Estimating canopy gross primary production by combining phloem stable isotopes with canopy and mesophyll conductances
Abstract Gross primary production (GPP) is a key component of the forest carbon cycle. However, our knowledge of GPP at the stand scale remains uncertain, because estimates derived from eddy covariance (EC) rely on semi‐empirical modelling and the assumptions of the EC technique are sometimes not fu...
Published in: | Plant, Cell & Environment |
---|---|
Main Authors: | , , , , , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2020
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/pce.13835 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fpce.13835 https://onlinelibrary.wiley.com/doi/pdf/10.1111/pce.13835 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/pce.13835 |
id |
crwiley:10.1111/pce.13835 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/pce.13835 2024-09-30T14:40:18+00:00 Estimating canopy gross primary production by combining phloem stable isotopes with canopy and mesophyll conductances Vernay, Antoine Tian, Xianglin Chi, Jinshu Linder, Sune Mäkelä, Annikki Oren, Ram Peichl, Matthias Stangl, Zsofia R. Tor‐Ngern, Pantana Marshall, John D. Kempestiftelserna Knut och Alice Wallenbergs Stiftelse 2020 http://dx.doi.org/10.1111/pce.13835 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fpce.13835 https://onlinelibrary.wiley.com/doi/pdf/10.1111/pce.13835 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/pce.13835 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Plant, Cell & Environment volume 43, issue 9, page 2124-2142 ISSN 0140-7791 1365-3040 journal-article 2020 crwiley https://doi.org/10.1111/pce.13835 2024-09-19T04:18:53Z Abstract Gross primary production (GPP) is a key component of the forest carbon cycle. However, our knowledge of GPP at the stand scale remains uncertain, because estimates derived from eddy covariance (EC) rely on semi‐empirical modelling and the assumptions of the EC technique are sometimes not fully met. We propose using the sap flux/isotope method as an alternative way to estimate canopy GPP, termed GPP iso/SF , at the stand scale and at daily resolution. It is based on canopy conductance inferred from sap flux and intrinsic water‐use efficiency estimated from the stable carbon isotope composition of phloem contents. The GPP iso/SF estimate was further corrected for seasonal variations in photosynthetic capacity and mesophyll conductance. We compared our estimate of GPP iso/SF to the GPP derived from PRELES, a model parameterized with EC data. The comparisons were performed in a highly instrumented, boreal Scots pine forest in northern Sweden, including a nitrogen fertilized and a reference plot. The resulting annual and daily GPP iso/SF estimates agreed well with PRELES, in the fertilized plot and the reference plot. We discuss the GPP iso/SF method as an alternative which can be widely applied without terrain restrictions, where the assumptions of EC are not met. Article in Journal/Newspaper Northern Sweden Wiley Online Library Plant, Cell & Environment 43 9 2124 2142 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Gross primary production (GPP) is a key component of the forest carbon cycle. However, our knowledge of GPP at the stand scale remains uncertain, because estimates derived from eddy covariance (EC) rely on semi‐empirical modelling and the assumptions of the EC technique are sometimes not fully met. We propose using the sap flux/isotope method as an alternative way to estimate canopy GPP, termed GPP iso/SF , at the stand scale and at daily resolution. It is based on canopy conductance inferred from sap flux and intrinsic water‐use efficiency estimated from the stable carbon isotope composition of phloem contents. The GPP iso/SF estimate was further corrected for seasonal variations in photosynthetic capacity and mesophyll conductance. We compared our estimate of GPP iso/SF to the GPP derived from PRELES, a model parameterized with EC data. The comparisons were performed in a highly instrumented, boreal Scots pine forest in northern Sweden, including a nitrogen fertilized and a reference plot. The resulting annual and daily GPP iso/SF estimates agreed well with PRELES, in the fertilized plot and the reference plot. We discuss the GPP iso/SF method as an alternative which can be widely applied without terrain restrictions, where the assumptions of EC are not met. |
author2 |
Kempestiftelserna Knut och Alice Wallenbergs Stiftelse |
format |
Article in Journal/Newspaper |
author |
Vernay, Antoine Tian, Xianglin Chi, Jinshu Linder, Sune Mäkelä, Annikki Oren, Ram Peichl, Matthias Stangl, Zsofia R. Tor‐Ngern, Pantana Marshall, John D. |
spellingShingle |
Vernay, Antoine Tian, Xianglin Chi, Jinshu Linder, Sune Mäkelä, Annikki Oren, Ram Peichl, Matthias Stangl, Zsofia R. Tor‐Ngern, Pantana Marshall, John D. Estimating canopy gross primary production by combining phloem stable isotopes with canopy and mesophyll conductances |
author_facet |
Vernay, Antoine Tian, Xianglin Chi, Jinshu Linder, Sune Mäkelä, Annikki Oren, Ram Peichl, Matthias Stangl, Zsofia R. Tor‐Ngern, Pantana Marshall, John D. |
author_sort |
Vernay, Antoine |
title |
Estimating canopy gross primary production by combining phloem stable isotopes with canopy and mesophyll conductances |
title_short |
Estimating canopy gross primary production by combining phloem stable isotopes with canopy and mesophyll conductances |
title_full |
Estimating canopy gross primary production by combining phloem stable isotopes with canopy and mesophyll conductances |
title_fullStr |
Estimating canopy gross primary production by combining phloem stable isotopes with canopy and mesophyll conductances |
title_full_unstemmed |
Estimating canopy gross primary production by combining phloem stable isotopes with canopy and mesophyll conductances |
title_sort |
estimating canopy gross primary production by combining phloem stable isotopes with canopy and mesophyll conductances |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/pce.13835 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fpce.13835 https://onlinelibrary.wiley.com/doi/pdf/10.1111/pce.13835 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/pce.13835 |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
Plant, Cell & Environment volume 43, issue 9, page 2124-2142 ISSN 0140-7791 1365-3040 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/pce.13835 |
container_title |
Plant, Cell & Environment |
container_volume |
43 |
container_issue |
9 |
container_start_page |
2124 |
op_container_end_page |
2142 |
_version_ |
1811642799043379200 |