Phyto-community Characteristics of the Dependent Environment of Dipteris shenzhenensis

doi:10.7525/j.issn.1673-5102.2024.01.006

Abstract

Abstract:

Dipteris shenzhenensis is a critically endangered（CR） plant distributed only in Shenzhen. The phyto-community analysis of this dominant community was studied and analyzed， and the results showed that： there were 85 species， 73 genera and 49 families of vascular plants in Dipteris shenzhenensis community， the dominant species included Gordonia axillaris， Ilex memecylifolia， Cyclobalanopsis neglecta， Enkianthus quinqueflorus， Litsea rotundifolia var. oblongifolia， Dipteris shenzhenensis， Dicranopteris pedata；Plant individuals in this community decreased with the increase of tree height， showing an “Inverted J” type distribution， which was an obvious characteristic in subtropical areas. The diversity and evenness index of all life forms showed a trend of “high in the middle and low in the two ends”； The T test of the species diversity index of different communities in the same area proved that there was no significant difference in diversity level between different communities， which belonged to the stable stage of ecological succession； Niche analysis revealed the survival status of Dipteris shenzhenensis in the community， indicating that this species was not widespread， demanding for environment and poor competitiveness in resources， and there was a risk of extinction during community succession； Interspecific association analysis revealed the interspecific relationship between this species and other dominant herbs， and identified possible complementary and competitive plants.

Key words: Dipteris shenzhenensis, species diversity, community structure, community succession, niche

CLC Number:

S718.54

Yuqi MA, Yuhui LI, Lin LIN, Yue SHEN, Yufeng GU, Faguo WANG. Phyto-community Characteristics of the Dependent Environment of Dipteris shenzhenensis[J]. Bulletin of Botanical Research, 2024, 44(1): 34-44.

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种 Species	相对多度 Relative abundance/%	相对频度 Relative frequency/%	相对显著度 Relative significance/%	重要值 Important value/%
其他5种之和Sum of other five species	6.122 4	9.090 9	3.061 0	6.091 4
大头茶 Gordonia axillaris	29.932 0	9.090 9	35.239 0	24.754 0
谷木叶冬青 Ilex memecylifolia	18.367 3	9.090 9	14.694 3	14.050 8
竹叶青冈 Cyclobalanopsis neglecta	14.285 7	3.409 1	23.921 2	13.872 0
鼠刺 Itea chinensis	6.122 4	7.954 5	4.375 4	6.150 8
软荚红豆 Ormosia semicastrata	6.802 7	1.136 4	5.095 5	4.344 9
豺皮樟 Litsea rotundifolia var. oblongifolia	2.040 8	7.954 5	1.453 2	3.816 2
岭南山竹子 Garcinia oblongifolia	2.040 8	5.681 8	1.868 5	3.197 0
粘木 Ixonanthes chinensis	2.721 1	3.409 1	3.396 6	3.175 6
亮叶柃 Eurya nitida	2.040 8	5.681 8	1.516 0	3.079 5
五列木 Pentaphylax euryoides	2.721 1	4.545 5	1.787 5	3.018 0
吊钟花 Enkianthus quinqueflorus	0.680 3	7.954 5	0.312 9	2.982 6
光叶山矾 Symplocos lancifolia	1.360 5	5.681 8	1.005 2	2.682 5
密花树 Myrsine seguinii	1.360 5	5.681 8	0.773 0	2.605 1
降真香 Acronychia pedunculata	2.040 8	4.545 5	0.887 1	2.491 1
酸味子 Antidesma japonicum	0.680 3	4.545 5	0.376 4	1.867 4
岗松 Baeckea frutescens	0.680 5	4.545 5	0.237 2	1.821 1

