Comparisons of community characteristics among three natural forests of Cyclocarya paliurus in the subtropical region of China

doi:10.12302/j.issn.1000-2006.202005017

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (1): 29-35.doi: 10.12302/j.issn.1000-2006.202005017

Special Issue: 青钱柳培育与选优专题

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Comparisons of community characteristics among three natural forests of Cyclocarya paliurus in the subtropical region of China

ZHOU Yongsheng¹(), XU Ziheng¹, YUAN Fayin²^,³, SHANG Xulan¹^,², SUN Caoweng¹^,², FANG Shengzuo¹^,²^,^*()

1. College of Forestry, Nanjing Forestry University, Nanjing 210037,China
2. Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing 210037,China
3. College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037,China

Received:2020-05-13 Accepted:2020-06-30 Online:2021-01-30 Published:2021-02-01
Contact: FANG Shengzuo E-mail:1093673074@qq.com;fangsz@njfu.edu.cn

Abstract

Abstract:

【Objective】 In order to explore the main factors that affect the regeneration of natural Cyclocarya paliurus forests and a provide a scientific strategy and theoretical basis for the protection and sustainable utilization of natural resources, the diversity of plants, species composition and structure of different geographical distributions of C. paliurus communities were investigated. 【Method】 A typical sample-plot survey method was used to investigate species composition, species diversity characteristics, flora characteristics, and community similarity in different geographically distributed communities of C. paliurus. Their population structure and regeneration status were evaluated using a diameter grade approach, instead of age. 【Result】 There were 70 species belonging to 50 genera and 32 families in the Muchuan community of Sichuan Province (M community), 96 species belonging to 79 genera and 50 families in the Jinzhongshan community of Guangxi Province (J community), and 126 species belonging to 100 genera and 59 families in the Hefeng community of Hubei Province (H community), respectively. However, the floristic characteristics were not significantly different among three communities investigated, all of which showed obvious subtropical and temperate elements. The dynamic trends of species diversity and species richness were similar among the three communities, all of which showed the order of tree indexes was tree layers > shrub layers > herb layers. The species diversity and richness of three communities were generally represented as H community > J community > M community. The structures of communities were moderately dissimilar, where the similarity among three communities was M and J > M and H > J and H. 【Conclusion】 Overall, the species composition of the communities in different geographical locations was obviously different, and the similarity level was low, but its structural characteristics were similar. The tree layer species were dominant in all communities, which led to stand closure and reduced understory light, and eventually affected the regeneration of C. paliurus populations. There were more plant species in the shrub layers, and their distribution was more uniform, but the herb layers (mainly ferns) took up less space. From the viewpoint of the natural generation, properly opening forest gaps would be helpful to promote the growth and uniform distribution of C. paliurus seedlings in the forest in order to complete the natural regeneration of the population, and develop a stable community.

Key words: Cyclocarya paliurus, community structure, population regeneration, species diversity, diameter structure

CLC Number:

S718

ZHOU Yongsheng, XU Ziheng, YUAN Fayin, SHANG Xulan, SUN Caoweng, FANG Shengzuo. Comparisons of community characteristics among three natural forests of Cyclocarya paliurus in the subtropical region of China[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2021, 45(1): 29-35.

Figures/Tables 6

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Fig.1

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群落(代号) community (code)	地理位置 location geographica	年均气温/ ℃ annual temperature	年均降雨量/ mm annual rainfall	年日照/h sunshine hours	海拔/m altitude	土壤类型 soil types	平均郁闭度 canopy densities	干扰程度 degrees of interference
四川沐川(M)	103°47'27″E,28°58'01″N	15.86	1 168	965	1 212	山地黄棕壤	0.90	一般
广西金钟山 (J)	104°57'02″E,24°37'02″N	15.49	1 580	1 308	1 728	灰化黄壤	0.85	弱
湖北鹤峰(H)	109°58'39″E,30°00'56″N	11.27	1 499	1 342	1 221	山地黄棕壤	0.75	较强

