学术
摘 要:
采用2×2列联表，运用方差比率法（VR）、χ^2统计量检验、联结系数（AC）和共同出现百分率（PC）等指标，以关联测度指标（OI、DJ、JI）为参考，对内蒙古自治区乌兰布和沙漠天然白刺（Nitraria tangtorum）种群及其伴生种的种间关联性进行分析，结果表明：天然白刺种群内8个主要物种总体关联性表现为无关联。在全部的28个种对中，15个种对表现为正联结，13个种对间表现为负联结。种对中除白刺-沙蒿表现为显著负联结外，其他种对间联结性均不显著。主要物种白刺与草本，草本与草本之间趋向独立分布。通过对天然白刺种群总体以及种间的关联性研究，为构建稳定的沙漠植物群落、恢复重建沙漠地区的植被、改善沙漠地区生态格局提供理论指导。[著者文摘]
文章出处:
《植物研究》-2008年1期 -98-103页
分 类 号:
文献标识码:
A
文章编号:
1673-5102（2008）01-0098-06
Interspecific Associations of Natural Nitraria tangtorum Population and Its Main Companion Species in Ulanbuh Desert
LI Zhi-San LI Feng-Ri （ Forestry College, Northeast Forestry University, Harbin 150040）
Abstract:
A series of techniques including the variance rate（ VR）, χ^2-test, the association co-efficient （AC）, the percentage of co-ocurrenc （PC） consulting the association indices（ OI,DJ,JI） were used together with a 2×2 contingency table to analyze the interspecific associations of natural Nitraria tangtorum population and its main companion species in Ulanbuh desert Inner Mongolia. The result showed that： in the natural Nitraria tangtorum population,the association of 8 dominant species showed no correlation. By the calculation results, in all 28 species-pairs, there are 15 species-pairs which revealed positive association, and 13 species-pairs revealed negative association. Most of the species-pairs revealed little significant association except Nitraria tangtorum-Artemisia ordosica. Nitraria tangtorum-Artemisia ordosica revealed significant negative association. Nitraria tangtorum-herbage and other herbaceous species-pairs distributions trend to be independent. The result is very important to construct steady desert plant community, reconstruct desert plant community and regulate ecological pattern in theory.[著者文摘]
Key words:
Natural Nitraria tangtorum; interspecific associations ; population ; Ulanbuh desert
基金资助:
国家自然科学基金国际合作项目（30510103195）、国家社会公益研究专项资金项目（2005DIB5J142）
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