Articles | Volume 20, issue 11
https://doi.org/10.5194/bg-20-2143-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-20-2143-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
15 Jun 2023
Research article |
| 15 Jun 2023
| 15 Jun 2023
Throughfall exclusion and fertilization effects on tropical dry forest tree plantations, a large-scale experiment
German Vargas Gutiérrez
CORRESPONDING AUTHOR
Department of Plant and Microbial Biology, University of Minnesota, St. Paul, MN 55108, USA
School of Biological Sciences, The University of Utah, Salt Lake City, UT 84112, USA
Daniel Pérez-Aviles
Department of Ecology, Evolution, & Behavior, University of Minnesota, St. Paul, MN 55108, USA
Nanette Raczka
Department of Biology, West Virginia University, Morgantown, WV 26506, USA
Damaris Pereira-Arias
Department of Ecology, Evolution, & Behavior, University of Minnesota, St. Paul, MN 55108, USA
Julián Tijerín-Triviño
Department de Ciencias de la Vida, Grupo de Ecología Forestal y Restauración, Universidad de Alcalá, Madrid, 28801, Spain
L. David Pereira-Arias
Department of Ecology, Evolution, & Behavior, University of Minnesota, St. Paul, MN 55108, USA
David Medvigy
Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
Bonnie G. Waring
Grantham Institute on Climate Change and the Environment, Imperial College London, London, SW7 2AZ, UK
Ember Morrisey
Division of Plant and Soil Sciences, West Virginia University, Morgantown, WV 26506, USA
Edward Brzostek
Department of Biology, West Virginia University, Morgantown, WV 26506, USA
Jennifer S. Powers
Department of Plant and Microbial Biology, University of Minnesota, St. Paul, MN 55108, USA
Department of Ecology, Evolution, & Behavior, University of Minnesota, St. Paul, MN 55108, USA
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We used an ecosystem model to simulate primary production of a tropical forest subjected to 3 years of nutrient fertilization. Simulations parameterized such that relative allocation to fine roots increased with increasing soil phosphorus had leaf, wood, and fine root production consistent with observations. However, these simulations seemed to over-allocate to fine roots on multidecadal timescales, affecting aboveground biomass. Additional observations across timescales would benefit models.
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Unprecedented climate extremes (UCEs) are expected to have dramatic impacts on ecosystems. We present a road map of how dynamic vegetation models can explore extreme drought and climate change and assess ecological processes to measure and reduce model uncertainties. The models predict strong nonlinear responses to UCEs. Due to different model representations, the models differ in magnitude and trajectory of forest loss. Therefore, we explore specific plant responses that reflect knowledge gaps.
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Short summary
To study whether nutrient availability controls tropical dry forest responses to reductions in soil moisture, we established the first troughfall exclusion experiment in a tropical dry forest plantation system crossed with a fertilization scheme. We found that the effects of fertilization on net primary productivity are larger than the effects of a ~15 % reduction in soil moisture, although in many cases we observed an interaction between drought and nutrient additions, suggesting colimitation.
To study whether nutrient availability controls tropical dry forest responses to reductions in...
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