Chin J Plan Ecolo ›› 2018, Vol. 42 ›› Issue (9): 938-945.doi: 10.17521/cjpe.2018.0055

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Community characteristics and population structure of Ferrocalamus strictus, a rare species in Mojiang, Yunnan, China

YU Ding-Xiang,DU Fan(),SHI Ming,YANG Cong,DAI Jun   

  1. College of Forestry, Southwest Forestry University, Kunming 650224, China
  • Received:2018-03-07 Revised:2018-09-10 Online:2018-09-26 Published:2018-09-20
  • Contact: Fan DU E-mail:kmdufan@163.com

Abstract:

Aims As an endangered wild species with extremely small populations, Ferrocalamus strictusis narrowly distributed in South Yunnan with a small number of individuals. The survey of population structure and community characteristics of the wild population of F. strictus can facilitate understanding its endangered system and mechanisms and provide preliminary research basis for its protection.

Methods We investigated the community and population structure of F. strictus, including species composition, population density, population survivorship curve and death factors by plot surveying and sampling.

Important findings The community in which population of F. strictus is located in Mojiang has some characteristics of mountain rainforests in terms of appearance and species composition. The population density of F. strictus was 2.04 ind.·m -2. The survivorship curve of F. strictus was between Deevey-I and Deevey-II. The net proliferation rate (R0) of F. strictus population was 1.10, which indicates an expanding population of F. strictus. The death of F. strictusis caused by human logging, natural death, shoot degradation and insects feeding. Among them, artificial cutting accounts for the largest proportion. Ferrocalamus strictus is a species of forest bamboos distributed in the South Asian subtropics, which is a medium-sized bamboo species. Its internode length change suddenly from the base 3-4 nodes. The longest ones exceed 1 m, which ranks at the top of all bamboo species and is closely related to its adaptation to the tropical mountain rainforest environment.

Key words: Ferrocalamus strictus, species composition, population size, internode characteristic, Mojiang

Table 1

Species composition of the community in which population of Ferrocalamus strictus is located"

