The Right-Skewed Distribution of Fine-Root Size in Three Temperate Forests in Northeastern China.
The Right-Skewed Distribution of Fine-Root Size in Three Temperate Forests in Northeastern China.
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DOI：
10.3389/fpls.2021.772463
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发表时间：
2021
影响因子：
5.6
通讯作者：
Li MH
中科院分区：
文献类型：
--
作者：
Wang C;Brunner I;Wang J;Guo W;Geng Z;Yang X;Chen Z;Han S;Li MH
树木可以建立细根系统，根的大小变化很大（例如，细根直径）和根数（例如，分支模式），以优化森林生态系统的地下资源获取。与地上可见的叶子相比，关于细根大小的分布和不平等以及细根大小和数量之间的关键关联的信息仍然有限。在中国东北三个温带森林（长白山、仙人洞和帽儿山）共采集到51个树种的3，848个二级细根中，一级细根27，573个。研究了细根长度、直径和面积（细根大小）的分布和不等性，以及它们与细根分枝强度和细根比（细根数）的权衡关系。我们的研究结果表明，一阶细根大小在不同树种的强右偏分布。单峰频率分布，观察到在所有三个采样森林的一阶细根长度和面积和CBS和XRD的一阶细根直径，而一个显着的双峰频率分布的一阶细根直径出现在MES。一级细根直径的基尼系数以XRD最大，MES最小。一阶细根的大小表现出一致的线性下降，增加根数。我们的研究结果表明，一个共同的右偏分布与单峰或双峰的细根大小和广义之间的权衡细根大小和数量在温带树种。我们的研究结果将大大提高我们对温带树木和森林地下资源获取策略的全面理解。
Trees can build fine-root systems with high variation in root size (e.g., fine-root diameter) and root number (e.g., branching pattern) to optimize belowground resource acquisition in forest ecosystems. Compared with leaves, which are visible above ground, information about the distribution and inequality of fine-root size and about key associations between fine-root size and number is still limited. We collected 27,573 first-order fine-roots growing out of 3,848 second-order fine-roots, covering 51 tree species in three temperate forests (Changbai Mountain, CBS; Xianrendong, XRD; and Maoershan, MES) in Northeastern China. We investigated the distribution and inequality of fine-root length, diameter and area (fine-root size), and their trade-off with fine-root branching intensity and ratio (fine-root number). Our results showed a strong right-skewed distribution in first-order fine-root size across various tree species. Unimodal frequency distributions were observed in all three of the sampled forests for first-order fine-root length and area and in CBS and XRD for first-order fine-root diameter, whereas a marked bimodal frequency distribution of first-order fine-root diameter appeared in MES. Moreover, XRD had the highest and MES had the lowest inequality values (Gini coefficients) in first-order fine-root diameter. First-order fine-root size showed a consistently linear decline with increasing root number. Our findings suggest a common right-skewed distribution with unimodality or bimodality of fine-root size and a generalized trade-off between fine-root size and number across the temperate tree species. Our results will greatly improve our thorough understanding of the belowground resource acquisition strategies of temperate trees and forests.
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影响因子：
9.4
作者：
FITTER, AH;STICKLAND, TR;WILSON, GW
通讯作者：
WILSON, GW
影响因子：
9.4
作者：
Freschet, Gregoire T.;Roumet, Catherine;Stokes, Alexia
通讯作者：
Stokes, Alexia
影响因子：
9.4
作者：
Ekblad, Alf;Mikusinska, Anna;Eriksson, Ulrika
通讯作者：
Eriksson, Ulrika
DOI：
10.1073/pnas.1601006113
发表时间：
2016-08-02
影响因子：
11.1
作者：
Chen, Weile;Koide, Roger T.;Eissenstat, David M.
通讯作者：
Eissenstat, David M.
影响因子：
5.5
作者：
Freschet, Gregoire T.;Valverde-Barrantes, Oscar J.;Roumet, Catherine
通讯作者：
Roumet, Catherine