Canopy phylogenetic, chemical and spectral assembly in a lowland Amazonian forest

Research output: Contribution to journalArticle

117 Citations (Scopus)

Abstract

Canopy chemistry and spectroscopy offer insight into community assembly and ecosystem processes in high-diversity tropical forests, but phylogenetic and environmental factors controlling chemical traits underpinning spectral signatures remain poorly understood. We measured 21 leaf chemical traits and spectroscopic signatures of 594 canopy individuals on high-fertility Inceptisols and low-fertility Ultisols in a lowland Amazonian forest. The spectranomics approach, which explicitly connects phylogenetic, chemical and spectral patterns in tropical canopies, provided the basis for analysis. Intracrown and intraspecific variation in chemical traits varied from 1.4 to 36.7% (median 9.3%), depending upon the chemical constituent. Principal components analysis showed that 14 orthogonal combinations were required to explain 95% of the variation among 21 traits, indicating the high dimensionality of canopy chemical signatures among taxa. Inceptisols and lianas were associated with high leaf nutrient concentrations and low concentrations of defense compounds. Independent of soils or plant habit, an average 70% (maximum 89%) of chemical trait variation was explained by taxonomy. At least 10 traits were quantitatively linked to remotely sensed signatures, which provided highly accurate species classification. The results suggest that taxa found on fertile soils carry chemical portfolios with a deep evolutionary history, whereas taxa found on low-fertility soils have undergone trait evolution at the species level. Spectranomics provides a new connection between remote sensing and community assembly theory in high-diversity tropical canopies.

Original languageEnglish (US)
Pages (from-to)999-1012
Number of pages14
JournalNew Phytologist
Volume189
Issue number4
DOIs
StatePublished - Mar 1 2011
Externally publishedYes

Fingerprint

Fertility
lowlands
Soil
canopy
phylogeny
soil fertility
Inceptisols
Principal Component Analysis
Habits
Ecosystem
Spectrum Analysis
taxonomy
History
lianas
Ultisols
Food
plant architecture
tropical forests
remote sensing
leaves

Keywords

  • Amazon
  • Community assembly
  • Leaf chemistry
  • Leaf traits
  • Peru
  • Remote sensing
  • Spectranomics
  • Tropical forest

ASJC Scopus subject areas

  • Physiology
  • Plant Science

Cite this

Canopy phylogenetic, chemical and spectral assembly in a lowland Amazonian forest. / Asner, Gregory P.; Martin, Roberta E.

In: New Phytologist, Vol. 189, No. 4, 01.03.2011, p. 999-1012.

Research output: Contribution to journalArticle

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