Quantification of Plant Root Species Composition in Peatlands Using FTIR Spectroscopy

Frontiers in Plant Science
Petra StrakováRaija Laiho

Abstract

Evidence of plant root biomass and production in peatlands at the level of species or plant functional type (PFT) is needed for defining ecosystem functioning and predicting its future development. However, such data are limited due to methodological difficulties and the toilsomeness of separating roots from peat. We developed Fourier transform infrared (FTIR) spectroscopy based calibration models for quantifying the mass proportions of several common peatland species, and alternatively, the PFTs that these species represented, in composite root samples. We further tested whether woody roots could be classified into diameter classes, and whether dead and living roots could be separated. We aimed to solve whether general models applicable in different studies can be developed, and what would be the best way to build such models. FTIR spectra were measured from dried and powdered roots: both "pure roots", original samples of 25 species collected in the field, and "root mixtures", artificial composite samples prepared by mixing known amounts of pure roots of different species. Partial least squares regression was used to build the calibration models. The general applicability of the models was tested using roots collected in diffe...Continue Reading

References

May 16, 2006·Trends in Ecology & Evolution·Mark Westoby, Ian J Wright
Sep 18, 2013·The Science of the Total Environment·Robert JandlFranco Miglietta
Oct 17, 2013·Frontiers in Plant Science·Boris Rewald, Catharina Meinen
Jul 22, 2014·Global Change Biology·Sofyan KurniantoSteve Frolking
Oct 11, 2014·Oecologia·Timo DomischKarsten Raulund-Rasmussen
Oct 21, 2015·Frontiers in Plant Science·Catharina Meinen, Rolf Rauber
Nov 1, 1996·Oecologia·R B JacksonE D Schulze
Jun 29, 2018·Frontiers in Plant Science·Nicole LegnerRolf Rauber

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Methods Mentioned

BETA
infrared spectroscopy
PCA

Software Mentioned

Canoco
Unscrambler

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