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Water-Use Characteristics and Physiological Response of Moso Bamboo to Flash Droughts
Frequent flash droughts can rapidly lead to water shortage, which affects the stability of ecosystems. This study determines the water-use characteristics and physiological mechanisms underlying Moso bamboo response to flash-drought events, and estimates changes to water budgets caused by extreme dr...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6616449/ https://www.ncbi.nlm.nih.gov/pubmed/31248206 http://dx.doi.org/10.3390/ijerph16122174 |
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author | Zhang, Minxia Chen, Shulin Jiang, Hong Lin, Yong Zhang, Jinmeng Song, Xinzhang Zhou, Guomo |
author_facet | Zhang, Minxia Chen, Shulin Jiang, Hong Lin, Yong Zhang, Jinmeng Song, Xinzhang Zhou, Guomo |
author_sort | Zhang, Minxia |
collection | PubMed |
description | Frequent flash droughts can rapidly lead to water shortage, which affects the stability of ecosystems. This study determines the water-use characteristics and physiological mechanisms underlying Moso bamboo response to flash-drought events, and estimates changes to water budgets caused by extreme drought. We analyzed the variability in forest canopy transpiration versus precipitation from 2011–2013. Evapotranspiration reached 730 mm during flash drought years. When the vapor pressure deficit > 2 kPa and evapotranspiration > 4.27 mm·day(−1), evapotranspiration was mainly controlled through stomatal opening and closing to reduce water loss. However, water exchange mainly occurred in the upper 0–50 cm of the soil. When soil volumetric water content of 50 cm was lower than 0.17 m(3)·m(−3), physiological dehydration occurred in Moso bamboo to reduce transpiration by defoliation, which leads to water-use efficiency decrease. When mean stand density was <3500 trees·ha(−1), the bamboo forest can safely survive the flash drought. Therefore, we recommend thinning Moso bamboo as a management strategy to reduce transpiration in response to future extreme drought events. Additionally, the response function of soil volumetric water content should be used to better simulate evapotranspiration, especially when soil water is limited. |
format | Online Article Text |
id | pubmed-6616449 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-66164492019-07-18 Water-Use Characteristics and Physiological Response of Moso Bamboo to Flash Droughts Zhang, Minxia Chen, Shulin Jiang, Hong Lin, Yong Zhang, Jinmeng Song, Xinzhang Zhou, Guomo Int J Environ Res Public Health Article Frequent flash droughts can rapidly lead to water shortage, which affects the stability of ecosystems. This study determines the water-use characteristics and physiological mechanisms underlying Moso bamboo response to flash-drought events, and estimates changes to water budgets caused by extreme drought. We analyzed the variability in forest canopy transpiration versus precipitation from 2011–2013. Evapotranspiration reached 730 mm during flash drought years. When the vapor pressure deficit > 2 kPa and evapotranspiration > 4.27 mm·day(−1), evapotranspiration was mainly controlled through stomatal opening and closing to reduce water loss. However, water exchange mainly occurred in the upper 0–50 cm of the soil. When soil volumetric water content of 50 cm was lower than 0.17 m(3)·m(−3), physiological dehydration occurred in Moso bamboo to reduce transpiration by defoliation, which leads to water-use efficiency decrease. When mean stand density was <3500 trees·ha(−1), the bamboo forest can safely survive the flash drought. Therefore, we recommend thinning Moso bamboo as a management strategy to reduce transpiration in response to future extreme drought events. Additionally, the response function of soil volumetric water content should be used to better simulate evapotranspiration, especially when soil water is limited. MDPI 2019-06-19 2019-06 /pmc/articles/PMC6616449/ /pubmed/31248206 http://dx.doi.org/10.3390/ijerph16122174 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Zhang, Minxia Chen, Shulin Jiang, Hong Lin, Yong Zhang, Jinmeng Song, Xinzhang Zhou, Guomo Water-Use Characteristics and Physiological Response of Moso Bamboo to Flash Droughts |
title | Water-Use Characteristics and Physiological Response of Moso Bamboo to Flash Droughts |
title_full | Water-Use Characteristics and Physiological Response of Moso Bamboo to Flash Droughts |
title_fullStr | Water-Use Characteristics and Physiological Response of Moso Bamboo to Flash Droughts |
title_full_unstemmed | Water-Use Characteristics and Physiological Response of Moso Bamboo to Flash Droughts |
title_short | Water-Use Characteristics and Physiological Response of Moso Bamboo to Flash Droughts |
title_sort | water-use characteristics and physiological response of moso bamboo to flash droughts |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6616449/ https://www.ncbi.nlm.nih.gov/pubmed/31248206 http://dx.doi.org/10.3390/ijerph16122174 |
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