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Variable Responses of Lowland Tropical Forest Nutrient Status to Fertilization and Litter Manipulation

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dc.contributor.author Sayer, Emma J. en
dc.contributor.author Wright, S. Joseph en
dc.contributor.author Tanner, Edmund V. J. en
dc.contributor.author Yavitt, Joseph B. en
dc.contributor.author Harms, Kyle Edward en
dc.contributor.author Powers, Jennifer S. en
dc.contributor.author Kaspari, Michael E. en
dc.contributor.author Garcia, Milton N. en
dc.contributor.author Turner, Benjamin L. en
dc.date.accessioned 2012-06-28T17:34:03Z
dc.date.available 2012-06-28T17:34:03Z
dc.date.issued 2012
dc.identifier.citation Sayer, Emma J., Wright, S. Joseph, Tanner, Edmund V. J., Yavitt, Joseph B., Harms, Kyle Edward, Powers, Jennifer S., Kaspari, Michael E., Garcia, Milton N., and Turner, Benjamin L. 2012. "<a href="https://repository.si.edu/handle/10088/18529">Variable Responses of Lowland Tropical Forest Nutrient Status to Fertilization and Litter Manipulation</a>." <em>Ecosystems</em>. 15 (3):387&ndash;400. <a href="https://doi.org/10.1007/s10021-011-9516-9">https://doi.org/10.1007/s10021-011-9516-9</a> en
dc.identifier.issn 1432-9840
dc.identifier.uri http://hdl.handle.net/10088/18529
dc.description.abstract Predicting future impacts of anthropogenic change on tropical forests requires a clear understanding of nutrient constraints on productivity. We compared experimental fertilization and litter manipulation treatments in an old-growth lowland tropical forest to distinguish between the effects of inorganic nutrient amendments and changes in nutrient cycling via litterfall. We measured the changes in soil and litter nutrient pools, litterfall, and fine root biomass in plots fertilized with nitrogen (N), phosphorus (P), or potassium (K), and in litter addition and litter removal treatments during 7 years. Soil inorganic N and litter N increased in double-litter plots but not in N-fertilized plots. Conversely, litter P and soil pools of P and K increased in fertilized plots but not in the double-litter plots. Soil and litter pools of N and K decreased in the no-litter plots. Changes in litterfall with added nutrients or litter were only marginally significant, but fine root biomass decreased with both the litter and the K addition. Differences between the two experiments are mostly attributable to the coupled cycling of carbon and nutrients in litter. Increased nutrient inputs in litter may improve plant uptake of some nutrients compared to fertilization with similar amounts. The litter layer also appears to play a key role in nutrient retention. We discuss our findings in the context of possible impacts of anthropogenic change on tropical forests. en
dc.relation.ispartof Ecosystems en
dc.title Variable Responses of Lowland Tropical Forest Nutrient Status to Fertilization and Litter Manipulation en
dc.type Journal Article en
dc.identifier.srbnumber 111559
dc.identifier.doi 10.1007/s10021-011-9516-9
rft.jtitle Ecosystems
rft.volume 15
rft.issue 3
rft.spage 387
rft.epage 400
dc.description.SIUnit Peer-Reviewed en
dc.description.SIUnit STRI en
dc.citation.spage 387
dc.citation.epage 400

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