Effects of Climate on Douglas-fir (<i>Pseudotsuga menziesii</i> (Mirb.) Franco) Growth Southeast of the European Alps

Douglas-fir (<i>Pseudotsuga menziesii</i> (Mirb.) Franco) is a non-native tree species in Slovenia with the potential to partially replace Norway spruce in our native forests. Compared to spruce, it has several advantages in terms of volume growth, wood quality and tolerance to drought....

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Main Authors: Tom Levanič, Hana Štraus
Format: Article
Language:English
Published: MDPI AG 2022-06-01
Series:Plants
Subjects:
Online Access:https://www.mdpi.com/2223-7747/11/12/1571
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author Tom Levanič
Hana Štraus
author_facet Tom Levanič
Hana Štraus
author_sort Tom Levanič
collection DOAJ
description Douglas-fir (<i>Pseudotsuga menziesii</i> (Mirb.) Franco) is a non-native tree species in Slovenia with the potential to partially replace Norway spruce in our native forests. Compared to spruce, it has several advantages in terms of volume growth, wood quality and tolerance to drought. This is important given the changing climate in which spruce is confronted with serious problems caused by increasing temperatures and drought stress. At three sites (one on non-carbonate bedrock and deep soils, and two on limestone with soil layers of varying depths), 20 Douglas-fir and 20 spruce per site were sampled in order to compare their radial growth response to climate and drought events. The radial growth of Douglas-fir exceeds that of spruce by about 20% on comparable sites. It is more responsive to climate than spruce. Above-average temperatures in February and March have a significant positive effect on the radial growth of Douglas-fir. In recent decades, above-average summer precipitation has also had a positive influence on the radial growth of Douglas-fir. Compared to spruce, Douglas-fir is less sensitive to extreme drought events. Our results indicate that Douglas-fir may be a good substitute for spruce in semi-natural managed forest stands in Slovenia. The planting of Douglas-fir should be allowed in Slovenian forests, but the proportion of it in forest stands should be kept lower than is the case with spruce today.
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spelling doaj.art-db970dff35ca43268026faa9ef50faa52023-11-23T18:34:44ZengMDPI AGPlants2223-77472022-06-011112157110.3390/plants11121571Effects of Climate on Douglas-fir (<i>Pseudotsuga menziesii</i> (Mirb.) Franco) Growth Southeast of the European AlpsTom Levanič0Hana Štraus1Department of Forest Yield and Silviculture, Slovenian Forestry Institute, Večna Pot 2, SI-1000 Ljubljana, SloveniaDepartment of Forestry and Renewable Forest Resources, Biotechnical Faculty, University of Ljubljana, Večna Pot 83, SI-1000 Ljubljana, SloveniaDouglas-fir (<i>Pseudotsuga menziesii</i> (Mirb.) Franco) is a non-native tree species in Slovenia with the potential to partially replace Norway spruce in our native forests. Compared to spruce, it has several advantages in terms of volume growth, wood quality and tolerance to drought. This is important given the changing climate in which spruce is confronted with serious problems caused by increasing temperatures and drought stress. At three sites (one on non-carbonate bedrock and deep soils, and two on limestone with soil layers of varying depths), 20 Douglas-fir and 20 spruce per site were sampled in order to compare their radial growth response to climate and drought events. The radial growth of Douglas-fir exceeds that of spruce by about 20% on comparable sites. It is more responsive to climate than spruce. Above-average temperatures in February and March have a significant positive effect on the radial growth of Douglas-fir. In recent decades, above-average summer precipitation has also had a positive influence on the radial growth of Douglas-fir. Compared to spruce, Douglas-fir is less sensitive to extreme drought events. Our results indicate that Douglas-fir may be a good substitute for spruce in semi-natural managed forest stands in Slovenia. The planting of Douglas-fir should be allowed in Slovenian forests, but the proportion of it in forest stands should be kept lower than is the case with spruce today.https://www.mdpi.com/2223-7747/11/12/1571climate changeclimate responsedroughtradial incrementdendrochronology
spellingShingle Tom Levanič
Hana Štraus
Effects of Climate on Douglas-fir (<i>Pseudotsuga menziesii</i> (Mirb.) Franco) Growth Southeast of the European Alps
Plants
climate change
climate response
drought
radial increment
dendrochronology
title Effects of Climate on Douglas-fir (<i>Pseudotsuga menziesii</i> (Mirb.) Franco) Growth Southeast of the European Alps
title_full Effects of Climate on Douglas-fir (<i>Pseudotsuga menziesii</i> (Mirb.) Franco) Growth Southeast of the European Alps
title_fullStr Effects of Climate on Douglas-fir (<i>Pseudotsuga menziesii</i> (Mirb.) Franco) Growth Southeast of the European Alps
title_full_unstemmed Effects of Climate on Douglas-fir (<i>Pseudotsuga menziesii</i> (Mirb.) Franco) Growth Southeast of the European Alps
title_short Effects of Climate on Douglas-fir (<i>Pseudotsuga menziesii</i> (Mirb.) Franco) Growth Southeast of the European Alps
title_sort effects of climate on douglas fir i pseudotsuga menziesii i mirb franco growth southeast of the european alps
topic climate change
climate response
drought
radial increment
dendrochronology
url https://www.mdpi.com/2223-7747/11/12/1571
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