Towards a global arctic-alpine model for Near-infrared reflectance spectroscopy (NIRS) predictions of foliar nitrogen, phosphorus and carbon content.

ABSTRACT: Near-infrared spectroscopy (NIRS) is a high-throughput technology with potential to infer nitrogen (N), phosphorus (P) and carbon (C) content of all vascular plants based on empirical calibrations with chemical analysis, but is currently limited to the sample populations upon which it is based. Here we provide a first step towards a global arctic-alpine NIRS model of foliar N, P and C content. We found calibration models to perform well (R²_validation = 0.94 and RMSEP = 0.20% for N, R²_validation = 0.76 and RMSEP = 0.05% for P and R²_validation = 0.82 and RMSEP = 1.16% for C), integrating 97 species, nine functional groups, three levels of phenology, a range of habitats and two biogeographic regions (the Alps and Fennoscandia).

SUBMITTER: Murguzur FJA 

PROVIDER: S-EPMC6547662 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature