"000327764000001" . . "8"^^ . . . . "RIV/00020702:_____/13:#0000755!RIV14-MZE-00020702" . "IForest - Biogeosciences and Forestry" . . . "Temperatures at the margins of a young spruce stand in relation to aboveground height"@en . "6" . "2"^^ . . "P(QJ1230330)" . "Balcar, Vratislav" . . . . . . . "110278" . "2"^^ . . "IT - Italsk\u00E1 republika" . "10.3832/ifor0815-006" . . "Air temperature was monitored at a summit of the Jizerske hory Mountains (Czech Republic) in the vicinity of the northern and southern margins of a young Norway spruce stand (tree height approx. 4.5 m) at 30, 60, 90 and 140 cm aboveground. Temperature sensors were placed at height intervals selected to represent terminal shoot heights in the planting stock of different tree-height categories (seedlings, semi-saplings and saplings). As reference, a point 30 cm aboveground in an adjacent treeless gap between stands was monitored. Measurements were taken in two periods, from April to October 2010 and 2011. Differences were evaluated in terms of mean temperature characteristics of the ground air layer in the stand gap and in each station at the stand margins. Differences in temperature extremes (minimum, maximum, range) values showed more conspicuous fluctuations than differences in mean values. The observed difference in the course of daily temperature in the ground air layer (up to 30 cm aboveground) between the stand gap and the southern margin of the spruce stand was small. The ground layer of air at the northern margin was markedly colder and showed a more stable course of temperatures. Decreasing temperature fluctuations were observed as distance from the ground increases, and frequency and intensity of ground frosts also decreased with sensors' height. At 140 cm aboveground (i.e., at approximately one-third of the spruce stand's height), differences between daily temperature characteristics at the southern and northern stand margins were small over the growing period, and the occurrence of late or early frosts showed comparable frequencies. In conclusion, higher risk of damage to small-sized planting stock due to temperature stress was confirmed for higher mountain elevations."@en . "RIV/00020702:_____/13:#0000755" . "Air temperature was monitored at a summit of the Jizerske hory Mountains (Czech Republic) in the vicinity of the northern and southern margins of a young Norway spruce stand (tree height approx. 4.5 m) at 30, 60, 90 and 140 cm aboveground. Temperature sensors were placed at height intervals selected to represent terminal shoot heights in the planting stock of different tree-height categories (seedlings, semi-saplings and saplings). As reference, a point 30 cm aboveground in an adjacent treeless gap between stands was monitored. Measurements were taken in two periods, from April to October 2010 and 2011. Differences were evaluated in terms of mean temperature characteristics of the ground air layer in the stand gap and in each station at the stand margins. Differences in temperature extremes (minimum, maximum, range) values showed more conspicuous fluctuations than differences in mean values. The observed difference in the course of daily temperature in the ground air layer (up to 30 cm aboveground) between the stand gap and the southern margin of the spruce stand was small. The ground layer of air at the northern margin was markedly colder and showed a more stable course of temperatures. Decreasing temperature fluctuations were observed as distance from the ground increases, and frequency and intensity of ground frosts also decreased with sensors' height. At 140 cm aboveground (i.e., at approximately one-third of the spruce stand's height), differences between daily temperature characteristics at the southern and northern stand margins were small over the growing period, and the occurrence of late or early frosts showed comparable frequencies. In conclusion, higher risk of damage to small-sized planting stock due to temperature stress was confirmed for higher mountain elevations." . "Temperatures at the margins of a young spruce stand in relation to aboveground height" . "air temperature; forest stand gaps; mountains; temperature stress"@en . "1971-7458" . . "Temperatures at the margins of a young spruce stand in relation to aboveground height"@en . "Jul 16 2013" . . "http://www.sisef.it/iforest/pdf/?id=ifor0815-006" . . "\u0160pul\u00E1k, Ond\u0159ej" . "Temperatures at the margins of a young spruce stand in relation to aboveground height" . "[2ECA187F6C8B]" .