Evidence of old soil carbon in grass biosilica particles

Fiche du document

Auteurs
Date

2015

Discipline
Type de document
Périmètre
Langue
Identifiants
Source

Archive Ouverte d'INRAE

Relations

Ce document est lié à :
info:eu-repo/semantics/altIdentifier/doi/10.5194/bgd-12-15369-2015

Collection

Institut national de recherche pour l’agriculture, l’alimentation et l’environnement

Organisation

INRAE

Mots-clés En

Carbon cycle Biogenic Silica Phytolith carbon

Sujets proches En

Calcium phytoliths Opal phytoliths Silica phytoliths Size of particles

Citer ce document

Paul E Reyerson et al., « Evidence of old soil carbon in grass biosilica particles », Archive Ouverte d'INRAE, ID : 10.5194/bgd-12-15369-2015

Métriques

Partage / Export

Résumé En

Plant biosilica particles (phytoliths) contain small amounts of carbon called phytC. Based on the assumptions that phytC is of photosynthetic origin and a closed system , claims were recently made that phytoliths from grasslands play a significant role in atmospheric CO 2 sequestration. However, anomalous phytC radiocarbon (14 C) 5 dates suggested contributions from a non-photosynthetic source to phytC. Here we address this non-photosynthetic source hypothesis using comparative isotopic measurements (14 C and δ 13 C) of phytC, plant tissues, atmospheric CO 2 , and soil organic matter. State-of-the-art methods assured phytolith purity, while sequential stepwise-combustion revealed complex chemical–thermal decomposability properties of phytC. 10

document thumbnail

Par les mêmes auteurs

Sur les mêmes sujets

Sur les mêmes disciplines

Exporter en