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Diversity in plant hydraulic traits explains seasonal and inter-annual variations of vegetation dynamics in seasonally dry tropical forests
2016
New Phytologist
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We assessed whether diversity in plant hydraulic traits can explain the observed diversity in plant responses to water stress in seasonally dry tropical forests (SDTFs). ...
The updated model generated realistic plant hydraulic dynamics, such as leaf water potential and stem sap flow. ...
Acknowledgements The authors gratefully acknowledge support from a National Science Foundation CAREER Award DEB-1053237 (to J.S.P.), the US Department of Energy, Office of Science, Office of Biological ...
doi:10.1111/nph.14009
pmid:27189787
fatcat:h2ffouz4ejeedmr2quuntdaxea
Improved SWAT vegetation growth module for tropical ecosystem
2017
Hydrology and Earth System Sciences Discussions
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Our goal is to improve the vegetation growth module of the SWAT model for simulating the vegetation parameters such as the leaf area index (LAI) for tropics. ...
(PET) – to initiate a new growing season after a defined dry season. ...
The total number of heat units required for a 129 plant to reach maturity must be provided by the user that is calculated: The plant growth modeling in SWAT includes simulation of the leaf area development ...
doi:10.5194/hess-2017-104
fatcat:4u6zh2nchjak5iswtupvmqrh2i
Complete or over‐compensatory thermal acclimation of leaf dark respiration in African tropical trees
2020
New Phytologist
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●Tropical climates are getting warmer, with pronounced dry periods in large areas. ...
The productivity and climate feedbacks of future tropical forests depend on the ability of trees to acclimate their physiological processes, such as leaf dark respiration (Rd ), to these new conditions ...
Leaf respiration responses to rising temperature and seasonal drought The effect of temperature on leaf dark respiration In tropical forests, leaf Rd constitute a high proportion of the total plant respiration ...
doi:10.1111/nph.17038
pmid:33113226
fatcat:bnffzuhff5e6ji4lmjthe7hzea
An improved SWAT vegetation growth module and its evaluation for four tropical ecosystems
2017
Hydrology and Earth System Sciences
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Our goal is to improve the vegetation growth module of SWAT for simulating the vegetation variables – such as the leaf area index (LAI) – for tropical ecosystems. ...
However, SWAT has limitations in simulating the seasonal growth cycles for trees and perennial vegetation in the tropics, where rainfall rather than temperature is the dominant plant growth controlling ...
We also would like to thank the Water Resource Management Authority (WRMA) of Kenya for the provision of streamflow data. ...
doi:10.5194/hess-21-4449-2017
fatcat:ugnamq3d2vabffopkqvo7cs32m
Seasonal leaf dynamics for tropical evergreen forests in a process-based global ecosystem model
2012
Geoscientific Model Development
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We conclude that we introduced a realistic and generic litterfall dynamics scheme, but that other processes need to be improved in the model to achieve better simulations of GPP seasonal patterns for tropical ...
</strong> The influence of seasonal phenology on canopy photosynthesis in tropical evergreen forests remains poorly understood, and its representation in global ecosystem models is highly simplified, typically ...
Wofsy for making the eddy flux and leaf litterfall data of the Tapajós km 67 site available at the Oak Ridge National Laboratory Distributed Active Archive Center. ...
doi:10.5194/gmd-5-1091-2012
fatcat:25riis7hkvb27cczvjlhl2ov7i
Seasonal leaf dynamics for tropical evergreen forests in a process based global ecosystem model
2012
Geoscientific Model Development Discussions
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We conclude that we introduced a realistic and generic litterfall dynamics scheme, but that other processes need to be improved in the model to achieve better simulations of GPP seasonal patterns for tropical ...
The influence of seasonal phenology on canopy photosynthesis in tropical evergreen forests remains poorly understood, and its representation in global ecosystem models is highly simplified, typically with ...
Wofsy for making the eddy flux and leaf litterfall data of the Tapajós km 67 site available at the Oak Ridge National Laboratory Distributed Active Archive Center. ...
doi:10.5194/gmdd-5-639-2012
fatcat:pxmm3e5z5jfhvmsg2jqissurwq
Amazon forest structure generates diurnal and seasonal variability in light utilization
2016
Biogeosciences
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</strong> The complex three-dimensional (3-D) structure of tropical forests generates a diversity of light environments for canopy and understory trees. ...
Our findings highlight how directional illumination and forest 3-D structure combine to influence diurnal and seasonal variability in light utilization, independent of further changes in leaf area, leaf ...
In tropical forests, branches may account for one-third of the total aboveground biomass (Higuchi et al., 1998 ), yet few ecosystem models realistically account for the roles of branches and stem material ...
doi:10.5194/bg-13-2195-2016
fatcat:gl3x74scpjay3itosjbxf4bxhi
Amazon forest structure generates diurnal and seasonal variability in light utilization
2015
Biogeosciences Discussions
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The complex three-dimensional (3-D) structure of tropical forests generates a diversity of light environments for canopy and understory trees. ...
Our findings highlight how directional illumination and forest 3-D structure combine to influence diurnal and seasonal variability in light utilization, independent of further changes in leaf area, leaf ...
