No diurnal variation in rate or carbon isotope composition of soil respiration in a boreal forest
(2007) In Tree Physiology 27(5). p.749-756- Abstract
- Characterization of soil respiration rates and δ13C values of soil-respired CO2 are often based on measurements at a particular time of day. A study by Gower et al. (2001) in a boreal forest demonstrated diurnal patterns of soil CO2 flux using transparent measurement chambers that included the understory
vegetation. It is unclear whether these diurnal patterns were solely the result of photosynthetic CO2 uptake during the day by the understory or whether there were underlying trends in soil respiration, perhaps driven by plant root allocation, as recently demonstrated in Mediterranean oak savannah. We undertook intensive sampling campaigns in a boreal Picea abies L. Karst. forest to investigate whether diurnal variations in soil... (More) - Characterization of soil respiration rates and δ13C values of soil-respired CO2 are often based on measurements at a particular time of day. A study by Gower et al. (2001) in a boreal forest demonstrated diurnal patterns of soil CO2 flux using transparent measurement chambers that included the understory
vegetation. It is unclear whether these diurnal patterns were solely the result of photosynthetic CO2 uptake during the day by the understory or whether there were underlying trends in soil respiration, perhaps driven by plant root allocation, as recently demonstrated in Mediterranean oak savannah. We undertook intensive sampling campaigns in a boreal Picea abies L. Karst. forest to investigate whether diurnal variations in soil respiration rate and stable carbon isotope ratio (δ13C) exist in this ecosystem when no understory vegetation is present in the measurement chamber. Soil respiration rates and δ13C were measured on plots in which trees were either girdled (to terminate the fraction of soil respiration directly dependent on recent photosynthate from the trees), or not girdled, every 4 h over two 48-hour cycles during the growth season of 2004.
Shoot photosynthesis and environmental parameters were measured concurrently. No diurnal patterns in soil respiration rates and δ13C were
observed in either treatment, despite substantial variations in climatic conditions and shoot photosynthetic rates in non-girdled trees. Consequently, assessment of daily soil respiration rates and δ13C in boreal forest systems by single, instantaneous daily measurements does not appear to be confounded by substantial diurnal variation. (Less)
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https://lup.lub.lu.se/record/4936305
- author
- Betson, Nicholas ; Göttlicher, Sabine ; Hall, Marianne LU ; Wallin, Göran ; Richter, Andreas and Högberg, Peter
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Picea abies L., (diurnal) soil respiration, spatial variation, tree girdling.
- in
- Tree Physiology
- volume
- 27
- issue
- 5
- pages
- 749 - 756
- publisher
- Oxford University Press
- external identifiers
-
- scopus:34250878378
- ISSN
- 1758-4469
- DOI
- 10.1093/treephys/27.5.749
- language
- English
- LU publication?
- no
- id
- 3da6aa7d-df8a-4ec3-a3c9-5e1c7e3403cc (old id 4936305)
- date added to LUP
- 2016-04-01 15:48:39
- date last changed
- 2022-04-12 12:22:01
@article{3da6aa7d-df8a-4ec3-a3c9-5e1c7e3403cc,
abstract = {{Characterization of soil respiration rates and δ13C values of soil-respired CO2 are often based on measurements at a particular time of day. A study by Gower et al. (2001) in a boreal forest demonstrated diurnal patterns of soil CO2 flux using transparent measurement chambers that included the understory<br/><br>
vegetation. It is unclear whether these diurnal patterns were solely the result of photosynthetic CO2 uptake during the day by the understory or whether there were underlying trends in soil respiration, perhaps driven by plant root allocation, as recently demonstrated in Mediterranean oak savannah. We undertook intensive sampling campaigns in a boreal Picea abies L. Karst. forest to investigate whether diurnal variations in soil respiration rate and stable carbon isotope ratio (δ13C) exist in this ecosystem when no understory vegetation is present in the measurement chamber. Soil respiration rates and δ13C were measured on plots in which trees were either girdled (to terminate the fraction of soil respiration directly dependent on recent photosynthate from the trees), or not girdled, every 4 h over two 48-hour cycles during the growth season of 2004.<br/><br>
Shoot photosynthesis and environmental parameters were measured concurrently. No diurnal patterns in soil respiration rates and δ13C were<br/><br>
observed in either treatment, despite substantial variations in climatic conditions and shoot photosynthetic rates in non-girdled trees. Consequently, assessment of daily soil respiration rates and δ13C in boreal forest systems by single, instantaneous daily measurements does not appear to be confounded by substantial diurnal variation.}},
author = {{Betson, Nicholas and Göttlicher, Sabine and Hall, Marianne and Wallin, Göran and Richter, Andreas and Högberg, Peter}},
issn = {{1758-4469}},
keywords = {{Picea abies L.; (diurnal) soil respiration; spatial variation; tree girdling.}},
language = {{eng}},
number = {{5}},
pages = {{749--756}},
publisher = {{Oxford University Press}},
series = {{Tree Physiology}},
title = {{No diurnal variation in rate or carbon isotope composition of soil respiration in a boreal forest}},
url = {{http://dx.doi.org/10.1093/treephys/27.5.749}},
doi = {{10.1093/treephys/27.5.749}},
volume = {{27}},
year = {{2007}},
}