亚热带常绿阔叶林62种木本植物凋落叶碳氮磷化学计量特征

doi:10.13287/j.1001-9332.202305.005

应用生态学报 ›› 2023, Vol. 34 ›› Issue (5): 1153-1160.doi: 10.13287/j.1001-9332.202305.005

亚热带常绿阔叶林62种木本植物凋落叶碳氮磷化学计量特征

李澳归^1,2, 蔡世锋³, 罗素珍³, 王小红^1,2*, 曹丽荣^1,2, 王雪^1,2, 林成芳^1,2, 陈光水^1,2

¹福建师范大学地理科学学院/湿润亚热带山地生态国家重点实验室培育基地, 福州 350007;
²福建三明森林生态系统与全球变化国家野外科学观测研究站, 福建三明 365000;
³福建省尤溪国有林场, 福建尤溪 365100

收稿日期:2022-10-26 接受日期:2023-02-20 出版日期:2023-05-15 发布日期:2023-11-15
通讯作者: *E-mail: wangxh@fjnu.edu.cn
作者简介:李澳归, 男, 1999年生, 硕士研究生。主要从事森林生态系统碳氮循环研究。E-mail: aoguili1999@163.com
基金资助:
福建省科技厅对外合作项目(2021I0011)和国家自然科学基金项目(31770663)

C, N, and P stoichiometry for leaf litter of 62 woody species in a subtropical evergreen broadleaved forest

LI Aogui^1,2, CAI Shifeng³, LUO Suzhen³, WANG Xiaohong^1,2*, CAO Lirong^1,2, WANG Xue^1,2, LIN Chengfang^1,2, CHEN Guangshui^1,2

¹School of Geographical Sciences, Fujian Normal University/Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China;
²Sanming Forest Ecosystem and Global Change National Observation and Research Station of Fujian Province, Sanming 365000, Fujian, China;
³Youxi State-owned Forest Farm of Fujian Province, Youxi 365100, Fujian, China

Received:2022-10-26 Accepted:2023-02-20 Online:2023-05-15 Published:2023-11-15

摘要/Abstract

摘要： 为揭示亚热带常绿阔叶林凋落叶碳(C)、氮(N)和磷(P)化学计量特征,本研究测定了福建省三明格氏栲自然保护区天然林内62种主要木本植物凋落叶C、N和P含量,分析叶习性(常绿、落叶)、生活型(乔木、小乔木或灌木)以及主要科之间凋落叶化学计量的差异,通过Blomberg's K衡量系统发育信号,分析了科水平分化时间与凋落叶化学计量之间的相关性。结果表明: 62种木本植物凋落物C、N、P含量分别为405.97～512.16、4.45～27.11和0.21～2.53 g·kg^-1,C/N、C/P和N/P分别为18.6～106.2、195.9～2146.8和3.5～68.9。常绿树种凋落叶P含量显著低于落叶树种,C/P和N/P显著高于落叶树种,二者之间的C、N含量和C/N无显著差异;乔木与小乔木或灌木之间的化学计量均无显著性差异。系统发育对凋落叶C、N含量和C/N有显著影响,对P含量、C/P和N/P无显著影响。科水平分化时间与N含量呈显著负相关,与C/N呈显著正相关。壳斗科凋落叶倾向于高C、N含量、C/P和N/P,低P含量和C/N;无患子科则表现出相反的趋势。与全球尺度相比,亚热带地区凋落物具有高C、N含量和N/P,以及低P含量、C/N和C/P的特征;受系统发育的影响,进化较古老的树种凋落叶具有较低的N含量和较高的C/N;凋落叶之间的化学计量差异不受生活型的影响;不同叶习性树种之间的P含量、C/P和N/P差异显著,但整体表现出一定的趋同效应。

关键词: 亚热带森林, 木本植物, 凋落叶, 化学计量, 系统发育

Abstract: To understand leaf litter stoichiometry in a subtropical evergreen broadleaved forest, we measured the contents of carbon (C), nitrogen (N) and phosphorus (P) in leaf litters of 62 main woody species in a natural forest of C. kawakamii Nature Reserve in Sanming, Fujian Province. Differences in leaf litter stoichiometry were analyzed across leaf forms (evergreen, deciduous), life forms (tree, semi-tree or shrub), and main families. Additionally, the phylogenetic signal was measured by Blomberg's K to explore the correlation between family level differentiation time and litter stoichiometry. Our results showed that the contents of C, N and P in the litter of 62 woody species were 405.97-512.16, 4.45-27.11, and 0.21-2.53 g·kg^-1, respectively. C/N, C/P and N/P were 18.6-106.2, 195.9-2146.8, and 3.5-68.9, respectively. Leaf litter P content of evergreen tree species was significantly lower than that of deciduous tree species, and C/P and N/P of evergreen tree species were significantly higher than those of deciduous tree species. There was no significant difference in C, N content and C/N between the two leaf forms. There was no significant difference in litter stoichiometry among trees, semi-trees and shrubs. Effects of phylogeny on C, N content and C/N in leaf litter was significant, but not on P content, C/P and N/P. Family differentiation time was negatively correlated with leaf litter N content, and positively correlated with C/N. Leaf litter of Fagaceae had high C and N contents, C/P and N/P, and low P content and C/N, with an opposite trend for Sapidaceae. Our findings indicated that litter in subtropical forest had high C, N content and N/P, but low P content, C/N, and C/P, compared with the global scale average value. Litter of tree species in older sequence of evolutionary development had lower N content but higher C/N. There was no difference of leaf litter stoichiometry among life forms. There were significant differences in P content, C/P, and N/P between different leaf forms, with a characteristic of convergence.

Key words: subtropical forest, woody species, leaf litter, stoichiometry, phylogeny

李澳归, 蔡世锋, 罗素珍, 王小红, 曹丽荣, 王雪, 林成芳, 陈光水. 亚热带常绿阔叶林62种木本植物凋落叶碳氮磷化学计量特征[J]. 应用生态学报, 2023, 34(5): 1153-1160.

LI Aogui, CAI Shifeng, LUO Suzhen, WANG Xiaohong, CAO Lirong, WANG Xue, LIN Chengfang, CHEN Guangshui. C, N, and P stoichiometry for leaf litter of 62 woody species in a subtropical evergreen broadleaved forest[J]. Chinese Journal of Applied Ecology, 2023, 34(5): 1153-1160.

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亚热带常绿阔叶林62种木本植物凋落叶碳氮磷化学计量特征

C, N, and P stoichiometry for leaf litter of 62 woody species in a subtropical evergreen broadleaved forest

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