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A Telemetric, Gravimetric Platform for Real-Time Physiological Phenotyping of Plant–Environment Interactions
Published on: August 5, 2020
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Prolonged warming and drought modify belowground interactions for water among coexisting plants
Charlotte Grossiord1, Sanna Sevanto1, Damien Bonal2
1Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, USA.
Tree Physiology
|September 15, 2018
Summary
Climate change impacts plant water competition. Warming increased competition between trees and grasses, while drought maintained water partitioning. Extreme climate events can override these adaptations.
Area of Science:
- Ecology
- Plant Physiology
- Climate Change Science
Background:
- Understanding plant-soil water dynamics is crucial for predicting vegetation responses to climate change.
- Belowground interactions for water resources are key to plant community function under environmental stress.
Purpose of the Study:
- To analyze shifts in plant water uptake and water source partitioning under warming and drought.
- To assess the impact of altered water dynamics on plant physiological functions.
Main Methods:
- A 6-year field experiment in a semi-arid woodland exposing piñon, juniper, and blue grama to warming and reduced precipitation.
- Measurement of soil and plant water isotopic composition to determine water uptake depths and sources.
Main Results:
- Warming altered water uptake depths, leading to reduced water source partitioning and increased competition between trees and grasses.
- Drought caused shifts to deeper soil water sources, maintaining existing water partitioning among species.
- Trees experienced increased water stress, reduced water use, and decreased photosynthesis under both warming and drought.
Conclusions:
- Neighboring plants alter competitive water interactions under prolonged warming and drought.
- These competitive adaptations can be overwhelmed by climate extremes, impacting vegetation resilience.
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