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Title: Informing models through empirical relationships between foliar phosphorus, nitrogen and photosynthesis across diverse woody species in tropical forests of Panama

Journal Article · · New Phytologist
DOI:https://doi.org/10.1111/nph.14319· OSTI ID:1376318
 [1];  [1];  [1];  [2];  [3];  [1];  [1];  [1];  [4];  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Linnaeus Univ., Vaxjo (Sweden)
  3. Smithsonian Tropical Research Institute, Ancon (Panama)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Summary Our objective was to analyze and summarize data describing photosynthetic parameters and foliar nutrient concentrations from tropical forests in Panama to inform model representation of phosphorus (P) limitation of tropical forest productivity. Gas exchange and nutrient content data were collected from 144 observations of upper canopy leaves from at least 65 species at two forest sites in Panama, differing in species composition, rainfall and soil fertility. Photosynthetic parameters were derived from analysis of assimilation rate vs internal CO 2 concentration curves ( A / C i ), and relationships with foliar nitrogen (N) and P content were developed. The relationships between area‐based photosynthetic parameters and nutrients were of similar strength for N and P and robust across diverse species and site conditions. The strongest relationship expressed maximum electron transport rate ( J max ) as a multivariate function of both N and P, and this relationship was improved with the inclusion of independent data on wood density. Models that estimate photosynthesis from foliar N would be improved only modestly by including additional data on foliar P, but doing so may increase the capability of models to predict future conditions in P‐limited tropical forests, especially when combined with data on edaphic conditions and other environmental drivers.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1376318
Alternate ID(s):
OSTI ID: 1787093
Journal Information:
New Phytologist, Vol. 215, Issue 4; ISSN 0028-646X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 43 works
Citation information provided by
Web of Science

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Cited By (11)

Co-regulation of photosynthetic capacity by nitrogen, phosphorus and magnesium in a subtropical Karst forest in China journal May 2018
Leaf-level photosynthetic capacity dynamics in relation to soil and foliar nutrients along forest–savanna boundaries in Ghana and Brazil journal November 2018
The impact of alternative trait-scaling hypotheses for the maximum photosynthetic carboxylation rate ( V cmax ) on global gross primary production journal June 2017
Towards a more physiological representation of vegetation phosphorus processes in land surface models journal February 2019
Terrestrial biosphere models may overestimate Arctic CO 2 assimilation if they do not account for decreased quantum yield and convexity at low temperature journal March 2019
Leaf reflectance spectroscopy captures variation in carboxylation capacity across species, canopy environment and leaf age in lowland moist tropical forests journal June 2019
In situ temperature relationships of biochemical and stomatal controls of photosynthesis in four lowland tropical tree species journal October 2017
The “one‐point method” for estimating maximum carboxylation capacity of photosynthesis: A cautionary tale journal June 2019
The biophysics, ecology, and biogeochemistry of functionally diverse, vertically and horizontally heterogeneous ecosystems: the Ecosystem Demography model, version 2.2 – Part 1: Model description journal January 2019
Leaf-level photosynthetic capacity dynamics in relation to soil and foliar nutrients along forest–savanna boundaries in Ghana and Brazil journal December 2018
Photosynthesis of subtropical forest species from different successional status in relation to foliar nutrients and phosphorus fractions journal July 2018