Thinning effects on pine-spruce forest transpiration in central Sweden
Lagergren, Fredrik LU ; Lankreijer, Harry LU
; Kucera, Jiri
; Cienciala, Emil
; Mölder, Meelis
LU
and Lindroth, Anders
LU
(2008)
In Forest Ecology and Management
255(7).
p.2312-2323
- Abstract
- This study analyses the effects of thinning on stand transpiration in a typical mixed spruce and pine forest in the southern boreal zone. Studies of transpiration are important for models of water, energy and carbon exchange, and forest management, like thinning, would change those processes. Tree transpiration was measured by the tissue heat-balance sapflow technique, on a reference plot and a thinning plot situated in a 50-year-old stand in central Sweden. Sapflow was measured during one season (1998) on both plots before thinning, to establish reference values. In winter 1998/1999 24% of the basal area was removed from the thinning plot. Thinning was done so as to preserve the initial species composition and the size distribution. The... (More)
- This study analyses the effects of thinning on stand transpiration in a typical mixed spruce and pine forest in the southern boreal zone. Studies of transpiration are important for models of water, energy and carbon exchange, and forest management, like thinning, would change those processes. Tree transpiration was measured by the tissue heat-balance sapflow technique, on a reference plot and a thinning plot situated in a 50-year-old stand in central Sweden. Sapflow was measured during one season (1998) on both plots before thinning, to establish reference values. In winter 1998/1999 24% of the basal area was removed from the thinning plot. Thinning was done so as to preserve the initial species composition and the size distribution. The measurements continued after thinning during the growing seasons of 1999 and 2000. The climate showed remarkable differences between the 3 years; 1998 was wet and cool, with frequent rain, and the soil-water content was high throughout the year. In contrast, 1999 was dry and warm, and the soil-water content decreased to very low values, ca. 5-6% by volume. In 2000, the weather was more normal, with variable conditions. Stand transpiration was similar on both plots during the year before thinning; the plot to be thinned transpired 6% more than the reference plot. After thinning, transpiration was initially ca. 40% lower on the thinned plot, but the difference diminished successively. When the following drought was at its worst, the thinned plot transpired up to seven times more than the reference plot. During the second season after thinning, the thinned plot transpired ca. 20% more than the reference plot. The increased transpiration of the thinned plot could not be attributed to environmental variables, but was most probably caused by changes in biological factors, such as a fertilization effect. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1201750
- author
- Lagergren, Fredrik
LU
; Lankreijer, Harry
LU
; Kucera, Jiri
; Cienciala, Emil
; Mölder, Meelis
LU
and Lindroth, Anders
LU
- organization
- publishing date
- 2008
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- sap flow, thinning, Pinus sylvestris, Picea abies, forest management, drought
- in
- Forest Ecology and Management
- volume
- 255
- issue
- 7
- pages
- 2312 - 2323
- publisher
- Elsevier
- external identifiers
-
- wos:000256143900029
- scopus:41949129592
- ISSN
- 1872-7042
- DOI
- 10.1016/j.foreco.2007.12.047
- language
- English
- LU publication?
- yes
- id
- 4dd8ac91-3d44-4986-aae3-4b3b70f0e933 (old id 1201750)
- date added to LUP
- 2016-04-01 13:08:32
- date last changed
- 2024-06-06 10:45:10
@article{4dd8ac91-3d44-4986-aae3-4b3b70f0e933,
abstract = {{This study analyses the effects of thinning on stand transpiration in a typical mixed spruce and pine forest in the southern boreal zone. Studies of transpiration are important for models of water, energy and carbon exchange, and forest management, like thinning, would change those processes. Tree transpiration was measured by the tissue heat-balance sapflow technique, on a reference plot and a thinning plot situated in a 50-year-old stand in central Sweden. Sapflow was measured during one season (1998) on both plots before thinning, to establish reference values. In winter 1998/1999 24% of the basal area was removed from the thinning plot. Thinning was done so as to preserve the initial species composition and the size distribution. The measurements continued after thinning during the growing seasons of 1999 and 2000. The climate showed remarkable differences between the 3 years; 1998 was wet and cool, with frequent rain, and the soil-water content was high throughout the year. In contrast, 1999 was dry and warm, and the soil-water content decreased to very low values, ca. 5-6% by volume. In 2000, the weather was more normal, with variable conditions. Stand transpiration was similar on both plots during the year before thinning; the plot to be thinned transpired 6% more than the reference plot. After thinning, transpiration was initially ca. 40% lower on the thinned plot, but the difference diminished successively. When the following drought was at its worst, the thinned plot transpired up to seven times more than the reference plot. During the second season after thinning, the thinned plot transpired ca. 20% more than the reference plot. The increased transpiration of the thinned plot could not be attributed to environmental variables, but was most probably caused by changes in biological factors, such as a fertilization effect.}},
author = {{Lagergren, Fredrik and Lankreijer, Harry and Kucera, Jiri and Cienciala, Emil and Mölder, Meelis and Lindroth, Anders}},
issn = {{1872-7042}},
keywords = {{sap flow; thinning; Pinus sylvestris; Picea abies; forest management; drought}},
language = {{eng}},
number = {{7}},
pages = {{2312--2323}},
publisher = {{Elsevier}},
series = {{Forest Ecology and Management}},
title = {{Thinning effects on pine-spruce forest transpiration in central Sweden}},
url = {{http://dx.doi.org/10.1016/j.foreco.2007.12.047}},
doi = {{10.1016/j.foreco.2007.12.047}},
volume = {{255}},
year = {{2008}},
}