Partial canopy loss of mangrove trees: Mitigating water scarcity by physical adaptation and feedback on porewater salinity
Partial canopy loss of mangrove trees: Mitigating water scarcity by physical adaptation and feedback on porewater salinity
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红树林树冠部分丧失：通过物理适应和孔隙水盐度反馈缓解水资源短缺
DOI：
10.1016/j.ecss.2020.106797
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发表时间：
2021
影响因子：
2.8
通讯作者：
Berger
中科院分区：
文献类型：
--
作者：
Peters;Lovelock;López-Portillo;Bathmann;Wimmler;Walther;Berger
红树林中的树种Avicenniacan在暴露于不利的环境条件时，如孔隙水盐度增加，会脱落树冠部分。基于个体的模型BETTINA能够根据树木的异速生长特性量化树木的水分利用。因此，它提供了一个工具，以模拟植物的大小和密度之间的平衡在红树林立场和孔隙水盐度。当该模型与一个简单的水平衡方法相结合时，树木的用水量对应于从土壤中吸收的水分，并与水通量相结合，增加根区的盐度。年变化的海平面，潮汐制度，地下水流入，和降水量的联合系统的平衡有影响。较高的盐度导致较低的潜在梯度和减少植物的水分吸收。结合建模方法（单树模型BETTINA与一个简单的水平衡方法），我们研究了连续的部分树冠损失对树木生存的抑制作用。我们发现，（i）树是能够减少水的需求和吸收，从而可能会减少树的土壤水盐的影响，（ii）减少分支长度导致木质部流动阻力减少，和（iii）高度的减少有一个小的积极影响叶和土壤之间的水势梯度。基于个体的模型可以增强我们对部分冠层损失对植物-土壤组合系统水分平衡的调节作用的理解。
Trees species in the mangrove genusAvicenniacan shed canopy parts when exposed to adverse environmental conditions, such as increases in porewater salinity. The individual-based model BETTINA enables the quantification of the tree's water use depending on its allometric characteristics. It thus provides a tool to model the equilibrium between plant size and density in a mangrove stand and porewater salinity. When the model is coupled with a simple water balance approach, the water use of trees corresponds to water uptake from the soil and, in combination with water fluxes, an increase of salinity in the root zone. Annual variations of the sea level, the tidal regime, groundwater inflow, and precipitation have an impact on the equilibrium of the combined system. Higher salinities lead to lower potential gradients and reduced water uptake of the plant. With a combined modelling approach (single tree model BETTINA with a simple water balance approach), we examined the dampening effects of consecutive partial canopy loss for the survival of the tree. We found that (i) the tree is able to decrease water demand and uptake and thus may reduce the tree's effect on soil water salinity, (ii) the reduced branch length leads to a reduced xylem flow resistance, and (iii) the reduction in height has a small positive effect on the water potential gradient between leaves and soil. Individual-based models can enhance our understanding of the regulating impact of the partial canopy loss on water balance in the combined plant-soil system.
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影响因子：
2.8
作者：
Eslami-Andargoli, L.;Dale, Per;Chaseling, J.
通讯作者：
Chaseling, J.
影响因子：
6.4
作者：
C. Lovelock;M. Ball;I. Feller;Bettina M. J. Engelbrecht;Mei Ling Ewe
通讯作者：
C. Lovelock;M. Ball;I. Feller;Bettina M. J. Engelbrecht;Mei Ling Ewe
影响因子：
4
作者：
Hao, Guang-You;Jones, Tim J.;Goldstein, Guillermo
通讯作者：
Goldstein, Guillermo
离子和水进入热带红树林木质部汁液的运动
影响因子：
1.8
作者：
C. Field
通讯作者：
C. Field
影响因子：
3
作者：
Muller, Etienne;Lambs, Luc;Fromard, Francois
通讯作者：
Fromard, Francois