吉林东部天然次生林下光强衰减的空间分布特征

doi:10.12302/j.issn.1000-2006.202110015

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南京林业大学学报（自然科学版） ›› 2023, Vol. 47 ›› Issue (1): 101-108.doi: 10.12302/j.issn.1000-2006.202110015

吉林东部天然次生林下光强衰减的空间分布特征

王麒淞(), 国庆喜()

东北林业大学生态研究中心,森林生态系统可持续经营教育部重点实验室,黑龙江哈尔滨 150040

收稿日期:2021-10-09 接受日期:2022-03-29 出版日期:2023-01-30 发布日期:2023-02-01
通讯作者: 国庆喜
基金资助:
科技基础资源调查专项(2019FY101702)

The spatial distribution characteristics of light intensity attenuation under natural secondary forests in eastern Jilin Province, China

WANG Qisong(), GUO Qingxi()

Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, Center for Ecological Research, Northeast Forestry University, Harbin 150040, China

Received:2021-10-09 Accepted:2022-03-29 Online:2023-01-30 Published:2023-02-01
Contact: GUO Qingxi

摘要/Abstract

摘要： 【目的】 探究长白山北坡不同林型天然次生林下空间尺度及方位间的光强衰减特征。【方法】 以吉林东部长白山北坡天然次生林5块0.6 hm²样地为研究对象,调查了样地内乔木生长及光强衰减状况,对林型、空间尺度及方位进行划分,采用移动窗口法分析不同空间尺度下森林群落结构对林下光强衰减的影响。【结果】 吉林东部天然次生林乔木胸高断面积与林下光强衰减率相关性显著(P<0.01)。随着空间尺度增大,乔木胸高断面积与光强衰减率的相关系数逐渐增大,大部分林型在内侧窗口达到10 m×10 m时,光强衰减率与乔木胸高断面积显著正相关(P<0.01),在25 m×25 m尺度时相关系数最大,内侧窗口周围10 m内的乔木也与内侧窗口下的光强衰减率显著正相关(P<0.01)。东侧、南侧的树木对于内侧窗口下的光强衰减率影响比西侧、北侧影响更大。【结论】 通过移动窗口法可以分析不同林型乔木对于林下光强衰减的影响范围,与耐阴树种相比,喜光树种乔木胸高断面积与光强衰减率在更多尺度下显著相关;在(10 m×10 m)~(40 m×40 m)的尺度范围内,多数林型乔木胸高断面积与光强衰减率显著正相关(P<0.01)。不同方位的乔木对于光强衰减的影响也存在差异。

关键词: 天然次生林, 光环境, 光强衰减, 空间异质性, 移动窗口法, 长白山北坡

Abstract:

【Objective】 The study explored the characteristics of light intensity attenuation among different forest types, spatial scales, and orientations of natural secondary forests in eastern Jilin Province, China. 【Method】 The tree growth and light intensity attenuation were investigated in five plots of 0.6 hm² each by dividing them according to forest types, spatial scales, and orientations, and the moving window method was then used to analyze the effect of forest community structure on understory light. 【Result】 In the natural secondary forests of eastern Jilin, the arbor basal area was significantly correlated with the understory light intensity attenuation rate (P<0.01). With increasing spatial scale, the correlation coefficient between the arbor basal area and light intensity attenuation rate also increased gradually. When the inner window of most forest types reached 10 m × 10 m, the light intensity attenuation rate was positively significantly related to the arbor basal area (P<0.01). The maximum correlation coefficient was at a scale of 25 m × 25 m. The presence of trees within 10 m of the inner window was also positively significantly related to the light intensity attenuation rate under the inner window (P<0.01). The trees on the east and south sides had a greater impact on the light intensity attenuation rate under the inner window than those on the west and north sides. 【Conclusion】 The moving window method can be used to analyze the range of influence exerted by different forest types on the light intensity attenuation. Light-loving tree species demonstrated a highly significant correlation between the arbor basal area and the light intensity attenuation rate at a greater range of scales than shade-tolerant species. In the scale range of (10 m×10 m)-(40 m×40 m), the arbor basal area of most forest-type trees was significantly positively correlated with the light intensity attenuation rate (P<0.01). Differences in the orientation of trees also affect the attenuation of light intensity.

