152
Penuelas J, Filella I, Biel C, Serrano L, Save R (1993) The reflectance at the 950–970 nm region as
an indicator of plant water status. Int J Remote Sens 14(10):1887–1905
Penuelas J, Gamon JA, Fredeen AL, Merino J, Field CB (1994) Reflectance indices associated
with physiological changes in nitrogen-limited and water-limited sunflower leaves. Remote
Sens Environ 48(2):135–146. https://doi.org/10.1016/0034-4257(94)90136-8
Penuelas J, Baret F, Filella I (1995) Semi-empirical indices to assess carotenoids/chlorophyll a
ratio from leaf spectral reflectance. Photosynthetica 31:221–230
Pietrzykowski E, Stone C, Pinkard E, Mohammed C (2006) Effects of Mycosphaerella leaf disease on the spectral reflectance properties of juvenile Eucalyptus globulus foliage. For Pathog
36(5):334–348
Pinty B, Leprieur C, Verstraete MM (1993) Towards a quantitative interpretation of vegetation indices.
Part I. Biophysical canopy properties and classical indices. Remote Sens Rev 7:127–150
Pontius J (2014) A new approach for forest decline assessments: maximizing detail and accuracy
with multispectral imagery. Int J Remote Sens 35(9):3384–3402. https://doi.org/10.1080/014
31161.2014.903439
Pontius J, Hallett R (2014) Comprehensive methods for earlier detection and monitoring of forest
decline. For Sci 60(6):1156–1163. https://doi.org/10.5849/forsci.13-121
Pontius J, Hallett R, Martin M (2005a) Assessing hemlock decline using visible and near-infrared
spectroscopy: indices comparison and algorithm development. Appl Spectrosc 59(6):836–843.
https://doi.org/10.1366/0003702054280595
Pontius J, Hallett R, Martin M (2005b) Using AVIRIS to assess hemlock abundance and early
decline in the Catskills, New York. Remote Sens Environ 97(2):163–173. https://doi.
org/10.1016/j.rse.2005.04.011
Pontius JA, Hallett RA, Jenkins JC (2006) Foliar chemistry linked to infestation and susceptibility
to hemlock woolly adelgid (Homoptera: Adelgidae). Environ Entomol 35(1):112–120
Pontius J, Martin M, Plourde L, Hallett R (2008) Ash decline assessment in emerald ash borerinfested regions: a test of tree-level, hyperspectral technologies. Remote Sens Environ
112(5):2665–2676. https://doi.org/10.1016/j.rse.2007.12.011
Pontius J, Halman JM, Schaberg PG (2016) Seventy years of forest growth and community
dynamics in an undisturbed northern hardwood forest. Can J For Res 46(7):959–967. https://
doi.org/10.1139/cjfr-2015-0304
Pontius J, Hanavan RP, Hallett RA, Cook BD, Corp LA (2017) High spatial resolution spectral
unmixing for mapping ash species across a complex urban environment. Remote Sens Environ
199:360–369
Porter WM, Enmark HT (1987) A system overview of the airborne visible/infrared imaging spectrometer (AVIRIS). In: Imaging Spectroscopy II, vol 834. International Society for Optics and
Photonics, Bellingham, WA. pp 22–32
Qi J, Chehbouni A, Huete AR, Kerr YH, Sorooshian S (1994) A modified soil adjusted vegetation
index. Remote Sens Environ 48(2):119–126. https://doi.org/10.1016/0034-4257(94)90134-1
Rahman AF, Gamon JA, Fuentes DA, Roberts DA, Prentiss D (2001) Modeling spatially distributed ecosystem flux of boreal forest using hyperspectral indices from AVIRIS imagery.
J Geophys Res-Atmos 106(D24):33579–33591
Rock BN, Vogelmann AF, Williams DL, Vogelmann DL, Hoshizaki T (1986) Remote detection of
forest damage. Bioscience 36(7):439–445
Rock BN, Hoshizaki T, Miller JR (1988) Comparison of in situ and airborne spectral measurements of the blue shift associated with forest decline. Remote Sens Environ 24(1):109–127
Rondeaux G, Steven M, Baret F (1996) Optimization of soil-adjusted vegetation indices. Remote
Sens Environ 55(2):95–107. https://doi.org/10.1016/0034-4257(95)00186-7
Roujean J-L, Breon F-M (1995) Estimating PAR absorbed by vegetation from bidirectional reflectance measurements. Remote Sens Environ 51(3):375–384
Rouse J, Hass R, Schell J, Deering D, Harlan J (1974) Monitoring the vernal advancement and
retrogradation of natural vegetation. NASA Report, Greenbelt, MD
Schaberg PG, Dehayes DH, Hawley GJ (2001) Anthropogenic calcium depletion: a unique threat
