Strata-dependent relationships among temperate forest structure, diversity, and growth rate along a local-scale environmental gradient
Strata-dependent relationships among temperate forest structure, diversity, and growth rate along a local-scale environmental gradient
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沿局部尺度环境梯度的温带森林结构、多样性和生长率之间的层依赖性关系
DOI：
10.1016/j.ecolind.2022.108566
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发表时间：
2022-02
影响因子：
6.9
通讯作者：
Jin Guangze
中科院分区：
文献类型：
--
作者：
Dina Oktavia;Arshad Ali;Pil Sun Park;Jin Guangze
探索林上和林下地层的多样性与功能关系对于理解生态机制、生物多样性保护和森林管理至关重要。本研究旨在探讨中国东北阔叶混交红松林物种多样性与林分结构、环境因子、叶面积指数（LAI）以及林下地层生长速率之间的关系。我们进行了结构方程模型（SEM）来评估环境因素对林间和林下物种多样性、林分结构和生长率的影响；林上和林下物种多样性和林分结构（总断面积、茎密度和胸径变化）对 LAI 及其各自生长速率的影响；以及上林地层对林下地层物种多样性、林分结构和生长速率的影响。我们的结果表明，物种多样性决定了林下地层的生长速率，而茎密度则适合确定林下生长速率。综合 SEM 分别解释林间物种多样性、林下绝对生长率、林间绝对生长率、林下茎密度和 LAI 的 13%、13%、11%、8% 和 7%。上层物种多样性对上层生长有正向直接影响，但对林下生长有负向直接影响。环境因素（即土壤养分和土壤湿度）对林下生长速率产生积极影响，但对林间生长速率产生负面影响。增加林下茎密度可能会增加 LAI；同时，LAI 支持林下生长率。在天然森林中，林间冠层和环境资源的可用性之间的安排是控制物种多样性和最大化林下地层生产力的理想选择。
Exploring diversity-function relationships across overstory and understory strata is crucial for understanding ecological mechanisms, biodiversity conservation and forest management. In this study, we aimed to investigate the relationships among species diversity and stand structure, environmental factors, leaf area index (LAI), and the growth rate of overstory and understory strata in a mixed-broadleaf Korean Pine Forest in Northeast China. We performed structural equation models (SEMs) to evaluate the effects of environmental factors on overstory and understory species diversity, stand structure, and growth rate; the effects of overstory and understory species diversity and stand structure (total basal area, stem density, and diameter at the breast height variation) on the LAI and their respective growth rates; and the effect of overstory stratum on understory stratum species diversity, stand structure, and growth rate. Our results showed that species diversity determined the growth rate for overstory strata, while stem density was appropriate to determine understory growth rate. The integrative SEM accounted for 13, 13, 11, 8, and 7% of the variance in overstory species diversity, understory absolute growth rate, overstory absolute growth rate, understory stem density, and LAI, respectively. The diversity of overstory species had a positive direct influence on overstory growth but a negative direct effect on understory growth. Environmental factors (i.e., soil nutrients and soil moisture) positively influenced the understory growth rate but negatively influenced the overstory growth rate. Increasing understory stem density may increase the LAI; simultaneously, the LAI supported the understory growth rate. In natural forests, an arrangement between the overstory canopy and the availability of environmental resources is ideal for controlling species diversity and maximizing the productivity of both the overstory and understory strata.
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与植物区系组成和林分特征相关的亚热带次生林叶面积指数（LAI）的空间和季节变化
影响因子：
4.9
作者：
Wenjuan Zhu;Wenhua Xiang;Qiong Pan;Yelin Zeng;Shuai Ouyang;Pifeng Lei;Xiangwen Deng;Xi Fang;Changhui Peng
通讯作者：
Changhui Peng
影响因子：
4.6
作者：
Sumida A;Watanabe T;Miyaura T
通讯作者：
Miyaura T
影响因子：
5.5
作者：
S. Russo;P. Brown;Sylvester Tan;S. Davies
通讯作者：
S. Russo;P. Brown;Sylvester Tan;S. Davies
影响因子：
4.8
作者：
S. Wright;J. Yavitt;N. Wurzburger;Benjamin L Turner;E. Tanner;E. Sayer;L. Santiago;M. Kaspari;L. Hedin;K. Harms;Milton N. García;M. Corre
通讯作者：
S. Wright;J. Yavitt;N. Wurzburger;Benjamin L Turner;E. Tanner;E. Sayer;L. Santiago;M. Kaspari;L. Hedin;K. Harms;Milton N. García;M. Corre
影响因子：
6.1
作者：
M. G. Ryan;D. Binkley;J. Fownes;C. Giardina;R. Senock
通讯作者：
M. G. Ryan;D. Binkley;J. Fownes;C. Giardina;R. Senock