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

journal contribution
posted on 2023-05-18, 11:03 authored by Zbynek Malenovsky, Turnbull, JD, Arko LucieerArko Lucieer, Robinson, SA
  • 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.

    • Funding

    Australian Research Council

    History

    Publication title

    New Phytologist

    Volume

    208

    Pagination

    608-624

    ISSN

    1469-8137

    Department/School

    School of Geography, Planning and Spatial Sciences

    Publisher

    Blackwell Publishing Ltd

    Place of publication

    9600 Garsington Rd, Oxford, England, Oxon, Ox4 2Dg

    Rights statement

    Copyright? 2015 New Phytologist Trust

    Repository Status

    • Restricted

    Socio-economic Objectives

    Assessment and management of coastal and estuarine ecosystems

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      University Of Tasmania

      Categories

      Keywords

      Antarctic mossspectroscopyhealthhyperspectral remote sensingBryum pseudotriquetrumCeratodon purpureusleaf densitymoss chlorophyll contentSchistidium antarcticistress imaging spectroscopyturf water content

      Licence

      In Copyright

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