Competition status and conservation suggestions for Wild Plant with Extremely Small Populations in primary communities in Hubei Province

doi:10.17520/biods.2021517

Abstract

Abstract:

Aims: Wild Plant with Extremely Small Populations (WPESP) are plant species that are primarily at the risk of extinction and require urgent protection. It is of great practical significance to protect and recover WPESP through researching species importance value (IV) and competition patterns.
Methods: Based on the extensive field survey, we analyzed the species importance value and improved Hegyi competition index of the seven WPESP in Hubei Province, including: Pinus fenzeliana var. dabeshanensis, Metasequoia glyptostroboides, Michelia wilsonii, Berchemiella wilsonii, Sinojackia dolichocarpa, S. huangmeiensis and Acer miaotaiense.
Results: The results of the importance value indicated that M. glyptostroboides and S. dolichocarpa were the dominant species in the natural communities with a high importance value and a low variable coefficient in their respective communities, S. huangmeiensis and A. miaotaiense were the sub-dominant species with a relatively higher importance value, and P. fenzeliana var. dabeshanensis, M. wilsonii and B. wilsonii were the accessory species in the community with a relatively low importance value. According to the improved Hegyi competition index, there are big differences in competition density and source of competition among seven WPESP in Hubei Province. Pinus fenzeliana var. dabeshanensis, M. wilsonii, B. wilsonii and S. huangmeiensis are primarily subject to interspecific competition while M. glyptostroboide, S. dolichocarpa and A. miaotaiense are primarily subjected to intraspecific competition.
Conclusion: The interspecific and intraspecific competitions of WPESP should be fully considered before implementing conservation measures so that more precise conservation measures can be taken.

Key words: Wild Plant with Extremely Small Populations, improved Hegyi competition index, conservation, importance value, competition, dominance

Zheming Sun, Yaheng Liu, Qiutong Peng, Zhiyan Xu, Yujing Yang, Wenhui Ou, Zhongqiang Li. Competition status and conservation suggestions for Wild Plant with Extremely Small Populations in primary communities in Hubei Province[J]. Biodiv Sci, 2022, 30(6): 21517.

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URL: https://www.biodiversity-science.net/EN/10.17520/biods.2021517

https://www.biodiversity-science.net/EN/Y2022/V30/I6/21517

Figures/Tables 4

References 33

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物种 Species	分布区域 Distribution area	保护等级 Protection level^*	IUCN评级 IUCN grade	RLCHP评级 RLCHP grade^**	现存数量 Survival number
大别山五针松 Pinus fenzeliana var. dabeshanensis	英山县 Yingshan County	I	VU	-	4
水杉 Metasequoia glyptostroboides	利川市 Lichuan City	I	EN	CR	5,630
峨眉含笑 Michelia wilsonii	利川市 Lichuan City	II	DD	VU	8
小勾儿茶 Berchemiella wilsonii	保康县、长阳县等 Baokang County, Changyang County, etc.	II	-	-	113
黄梅秤锤树 Sinojackia huangmeiensis	黄梅县 Huangmei County	II	VU	VU	462
长果秤锤树 Sinojackia dolichocarpa	秭归县 Zigui County	II	VU	EN	13
庙台槭 Acer miaotaiense	神农架林区 Shennongjia Forestry District	II	VU	VU	13

物种 Species	分布区域 Distribution area	保护等级 Protection level^*	IUCN评级 IUCN grade	RLCHP评级 RLCHP grade^**	现存数量 Survival number
大别山五针松 Pinus fenzeliana var. dabeshanensis	英山县 Yingshan County	I	VU	-	4
水杉 Metasequoia glyptostroboides	利川市 Lichuan City	I	EN	CR	5,630
峨眉含笑 Michelia wilsonii	利川市 Lichuan City	II	DD	VU	8
小勾儿茶 Berchemiella wilsonii	保康县、长阳县等 Baokang County, Changyang County, etc.	II	-	-	113
黄梅秤锤树 Sinojackia huangmeiensis	黄梅县 Huangmei County	II	VU	VU	462
长果秤锤树 Sinojackia dolichocarpa	秭归县 Zigui County	II	VU	EN	13
庙台槭 Acer miaotaiense	神农架林区 Shennongjia Forestry District	II	VU	VU	13

物种 Species	样方数 No. of samples	最大值 Max. value (%)	最小值 Min. value (%)	标准差 Standard deviation	平均值 Mean (%)	变异系数 Variation coefficient (%)
大别山五针松 Pinus fenzeliana var. dabeshanensis	4	21.10	8.45	5.10	15.56	32.77
水杉 Metasequoia glyptostroboides	10	81.26	21.54	19.36	51.82	37.37
峨眉含笑 Michelia wilsonii	5	17.45	9.58	2.65	14.09	18.79
小勾儿茶 Berchemiella wilsonii	2	10.55	7.61	1.47	9.08	16.19
黄梅秤锤树 Sinojackia huangmeiensis	10	72.96	10.98	18.42	33.16	55.54
长果秤锤树 Sinojackia dolichocarpa	7	91.88	46.69	13.64	66.77	20.43
庙台槭 Acer miaotaiense	4	70.99	8.51	24.82	36.03	68.89

物种 Species	样方数 No. of samples	最大值 Max. value (%)	最小值 Min. value (%)	标准差 Standard deviation	平均值 Mean (%)	变异系数 Variation coefficient (%)
大别山五针松 Pinus fenzeliana var. dabeshanensis	4	21.10	8.45	5.10	15.56	32.77
水杉 Metasequoia glyptostroboides	10	81.26	21.54	19.36	51.82	37.37
峨眉含笑 Michelia wilsonii	5	17.45	9.58	2.65	14.09	18.79
小勾儿茶 Berchemiella wilsonii	2	10.55	7.61	1.47	9.08	16.19
黄梅秤锤树 Sinojackia huangmeiensis	10	72.96	10.98	18.42	33.16	55.54
长果秤锤树 Sinojackia dolichocarpa	7	91.88	46.69	13.64	66.77	20.43
庙台槭 Acer miaotaiense	4	70.99	8.51	24.82	36.03	68.89

