang, Yunni (Fujian Normal University. College of Geographical Sciences)
Xu, Chaobin (Fujian Normal University. College of Geographical Sciences)
Qiu, Junting (Beijing Research Institute of Uranium Geology. National Key Laboratory of Science and Technology on Remote Sensing Information and Image Analysis)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Zeng, Hanzhao (Fujian Normal University. College of Geographical Sciences)
Zhong, Quanlin (Fujian Normal University. College of Geographical Sciences)
Li, Baoyin (Fujian Normal University. College of Geographical Sciences)

Date:	2023
Abstract:	Carbon (C), nitrogen (N), and phosphorus (P) stoichiometry and their allometric relationships in soil and plants are hot topics that attract a lot of attention, while those rocks that form soils are often neglected. Weathering is a common geological phenomenon that may significantly influence the nutrient composition and release of nutrients from rock and its inherent soils. This study presents C, N, and P concentrations data as well as microscope petrological photographs of fresh and weathered sandstones from Longhushan World Geopark in SE China, in an attempt to investigate C, N, and P stoichiometry of rocks before and after weathering and discuss the driving mechanisms. The results show that weathering significantly decreased rock C, C/N, and C/P concentrations, slightly decreased N and N/P concentrations, and slightly increased P concentration. Microscope observations show that fresh sandstones contain calcite, apatite, microplagioclase, and organic matter, while weathered sandstones feature apatite and organic matter. The flexible allometric relationships and mineral changes before and after rock weathering indicate that chemical mechanisms, such as dissolution of carbonate and hydration of microplagioclase, have changed the existence form of C, N, P and, thus, significantly influence rock C, N, and P stoichiometry. This stoichiometry feature can be in turn used to reflect the regulation effect of rock weathering.
Grants:	Agencia Estatal de Investigación PID2019-110521GB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1005
Note:	Altres ajuts: the Fundación Ramón Areces grant CIVP20A6621
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Weathering ; C N and P stoichiometry ; Allometric relationship ; Danxia landform rocks
Published in:	Minerals, Vol. 13, Issue 4 (March 2023) , art. 483, ISSN 2075-163X

DOI: 10.3390/min13040483

12 p, 2.1 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Articles > Research articles
Articles > Published articles