Composition and interannual dynamics of tree seedlings in a secondary forest in montane region of eastern Liaoning Province, China

doi:10.17520/biods.2018135

Abstract

Abstract:

To explore the composition and interannual dynamics of tree seedlings in the montane region of eastern Liaoning Province in China, we established 1,600 seedling quadrats of size 5 m × 5 m (25 m²) within a 4-ha plot to monitor forest dynamics. We analyzed species composition, height-class structure, interannual dynamics and spatial distribution of tree seedlings from three censuses (2014 to 2016). We recorded a total of 22 species of tree seedlings during the survey period. The species composition of tree seedlings did not vary significantly among years, but varied greatly among quadrats. Species that dominated as seedlings largely reflected the dominant species among adults. Tree seedling numbers varied significantly among different tree species across years, with Fraxinus rhynchophylla, Acer mono and Juglans mandshurica accounting for 75.6% of the total seedlings in the three censuses. The abundances of F. rhynchophylla and J. mandshurica seedlings varied greatly among three years, while the other species varied little. Similarly, seedling density also varied greatly among different species. We also found interspecific and interannual variation in new seedling recruits and those that died. Recruit abundance during 2014-2015 (3,888) was higher than 2015-2016 (1,710), and the seedling mortality rate was also higher in 2014-2015 (23.7%) than 2015-2016 (12.7%). The mortality rate of recruited seedlings (18.8%) was higher than that of existing seedlings (8.1%) during 2015-2016. Finally, we found that the dominant seedlings showed spatially clustered distributions and the spatial pattern of seedling distributions was consistent with that of adults of the species.

http://jtp.cnki.net/bilingual/detail/html/SWDY201811002

Key words: forest regeneration, interannual dynamics, spatial distribution, montane region of eastern Liaoning Province, secondary forest

Junqi Cai, Dapeng Liu, Shuyuan Zhang, Guo Zong, Jia Liu, Xuejiao Bai. Composition and interannual dynamics of tree seedlings in a secondary forest in montane region of eastern Liaoning Province, China[J]. Biodiv Sci, 2018, 26(11): 1147-1157.

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URL: https://www.biodiversity-science.net/EN/10.17520/biods.2018135

https://www.biodiversity-science.net/EN/Y2018/V26/I11/1147

Figures/Tables 7

References 46

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树种 Species	幼苗数量 No. of seedlings	幼苗密度 Seedling density (mean ± SE, n = 1,600)	幼苗密度变异系数 CV of seedling density (%)	相对多度 Relative abundance		重要值 Importance value
花曲柳 Fraxinus rhynchophylla	5,189	3.685 ± 0.347	376.97	32.93	10.81	21.87
色木槭 Acer mono	3,910	2.777 ± 0.146	209.71	24.81	17.13	20.97
胡桃楸 Juglans mandshurica	1,712	1.216 ± 0.040	131.52	10.86	19.53	15.20
暴马丁香 Syringa amurensis	827	0.587 ± 0.042	288.83	5.25	7.13	6.19
假色槭 Acer pseudo-sieboldianum	742	0.527 ± 0.044	336.29	4.71	5.53	5.12
水曲柳 Fraxinus mandshruica	622	0.442 ± 0.042	379.44	3.95	5.42	4.69
山杨 Populus davidiana	614	0.436 ± 0.046	425.41	3.90	3.17	3.54
灯台树 Bothrocaryum controversum	379	0.269 ± 0.023	348.90	2.40	4.58	3.49
裂叶榆 Ulmus laciniata	291	0.207 ± 0.015	283.45	1.85	4.93	3.39
蒙古栎 Quercus mongolica	240	0.170 ± 0.016	386.00	1.52	3.05	2.29
青楷槭 Acer tegmentosum	208	0.148 ± 0.014	379.95	1.32	3.01	2.17
小楷槭 Acer komarovii	178	0.126 ± 0.012	383.95	1.13	2.82	1.98
怀槐 Maackia amurensis	180	0.128 ± 0.012	378.25	1.14	2.71	1.93
稠李 Prunus padus	172	0.122 ± 0.013	440.27	1.09	2.55	1.82
水榆花楸 Sorbus alnifolia	143	0.102 ± 0.010	379.01	0.91	2.57	1.74
千金榆 Carpinus cordata	154	0.109 ± 0.012	434.08	0.98	2.34	1.66
紫椴 Tilia amurensis	86	0.061 ± 0.007	483.57	0.55	1.20	0.88
花楷槭 Acer ukurunduense	41	0.029 ± 0.008	1,105.50	0.26	0.58	0.42
黄檗 Phellodendron amurense	33	0.023 ± 0.007	1,215.70	0.21	0.42	0.32
春榆 Ulmus propinqua	29	0.021 ± 0.005	1,022.49	0.18	0.35	0.27
黄榆 Ulmus macrocarpa	7	0.005 ± 0.002	1,415.22	0.04	0.12	0.08
三花槭 Acer triflorum	3	0.002 ± 0.001	2,164.87	0.02	0.07	0.05
总计 Total	15,760			100.00	100.00	100.00

