三江源区高寒草甸43种植物繁殖体质量和形状的比较
A comparative study on diaspore quality and shape of 43 plant species at the alpine meadow in the source region of three rivers
查看参考文献29篇
文摘
|
[目的]对三江源区高寒草甸43种植物繁殖体的质量和形状进行比较,初步探讨研究区植物繁殖体的生存对策,为退化草地恢复治理和生物多样性保护提供理论依据.[方法]采集三江源区高寒草甸43种植物的繁殖体(13种为种子,30种为果实),称质量,用繁殖体三维(长、宽、高)的方差衡量繁殖体形状,并分析繁殖体质量、形状与植物物种生态特征的相关性.[结果]有15种植物繁殖体的单粒质量小于1 mg并接近圆球形(平均方差<0.09),其可能具有持久土壤种子库;多年生草本植物繁殖体的质量较1年或1/2年生草本植物大,形状较其扁且长;优良牧草与杂草繁殖体的质量和形状均有差异,杂草繁殖体单粒质量大,而牧草的繁殖体更扁、长;种子形状的平均方差较果实的小,但质量无明显差异;禾本科、菊科、莎草科植物多有扁平或细长繁殖体(平均方差>0.09),而质量无明显差异;繁殖体附属物在植物的传播和定居方面具有重要作用,其中75%的菊科植物具有冠毛,易于被风传播,89%的禾本科植物具芒,被风传播的概率小.[结论]植物物种的扩散和定居与繁殖体的质量和形状密切相关. |
其他语种文摘
|
[Objective]The paper studied the quality and shape of the diaspores of 43 plant species involving 13 seeds and 30 fruits from alpine meadow in the source region of three rivers.[Method]The diaspores of 43 species were quantified,shapes of them were scaled with variance of three dimensions,and the relations between above indexes and ecological characteristics of diaspores were analyzed.[Result]The results show that the quality of a single diaspore of 15 species is less than 1 mg,and its shape is close to sphericity because of variance less than 0.09,and it might have persistent soil seed bank,and is able to adapt to disturbance. The diaspores of perennials are heavier,flatter and longer than those of annuals. The diaspores of forb are heavier,and those of herbages are flatter and longer. Seeds are closer to sphericity in comparison with fruits. The diaspores of most of Compositae and Gramineae and Sedges species are flat and elongated because the variance is more than 0.09. The appendages of diaspores play an important role in dispersal and establishment. The diaspores of 75% Compositae species have pappuses, and might be dispersed by wind easily.And the diaspores of 89% Gramineae species have awns which make them not likely to be dispersed. [Conclusion]The quality and shape of the diaspores of 43 species are different, which affect the survival strategy of species to a great extent. |
来源
|
西北农林科技大学学报. 自然科学版
,2009,37(8):195-203 【核心库】
|
关键词
|
高寒草甸
;
繁殖体质量
;
繁殖体形状
;
生存对策
;
三江源区
|
地址
|
1.
青海师范大学,生命与地理科学学院, 青海, 西宁, 810008
2.
中国科学院,西北高原生物研究所, 中国科学院高原生物适应与进化重点实验室, 青海, 西宁, 810001
|
语种
|
中文 |
文献类型
|
研究性论文 |
ISSN
|
1671-9387 |
学科
|
植物学 |
基金
|
国家自然科学基金
;
国家973计划
;
中国科学院知识创新工程项目
;
中国科学院知识创新工程西部行动计划项目
|
文献收藏号
|
CSCD:3711003
|
参考文献 共
29
共2页
|
1.
刘志民. 植物生活史繁殖对策与干扰关系的研究.
应用生态学报,2003,14(3):418-422
|
被引
102
次
|
|
|
|
2.
Thompson K. Seed and seed banks.
New Phytologists,1987,106:23-34
|
被引
37
次
|
|
|
|
3.
Thompson K. Seed size and shape predict persistence in soil.
Functional Ecology,1993,7:236-241
|
被引
90
次
|
|
|
|
4.
Weiher E. Challenging Theophrastus:acommon core list of plant traits for functional ecology.
Journal of Vegetation Science,1999,10:609-620
|
被引
59
次
|
|
|
|
5.
Lloret F. Seedling surviva of Mediterranean shrubland species in relation to root:shoot ratio,seed size and water and nitrogen use.
Functional Ecology,1999,13:210-216
|
被引
52
次
|
|
|
|
6.
Guo Q. Constrains of seed size on plant distribution and abundance.
ECOLOGY,2000,81:2149-2155
|
被引
21
次
|
|
|
|
7.
Moles A T. Seed size and shape and persistence in the soil in the New Zealand flora.
OIKOS,2000,89:541-545
|
被引
33
次
|
|
|
|
8.
仲延凯. 割草干扰对典型草原土壤种子库种子数量与组成的影响──Ⅲ 120种植物种子的大小与重量.
内蒙古大学学报:自然科学版,2001,32(3):280-286
|
被引
18
次
|
|
|
|
9.
闫巧玲. 科尔沁沙地78种植物繁殖体重量和形状比较.
生态学报,2004,24(11):2422-2429
|
被引
14
次
|
|
|
|
10.
黄振英. 沙鞭(禾本科)种子在沙丘上的萌发策略及幼苗的耐干燥特性.
生态学报,2005,25(2):298-303
|
被引
13
次
|
|
|
|
11.
Huang Z Y. Comparison of germination strategies of Artemisia ordosica with its two congeners from desert of China and Israel.
ACTA BOTANICA SINICA,2000,42(1):71-80
|
被引
36
次
|
|
|
|
12.
赵新全. 三江源区生态环境退化、恢复治理及其可持续发展.
中国科学院院刊,2005,20(6):471-476
|
被引
55
次
|
|
|
|
13.
邓自发. 高寒草甸藏嵩草种群繁殖对策的研究.
应用与环境生物学报,2001,7(4):332-334
|
被引
23
次
|
|
|
|
14.
周华坤. 高山草甸垂穗披碱草人工草地群落特征及稳定性研究.
中国草地学报,2007,29(2):13-25
|
被引
43
次
|
|
|
|
15.
中国科学院西北高原生物研究所青海植物志编辑委员会.
青海植物志,1997
|
被引
2
次
|
|
|
|
16.
Funes G. Seed size and shape are good predictors of seed persistence in soil in temperatemountain grasslands of Argentina.
Seed Science Research,1999,9(4):341-345
|
被引
17
次
|
|
|
|
17.
Leishman M R. Seed size and shape are not related to persistence in soil in Australia in the same way as in Britain.
Functional Ecology,1998,12(3):480-485
|
被引
35
次
|
|
|
|
18.
Thompson K. The functional ecology of seed banks.
Seeds:the ecology of regeneration in plant communities,1992:231-258
|
被引
5
次
|
|
|
|
19.
Leishman M R. Does the seed size/number tradeoff model determine plant community tructure? An assessment of the model mechanisms and their generality.
OIKOS,2001,93:294-302
|
被引
27
次
|
|
|
|
20.
周兴民.
中国嵩草草甸,2001
|
被引
119
次
|
|
|
|
|