群落号 community code	含5个种以上 more than five species			占总数比/% proportion in total
群落号 community code	科 family	属数 genus amount	种数 species amount	科 family	属 genus	种 species
M	山茶科Theaceae	6	12	12.5	32.0	44.3
	樟科Lauraceae	5	8
	壳斗科Fagaceae	4	6
	冬青科Aquifoliaceae	1	5
J	壳斗科Fagaceae	5	10	10.0	27.5	38.5
	樟科Lauraceae	5	8
	山茶科Theaceae	4	7
	蔷薇科Rosaceae	4	7
	百合科Liliaceae	4	5
H	蔷薇科Rosaceae	8	11	8.5	21.8	31.0
	樟科Lauraceae	5	10
	壳斗科Fagaceae	4	7
	山茶科Theaceae	4	6
	槭树科Aceraceae	1	5

序号 No.	分布区类型 area-types	属数(占比/%)amount of genus(proportion/%)
序号 No.	分布区类型 area-types	M	J	H
1	世界分布Cosmopolitan	2(4.08)	4(5.26)	5(5.43)
2	泛热带分布Pantropic	10(20.41)	15(19.74)	17(18.48)
3	热带美洲和热带亚洲间断分布Tropical Asia and Tropical America disjuncted	6(12.24)	5(6.58)	7(7.61)
4	旧世界热带分布Old World Tropic	2(4.08)	4(5.26)	2(2.17)
5	热带亚洲至热带大洋洲分布Tropical Asia to Tropical Australia	2(4.08)	3(3.95)	2(2.17)
6	热带亚洲至热带非洲分布Tropical Asia to Tropical Africa	1(2.04)	1(1.32)	1(1.09)
7	热带亚洲分布Tropical Asia	9(18.37)	10(13.16)	6(6.52)
8	北温带分布North Temperate	5(10.20)	16(20.05)	16(17.39)
9	东亚和北美洲间断分布East Asia and North America disjuncted	5(10.20)	7(9.21)	9(9.38)
10	旧世界温带分布Old World Temperate	1(2.04)	1(1.32)	3(3.26)
11	温带亚洲分布Temperate Asia	0	1(1.32)	0
12	地中海区、西亚至中亚分布Mediterranean,West Asia to Central Asia	0	1(1.32)	1(1.09)
13	中亚分布Central Asia	0	0	0
14	东亚分布East Asia	3(6.12)	7(9.21)	21(22.83)
15	中国特有分布Endemic to China	3(6.12)	1(1.32)	2(2.17)
	合计total	49(100.00)	76(100.00)	92(100.00)

层次 layer	群落号 community code	物种丰富度 species richness	Simpson 指数 Simpson index	Shannon- Wiener指数 Shannon- Wiener index	Pielou均匀度指数 Pielou evenness index
乔木层 tree layer	M	47	0.931	2.994	0.778
	J	60	0.933	3.213	0.785
	H	62	0.943	3.386	0.803
灌木层 shrub layer	M	41	0.959	3.455	0.930
	J	45	0.966	3.593	0.944
	H	72	0.992	4.538	0.992
草本层 herb layer	M	7	0.764	1.699	0.873
	J	17	0.925	2.705	0.955
	H	16	0.923	2.612	0.938

群落号 community code	科 family			属 genus			种 species
群落号 community code	共有科 common	总科数 total	相似性 comparability	共有属 common	总属数 total	相似性 comparability	共有种 common	总种数 total	相似性 comparability
M与J	23	82	0.561	31	129	0.481	32	166	0.386
M与H	25	91	0.549	28	150	0.373	34	196	0.347
J与H	36	109	0.661	39	179	0.436	31	222	0.279

Comparisons of community characteristics among three natural forests of Cyclocarya paliurus in the subtropical region of China

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