Please use this identifier to cite or link to this item: https://doi.org/10.1111/ele.13129
Title: Phosphatase activity and nitrogen fixation reflect species differences, not nutrient trading or nutrient balance, across tropical rainforest trees
Authors: Batterman S.A.
Hall J.S.
Turner B.L.
Hedin L.O.
LaHaela Walter J.K.
Sheldon P.
van Breugel M. 
Keywords: Biodiversity
biogeochemical niche
biogeochemistry
nitrogen
nutrient acquisition
nutrient limitation
nutrient strategy
phosphorus
tropical carbon sink
Issue Date: 2018
Publisher: Blackwell Publishing Ltd
Citation: Batterman S.A., Hall J.S., Turner B.L., Hedin L.O., LaHaela Walter J.K., Sheldon P., van Breugel M. (2018). Phosphatase activity and nitrogen fixation reflect species differences, not nutrient trading or nutrient balance, across tropical rainforest trees. Ecology Letters 21 (10) : 1486-1495. ScholarBank@NUS Repository. https://doi.org/10.1111/ele.13129
Abstract: A fundamental biogeochemical paradox is that nitrogen-rich tropical forests contain abundant nitrogen-fixing trees, which support a globally significant tropical carbon sink. One explanation for this pattern holds that nitrogen-fixing trees can overcome phosphorus limitation in tropical forests by synthesizing phosphatase enzymes to acquire soil organic phosphorus, but empirical evidence remains scarce. We evaluated whether nitrogen fixation and phosphatase activity are linked across 97 trees from seven species, and tested two hypotheses for explaining investment in nutrient strategies: trading nitrogen-for-phosphorus or balancing nutrient demand. Both strategies varied across species but were not explained by nitrogen-for-phosphorus trading or nutrient balance. This indicates that (1) studies of these nutrient strategies require broad sampling within and across species, (2) factors other than nutrient trading must be invoked to resolve the paradox of tropical nitrogen fixation, and (3) nitrogen-fixing trees cannot provide a positive nitrogen-phosphorus-carbon feedback to alleviate nutrient limitation of the tropical carbon sink. © 2018 The Authors. Ecology Letters published by CNRS and John Wiley & Sons Ltd
Source Title: Ecology Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/152088
ISSN: 1461023X
DOI: 10.1111/ele.13129
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