种 Species	相对多度 Relative abundance/%	相对频度 Relative frequency/%	相对盖度 Relative coverage/%	重要值 Important value/%
其他30种之和Sum of other 30 species	14.716 9	39.263 5	11.492 6	21.824 3
谷木叶冬青 Ilex memecylifolia	4.150 9	4.908 0	24.418 9	11.159 3
大头茶 Gordonia axillaris	5.660 4	4.908 0	9.692 8	6.753 7
吊钟花 Enkianthus quinqueflorus	6.226 4	4.294 5	7.303 0	5.941 3
豺皮樟 Litsea rotundifolia var. oblongifolia	3.773 6	4.294 5	8.957 4	5.675 2
鼠刺 Itea chinensis	5.094 3	4.294 5	6.174 0	5.187 6
降真香 Acronychia pedunculata	2.075 5	2.454 0	10.208 7	4.912 7
狗骨柴 Diplospora dubia	9.056 6	3.067 5	1.118 3	4.414 1
越南叶下珠 Phyllanthus cochinchinensis	10.188 7	2.454 0	0.248 1	4.296 9
桃金娘 Rhodomyrtus tomentosa	6.415 1	4.294 5	1.374 4	4.028 0
粗叶木 Lasianthus chinensis	4.150 9	4.908 0	1.879 1	3.646 0
竹叶青冈 Cyclobalanopsis neglecta	6.415 1	1.840 5	1.682 2	3.312 6
岗松 Baeckea frutescens	4.528 3	2.454 0	2.840 5	3.274 3
春花木 Rhaphiolepis indica	2.075 5	1.840 5	4.660 2	2.858 7
五列木 Pentaphylax euryoides	2.075 5	2.454 0	3.712 4	2.747 3
软荚红豆 Ormosia semicastrata	6.792 5	0.613 5	0.726 0	2.710 7
岭南山竹子 Garcinia oblongifolia	0.754 7	3.067 5	1.751 0	1.857 7
密花树 Myrsine seguinii	1.698 1	3.067 5	0.730 2	1.831 9
栀子 Gardenia jasminoides	1.886 8	3.067 5	0.533 0	1.829 1
百两金 Ardisia crispa	2.264 2	2.454 0	0.497 2	1.738 5

种 Species	相对多度 Relative abundance/%	相对频度 Relative frequency/%	相对盖度 Relative coverage/%	重要值 Important value/%
其他20种之和Sum of other 20 species	11.111 1	35.365 9	6.430 1	17.635 7
深圳双扇蕨 Dipteris shenzhenensis	37.673 6	6.097 6	15.147 3	19.639 5
芒萁 Dicranopteris pedata	1.562 5	8.536 6	44.862 4	18.320 5
鳞籽莎 Lepidosperma chinense	14.756 9	2.439 0	3.547 0	6.914 3
乌毛蕨 Blechnum orientale	9.027 8	7.317 1	3.659 4	6.668 1
粤里白 Diplopterygium cantonense	2.430 6	2.439 0	10.990 8	5.286 8
土茯苓 Smilax glabra	5.034 7	6.097 6	0.774 4	3.968 9
罗浮买麻藤 Gnetum luofuense	1.215 3	7.317 1	2.797 7	3.776 7
扇叶铁线蕨 Adiantum flabellulatum	3.819 4	3.658 5	2.426 6	3.301 5
黑莎草 Gahnia tristis	3.125 0	4.878 0	1.024 1	3.009 0
铁芒萁 Dicranopteris linearis	3.645 8	1.219 5	3.746 9	2.870 7
小叶红叶藤 Rourea microphylla	0.868 1	6.097 6	0.449 6	2.471 8
石松 Lycopodium japonicum	2.256 9	2.439 0	2.585 3	2.427 1
寄生藤 Dendrotrophe varians	0.868 1	3.658 5	1.423 8	1.983 5
团叶陵齿蕨 Lindsaea orbiculata	2.604 2	2.439 0	0.134 6	1.725 9

群落 Community	生活型 Life form	总种数量 Total Species	Margalef指数 Margalef Index	Simpson指数 Simpson Index	Shannon-Wienner指数 Shannon-Wienner Index	Pielou指数 Pielou Index
深圳双扇蕨群落（本研究） Dipteris shenzhenensis community	乔木层Tree layer	21	4.007 7	0.843 4	2.301 0	0.755 8
	灌木层Shrub layer	49	7.652 0	0.948 3	3.253 2	0.840 4
	草本层Herbaceous layer	34	5.191 9	0.858 3	2.379 3	0.680 5
	整体值Whole value	85	6.214 6	0.945 7	3.528 4	0.494 6
血桐群落^［20］ Macaranga tanarius community	乔木层Tree layer	12	3.496 5	0.804 9	1.916 4	0.548 1
	灌木层Shrub layer	44	5.934 9	0.923 2	2.999 5	0.504 5
	草本层Herbaceous layer	12	4.912 7	0.712 5	1.674 2	0.340 8
	整体值Whole value	68	6.304 4	0.945 0	3.375 4	0.535 4
团叶陵齿蕨群落^［20］ Lindsaea orbiculata community	乔木层Tree layer	26	4.718 4	0.909 4	2.738 4	0.580 4
	灌木层Shrub layer	59	6.405 2	0.948 8	3.314 8	0.517 5
	草本层Herbaceous layer	15	5.793 0	0.834 0	2.196 1	0.379 1
	整体值Whole value	100	6.951 7	0.965 5	3.821 3	0.549 7

物种 Species	Levins指数 B_CL，_i
H1	0.757 6
H2	0.276 8
H3	0.221 1
H4	0.213 0
H5	0.212 1
H6	0.203 4
H7	0.197 2
H8	0.142 0
H9	0.108 6
H10	0.106 0
H11	0.104 8