Chemical changes in holm oak leaf litter that was consumed by the millipede Glomeris marginata we... more Chemical changes in holm oak leaf litter that was consumed by the millipede Glomeris marginata were studied using near infrared reflectance spectroscopy. Compared to leaf litter, faecal pellets were significantly richer in lignin and poorer in nitrogen and readily assimilable constituents. The C:N ratio was significantly higher in the faeces. A NIRS-predicted index of litter decomposability was found to be
Foliage moisture content (FMC in % dry-weight) was measured in seven Mediterranean evergreen spec... more Foliage moisture content (FMC in % dry-weight) was measured in seven Mediterranean evergreen species during summer 2001. All samples were dried, ground and scanned using a NIR spectrophotometer. Two methods of calibration for FMC were compared, one using stepwise regression on selected wavelengths and the other using partial least squares (PLS) regression that takes into account all the spectral information. The PLS regression method provided a better accuracy and was thus chosen. For every species except one, PLS calibrations between spectral data a nd FMC values were accurate: r2 of the linear r egression between measured values and values predicted by the model varied from 0.93 to 0.99, standard error of cross validation (SECV) values were 3 to 6 times lower than the standard deviation (SD) of the reference values. PLS Calibration of FMC in all seven species combined was also accurate: r2 = 0.94, SD/SECV > 3. It is thus possible to measure the initial moisture content of a fre...
Page 1. REGULAR ARTICLE Plant traits, litter quality and decomposition in a Mediterranean old-fie... more Page 1. REGULAR ARTICLE Plant traits, litter quality and decomposition in a Mediterranean old-field succession Jacques Cortez Æ Eric Garnier Æ Natalia Pérez-Harguindeguy Æ Max Debussche Æ Dominique Gillon Received ...
Chemical changes in holm oak leaf litter that was consumed by the millipede Glomeris marginata we... more Chemical changes in holm oak leaf litter that was consumed by the millipede Glomeris marginata were studied using near infrared reflectance spectroscopy. Compared to leaf litter, faecal pellets were significantly richer in lignin and poorer in nitrogen and readily assimilable constituents. The C:N ratio was significantly higher in the faeces. A NIRS-predicted index of litter decomposability was found to be
Foliage moisture content (FMC in % dry-weight) was measured in seven Mediterranean evergreen spec... more Foliage moisture content (FMC in % dry-weight) was measured in seven Mediterranean evergreen species during summer 2001. All samples were dried, ground and scanned using a NIR spectrophotometer. Two methods of calibration for FMC were compared, one using stepwise regression on selected wavelengths and the other using partial least squares (PLS) regression that takes into account all the spectral information. The PLS regression method provided a better accuracy and was thus chosen. For every species except one, PLS calibrations between spectral data a nd FMC values were accurate: r2 of the linear r egression between measured values and values predicted by the model varied from 0.93 to 0.99, standard error of cross validation (SECV) values were 3 to 6 times lower than the standard deviation (SD) of the reference values. PLS Calibration of FMC in all seven species combined was also accurate: r2 = 0.94, SD/SECV > 3. It is thus possible to measure the initial moisture content of a fre...
Page 1. REGULAR ARTICLE Plant traits, litter quality and decomposition in a Mediterranean old-fie... more Page 1. REGULAR ARTICLE Plant traits, litter quality and decomposition in a Mediterranean old-field succession Jacques Cortez Æ Eric Garnier Æ Natalia Pérez-Harguindeguy Æ Max Debussche Æ Dominique Gillon Received ...
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