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Functional trait variation related to gap dynamics in tropical moist forests: a vegetation modelling perspective
File | Description | Size | Format | |
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Togashi et al dynamic roles MS 131018[492].docx | Accepted version | 1.34 MB | Microsoft Word | View/Open |
Title: | Functional trait variation related to gap dynamics in tropical moist forests: a vegetation modelling perspective |
Authors: | Prentice, I Togashi, HF Atkin, OK Bloomfield, K Bradford, M Cao, K Dong, N Evans, B Fan, Z Harrison, SP Hua, Z Liddell, MJ Lloyd, J Ni, J Wang, H Weerasinghe, LK |
Item Type: | Journal Article |
Abstract: | The conventional representation of Plant Functional Types (PFTs) in Dynamic Global Vegetation Models (DGVMs) is increasingly recognized as simplistic and lacking in predictive power. Key ecophysiological traits, including photosynthetic parameters, are typically assigned single values for each PFT while the substantial trait variation within PFTs is neglected. This includes continuous variation in response to environmental factors, and differences linked to spatial and temporal niche differentiation within communities. A much stronger empirical basis is required for the treatment of continuous plant functional trait variation in DGVMs. We analyse 431 sets of measurements of leaf and plant traits, including photosynthetic measurements, on evergreen angiosperm trees in tropical moist forests of Australia and China. Confining attention to tropical moist forests, our analysis identifies trait differences that are linked to vegetation dynamic roles. Coordination theory predicts that Rubisco- and electron-transport limited rates of photosynthesis are co-limiting under field conditions. The least-cost hypothesis predicts that air-to-leaf CO2 drawdown minimizes the combined costs per unit carbon assimilation of maintaining carboxylation and transpiration capacities. Aspects of these predictions are supported for within-community trait variation linked to canopy position, just as they are for variation along spatial environmental gradients. Trait differences among plant species occupying different structural and temporal niches may provide a basis for the ecophysiological representation of vegetation dynamics in next-generation DGVMs. |
Issue Date: | 1-Dec-2018 |
Date of Acceptance: | 31-Oct-2018 |
URI: | http://hdl.handle.net/10044/1/66099 |
DOI: | https://dx.doi.org/10.1016/j.ppees.2018.10.004 |
ISSN: | 1433-8319 |
Publisher: | Elsevier |
Start Page: | 52 |
End Page: | 64 |
Journal / Book Title: | Perspectives in Plant Ecology, Evolution and Systematics |
Volume: | 35 |
Copyright Statement: | © 2018 Published by Elsevier GmbH. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/ |
Keywords: | Science & Technology Life Sciences & Biomedicine Plant Sciences Ecology Environmental Sciences & Ecology Plant traits Photosynthesis Vegetation dynamics Tropical forests DGVMs TEMPERATURE RESPONSE FUNCTIONS BASIN-WIDE VARIATIONS RAIN-FOREST LEAF RESPIRATION ADAPTIVE VARIATION WATER TRANSPORT USE EFFICIENCY CARBON GAIN CLIMATE NITROGEN 0602 Ecology 0607 Plant Biology 0603 Evolutionary Biology |
Publication Status: | Published |
Online Publication Date: | 2018-11-03 |
Appears in Collections: | Department of Life Sciences Faculty of Natural Sciences |