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Antarctic moss stress assessment based on chlorophyll content and leaf density retrieved from imaging spectroscopy data

Citation

Malenovsky, Z and Turnbull, JD and Lucieer, A and Robinson, SA, Antarctic moss stress assessment based on chlorophyll content and leaf density retrieved from imaging spectroscopy data, New Phytologist, 208, (2) pp. 608-624. ISSN 1469-8137 (2015) [Refereed Article]

Copyright Statement

Copyright 2015 New Phytologist Trust

DOI: doi:10.1111/nph.13524

Abstract

  • The health of several East Antarctic moss-beds is declining as liquid water availability is reduced due to recent environmental changes. Consequently, a noninvasive and spatially explicit method is needed to assess the vigour of mosses spread throughout rocky Antarctic landscapes. Here, we explore the possibility of using near-distance imaging spectroscopy for spatial assessment of moss-bed health.
  • Turf chlorophyll a and b, water content and leaf density were selected as quantitative stress indicators. Reflectance of three dominant Antarctic mosses Bryum pseudotriquetrum, Ceratodon purpureus and Schistidium antarctici was measured during a drought-stress and recovery laboratory experiment and also with an imaging spectrometer outdoors on water-deficient (stressed) and well-watered (unstressed) moss test sites. The stress-indicating moss traits were derived from visible and near infrared turf reflectance using a nonlinear support vector regression.
  • Laboratory estimates of chlorophyll content and leaf density were achieved with the lowest systematic/unsystematic root mean square errors of 38.0/235.2 nmol g−1 DW and 0.8/1.6 leaves mm−1, respectively. Subsequent combination of these indicators retrieved from field hyperspectral images produced small-scale maps indicating relative moss vigour.
  • Once applied and validated on remotely sensed airborne spectral images, this methodology could provide quantitative maps suitable for long-term monitoring of Antarctic moss-bed health.
  • Item Details

    Item Type:Refereed Article
    Keywords:Antarctic moss, spectroscopy, health, hyperspectral remote sensing, Bryum pseudotriquetrum, Ceratodon purpureus, leaf density, moss chlorophyll content, Schistidium antarctici, stress imaging spectroscopy, turf water content
    Research Division:Engineering
    Research Group:Geomatic Engineering
    Research Field:Photogrammetry and Remote Sensing
    Objective Division:Environment
    Objective Group:Ecosystem Assessment and Management
    Objective Field:Ecosystem Assessment and Management of Antarctic and Sub-Antarctic Environments
    Author:Malenovsky, Z (Dr Zbynek Malenovsky)
    Author:Lucieer, A (Associate Professor Arko Lucieer)
    ID Code:101280
    Year Published:2015
    Funding Support:Australian Research Council (DP110101714)
    Web of Science® Times Cited:12
    Deposited By:Geography and Environmental Studies
    Deposited On:2015-06-16
    Last Modified:2017-10-25
    Downloads:0

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