The variability of stemflow generation in a natural beech stand (Fagus orientalis Lipsky) in relation to rainfall and tree traits
The variability of stemflow generation in a natural beech stand (Fagus orientalis Lipsky) in relation to rainfall and tree traits
复制标题
天然山毛榉林（Fagus orientalis Lipsky）茎流生成的变异性与降雨量和树木性状的关系
DOI：
10.1002/eco.2198
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发表时间：
2020
期刊：
影响因子：
2.6
通讯作者：
Nanko Kazuki
中科院分区：
文献类型：
--
作者：
Dezhban Atefeh;Attarod Pedram;Zahedi Amiri Ghavamudin;Pypker Thomas G.;Nanko Kazuki
树干径流是一个重要的过程，对森林生态系统的水文、地球化学和生态学都有重要影响。本研究的目的是量化的SF（产量和漏斗比，FR）的山毛榉（水青冈）树木和降雨特性之间的关系，以评估的SF产量和FR的大小，在不同的降雨类型的树木性状的影响。2016年4月至2017年11月，在伊朗Hyrcanian森林的天然不均匀年龄山毛榉林中进行了基于事件的测量。研究地块的树木密度为188株ha− 1，断面积为51 m2 ha −1。SF体积在三个直径等级（10-40、40-70和>70 cm;n= 3/等级）中测量。在25次降雨过程中，SF、SF%和FR的平均值分别为3.22 mm、0.41%和1.11。线性回归分析表明，总降雨量与SF产量和FR的相关性最强（P值<.01）。与林木结构性状的线性回归分析表明，冠层投影面积、胸径和苔藓覆盖率分别对50 mm降雨量下的SF产量有显著影响<15 to >，FR随树高、胸径和苔藓覆盖率的增加而显著降低（均P <.05）。较小的树木比高大的树木更集中的SF。Pearson相关分析表明，树高、冠层投影面积、MCP与胸径呈极显著正相关（P <.01;r≥ .87）。因此，在本研究中，SF的产生与胸径更相关。研究结果可帮助管理者优化落叶林的管理策略，通过促进大径树沿着小径树，优化水分有限森林生态系统中SF的水分输入。
Stemflow (SF) has been recognised as an important process that can exert considerable effects on the hydrology, biogeochemistry, and ecology of wooded ecosystems. The aim of this study was to quantify the relationship between SF (yields and funnelling ratios, FRs) of beech (Fagus orientalis) trees and rainfall characteristics, to evaluate the effects of tree traits on SF yield and the magnitudes of FRs in differing rainfall classes. Event‐based measurements were carried out from April 2016 to November 2017 during the leafed‐out periods in a natural uneven‐aged beech stand located in the Hyrcanian forest of Iran. Tree density in the studied plot was 188 trees ha−1with a basal area of 51 m2ha−1. SF volume was measured in three diameter classes (10–40, 40–70, and >70 cm;n= 3 per class). During the 25 rainfall events SF, SF%, and FR were 3.22 mm, 0.41%, and 1.11 on average, respectively. The linear regression analysis revealed that gross rainfall had the strongest correlation with SF yield and FR (Pvalue <.01). The linear regression with the trees structural traits indicated that canopy projected area, diameter at breast height (DBH), and mosses cover percentage, respectively, strongly influence SF yield for rainfall <15 to >50 mm. FR significantly decreased with increasing tree height, DBH, and mosses cover percentage (allPvalues <.05). Smaller trees concentrated more SF than tall and large DBH trees. Pearson correlation analysis indicated tree height, canopy projected area, and MCP were positively and significantly correlated to DBH (Pvalue <.01;r≥ .87). Therefore, SF generation in the present study is more associated with DBH. Our findings could assist managers to optimise the management strategies of deciduous forest via promotion of some large DBH trees along with small DBH trees to optimise water inputs via SF in water‐limited forest ecosystems.