Global biogeography of autotroph chemistry: Is insolation a driving force?

Elizabeth T. Borer, Matthew E S Bracken, Eric W. Seabloom, Jennifer E. Smith, Just Cebrian, Elsa E. Cleland, James Elser, William F. Fagan, Daniel S. Gruner, W. Stanley Harpole, Helmut Hillebrand, Andrew J. Kerkhoff, Jacqueline T. Ngai

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Synthesis The tissue chemistry of plants can influence ecosystem processes including growth, herbivory, and decomposition. Our comparison of nitrogen and phosphorus in over 1700 autotroph taxa demonstrates that latitudinal trends in tissue chemistry are consistent across non-vascular and vascular species in freshwater, terrestrial, and marine ecosystems. Tissue chemistry varies most within species and taxonomic lineages, yet the nitrogen to phosphorus ratio within individuals is strikingly similar among species in different ecosystems. These results shed new light on existing hypotheses, suggesting that light (e.g. photon flux) and growing season duration are primary drivers of latitudinal gradients in tissue chemistry, but providing little support for temperature, nutrient supply, or soil substrate age. Photoautotroph nitrogen (N) and phosphorus (P) tissue concentrations can influence ecosystem function via processes including growth, decomposition, and consumption, and may reflect traits maintaining coexistence. Studies in terrestrial systems have led to hypotheses that latitudinal trends in the N and P content of leaves may be driven by soil substrate age, environmental temperature, or season length; however, terrestrial patterns alone cannot differentiate these mechanisms. Here, we demonstrate that broad geographical patterns of N and P in freshwater and marine multicellular photoautotrophs are concordant with those in terrestrial ecosystems. Our > 6800 record database reveals that mean tissue N and P increase with latitude in all ecosystems, but P increases more rapidly, causing N:P to decline; mean N:P scaling within individuals also is identical among systems, despite very different evolutionary environments. A partitioning of the variance in these data suggests that species composition and local environmental context likely lead to the variation observed within a latitudinal band. However, the consistency of trends in photosynthetic tissue chemistry across Earth's ecosystems suggests that biogeographical gradients in insolation and growing season length may constrain tissue N and P, whereas global trends in temperature, nutrient supply, and soil substrate age are unlikely to generate the consistent latitudinal trends among ecosystems. Thus, this cross-ecosystem comparison suggests a new hypothesis, global patterns of insolation, while also providing a new perspective on other mechanisms that have been hypothesized to underlie latitudinal trends in photosynthetic tissue chemistry.

Original languageEnglish (US)
Pages (from-to)1121-1130
Number of pages10
JournalOikos
Volume122
Issue number8
DOIs
StatePublished - Aug 2013

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autotrophs
insolation
biogeography
solar radiation
chemistry
ecosystems
ecosystem
phosphorus
terrestrial ecosystem
substrate
nitrogen
growing season
decomposition
tissues
tissue
soil
plant biochemistry
degradation
nutrient
temperature

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

Cite this

Borer, E. T., Bracken, M. E. S., Seabloom, E. W., Smith, J. E., Cebrian, J., Cleland, E. E., ... Ngai, J. T. (2013). Global biogeography of autotroph chemistry: Is insolation a driving force? Oikos, 122(8), 1121-1130. https://doi.org/10.1111/j.1600-0706.2013.00465.x

Global biogeography of autotroph chemistry : Is insolation a driving force? / Borer, Elizabeth T.; Bracken, Matthew E S; Seabloom, Eric W.; Smith, Jennifer E.; Cebrian, Just; Cleland, Elsa E.; Elser, James; Fagan, William F.; Gruner, Daniel S.; Harpole, W. Stanley; Hillebrand, Helmut; Kerkhoff, Andrew J.; Ngai, Jacqueline T.

In: Oikos, Vol. 122, No. 8, 08.2013, p. 1121-1130.

Research output: Contribution to journalArticle

Borer, ET, Bracken, MES, Seabloom, EW, Smith, JE, Cebrian, J, Cleland, EE, Elser, J, Fagan, WF, Gruner, DS, Harpole, WS, Hillebrand, H, Kerkhoff, AJ & Ngai, JT 2013, 'Global biogeography of autotroph chemistry: Is insolation a driving force?', Oikos, vol. 122, no. 8, pp. 1121-1130. https://doi.org/10.1111/j.1600-0706.2013.00465.x
Borer ET, Bracken MES, Seabloom EW, Smith JE, Cebrian J, Cleland EE et al. Global biogeography of autotroph chemistry: Is insolation a driving force? Oikos. 2013 Aug;122(8):1121-1130. https://doi.org/10.1111/j.1600-0706.2013.00465.x
Borer, Elizabeth T. ; Bracken, Matthew E S ; Seabloom, Eric W. ; Smith, Jennifer E. ; Cebrian, Just ; Cleland, Elsa E. ; Elser, James ; Fagan, William F. ; Gruner, Daniel S. ; Harpole, W. Stanley ; Hillebrand, Helmut ; Kerkhoff, Andrew J. ; Ngai, Jacqueline T. / Global biogeography of autotroph chemistry : Is insolation a driving force?. In: Oikos. 2013 ; Vol. 122, No. 8. pp. 1121-1130.
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