对象木 Objective tree	竞争木 Competitive tree	样方出现频率 Occurrence frequency (%)	株数 Individual number	竞争强度 Competition intensity
对象木 Objective tree	竞争木 Competitive tree	样方出现频率 Occurrence frequency (%)	株数 Individual number	最大值 Max.	最小值 Min.	竞争指数 Competition intensity	平均值 Mean	占总竞争指数百分比 % of total competition intensity	排名 Rank
大别山五针松 Pinus var. dabeshanensis	黄山松 Pinus taiwanensis	100.0	21	8.18	0.16	9.13	0.43	94.8	1
	山梅花 Philadelphus incanus	25.0	2	0.19	0.19	0.19	0.10	2.0	2
	紫茎 Stewartia sinensis	50.0	2	0.16	0.03	0.19	0.09	1.9	3
	金缕梅 Hamamelis mollis	25.0	1	0.08	0.08	0.08	0.08	0.9	4
	茅栗 Castanea seguinii	50.0	2	0.02	0.01	0.03	0.02	0.3	5
	其他伴生种 Other trees	-	1	0.01	0.01	0.01	0.01	0.1	-
水杉 Metasequoia glyptostroboides	水杉 M. glyptostroboides	90.0	33	3.27	0.20	10.58	0.32	80.9	1
	柳杉 Cryptomeria japonica var. sinensis	40.0	17	0.91	0.02	1.95	0.11	14.9	2
	毛竹 Phyllostachys edulis	10.0	9	0.27	0.27	0.27	0.03	2.0	3
	棕榈 Trachycarpus fortunei	20.0	3	0.25	0.01	0.26	0.09	2.0	4
	银杏 Ginkgo biloba	10.0	1	0.02	0.02	0.02	0.02	0.2	-
峨眉含笑 Michelia wilsonii	鸡爪槭 Acer palmatum	20.0	2	0.93	0.93	0.93	0.47	21.2	1
	北枳椇 Hovenia dulcis	20.0	3	0.46	0.46	0.46	0.15	10.4	2
	青冈 Cyclobalanopsis glauca	40.0	2	0.25	0.19	0.43	0.22	9.8	3
	长蕊杜鹃 Rhododendron stamineum	80.0	9	0.17	0.02	0.35	0.04	8.0	4
	鹅耳枥 Carpinus turczaninowii	20.0	2	0.33	0.33	0.33	0.17	7.6	5
	其他伴生种 Other trees	-	30	-	-	1.89	-	43.1	-
小勾儿茶 Berchemiella wilsonii	鹅耳枥 Carpinus turczaninowii	100.0	5	0.52	0.33	0.85	0.17	30.1	1
	湖北紫荆 Cercis glabra	100.0	6	0.19	0.16	0.34	0.06	12.1	2
	朴树 Celtis sinensis	50.0	3	0.33	0.33	0.33	0.11	11.7	3
	榔榆 Ulmus parvifolia	50.0	1	0.23	0.23	0.23	0.23	8.0	4
	化香树 Platycarya strobilacea	50.0	1	0.22	0.22	0.22	0.22	7.7	5
	其他伴生种 Other trees	-	16	-	-	0.86	-	30.5	-
黄梅秤锤树 Sinojackia huangmeiensis	麻栎 Quercus acutissima	50.0	15	33.76	4.14	75.72	5.05	51.8	1
	枸骨 Ilex cornuta	80.0	19	5.70	0.05	16.75	0.88	11.5	2
	枫香树 Liquidambar formosana	10.0	2	11.89	4.80	16.70	8.35	11.4	3
	樟 Cinnamomum camphora	30.0	6	7.26	0.54	8.65	1.44	5.9	4
	黄梅秤锤树 S. huangmeiensis	100.0	43	1.65	0.04	8.13	0.19	5.6	5
	其他伴生种 Other trees	-	28	-	-	20.34	-	13.9	-
长果秤锤树 Sinojackia dolichocarpa	长果秤锤树 S. dolichocarpa	100.0	13	1.48	0.17	5.68	0.25	66.0	1
	青冈 Cyclobalanopsis glauca	42.9	3	0.44	0.24	1.08	0.36	12.5	2
	侧柏 Platycladus orientalis	14.3	1	0.61	0.61	0.61	0.61	7.1	3
	杨梅叶蚊母树 Distylium myricoides	42.9	9	0.26	0.15	0.60	0.07	7.0	4
	朴树 Celtis sinensis	57.1	4	0.14	0.09	0.45	0.11	5.3	5
	其他伴生种 Other trees	-	3	-	-	0.18	-	2.1	-
庙台槭 Acer miaotaiense	庙台槭 A. miaotaiense	75.0	13	6.55	0.47	9.81	0.75	66.2	1
	苦树 Picrasma quassioides	25.0	8	1.94	1.94	1.94	0.24	13.1	2
	枫杨 Pterocarya stenoptera	25.0	2	0.81	0.81	0.81	0.40	5.4	3
	房县槭 A. sterculiaceum subsp. franchetii	25.0	4	0.53	0.53	0.53	0.13	3.6	4
	盐肤木 Rhus chinensis	25.0	3	0.32	0.32	0.32	0.11	2.2	5
	其他伴生种 Other trees	-	12	-	-	2.39	-	9.6	-