Roots and associated fungi drive long-term carbon sequestration in boreal forest.
Science
; 339(6127): 1615-8, 2013 Mar 29.
Article
em En
| MEDLINE
| ID: mdl-23539604
ABSTRACT
Boreal forest soils function as a terrestrial net sink in the global carbon cycle. The prevailing dogma has focused on aboveground plant litter as a principal source of soil organic matter. Using (14)C bomb-carbon modeling, we show that 50 to 70% of stored carbon in a chronosequence of boreal forested islands derives from roots and root-associated microorganisms. Fungal biomarkers indicate impaired degradation and preservation of fungal residues in late successional forests. Furthermore, 454 pyrosequencing of molecular barcodes, in conjunction with stable isotope analyses, highlights root-associated fungi as important regulators of ecosystem carbon dynamics. Our results suggest an alternative mechanism for the accumulation of organic matter in boreal forests during succession in the long-term absence of disturbance.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Árvores
/
Raízes de Plantas
/
Ciclo do Carbono
/
Fungos
Tipo de estudo:
Risk_factors_studies
Idioma:
En
Revista:
Science
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Suécia