Extensive belowground carbon storage supports roots and mycorrhizae in regenerating scrub oaks.

Portions of a regenerating scrub oak ecosystem were enclosed in open-top chambers and exposed to elevated CO2. The distinct 13C signal of the supplemental CO2 was used to trace the rate of C integration into various ecosystem components. Oak foliage, stems, roots and ectomycorrhizae were sampled ove...

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Main Authors: Langley, J., Drake, B., Hungate, B.
Format: Villanova Faculty Authorship
Language:English
Published: 2002
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spelling Extensive belowground carbon storage supports roots and mycorrhizae in regenerating scrub oaks.
Langley, J.
Drake, B.
Hungate, B.
Portions of a regenerating scrub oak ecosystem were enclosed in open-top chambers and exposed to elevated CO2. The distinct 13C signal of the supplemental CO2 was used to trace the rate of C integration into various ecosystem components. Oak foliage, stems, roots and ectomycorrhizae were sampled over 3 years and were analyzed for 13C composition. The aboveground tissue 13C equilibrated to the novel 13C signal in the first season, while the belowground components displayed extremely slow integration of the new C. Roots taken from ingrowth cores showed that 33% of the C in newly formed roots originated from a source other than recent photosynthesis inside the chamber. In this highly fireprone system, the oaks re-establish primarily by resprouting from large rhizomes. Remobilization from belowground C stores may support fine roots and mycorrhizae for several years into stand re-establishment and, therefore, may explain why belowground tissues contain less of the new photosynthate than expected. Though it has been shown that long-term cycles of C storage are theoretically advantageous for plants in systems with frequent and severe disturbances, such patterns have not been previously examined in wild systems.
2002
Villanova Faculty Authorship
vudl:177987
Oecologia 131 (4), May 2002, 542-548.
en
dc.title_txt_mv Extensive belowground carbon storage supports roots and mycorrhizae in regenerating scrub oaks.
dc.creator_txt_mv Langley, J.
Drake, B.
Hungate, B.
dc.description_txt_mv Portions of a regenerating scrub oak ecosystem were enclosed in open-top chambers and exposed to elevated CO2. The distinct 13C signal of the supplemental CO2 was used to trace the rate of C integration into various ecosystem components. Oak foliage, stems, roots and ectomycorrhizae were sampled over 3 years and were analyzed for 13C composition. The aboveground tissue 13C equilibrated to the novel 13C signal in the first season, while the belowground components displayed extremely slow integration of the new C. Roots taken from ingrowth cores showed that 33% of the C in newly formed roots originated from a source other than recent photosynthesis inside the chamber. In this highly fireprone system, the oaks re-establish primarily by resprouting from large rhizomes. Remobilization from belowground C stores may support fine roots and mycorrhizae for several years into stand re-establishment and, therefore, may explain why belowground tissues contain less of the new photosynthate than expected. Though it has been shown that long-term cycles of C storage are theoretically advantageous for plants in systems with frequent and severe disturbances, such patterns have not been previously examined in wild systems.
dc.date_txt_mv 2002
dc.format_txt_mv Villanova Faculty Authorship
dc.identifier_txt_mv vudl:177987
dc.source_txt_mv Oecologia 131 (4), May 2002, 542-548.
dc.language_txt_mv en
author Langley, J.
Drake, B.
Hungate, B.
spellingShingle Langley, J.
Drake, B.
Hungate, B.
Extensive belowground carbon storage supports roots and mycorrhizae in regenerating scrub oaks.
author_facet Langley, J.
Drake, B.
Hungate, B.
dc_source_str_mv Oecologia 131 (4), May 2002, 542-548.
format Villanova Faculty Authorship
author_sort Langley, J.
dc_date_str 2002
dc_title_str Extensive belowground carbon storage supports roots and mycorrhizae in regenerating scrub oaks.
description Portions of a regenerating scrub oak ecosystem were enclosed in open-top chambers and exposed to elevated CO2. The distinct 13C signal of the supplemental CO2 was used to trace the rate of C integration into various ecosystem components. Oak foliage, stems, roots and ectomycorrhizae were sampled over 3 years and were analyzed for 13C composition. The aboveground tissue 13C equilibrated to the novel 13C signal in the first season, while the belowground components displayed extremely slow integration of the new C. Roots taken from ingrowth cores showed that 33% of the C in newly formed roots originated from a source other than recent photosynthesis inside the chamber. In this highly fireprone system, the oaks re-establish primarily by resprouting from large rhizomes. Remobilization from belowground C stores may support fine roots and mycorrhizae for several years into stand re-establishment and, therefore, may explain why belowground tissues contain less of the new photosynthate than expected. Though it has been shown that long-term cycles of C storage are theoretically advantageous for plants in systems with frequent and severe disturbances, such patterns have not been previously examined in wild systems.
title Extensive belowground carbon storage supports roots and mycorrhizae in regenerating scrub oaks.
title_full Extensive belowground carbon storage supports roots and mycorrhizae in regenerating scrub oaks.
title_fullStr Extensive belowground carbon storage supports roots and mycorrhizae in regenerating scrub oaks.
title_full_unstemmed Extensive belowground carbon storage supports roots and mycorrhizae in regenerating scrub oaks.
title_short Extensive belowground carbon storage supports roots and mycorrhizae in regenerating scrub oaks.
title_sort extensive belowground carbon storage supports roots and mycorrhizae in regenerating scrub oaks.
publishDate 2002
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