Changes in biomass allocation buffer low CO2 effects on tree growth during the last glaciation
dc.contributor.author | Li, Guangqi | |
dc.contributor.author | Gerhart, Laci M. | |
dc.contributor.author | Harrison, Sandy P. | |
dc.contributor.author | Ward, Joy K. | |
dc.contributor.author | Harris, John M. | |
dc.contributor.author | Prentice, I. Colin | |
dc.date.accessioned | 2018-11-16T20:33:16Z | |
dc.date.available | 2018-11-16T20:33:16Z | |
dc.date.issued | 2017-02-24 | |
dc.identifier.citation | Li, G. et al. Changes in biomass allocation buffer low CO2 effects on tree growth during the last glaciation. Sci. Rep. 7, 43087; doi: 10.1038/srep43087 (2017). | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/27392 | |
dc.description.abstract | Isotopic measurements on junipers growing in southern California during the last glacial, when the ambient atmospheric [CO2] (ca) was ~180 ppm, show the leaf-internal [CO2] (ci) was approaching the modern CO2 compensation point for C3 plants. Despite this, stem growth rates were similar to today. Using a coupled light-use efficiency and tree growth model, we show that it is possible to maintain a stable ci/ca ratio because both vapour pressure deficit and temperature were decreased under glacial conditions at La Brea, and these have compensating effects on the ci/ca ratio. Reduced photorespiration at lower temperatures would partly mitigate the effect of low ci on gross primary production, but maintenance of present-day radial growth also requires a ~27% reduction in the ratio of fine root mass to leaf area. Such a shift was possible due to reduced drought stress under glacial conditions at La Brea. The necessity for changes in allocation in response to changes in [CO2] is consistent with increased below-ground allocation, and the apparent homoeostasis of radial growth, as ca increases today. | en_US |
dc.description.sponsorship | 694481 | en_US |
dc.publisher | Nature Research | en_US |
dc.rights | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. | en_US |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_US |
dc.subject | Ecological modelling | en_US |
dc.subject | Forest ecology | en_US |
dc.subject | Palaeoecology | en_US |
dc.subject | Plant ecology | en_US |
dc.title | Changes in biomass allocation buffer low CO2 effects on tree growth during the last glaciation | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Ward, Joy K. | |
kusw.kudepartment | Ecology and Evolutionary Biology | en_US |
dc.identifier.doi | 10.1038/srep43087 | en_US |
kusw.oaversion | Scholarly/refereed, publisher version | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.rights.accessrights | openAccess | en_US |
Files in this item
This item appears in the following Collection(s)
Except where otherwise noted, this item's license is described as: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material.