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OALib Journal期刊
ISSN: 2333-9721
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山西阳泉矿区煤矸石山自然定居植物群落优势种种间关系*
DOI: 10.3724/SP.J.1145.2015.04019, PP. 1-9
Keywords: 阳泉矿区,煤矸石山,优势种,种间关系,生态种组
Abstract:
为揭示煤矸石山自然定居植物群落16个优势种的种间联结性，本文在野外样方调查的基础上，采用χ2检验，pearson相关检验和spearman秩相关检验方法，研究了阳泉矿区煤矸石山自然定居植物群落16个优势种种间关系。在此基础上，采用聚类分析方法，将16个优势种分为三个生态种组，导致生态种组分化的主导因子是土壤水分条件。结果进一步表明：（i）120个种对中，χ2检验与pearson相关检验的正负关联比(分别为3.0和1.80)大于1，而spearman秩相关检验的正负关联比(0.94)小于1；（ii）与χ2检验和pearson相关检验相比，spearman秩相关检验的灵敏度高于pearson相关检验，反映种间关系更准确；（iii）120个种对中呈不显著相关种对数明显大于极显著或显著相关种对，说明阳泉矿区煤矸石山自然定居植物群落的结构简单，仍处于演替初、中期阶段，因此在矸石山植被恢复初期应以人工恢复为主，以加快其演替进程；优势种白羊草与臭椿、荆条与刺槐、杠柳与荆条或刺槐、臭椿与刺槐等5个种对间呈极显著或显著正相关，它们为耐旱、耐贫瘠、生态适应性强的先锋物种，可用于该区煤矸石山人工植被恢复的优选先锋物种进行混合种植。图5表2参21
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