Whole-plant optimality predicts changes in leaf nitrogen under variable CO
ecosystem modelling
elevated CO2
nitrogen (N) limitation
optimality theory
plant physiology
plant plasticity
vegetation modelling
Journal
The New phytologist
ISSN: 1469-8137
Titre abrégé: New Phytol
Pays: England
ID NLM: 9882884
Informations de publication
Date de publication:
03 2020
03 2020
Historique:
received:
27
06
2019
accepted:
05
11
2019
pubmed:
19
11
2019
medline:
15
5
2021
entrez:
19
11
2019
Statut:
ppublish
Résumé
Vegetation nutrient limitation is essential for understanding ecosystem responses to global change. In particular, leaf nitrogen (N) is known to be plastic under changed nutrient limitation. However, models can often not capture these observed changes, leading to erroneous predictions of whole-ecosystem stocks and fluxes. We hypothesise that an optimality approach can improve representation of leaf N content compared to existing empirical approaches. Unlike previous optimality-based approaches, which adjust foliar N concentrations based on canopy carbon export, we use a maximisation criterion based on whole-plant growth, and allow for a lagged response of foliar N to this maximisation criterion to account for the limited plasticity of this plant trait. We test these model variants at a range of Free-Air CO
Substances chimiques
Carbon Dioxide
142M471B3J
Carbon
7440-44-0
Nitrogen
N762921K75
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
2331-2346Informations de copyright
© 2019 The Authors. New Phytologist ©2019 New Phytologist Trust.
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