In tropical forests, branches may account for one-third of the total aboveground biomass (Higuchi et al., 1998 ), yet few ecosystem models realistically account for the roles of branches and stem material ...
doi:10.5194/bgd-12-19043-2015
fatcat:i3kon2mdlvbmnkv6bgac2yvb7i
Biophysical homoeostasis of leaf temperature: A neglected process for vegetation and land-surface modelling
2017
Global Ecology and Biogeography
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a tropical seasonal forest. ...
We encourage consideration of leaf-and canopy-to-air temperature 28 differences (ΔΤ) as a benchmark for land-surface modelling, and an important feature 29 of plant and ecosystem function. 30 Location ...
Diurnal time courses of the canopy-to-air temperature difference (ΔΤ, K) and 558 canopy temperature during the dry season (January 2013) in a continuous tropical 559 seasonal forest (Xishuangbanna Tropical ...
doi:10.1111/geb.12614
fatcat:6t3kogriuba3va5mxf2puu5ety
Modeling biogenic emissions of isoprene: exploration of model drivers, climate control algorithms, and use of global satellite observations
2001
Atmospheric Environment
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The NASA-CASA model results indicate that the annual isoprene flux from terrestrial plant sources is 559 Tg C: Three ecosystem types, broadleaf evergreen forest, dry tropical forest, and wooded grassland ...
An improved global budget for isoprene emissions from terrestrial vegetation sources is fundamental to a better understanding of the oxidative capacity of the lower atmosphere and changes in the concentration ...
We thank Alex Guenther for assistance in model algorithm development. ...
doi:10.1016/s1352-2310(01)00390-9
fatcat:wbxzdibvdvg57btgvmcunsb46y
Trait Acclimation Mitigates Mortality Risks of Tropical Canopy Trees under Global Warming
2016
Frontiers in Plant Science
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We call for incorporating trait acclimation in field and experimental studies of plant functional traits, and in models that predict responses of tropical forests to climate change. ...
Our model estimated the maximum effect of acclimation when trees optimize traits that are strongly plastic on a week to annual time scale (leaf photosynthetic capacity, total leaf area, stem sapwood area ...
AUTHOR CONTRIBUTIONS All authors contributed to designing this study, drafting and revising the work. FS and FSc developed the plant model used and FS carried out the analysis for this study. ...
doi:10.3389/fpls.2016.00607
pmid:27242814
pmcid:PMC4863428
fatcat:qd5wf5ml7zfr5lgq7tzpb72ype
The biophysics, ecology, and biogeochemistry of functionally diverse, vertically- and horizontally-heterogeneous ecosystems: the Ecosystem Demography Model, version 2.2 – Part 2: Model evaluation
2019
Geoscientific Model Development Discussions
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on energy, water, and carbon cycles, as well as the priority areas for further model development. ...
We also identified some of the model limitations, such as the model's tendency to overestimate the magnitude and seasonality of heterotrophic respiration, and to overestimate growth rates in a nutrient-poor ...
The research was partially carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. ...
doi:10.5194/gmd-2019-71
fatcat:udlfsuzddzhd7bh2mx5u5l7gt4
The biophysics, ecology, and biogeochemistry of functionally diverse, vertically and horizontally heterogeneous ecosystems: the Ecosystem Demography model, version 2.2 – Part 2: Model evaluation for tropical South America
2019
Geoscientific Model Development
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We also identified several limitations, including the model's tendency to overestimate the magnitude and seasonality of heterotrophic respiration and to overestimate growth rates in a nutrient-poor tropical ...
We also identify several priorities for further model development. ...
Additional measurements of leaf and wood heat capacity for tropical forests could improve the accuracy of leaf and branch temperatures in the model. ...
doi:10.5194/gmd-12-4347-2019
fatcat:lnqpqryxhvfgpbbxc2ddwmp3z4
Contrasting leaf phenological strategies optimize carbon gain under droughts of different duration
2015
Advances in Water Resources
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Here we consider these theories in a unified framework using the same set of equations to describe gas exchanges and water transport in the soil-plant-atmosphere continuum, and quantify the effect of the ...
to avoid water potentials with negative impacts on A net; (iii) a constant leaf water potential is maintained (isohydric behavior); and (iv) leaf area remains unaltered (i.e., summer-evergreen leaf habit ...
We acknowledge partial support from the Faculty of Natural Resources and Agricultural Sciences and the vice-chancellor of the Swedish University of Agricultural Sciences, and from the US National Science ...
doi:10.1016/j.advwatres.2015.08.001
fatcat:kbswvdj2y5dbvbwdle7yyrnzwm
Evidence for strong seasonality in the carbon storage and carbon use efficiency of an Amazonian forest
2014
Global Change Biology
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changes in the net carbon flux of tropical forests remains poorly quantified by both modelling and field studies. ...
The resulting analysis quantifies, with uncertainty estimates, the seasonal changes in the net carbon flux of a tropical rainforest which experiences a pronounced dry season. ...
Reay for their help and support, as well as two anonymous reviewers for their contributions. This study was part of the GUYAFLUX project funded by the French Ministry ...
doi:10.1111/gcb.12375
pmid:23996917
pmcid:PMC4298765
fatcat:nuupboiobjaejixzcc5w54jo4u
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