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Laser scanning reveals bryophyte canopy structure
Author(s) -
Rice Steven K.,
Gutman Claudia,
Krouglicof Nicholas
Publication year - 2005
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.2005.01327.x
Subject(s) - bryophyte , laser scanning , laser , canopy , materials science , remote sensing , analytical chemistry (journal) , optics , environmental science , botany , chemistry , physics , biology , environmental chemistry , geology
Summary• We evaluated laser scanning as a method to provide depth measurements for bryophyte canopies at fine spatial scales to derive surface roughness ( L r ), a structural parameter. • Depths to the first vertical canopy contact were measured on 5 × 5 cm 2 areas of 27 bryophyte canopies using a contact probe, a commercial laser scanner and a scanner employing a laser diode striper (LED scanner). Laser scanning adequately distinguished structural types, but scanner configuration led to differences in the magnitude of L r . • LED scanning did not damage photosystem II function in three bryophyte species, Bazzania trilobata , Sphagnum girgensohnii and Pleurozium schreberi , as evidenced by no change in the chlorophyll fluorescence parameter F V / F M following LED scanning, but a decrease when subjected to high light. • A previously published boundary layer conductance model was parameterized with surface roughness values determined using a laser scanner and compared with the results obtained with contact probe measures. The resulting parameters of the functional models did not differ significantly from each other.