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Net primary production and light use efficiency in a mixed coniferous forest in Sweden

Lagergren, Fredrik LU ; Eklundh, Lars LU ; Grelle, A; Lundblad, M; Mölder, Meelis LU ; Lankreijer, Harry LU and Lindroth, Anders LU (2005) In Plant, Cell and Environment 28(3). p.412-423
Abstract
Simple light use efficiency (epsilon) models of net primary production (NPP) have recently been given great attention (NPP = epsilon x absorbed photosynthetically active radiation). The underlying relationships have, however, not been much studied on a time step less than a month. In this study daily NPP was estimated as the sum of net ecosystem exchange (NEE) and heterotrophic respiration (R-h) of a mixed pine and spruce forest in Sweden. NEE was measured by eddy correlation technique and R-h was estimated from measurements of forest floor respiration (R-f) and the root share of R-f. The total yearly NPP was on average 810 g C m(-2) year(-1) for 3 years and yearly epsilon was between 0.58 and 0.71 g C MJ(-1), which is high in comparison... (More)
Simple light use efficiency (epsilon) models of net primary production (NPP) have recently been given great attention (NPP = epsilon x absorbed photosynthetically active radiation). The underlying relationships have, however, not been much studied on a time step less than a month. In this study daily NPP was estimated as the sum of net ecosystem exchange (NEE) and heterotrophic respiration (R-h) of a mixed pine and spruce forest in Sweden. NEE was measured by eddy correlation technique and R-h was estimated from measurements of forest floor respiration (R-f) and the root share of R-f. The total yearly NPP was on average 810 g C m(-2) year(-1) for 3 years and yearly epsilon was between 0.58 and 0.71 g C MJ(-1), which is high in comparison with other studies. There was a seasonal trend in epsilon with a relatively constant level of approximately 0.90 g C MJ(-1) from April to September Daily NPP did not increase for daily intercepted radiation above 6 MJ m(-2) d(-1), indicating that between-years variation in NPP is not directly dependent on total Q(i). The light was most efficiently used at an average daytime temperature of around 15 degreesC. At daytime vapour pressure deficit above 1400 Pa epsilon was reduced by approximately 50%. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Norway spruce, light saturation, meteorological dependency, Scots pine, seasonal variation
in
Plant, Cell and Environment
volume
28
issue
3
pages
412 - 423
publisher
Wiley-Blackwell
external identifiers
  • wos:000227087600013
  • scopus:14644415583
ISSN
0140-7791
DOI
10.1111/j.1365-3040.2004.01280.x
language
English
LU publication?
yes
id
950e2fd0-6373-4596-bf3a-45482b496b49 (old id 252241)
date added to LUP
2007-08-20 13:14:04
date last changed
2017-10-08 03:26:26
@article{950e2fd0-6373-4596-bf3a-45482b496b49,
  abstract     = {Simple light use efficiency (epsilon) models of net primary production (NPP) have recently been given great attention (NPP = epsilon x absorbed photosynthetically active radiation). The underlying relationships have, however, not been much studied on a time step less than a month. In this study daily NPP was estimated as the sum of net ecosystem exchange (NEE) and heterotrophic respiration (R-h) of a mixed pine and spruce forest in Sweden. NEE was measured by eddy correlation technique and R-h was estimated from measurements of forest floor respiration (R-f) and the root share of R-f. The total yearly NPP was on average 810 g C m(-2) year(-1) for 3 years and yearly epsilon was between 0.58 and 0.71 g C MJ(-1), which is high in comparison with other studies. There was a seasonal trend in epsilon with a relatively constant level of approximately 0.90 g C MJ(-1) from April to September Daily NPP did not increase for daily intercepted radiation above 6 MJ m(-2) d(-1), indicating that between-years variation in NPP is not directly dependent on total Q(i). The light was most efficiently used at an average daytime temperature of around 15 degreesC. At daytime vapour pressure deficit above 1400 Pa epsilon was reduced by approximately 50%.},
  author       = {Lagergren, Fredrik and Eklundh, Lars and Grelle, A and Lundblad, M and Mölder, Meelis and Lankreijer, Harry and Lindroth, Anders},
  issn         = {0140-7791},
  keyword      = {Norway spruce,light saturation,meteorological dependency,Scots pine,seasonal variation},
  language     = {eng},
  number       = {3},
  pages        = {412--423},
  publisher    = {Wiley-Blackwell},
  series       = {Plant, Cell and Environment},
  title        = {Net primary production and light use efficiency in a mixed coniferous forest in Sweden},
  url          = {http://dx.doi.org/10.1111/j.1365-3040.2004.01280.x},
  volume       = {28},
  year         = {2005},
}