树种 Species	幼苗数量 No. of seedlings	幼苗密度 Seedling density (mean ± SE, n = 1,600)	幼苗密度变异系数 CV of seedling density (%)	相对多度 Relative abundance		重要值 Importance value
花曲柳 Fraxinus rhynchophylla	5,189	3.685 ± 0.347	376.97	32.93	10.81	21.87
色木槭 Acer mono	3,910	2.777 ± 0.146	209.71	24.81	17.13	20.97
胡桃楸 Juglans mandshurica	1,712	1.216 ± 0.040	131.52	10.86	19.53	15.20
暴马丁香 Syringa amurensis	827	0.587 ± 0.042	288.83	5.25	7.13	6.19
假色槭 Acer pseudo-sieboldianum	742	0.527 ± 0.044	336.29	4.71	5.53	5.12
水曲柳 Fraxinus mandshruica	622	0.442 ± 0.042	379.44	3.95	5.42	4.69
山杨 Populus davidiana	614	0.436 ± 0.046	425.41	3.90	3.17	3.54
灯台树 Bothrocaryum controversum	379	0.269 ± 0.023	348.90	2.40	4.58	3.49
裂叶榆 Ulmus laciniata	291	0.207 ± 0.015	283.45	1.85	4.93	3.39
蒙古栎 Quercus mongolica	240	0.170 ± 0.016	386.00	1.52	3.05	2.29
青楷槭 Acer tegmentosum	208	0.148 ± 0.014	379.95	1.32	3.01	2.17
小楷槭 Acer komarovii	178	0.126 ± 0.012	383.95	1.13	2.82	1.98
怀槐 Maackia amurensis	180	0.128 ± 0.012	378.25	1.14	2.71	1.93
稠李 Prunus padus	172	0.122 ± 0.013	440.27	1.09	2.55	1.82
水榆花楸 Sorbus alnifolia	143	0.102 ± 0.010	379.01	0.91	2.57	1.74
千金榆 Carpinus cordata	154	0.109 ± 0.012	434.08	0.98	2.34	1.66
紫椴 Tilia amurensis	86	0.061 ± 0.007	483.57	0.55	1.20	0.88
花楷槭 Acer ukurunduense	41	0.029 ± 0.008	1,105.50	0.26	0.58	0.42
黄檗 Phellodendron amurense	33	0.023 ± 0.007	1,215.70	0.21	0.42	0.32
春榆 Ulmus propinqua	29	0.021 ± 0.005	1,022.49	0.18	0.35	0.27
黄榆 Ulmus macrocarpa	7	0.005 ± 0.002	1,415.22	0.04	0.12	0.08
三花槭 Acer triflorum	3	0.002 ± 0.001	2,164.87	0.02	0.07	0.05
总计 Total	15,760			100.00	100.00	100.00

	自由度 df	平方和 SS	均方和 MS	F	P
年份 Year	2	343.18	171.591	4,016.3	0.001***
残差 Residuals	4,797	204.95	0.043
总数 Total	4,799	548.13
2014 vs. 2015				2,674.386	0.001
2014 vs. 2016				5,036.132	0.001
2015 vs. 2016				7,513.394	0.001

	自由度 df	平方和 SS	均方和 MS	F	P
年份 Year	2	343.18	171.591	4,016.3	0.001***
残差 Residuals	4,797	204.95	0.043
总数 Total	4,799	548.13
2014 vs. 2015				2,674.386	0.001
2014 vs. 2016				5,036.132	0.001
2015 vs. 2016				7,513.394	0.001

	自由度 df	平方和 SS	均方和 MS	F	P
年份 Year	1	166.74	166.744	2,701.5	0.001***
残差 Residuals	3,198	197.39	0.062
总数 Total	3,198	364.13