Evidence of changing intrinsic water‐use efficiency under rising atmospheric CO 2 concentrations in Boreal Fennoscandia from subfossil leaves and tree ring δ 13 C ratios
Abstract Investigating the many internal feedbacks within the climate system is a vital component of the effort to quantify the full effects of future anthropogenic climate change. The stomatal apertures of plants tend to close and decrease in number under elevated CO 2 concentrations, increasing wa...
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crwiley:10.1111/j.1365-2486.2010.02273.x 2024-06-23T07:51:47+00:00 Evidence of changing intrinsic water‐use efficiency under rising atmospheric CO 2 concentrations in Boreal Fennoscandia from subfossil leaves and tree ring δ 13 C ratios GAGEN, MARY FINSINGER, WALTER WAGNER‐CREMER, FRIEDERIKE MCCARROLL, DANNY LOADER, NEIL J. ROBERTSON, IAIN JALKANEN, RISTO YOUNG, GILES KIRCHHEFER, ANDREAS 2011 http://dx.doi.org/10.1111/j.1365-2486.2010.02273.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2010.02273.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2010.02273.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 17, issue 2, page 1064-1072 ISSN 1354-1013 1365-2486 journal-article 2011 crwiley https://doi.org/10.1111/j.1365-2486.2010.02273.x 2024-06-13T04:21:20Z Abstract Investigating the many internal feedbacks within the climate system is a vital component of the effort to quantify the full effects of future anthropogenic climate change. The stomatal apertures of plants tend to close and decrease in number under elevated CO 2 concentrations, increasing water‐use efficiency (WUE) and reducing canopy evapotranspiration. Experimental and modelling studies reveal huge variations in these changes such that the warming associated with reduced evapotranspiration (known as physiological forcing) is neither well understood or constrained. Palaeo‐observations of changes in stomatal response and plant WUE under rising CO 2 might be used to better understand the processes underlying the physiological forcing feedback and to link measured changes in plant WUE to a specific physiological change in stomata. Here we use time series of tree ring ( Pinus sylvestris L.) δ 13 C and subfossil leaf ( Betula nana L.) measurements of stomatal density and geometry to derive records of changes in intrinsic water‐use efficiency (iWUE) and maximum stomatal conductance in the Boreal zone of northern Finland and Sweden. We investigate the rate of change in both proxies, over the recent past. The independent lines of evidence from these two different Boreal species indicate increased iWUE and reduced maximum stomatal conductance of similar magnitude from preindustrial times (ca. ad 1850) to around ad 1970. After this maximum stomatal conductance continues to decrease to ad 2000 in B. nana but iWUE in P. sylvestris reaches a plateau. We suggest that northern boreal P. sylvestris might have reached a threshold in its ability to increase WUE as CO 2 rises. Article in Journal/Newspaper Betula nana Fennoscandia Northern Finland Wiley Online Library Global Change Biology 17 2 1064 1072 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Investigating the many internal feedbacks within the climate system is a vital component of the effort to quantify the full effects of future anthropogenic climate change. The stomatal apertures of plants tend to close and decrease in number under elevated CO 2 concentrations, increasing water‐use efficiency (WUE) and reducing canopy evapotranspiration. Experimental and modelling studies reveal huge variations in these changes such that the warming associated with reduced evapotranspiration (known as physiological forcing) is neither well understood or constrained. Palaeo‐observations of changes in stomatal response and plant WUE under rising CO 2 might be used to better understand the processes underlying the physiological forcing feedback and to link measured changes in plant WUE to a specific physiological change in stomata. Here we use time series of tree ring ( Pinus sylvestris L.) δ 13 C and subfossil leaf ( Betula nana L.) measurements of stomatal density and geometry to derive records of changes in intrinsic water‐use efficiency (iWUE) and maximum stomatal conductance in the Boreal zone of northern Finland and Sweden. We investigate the rate of change in both proxies, over the recent past. The independent lines of evidence from these two different Boreal species indicate increased iWUE and reduced maximum stomatal conductance of similar magnitude from preindustrial times (ca. ad 1850) to around ad 1970. After this maximum stomatal conductance continues to decrease to ad 2000 in B. nana but iWUE in P. sylvestris reaches a plateau. We suggest that northern boreal P. sylvestris might have reached a threshold in its ability to increase WUE as CO 2 rises. |
format |
Article in Journal/Newspaper |
author |
GAGEN, MARY FINSINGER, WALTER WAGNER‐CREMER, FRIEDERIKE MCCARROLL, DANNY LOADER, NEIL J. ROBERTSON, IAIN JALKANEN, RISTO YOUNG, GILES KIRCHHEFER, ANDREAS |
spellingShingle |
GAGEN, MARY FINSINGER, WALTER WAGNER‐CREMER, FRIEDERIKE MCCARROLL, DANNY LOADER, NEIL J. ROBERTSON, IAIN JALKANEN, RISTO YOUNG, GILES KIRCHHEFER, ANDREAS Evidence of changing intrinsic water‐use efficiency under rising atmospheric CO 2 concentrations in Boreal Fennoscandia from subfossil leaves and tree ring δ 13 C ratios |
author_facet |
GAGEN, MARY FINSINGER, WALTER WAGNER‐CREMER, FRIEDERIKE MCCARROLL, DANNY LOADER, NEIL J. ROBERTSON, IAIN JALKANEN, RISTO YOUNG, GILES KIRCHHEFER, ANDREAS |
author_sort |
GAGEN, MARY |
title |
Evidence of changing intrinsic water‐use efficiency under rising atmospheric CO 2 concentrations in Boreal Fennoscandia from subfossil leaves and tree ring δ 13 C ratios |
title_short |
Evidence of changing intrinsic water‐use efficiency under rising atmospheric CO 2 concentrations in Boreal Fennoscandia from subfossil leaves and tree ring δ 13 C ratios |
title_full |
Evidence of changing intrinsic water‐use efficiency under rising atmospheric CO 2 concentrations in Boreal Fennoscandia from subfossil leaves and tree ring δ 13 C ratios |
title_fullStr |
Evidence of changing intrinsic water‐use efficiency under rising atmospheric CO 2 concentrations in Boreal Fennoscandia from subfossil leaves and tree ring δ 13 C ratios |
title_full_unstemmed |
Evidence of changing intrinsic water‐use efficiency under rising atmospheric CO 2 concentrations in Boreal Fennoscandia from subfossil leaves and tree ring δ 13 C ratios |
title_sort |
evidence of changing intrinsic water‐use efficiency under rising atmospheric co 2 concentrations in boreal fennoscandia from subfossil leaves and tree ring δ 13 c ratios |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.1111/j.1365-2486.2010.02273.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2010.02273.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2010.02273.x |
genre |
Betula nana Fennoscandia Northern Finland |
genre_facet |
Betula nana Fennoscandia Northern Finland |
op_source |
Global Change Biology volume 17, issue 2, page 1064-1072 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2486.2010.02273.x |
container_title |
Global Change Biology |
container_volume |
17 |
container_issue |
2 |
container_start_page |
1064 |
op_container_end_page |
1072 |
_version_ |
1802642924921421824 |