| 李玉峰,钟智明,张志坚,杨诗敏,黄萧洒,梅启明.广东紫金白溪省级自然保护区米槠群落主要树种的生态位特征和种间联结性[J].林业调查规划,2026,51(4):108-115 |
| 广东紫金白溪省级自然保护区米槠群落主要树种的生态位特征和种间联结性 |
| Niche Characteristics and Interspecific Association of Dominant Tree Species in Castanopsis carlesii Community in Baixi Provincial Nature Reserve of Zijin County |
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| DOI： |
| 中文关键词: 米槠群落 生态位宽度 生态位重叠 种间联结 白溪保护区 |
| 英文关键词: Castanopsis carlesii community niche width niche overlap interspecific associations Baixi Provincial Nature Reserve |
| 基金项目:2024年广东省自然资源事务管理-生态林业建设专项资金(自然保护地建设)项目(ZJZTGJ202403C022). |
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| 中文摘要: |
| 为探究广东紫金白溪省级自然保护区的米槠林群落特征,建立一个1 hm2样地,调查并分析米槠林乔木层27个优势树种的生态位特征与种间联结关系。结果表明,群落的重要值和生态位宽度大致呈正相关,米槠的重要值(IV=17.14)在群落中占绝对优势,但其生态位宽度与华润楠(IV=4.32,BL=18.86,BS=3.08)和密花山矾(IV=3.30,BL=18.57,BS=3.05)相近。群落的Schoener和Pianka生态位重叠指数平均值分别为0.43和0.47。物种对以低度重叠为主,占71.23%;而高度重叠和中度重叠仅占5.13%和23.65%。群落的总体联结性呈极显著正联结(P<0.01)。Spearman和Pearson系数都显示正联结物种对数高于负联结;不显著物种对数高于显著物种对数。可得结论,白溪米槠林处于稳定的顶极群落阶段,主要树种之间的竞争趋于平衡。 |
| 英文摘要: |
| To investigate the community characteristics of Castanopsis carlesii forest, a 1 hm2 plot in Baixi Provincial Nature Reserve, Zijin County, Guangdong Province was established. The niche characteristics and interspecific associations of 27 dominant tree species in arbor layer of C.carlesii community were surveyed and analyzed. The results showed that the importance value (IV) and niche width of the community were approximately positively correlated. The IV value of C.carlesii (17.14) was absolutely dominant in the community, but its niche width was similar to that of Machilus chinensis (IV=4.32, BL=18.86, BS=3.08) and Symplocos congesta (IV=3.30, BL=18.57, BS=3.05). The average values of Schoener′s and Pianka′s niche overlap indicators for the community were 0.43 and 0.47, respectively. Low niche overlap was predominant among species pairs, accounting for 71.23%, while high and moderate niche overlaps accounted for only 5.13% and 23.65%. The overall connectivity of the community showed a highly significant positive association (P<0.01). Both Spearman′s rank and Pearson′s correlation coefficients indicated that the number of positively associated species pairs was higher than that of negatively associated ones; nonsignificant species pairs outnumbered significant ones. In summary, the C.carlesii forest in Baixi Reserve is at a stable climax community stage, with competition among major tree species tending toward equilibrium. |
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