Rhizosphere disturbance influences fungal colonization and community development on dead fine roots

Melany C. Fisk, Timothy J. Fahey, James H. Sobieraj, Andria Costello Staniec, Thomas O. Crist

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Little is known about the community dynamics of fungi on decomposing fine roots, despite the importance of fine roots as a source of carbon to detrital systems in forests. We examined fungal communities on dead roots in a sugar-maple dominated northern hardwood forest to test the hypothesis that community development is sensitive to rhizosphere disruption. We generated cohorts of dead fine roots in root windows and disturbed the rhizosphere microbial community in half of the windows by moving roots into sieved bulk soil. We sampled root fragments repeatedly over time and cultured fungi from these fragments to explore temporal patterns of fungal species composition. Disturbing the root rhizosphere prior to initiating decomposition changed the dominant fungal taxa, the distribution of dominant species within the community, and the temporal development in the culturable fungal community. Dominance in control roots shifted from Neonectria in early decay to Umbelopsis in later decay. Disturbance roots were more evenly dominated over time by Trichoderma, Neonectria, another species of Umbelopsis, and Pochonia. Our results suggest that species interactions are important in the ecology of fine root decay fungi, with the rhizosphere community of the living root influencing development of the decay community.

Original languageEnglish (US)
Pages (from-to)279-293
Number of pages15
JournalPlant and Soil
Volume341
Issue number1-2
DOIs
StatePublished - Apr 2011

Fingerprint

community development
fine root
rhizosphere
colonization
disturbance
Umbelopsis
Neonectria
fungal communities
deterioration
fungus
decay fungi
fungi
Acer saccharum subsp. saccharum
fine roots
community dynamics
Trichoderma
hardwood forests
microbial communities
microbial community
sugar

Keywords

  • Decomposer community
  • Disturbance
  • Fine roots
  • Fungi
  • Hubbard Brook Experimental Forest

ASJC Scopus subject areas

  • Soil Science
  • Plant Science

Cite this

Rhizosphere disturbance influences fungal colonization and community development on dead fine roots. / Fisk, Melany C.; Fahey, Timothy J.; Sobieraj, James H.; Staniec, Andria Costello; Crist, Thomas O.

In: Plant and Soil, Vol. 341, No. 1-2, 04.2011, p. 279-293.

Research output: Contribution to journalArticle

Fisk, Melany C. ; Fahey, Timothy J. ; Sobieraj, James H. ; Staniec, Andria Costello ; Crist, Thomas O. / Rhizosphere disturbance influences fungal colonization and community development on dead fine roots. In: Plant and Soil. 2011 ; Vol. 341, No. 1-2. pp. 279-293.
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