Jan Čermák's lifetime contribution to tree water relations.

Google Scholar Crossref Search ADS WorldCat 20 Cermák J, Kucera J, Nadezhdina N (2004) Sap flow measurements with two thermodynamic methods, flow integration within trees and scaling up from sample trees to entire forest stands. One of the giants in Czechoslovakia - now the Czech Republic - in plant water relations, Professor Jan Cermák, passed away on December 23, 2021, in Brno, Czech Republic. Cermák's focus on trees spanned from the use of an 87-m tall Liebherr 550 Crane with an 85-m jib to assess the crowns of tall trees in an old-growth I Pseudotsuga menzesii i / I Tsuga heterophylla i forest in the Washington State Cascades to under the surface roots of a 60-year-old I Quercus suber i tree in a deciduous forest near Lisbon, Portugal. This research initially (in 1993) presented a study on individual tree sap flow variation and transpiration using 24 trees ([18]) and then (in 1994 and 1995) one of the early comparisons of scaled sap flow estimates of stand transpiration with independent eddy covariance measurements ([33], [28]) and species-specific drought response ([27]). [Extracted from the article]