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Arbuscular mycorrhizal fungal community composition is altered by long-term litter removal but not litter addition in a lowland tropical forest.

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Title: Arbuscular mycorrhizal fungal community composition is altered by long-term litter removal but not litter addition in a lowland tropical forest.
Authors: Sheldrake, Merlin1,2 merlinsheldrake@gmail.com, Rosenstock, Nicholas P.3,4, Revillini, Daniel2,5, Olsson, Pål Axel4, Mangan, Scott2,6, Sayer, Emma J.2,7, Wallander, Håkan4, Turner, Benjamin L.2, Tanner, Edmund V. J.1
Source: New Phytologist. Apr2017, Vol. 214 Issue 1, p455-467. 13p.
Subjects: Vesicular-arbuscular mycorrhizas, Endomycorrhizas, Tropical forests, Nutrient cycles, Plant nutrients, Organic compounds
Abstract: Tropical forest productivity is sustained by the cycling of nutrients through decomposing organic matter. Arbuscular mycorrhizal ( AM) fungi play a key role in the nutrition of tropical trees, yet there has been little experimental investigation into the role of AM fungi in nutrient cycling via decomposing organic material in tropical forests., We evaluated the responses of AM fungi in a long-term leaf litter addition and removal experiment in a tropical forest in Panama. We described AM fungal communities using 454-pyrosequencing, quantified the proportion of root length colonised by AM fungi using microscopy, and estimated AM fungal biomass using a lipid biomarker., AM fungal community composition was altered by litter removal but not litter addition. Root colonisation was substantially greater in the superficial organic layer compared with the mineral soil. Overall colonisation was lower in the litter removal treatment, which lacked an organic layer. There was no effect of litter manipulation on the concentration of the AM fungal lipid biomarker in the mineral soil., We hypothesise that reductions in organic matter brought about by litter removal may lead to AM fungi obtaining nutrients from recalcitrant organic or mineral sources in the soil, besides increasing fungal competition for progressively limited resources. [ABSTRACT FROM AUTHOR]
Copyright of New Phytologist is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Arbuscular mycorrhizal fungal community composition is altered by long-term litter removal but not litter addition in a lowland tropical forest.
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  Data: <searchLink fieldCode="AR" term="%22Sheldrake%2C+Merlin%22">Sheldrake, Merlin</searchLink><relatesTo>1,2</relatesTo><i> merlinsheldrake@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Rosenstock%2C+Nicholas+P%2E%22">Rosenstock, Nicholas P.</searchLink><relatesTo>3,4</relatesTo><br /><searchLink fieldCode="AR" term="%22Revillini%2C+Daniel%22">Revillini, Daniel</searchLink><relatesTo>2,5</relatesTo><br /><searchLink fieldCode="AR" term="%22Olsson%2C+Pål+Axel%22">Olsson, Pål Axel</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Mangan%2C+Scott%22">Mangan, Scott</searchLink><relatesTo>2,6</relatesTo><br /><searchLink fieldCode="AR" term="%22Sayer%2C+Emma+J%2E%22">Sayer, Emma J.</searchLink><relatesTo>2,7</relatesTo><br /><searchLink fieldCode="AR" term="%22Wallander%2C+Håkan%22">Wallander, Håkan</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Turner%2C+Benjamin+L%2E%22">Turner, Benjamin L.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Tanner%2C+Edmund+V%2E+J%2E%22">Tanner, Edmund V. J.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22New+Phytologist%22">New Phytologist</searchLink>. Apr2017, Vol. 214 Issue 1, p455-467. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Vesicular-arbuscular+mycorrhizas%22">Vesicular-arbuscular mycorrhizas</searchLink><br /><searchLink fieldCode="DE" term="%22Endomycorrhizas%22">Endomycorrhizas</searchLink><br /><searchLink fieldCode="DE" term="%22Tropical+forests%22">Tropical forests</searchLink><br /><searchLink fieldCode="DE" term="%22Nutrient+cycles%22">Nutrient cycles</searchLink><br /><searchLink fieldCode="DE" term="%22Plant+nutrients%22">Plant nutrients</searchLink><br /><searchLink fieldCode="DE" term="%22Organic+compounds%22">Organic compounds</searchLink>
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  Data: Tropical forest productivity is sustained by the cycling of nutrients through decomposing organic matter. Arbuscular mycorrhizal ( AM) fungi play a key role in the nutrition of tropical trees, yet there has been little experimental investigation into the role of AM fungi in nutrient cycling via decomposing organic material in tropical forests., We evaluated the responses of AM fungi in a long-term leaf litter addition and removal experiment in a tropical forest in Panama. We described AM fungal communities using 454-pyrosequencing, quantified the proportion of root length colonised by AM fungi using microscopy, and estimated AM fungal biomass using a lipid biomarker., AM fungal community composition was altered by litter removal but not litter addition. Root colonisation was substantially greater in the superficial organic layer compared with the mineral soil. Overall colonisation was lower in the litter removal treatment, which lacked an organic layer. There was no effect of litter manipulation on the concentration of the AM fungal lipid biomarker in the mineral soil., We hypothesise that reductions in organic matter brought about by litter removal may lead to AM fungi obtaining nutrients from recalcitrant organic or mineral sources in the soil, besides increasing fungal competition for progressively limited resources. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of New Phytologist is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Organic compounds
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              Text: Apr2017
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