土地利用变化对高寒草甸植物群落结构及物种多样性的影响
Effects of changes in land use on plant community structure and species diversity in alpine meadows
查看参考文献16篇
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文摘
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以原生高寒嵩草草甸封育系统为对照,研究了不同土地利用对植物群落结构和物种多样性的影响,检验了不同人工重建措施对植被的相对影响程度.研究结果表明:高寒嵩草草甸草地退化导致植被稀疏、覆盖度下降、群落物种组成减少、群落中各功能群的比例发生变化、物种多样性降低.退化草地封育自然恢复7年后,恢复最快的是一年生杂草,其次是禾草类;重度退化草地改建成人工草地7年后,禾本科植物仍然是群落中的优势类群,但原生植被中的优势功能群--莎草类在任何人工草地中没有出现;经相关分析表明,物种多样性指数与均匀度指数呈极显著正相关(P＜0.01),与物种丰富度呈显著正相关(P＜0.05).不同土地利用条件下,各群落之间种相似性系数的变化表明,退化草地经过多年的封育,或经松耙补播后逐步向原生植被方向演替;人工草地逐步向退化演替方向发展. |
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其他语种文摘
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In this paper, the effect of land degradation on species composition and species diversity has been studied and the relative influence of various rehabilitation practices (three seeding treatment and a non-seeded natural recovery treatment) on vegetation in early secondary succession examined. The results showed that grassland degradation on alpine meadow led to a drop in vegetation cover, change of plant species composition, loss of species diversity and decrease in the type of functional group (for example sedges and grasses almost disappeared in severely degraded land). Many annual forbs and a few grasses have invaded and established themselves during the seven years of natural recovery. After 7 years, grasses are still the dominant group in all seeding treatments. But sedges that are the dominant group on primary vegetation have not appeared in any seeding treatment. Correlation analysis showed that species diversity index was of significantly positive correlation with evenness index (P < 0.01), and was of positive correlation with species richness (P < 0.05). Similarity index among the treatments showed that natural recovery and harrowing + seeding treatment accelerated succession to primary vegetation while plowing + seeding treatment secured succession to degraded grassland. |
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来源
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兰州大学学报. 自然科学版
,2007,43(3):58-63 【核心库】
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关键词
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土地利用变化
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植物群落结构
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物种多样性
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功能群
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高寒草甸
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地址
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1.
青海省畜牧兽医职业技术学院, 青海, 湟源, 812000
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青海师范大学, 青藏高原环境与资源教育部重点实验室, 青海, 西宁, 810008
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中国科学院,西北高原生物研究所, 青海, 西宁, 810001
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0455-2059 |
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学科
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农业基础科学 |
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基金
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国家“十五”科技攻关项目
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青海省科技攻关项目
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青海省科技厅项目
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文献收藏号
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CSCD:2912090
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参考文献 共
16
共1页
|
|
1.
王启基. 青藏高原草地资源环境及可持续发展研究.
青海草业,1997,6(3):1-11
|
被引
20
次
|
|
|
|
|
2.
李博. 中国北方草地退化及其防治对策.
中国农业科学,1997,30(6):1-9
|
被引
252
次
|
|
|
|
|
3.
NAEEM S. Biodiversity enhances ecosystem reliability.
Nature,1997,390:507-509
|
被引
82
次
|
|
|
|
|
4.
TILMAN D. Biodiversity and stability in grassland.
Nature,1994,367:363-365
|
被引
291
次
|
|
|
|
|
5.
张全国. 生物多样性与生态系统功能：进展与争论.
生物多样性,2002,10(1):49-60
|
被引
81
次
|
|
|
|
|
6.
史惠兰. 江河源区人工草地群落特征、多样性及其稳定性分析.
草业学报,2005,14(3):23-30
|
被引
39
次
|
|
|
|
|
7.
张镱锂. 植物区系地理研究中的重要参数——相似性系数.
干旱区研究,1998,13(1):59-63
|
被引
36
次
|
|
|
|
|
8.
VITOUSEK P M. Biological diversity and terrestrial biogeochemistry.
Biodiversity and Ecological Fuunction,1993:3-14
|
被引
1
次
|
|
|
|
|
9.
孙国钧. 植物功能多样性与功能群研究进展.
生态学报,2003,23(7):1431-1435
|
被引
3
次
|
|
|
|
|
10.
SALA O E. Biodiversity and ecosystem functioning in grasslands.
Functional Roles of Biodiversity:A Global Perspective,1996:129-149
|
被引
1
次
|
|
|
|
|
11.
余作岳.
热带亚热带退化生态系统植被恢复生态学研究,1996:1-30
|
被引
11
次
|
|
|
|
|
12.
TILMAN D. Biodiversity:population versus ecosystem stability.
Ecology,1996,77:350-317
|
被引
126
次
|
|
|
|
|
13.
TILMAN D. Community invisibility recruitment limitation and grassland biodiversity.
Ecology,1997,76:81-92
|
被引
42
次
|
|
|
|
|
14.
赵平. 恢复生态学——退化生态系统生物多样性恢复的有效途径.
生态学杂志,2000,19(1):53-58
|
被引
40
次
|
|
|
|
|
15.
TRENBATH B R. Productivity of mixtures.
Advances in Agronomy,1974,26:77-10
|
被引
1
次
|
|
|
|
|
16.
BAZZAZ F A. Experimental studies on the evolution of niche in successional plant populations.
Colonization,Succession and Stability,1984:245-272
|
被引
1
次
|
|
|
|
|
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