Stemflow Measurement on Large Leaning Quercus serrata Trees: Examination of Stem Lean Effect on Stemflow

IF 3.2 3区 地球科学 Q1 Environmental Science
Takanori Sato, Khotaro Ohosawa, Kazunari Ebata, Yoshitaka Matsumoto
{"title":"Stemflow Measurement on Large Leaning Quercus serrata Trees: Examination of Stem Lean Effect on Stemflow","authors":"Takanori Sato,&nbsp;Khotaro Ohosawa,&nbsp;Kazunari Ebata,&nbsp;Yoshitaka Matsumoto","doi":"10.1002/hyp.70046","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>Stemflow measurements were performed on seven <i>Quercus serrata</i> and canopy structure metrics were obtained to identify factors that affect stemflow. Among the seven stems, two exhibited a large stem lean (&gt; 20°). Although a linear relationship between rainfall and stemflow was shown in all trees, stemflow volume on the highly leaning stems (Nos. 6 and 7) was clearly smaller than those on the others. To extract canopy structure metrics effective on stemflow, GLM analysis was conducted. The objective variable was the slope of the regression line <i>a</i> between rainfall and stemflow. Canopy structure metrics as explanatory variables were the diameter at breast height DBH, tree height <i>H</i>, canopy projection area CPA, stem lean parameters <i>L</i> and <i>L</i><sub><i>d</i></sub>, and stem length (SL). <i>L</i> is stem lean from the base to the top and <i>L</i><sub><i>d</i></sub> is stem lean at breast height. GLMs were constructed using all combinations of explanatory variables. GLMs that included at least one explanatory variable for which a statistically significant had been shown were selected. First, GLMs constructed using DBH, <i>L</i>, and <i>L</i><sub><i>d</i></sub> were selected. The relationship between DBH and <i>a</i> was positive, but the <i>R</i><sup>2</sup> value using all data (<i>R</i><sup>2</sup> = 0.39) was smaller than upon excluding stem Nos. 6 and 7 (<i>R</i><sup>2</sup> = 0.85). This indicated the need to consider DBH and stem lean simultaneously. Second, a GLM constructed only using <i>H</i> was selected. <i>R</i><sup>2</sup> values of DBH with <i>H</i> and <i>SL</i> were 0.57 and 0.72, respectively. According to the definition of <i>H</i>, the more the stem leans, the lower <i>H</i> is measured, at the same value of <i>SL</i>. Thus, <i>H</i> was a parameter that includes the effect of stem lean. Our results indicated that it is necessary to consider stem lean when evaluating the process of canopy interception in deciduous broadleaf forests.</p>\n </div>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 1","pages":""},"PeriodicalIF":3.2000,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Hydrological Processes","FirstCategoryId":"89","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/hyp.70046","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Environmental Science","Score":null,"Total":0}
引用次数: 0

Abstract

Stemflow measurements were performed on seven Quercus serrata and canopy structure metrics were obtained to identify factors that affect stemflow. Among the seven stems, two exhibited a large stem lean (> 20°). Although a linear relationship between rainfall and stemflow was shown in all trees, stemflow volume on the highly leaning stems (Nos. 6 and 7) was clearly smaller than those on the others. To extract canopy structure metrics effective on stemflow, GLM analysis was conducted. The objective variable was the slope of the regression line a between rainfall and stemflow. Canopy structure metrics as explanatory variables were the diameter at breast height DBH, tree height H, canopy projection area CPA, stem lean parameters L and Ld, and stem length (SL). L is stem lean from the base to the top and Ld is stem lean at breast height. GLMs were constructed using all combinations of explanatory variables. GLMs that included at least one explanatory variable for which a statistically significant had been shown were selected. First, GLMs constructed using DBH, L, and Ld were selected. The relationship between DBH and a was positive, but the R2 value using all data (R2 = 0.39) was smaller than upon excluding stem Nos. 6 and 7 (R2 = 0.85). This indicated the need to consider DBH and stem lean simultaneously. Second, a GLM constructed only using H was selected. R2 values of DBH with H and SL were 0.57 and 0.72, respectively. According to the definition of H, the more the stem leans, the lower H is measured, at the same value of SL. Thus, H was a parameter that includes the effect of stem lean. Our results indicated that it is necessary to consider stem lean when evaluating the process of canopy interception in deciduous broadleaf forests.

求助全文
约1分钟内获得全文 求助全文
来源期刊
Hydrological Processes
Hydrological Processes 环境科学-水资源
CiteScore
6.00
自引率
12.50%
发文量
313
审稿时长
2-4 weeks
期刊介绍: Hydrological Processes is an international journal that publishes original scientific papers advancing understanding of the mechanisms underlying the movement and storage of water in the environment, and the interaction of water with geological, biogeochemical, atmospheric and ecological systems. Not all papers related to water resources are appropriate for submission to this journal; rather we seek papers that clearly articulate the role(s) of hydrological processes.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信