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Mixing ratio and species affect the use of substrate-derived CO2 by Sphagnum

Mixing ratio and species affect the use of substrate-derived CO2 by Sphagnum
Mixing ratio and species affect the use of substrate-derived CO2 by Sphagnum

Question: Can mixing ratio and species affect the use of substrate-derived CO2 by Sphagnum? Location: Poor fen in south Sweden and greenhouse in Wageningen, The Netherlands. Methods: Two mixing ratios of Sphagnum cuspidatum and S. magellanicum were exposed to two levels of CO2 by pumping CO2 enriched and non-enriched water through aquaria containing the species mixtures in the greenhouse. Results: Enhanced CO2 stimulated the production of S. cuspidatum, but only in aquaria co-dominated by S. magellanicum, coinciding with higher CO2 concentrations in the water layer. The denser growing S. magellanicum seemed to reduce gas escape from the water, resulting in accumulation of dissolved CO2. Adding CO 2 did not affect species replacement. Conclusions: The use of substrate-derived CO2 forSphagnum production depended on species identity and mixing ratio. The effect of mixing ratio on CO2 concentrations in the water layer suggests that species composition may affect both the efficiency with which substrate-derived CO2 is trapped and subsequently used. This could result in hitherto unexplored feedbacks between vegetation composition and gas exchange.

Bog, Bryophyte, Carbon production, Gas exchange; Mire, Peatland.
1100-9233
841-848
Limpens, J.
b4625b8e-3965-426b-b79a-89fb8ce9b812
Robroek, B. J M
06dcb269-687c-41db-ab73-f61899617f92
Heijmans, M. M P D
73904fe4-fae8-4fde-b012-1ee97a658566
Tomassen, H. B M
bc2794e5-9fb2-4c87-9d10-20453f94dc94
Limpens, J.
b4625b8e-3965-426b-b79a-89fb8ce9b812
Robroek, B. J M
06dcb269-687c-41db-ab73-f61899617f92
Heijmans, M. M P D
73904fe4-fae8-4fde-b012-1ee97a658566
Tomassen, H. B M
bc2794e5-9fb2-4c87-9d10-20453f94dc94

Limpens, J., Robroek, B. J M, Heijmans, M. M P D and Tomassen, H. B M (2008) Mixing ratio and species affect the use of substrate-derived CO2 by Sphagnum. Journal of Vegetation Science, 19 (6), 841-848. (doi:10.3170/2008-8-18456).

Record type: Article

Abstract

Question: Can mixing ratio and species affect the use of substrate-derived CO2 by Sphagnum? Location: Poor fen in south Sweden and greenhouse in Wageningen, The Netherlands. Methods: Two mixing ratios of Sphagnum cuspidatum and S. magellanicum were exposed to two levels of CO2 by pumping CO2 enriched and non-enriched water through aquaria containing the species mixtures in the greenhouse. Results: Enhanced CO2 stimulated the production of S. cuspidatum, but only in aquaria co-dominated by S. magellanicum, coinciding with higher CO2 concentrations in the water layer. The denser growing S. magellanicum seemed to reduce gas escape from the water, resulting in accumulation of dissolved CO2. Adding CO 2 did not affect species replacement. Conclusions: The use of substrate-derived CO2 forSphagnum production depended on species identity and mixing ratio. The effect of mixing ratio on CO2 concentrations in the water layer suggests that species composition may affect both the efficiency with which substrate-derived CO2 is trapped and subsequently used. This could result in hitherto unexplored feedbacks between vegetation composition and gas exchange.

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More information

Published date: December 2008
Keywords: Bog, Bryophyte, Carbon production, Gas exchange; Mire, Peatland.

Identifiers

Local EPrints ID: 413467
URI: http://eprints.soton.ac.uk/id/eprint/413467
ISSN: 1100-9233
PURE UUID: 85e22169-5b1b-4c34-94e1-351ca3a12acc
ORCID for B. J M Robroek: ORCID iD orcid.org/0000-0002-6714-0652

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Date deposited: 24 Aug 2017 16:30
Last modified: 15 Mar 2024 15:02

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Contributors

Author: J. Limpens
Author: B. J M Robroek ORCID iD
Author: M. M P D Heijmans
Author: H. B M Tomassen

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