Species diversity changes of Platycladus orientalis community at different succession stages in Xuzhou City

doi:10.12302/j.issn.1000-2006.202301003

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2025, Vol. 49 ›› Issue (1): 171-178.doi: 10.12302/j.issn.1000-2006.202301003

Species diversity changes of Platycladus orientalis community at different succession stages in Xuzhou City

SUI Xiran¹(), LI Jun², CHEN Juan², HUA Jun², SHEN Qian², YANG Hongsheng², HE Qiancheng², LI You², WANG Wei², PENG Ye³, GE Zhiwin⁴, ZHANG Zengxin¹^,^*()

1. Co-Innovation Center for Sustainable Forestry in Southern China,College of Forestry and Grassland, College of Soil and Water Conservation,Nanjing Forestry University,Nanjing 210037,China
2. Xuzhou Yunlong Lake Scenic Area Management Committee, Xuzhou 221018,China
3. College of Life Science, Nanjing Foresty University, Nanjing 210037, China
4. College of Ecology and Environment,Nanjing Forestry University,Nanjing 210037,China

Received:2023-01-03 Revised:2023-11-10 Online:2025-01-30 Published:2025-01-21
Contact: ZHANG Zengxin E-mail:sxr1554086@163.com;nfuzhang@163.com

Abstract

Abstract:

【Objective】This study explored the composition and diversity of plant communities at different succession stages of Platycladus orientalis in typical limestone mountainous areas of Xuzhou City, and revealed changes in species substitution and community structure.【Method】The community characteristics and influencing factors of P. orientalis in four different succession stages: shrub grassland, coniferous forest, coniferous-broadleaf mixed forest, and broadleaf forest were analyzed using a space-for-time substitution method and typical sample plot surveys. 【Result】 (1) A total of 105 plant species across the sample plots, representing 58 families and 96 genera. Species diversity across succession stages included: 14 families, 18 genera, and 20 species in shrub grasslands; 33 families, 49 genera, and 51 species in coniferous forests; 43 families, 59 genera, and 64 species in coniferous-broadleaf mixed forests; and 27 families, 44 genera, and 45 species in broadleaf forests. (2) Regarding importance values of plant species in different succession stages, P. orientalis consistently ranked first in the tree layer, while Broussonetia papyrifera ranked first in the shrub layer, showing a pattern of initial decline followed by an increase. In the herbaceous layer, the species with the highest importance values across the four succession stages were Aristolochia debilis, Rubus parvifolius, Solanum lyratum, and Hedera nepalensis. (3) The Shannon-Wiener diversity index, Margalef richness index, Pielou evenness index, and Simpson dominance index of community followed a similar trend, initially increasing and then decreasing as succession progressed. The diversity index peaked in the coniferous-broadleaf mixed forest stage. (4) The correlation analysis between plant diversity indices and environmental factors indicated that species diversity changes during the succession of P. orientalis forests in Xuzhou’s limestone mountains were significantly correlated with canopy density, slope position, and slope aspect, with canopy density having the greatest influence on the Shannon-Wiener diversity index (P< 0.05). 【Conclusion】 The plant diversity in P. orientalis forests in Xuzhou’s limestone mountainous area peaked during the coniferous-broadleaf mixed forest stage. The study identified canopy closure, slope position, and slope orientation as key factors influencing plant diversity. These findings provide theoretical bases for the transformation and management of near-natural forest stands in the region.

Key words: limestone hill region of Xuzhou, Platycladus orientalis plantation, plant community, community succession, plant diversity, forest improvement

CLC Number:

S718.5

SUI Xiran, LI Jun, CHEN Juan, HUA Jun, SHEN Qian, YANG Hongsheng, HE Qiancheng, LI You, WANG Wei, PENG Ye, GE Zhiwin, ZHANG Zengxin. Species diversity changes of Platycladus orientalis community at different succession stages in Xuzhou City[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2025, 49(1): 171-178.

Figures/Tables 6

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演替阶段 succession stage	植被型 vegetation type	植被亚型 vegetation subtype	植物群落 plant community	物种组成 species composition
灌草丛shrubs and grasses	落叶阔叶灌丛	暖性落叶阔叶灌丛	石灰岩山地落叶阔叶灌丛	14科18属20种
针叶林coniferous forest	温性针叶林	温性常绿针叶林	侧柏林	33科49属51种
			雪松林
针阔混交林 coniferous broad- leaved mixed forest	次生针阔叶混交林	东部地区次生针阔叶混交林	侧柏-构树	43科59属64种
			侧柏-构树-栾树
			侧柏-柘树-枣树
			侧柏-构树-柘树
			侧柏-枣树
			侧柏-构树-女贞
			侧柏-桑树
阔叶林 broad-leaved forest	温性常绿阔叶林	典型落叶阔叶林	构树林	27科44属45种
			刺槐林
	竹林(混生于各类常绿阔叶林中)^[14]		暖性竹林	丘陵竹林

演替阶段 succession stage	多样性指数 diversity index	环境因子 environment factor
演替阶段 succession stage	多样性指数 diversity index	海拔 elevation	坡向 aspect	坡度 slope	坡位 position	郁闭度 canopy
灌草丛阶段GC	Shannon-Wiener	0.659	0.159	0.119	0.398	-0.778^*
	Margalef	0.522	-0.182	-0.113	0.479	-0.562
	Pielou	-0.302	-0.044	-0.316	-0.606	-0.538
	Simpson	0.818^*	0.494	0.471	0.482	-0.825^*
针叶林阶段CF	Shannon-Wiener	0.248	0.326	0.120	0.310	-0.392
	Margalef	0.257	0.280	-0.078	0.504	-0.726^*
	Pielou	-0.748^*	-0.259	-0.675^*	-0.426	-0.160
	Simpson	-0.036	0.091	0.030	0.196	-0.326
针阔混交林阶段CB	Shannon-Wiener	0.177	0.681^*	-0.015	0.674^*	-0.746^*
	Margalef	0.509	0.465	0.396	0.246	0.299
	Pielou	-0.523	0.645	0.400	0.053	0.055
	Simpson	0.215	0.418	0.033	0.808^**	-0.858^**
阔叶林阶段BF	Shannon-Wiener	0.171	0.688^*	0.272	-0.086	0.444
	Margalef	-0.227	-0.405	-0.097	0.269	-0.503
	Pielou	0.244	0.641	0.461	0.190	-0.088
	Simpson	-0.733^*	-0.622	-0.293	-0.274	0.524

Species diversity changes of Platycladus orientalis community at different succession stages in Xuzhou City

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