to forest ecosystem health? Ecosyst Health 7(4):214–228
J. Pontius et al.
Penuelas J, Filella I, Biel C, Serrano L, Save R (1993) The reflectance at the 950–970 nm region as
an indicator of plant water status. Int J Remote Sens 14(10):1887–1905
Penuelas J, Gamon JA, Fredeen AL, Merino J, Field CB (1994) Reflectance indices associated
with physiological changes in nitrogen-limited and water-limited sunflower leaves. Remote
Sens Environ 48(2):135–146. https://doi.org/10.1016/0034-4257(94)90136-8
Penuelas J, Baret F, Filella I (1995) Semi-empirical indices to assess carotenoids/chlorophyll a
ratio from leaf spectral reflectance. Photosynthetica 31:221–230
Pietrzykowski E, Stone C, Pinkard E, Mohammed C (2006) Effects of Mycosphaerella leaf disease on the spectral reflectance properties of juvenile Eucalyptus globulus foliage. For Pathog
36(5):334–348
Pinty B, Leprieur C, Verstraete MM (1993) Towards a quantitative interpretation of vegetation indices.
Part I. Biophysical canopy properties and classical indices. Remote Sens Rev 7:127–150
Pontius J (2014) A new approach for forest decline assessments: maximizing detail and accuracy
with multispectral imagery. Int J Remote Sens 35(9):3384–3402. https://doi.org/10.1080/014
31161.2014.903439
Pontius J, Hallett R (2014) Comprehensive methods for earlier detection and monitoring of forest
decline. For Sci 60(6):1156–1163. https://doi.org/10.5849/forsci.13-121
Pontius J, Hallett R, Martin M (2005a) Assessing hemlock decline using visible and near-infrared
spectroscopy: indices comparison and algorithm development. Appl Spectrosc 59(6):836–843.
https://doi.org/10.1366/0003702054280595
Pontius J, Hallett R, Martin M (2005b) Using AVIRIS to assess hemlock abundance and early
decline in the Catskills, New York. Remote Sens Environ 97(2):163–173. https://doi.
org/10.1016/j.rse.2005.04.011
Pontius JA, Hallett RA, Jenkins JC (2006) Foliar chemistry linked to infestation and susceptibility
to hemlock woolly adelgid (Homoptera: Adelgidae). Environ Entomol 35(1):112–120
Pontius J, Martin M, Plourde L, Hallett R (2008) Ash decline assessment in emerald ash borerinfested regions: a test of tree-level, hyperspectral technologies. Remote Sens Environ
112(5):2665–2676. https://doi.org/10.1016/j.rse.2007.12.011
Pontius J, Halman JM, Schaberg PG (2016) Seventy years of forest growth and community
dynamics in an undisturbed northern hardwood forest. Can J For Res 46(7):959–967. https://
doi.org/10.1139/cjfr-2015-0304
Pontius J, Hanavan RP, Hallett RA, Cook BD, Corp LA (2017) High spatial resolution spectral
unmixing for mapping ash species across a complex urban environment. Remote Sens Environ
199:360–369
Porter WM, Enmark HT (1987) A system overview of the airborne visible/infrared imaging spectrometer (AVIRIS). In: Imaging Spectroscopy II, vol 834. International Society for Optics and
Photonics, Bellingham, WA. pp 22–32
Qi J, Chehbouni A, Huete AR, Kerr YH, Sorooshian S (1994) A modified soil adjusted vegetation
index. Remote Sens Environ 48(2):119–126. https://doi.org/10.1016/0034-4257(94)90134-1
Rahman AF, Gamon JA, Fuentes DA, Roberts DA, Prentiss D (2001) Modeling spatially distributed ecosystem flux of boreal forest using hyperspectral indices from AVIRIS imagery.
J Geophys Res-Atmos 106(D24):33579–33591
Rock BN, Vogelmann AF, Williams DL, Vogelmann DL, Hoshizaki T (1986) Remote detection of
forest damage. Bioscience 36(7):439–445
Rock BN, Hoshizaki T, Miller JR (1988) Comparison of in situ and airborne spectral measurements of the blue shift associated with forest decline. Remote Sens Environ 24(1):109–127
Rondeaux G, Steven M, Baret F (1996) Optimization of soil-adjusted vegetation indices. Remote
Sens Environ 55(2):95–107. https://doi.org/10.1016/0034-4257(95)00186-7
Roujean J-L, Breon F-M (1995) Estimating PAR absorbed by vegetation from bidirectional reflectance measurements. Remote Sens Environ 51(3):375–384
Rouse J, Hass R, Schell J, Deering D, Harlan J (1974) Monitoring the vernal advancement and
retrogradation of natural vegetation. NASA Report, Greenbelt, MD
Schaberg PG, Dehayes DH, Hawley GJ (2001) Anthropogenic calcium depletion: a unique threat
to forest ecosystem health? Ecosyst Health 7(4):214–228
J. Pontius et al.