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Arbuscular mycorrhizal mycelial respiration in a moist tropical forest

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dc.contributor.author Nottingham, Andrew T. en
dc.contributor.author Turner, Benjamin L. en
dc.contributor.author Winter, Klaus en
dc.contributor.author van, der Heijden en
dc.contributor.author Tanner, Edmund V. J. en
dc.date.accessioned 2011-02-16T18:26:00Z
dc.date.available 2011-02-16T18:26:00Z
dc.date.issued 2010
dc.identifier.citation Nottingham, Andrew T., Turner, Benjamin L., Winter, Klaus, van, der Heijden, and Tanner, Edmund V. J. 2010. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F12094">Arbuscular mycorrhizal mycelial respiration in a moist tropical forest</a>." <em>New Phytologist</em>. 186 (4):957&ndash;967. <a href="https://doi.org/10.1111/j.1469-8137.2010.03226.x">https://doi.org/10.1111/j.1469-8137.2010.03226.x</a> en
dc.identifier.issn 0028-646X
dc.identifier.uri http://hdl.handle.net/10088/12094
dc.description.abstract Arbuscular mycorrhizal fungi (AMF) are widespread in tropical forests and represent a major sink of photosynthate, yet their contribution to soil respiration in such ecosystems remains unknown. Using in-growth mesocosms we measured AMF mycelial respiration in two separate experiments: (1) an experiment in a semi-evergreen moist tropical forest, and (2) an experiment with 6-m-tall Pseudobombax septenatum in 4.5-m3 containers, for which we also determined the dependence of AMF mycelial respiration on the supply of carbon from the plant using girdling and root-cutting treatments. In the forest, AMF mycelia respired carbon at a rate of 1.4 t ha22121 yr22121, which accounted for 14 ± 6% of total soil respiration and 26 ± 12% of root-derived respiration. For P. septenatum, 40 ± 6% of root-derived respiration originated from AMF mycelia and carbon was respired &lt; 4 h after its supply from roots. We conclude that arbuscular mycorrhizal mycelial respiration can be substantial in lowland tropical forests. As it is highly dependent on the recent supply of carbon from roots, a function of aboveground fixation, AMF mycelial respiration is therefore an important pathway of carbon flux from tropical forest trees to the atmosphere. en
dc.relation.ispartof New Phytologist en
dc.title Arbuscular mycorrhizal mycelial respiration in a moist tropical forest en
dc.type Journal Article en
dc.identifier.srbnumber 90727
dc.identifier.doi 10.1111/j.1469-8137.2010.03226.x
rft.jtitle New Phytologist
rft.volume 186
rft.issue 4
rft.spage 957
rft.epage 967
dc.description.SIUnit STRI en
dc.description.SIUnit Gamboa en
dc.description.SIUnit Santa Cruz en
dc.description.SIUnit Central Panama en
dc.description.SIUnit BCI en
dc.description.SIUnit Barro Colorado Island en
dc.description.SIUnit Peer-reviewed en
dc.citation.spage 957
dc.citation.epage 967

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