Key words: natural secondary forest, light environment, light intensity attenuation, spatial heterogeneity, moving window method, north slope of Changbai Mountains

中图分类号:

S718.5

王麒淞,国庆喜. 吉林东部天然次生林下光强衰减的空间分布特征[J]. 南京林业大学学报（自然科学版）, 2023, 47(1): 101-108.

WANG Qisong, GUO Qingxi. The spatial distribution characteristics of light intensity attenuation under natural secondary forests in eastern Jilin Province, China[J].Journal of Nanjing Forestry University (Natural Science Edition), 2023, 47(1): 101-108.DOI: 10.12302/j.issn.1000-2006.202110015.

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样地号 plot No.	海拔/m altitude	坡度/(°) slope	平均胸径/cm mean DBH	林分密度/ (株·hm^-2) stand density	主要树种(占比/%) main tree species (proportion)	林型代号 code of forest type
1	970	2	17.9	932	长白落叶松(84),白桦(5),蒙古栎(5)	LP
2	1 047	15	17.7	1 166	蒙古栎(73),长白落叶松(11),黑桦(4)	QP
3	996	25	15.6	1 560	蒙古栎(58),长白落叶松(20),黑桦(5)	LQ
4	1 057	2	12.4	2 593	长白落叶松(35),蒙古栎(28),白桦(12),黑桦(12)	QL
5	864	5	16.0	2 158	臭冷杉(35),紫椴(15),红松(15),春榆(9),红皮云杉(9)	AT

林型 forest type	光照度/lx			衰减率 attenuation rate			方差 variance
林型 forest type	均值 mean	中位数 median	林外均值 mean outside forest	均值 mean	中位数 median		方差 variance
LP	15 617	5 625	82 194	0.81	0.92	0.06
QP	7 476	2 803	93 451	0.92	0.97	0.01
LQ	16 493	7 748	91 631	0.82	0.92	0.04
QL	18 922	8 109	90 105	0.79	0.91	0.09
AT	2 023	1 098	102 023	0.97	0.98	<0.01

吉林东部天然次生林下光强衰减的空间分布特征

The spatial distribution characteristics of light intensity attenuation under natural secondary forests in eastern Jilin Province, China

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组合编号 combination No.	内侧窗口大小/m Inner window size	延伸距离/m extend length			组合编号 combination No.	内侧窗口大小/m middle window size	延伸距离/m extend length
组合编号 combination No.	内侧窗口大小/m Inner window size	南侧south	东侧east	西侧west	组合编号 combination No.	内侧窗口大小/m middle window size	南侧south	东侧east	西侧west
11	5×5	20	10	10	21	20×20	0	0	0
12	10×10	0	0	0	22	20×20	5	5	5
13	10×10	5	5	5	23	20×20	15	10	10
14	10×10	10	10	10	24	20×20	20	10	10
15	10×10	15	10	10	25	25×25	0	0	0
16	10×10	20	10	10	26	25×25	5	5	5
17	15×15	0	0	0	27	25×25	10	10	10
18	15×15	5	5	5	28	25×25	15	10	10
19	15×15	10	10	10	29	25×25	20	10	10
20	15×15	15	10	10	30	30×30	0	0	0

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[3]	赵颖慧, 郭新龙, 甄贞. 基于光学-ALS变量组合和非参数模型的天然次生林地上生物量估算[J]. 南京林业大学学报（自然科学版）, 2021, 45(4): 49-57.
[4]	陈晨, 刘光武. 黄龙山林区白皮松天然次生林生长规律研究[J]. 南京林业大学学报（自然科学版）, 2020, 44(6): 125-130.
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