物种 Species 相对优势度
Relative dominance
相对多度
Relative abundance
相对频度
Relative frequency
重要值
Important value
物种 Species 相对优势度
Relative dominance
相对多度
Relative abundance
相对频度
Relative frequency
重要值
Important value
铁竹 Ferrocalamus strictus 48.41 98.27 2.78 49.82 尖子木 Oxyspora paniculata 0.30 0.01 1.85 0.72
绒毛肉实树
Sarcosperma kachinense
11.53 0.09 2.78 22.19 毛狗骨柴
Diplospora fruticosa
0.30 0.01 1.85 0.72
西南木荷
Schima wallichii
6.45 0.05 2.78 3.80 云南瓦理棕
Wallichia mooreana
0.46 0.02 0.93 0.47
胡椒 Piper nigrum 6.92 0.23 2.78 3.31 露兜树 Pandanus tectorius 0.46 0.01 0.93 0.47
黄花胡椒
Piper flaviflorum
4.38 0.15 2.78 2.44 云南斑籽木
Baliospermum calycinum
0.46 0.01 0.93 0.47
岭罗麦 Tarennoidea wallichii 0.92 0.02 2.78 2.33 山姜 Alpinia japonica 0.46 0.01 0.93 0.47
尼泊尔水东哥
Saurauia napaulensis
1.84 0.01 0.93 2.23 云南叶轮木
Ostodes katharinae
0.23 0.01 0.93 0.39
桂木 Artocarpus
nitidus subsp. lingnanensis
1.15 0.02 2.78 2.16 三对节
Clerodendrum serratum
0.23 0.01 0.93 0.39
纸叶琼楠
Beilschmiedia pergamentacea
0.69 0.02 2.78 2.00 亮叶龙船花
Ixora fulgens
0.23 0.01 0.93 0.39
钝叶桂
Cinnamomum bejolghota
0.69 0.02 2.78 1.72 玉兰叶木姜子
Litsea magnoliifolia
0.23 0.01 0.93 0.39
罗伞
Brassaiopsis glomerulata
0.69 0.02 2.78 1.59 楤木
Aralia chinensis
0.23 0.01 0.93 0.39
云桂暗罗 Polyalthia petelotii 0.69 0.02 2.78 1.48 大果榕 Ficus auriculata 0.23 0.01 0.93 0.39
地不容
Stephania epigaea
0.92 0.05 2.78 1.25 散生女贞
Ligustrum confusum
0.23 0.01 0.93 0.39
潺槁木姜子 Litsea glutinosa 0.69 0.02 2.78 1.24 西南山茶 Camellia pitardii 0.23 0.01 0.93 0.39
四角蒲桃
Syzygium tetragonum
0.69 0.01 1.85 1.24 滇南赤车
Pellionia paucidentata
0.23 0.01 0.93 0.39
石韦
Pyrrosia lingua
0.69 0.07 2.78 1.18 大叶仙茅
Curculigo capitulata
0.23 0.01 0.93 0.39
石柑子 Pothos chinensis 0.69 0.06 2.78 1.18 金毛狗蕨 Cibotium barometz 0.23 0.01 0.93 0.39
蛇根草 Ophiorrhiza mungos 0.69 0.05 2.78 1.17 鸭跖草 Commelina communis 0.23 0.01 0.93 0.39
紫金牛
Ardisia japonica
0.69 0.03 2.78 1.17 花蘑芋
Amorphophallus konjac
0.23 0.01 0.93 0.39
三叶崖爬藤
Tetrastigma hemsleyanum
0.53 0.04 2.78 1.12 爬树龙
Rhaphidophora decursiva
0.18 0.02 0.93 0.38
铁角蕨
Asplenium trichomanes
0.41 0.15 2.78 1.11 巴豆藤
Craspedolobium schochii
0.12 0.01 0.93 0.35
匍匐堇菜
Viola pilosa
0.53 0.03 2.78 1.11 密花豆
Spatholobus suberectus
0.05 0.01 0.93 0.33
莎草一种
Cyperus sp.
0.30 0.04 2.78 1.04 桂叶素馨
Jasminum laurifolium
0.02 0.03 0.93 0.33
肉实树
Sarcosperma laurinum
0.69 0.01 0.93 1.04 带叶卷瓣兰
Bulbophyllum taeniophyllum
0.02 0.03 0.93 0.33
瓦韦
Lepisorus thunbergianus
0.46 0.11 1.85 0.81 水晶兰
Monotropa uniflora
0.02 0.01 0.93 0.32
乌毛蕨 Blechnum orientale 0.46 0.03 1.85 0.78 毛柱马钱 Strychnos nitida 0.02 0.01 0.93 0.32
小绿刺 Capparis urophylla 0.46 0.01 1.85 0.78 买麻藤 Gnetum montanum 0.02 0.01 0.93 0.32
九节 Psychotria asiatica 0.46 0.01 1.85 0.78 薯蓣 Dioscorea polystachya 0.02 0.01 0.93 0.32
三桠苦
Evodia lepta
0.30 0.06 1.85 0.74 独子藤
Celastrus monospermus
0.02 0.01 0.93 0.32

Table 2

Population density of Ferrocalamus strictus"

样地
Plot
总数
Total (ind.)
面积
Area (m2)
种群密度
Population density (ind.·m-2)
1 14 400 6 580 2.20
2 350 430 0.81
3 120 260 0.46
Total 14 870 7 270 2.04

Table 3

Time-specific life table of the Ferrocalamus strictus population"

x ax nx dx qx Lx Tx ex
1 84 1 000 143 14.30 928.50 3 040.50 3.04
2 72 857 36 4.20 839.00 2 112.00 2.46
3 69 821 214 26.07 714.00 1 273.00 1.55
4 51 607 96 15.82 559.00 559.00 0.92
5 43 511

Fig. 1

Survivorship curve of the Ferrocalamus strictus population."

Table 4

Fecundity schedule of the Ferrocalamus strictus population"

x lx bx lxbx xlxbx
1 1.00 0.00 0.00 0.00
2 0.86 0.41 0.35 0.71
3 0.82 0.88 0.72 2.17
4 0.61 0.04 0.02 0.10
5 0.51 0.00 0.00 0.00
R0 = 1.10
rm = 0.04
T = 2.71
t = 19.70

Fig. 2

Death rate of Ferrocalamus strictus"

Fig. 3

Internode growth curve of Ferrocalamus strictus."

Fig. 4

Rhizomes (A), leaf sheaths (B), a similar phenomenon with caespitose of clum (C) and internode length at the base (D) of Ferrocalamus strictus."

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