Subjects: Biology >> Ecology submitted time 2017-11-23 Cooperative journals: 《生态学报》
Abstract：分别以群丛类型和生长基质类型（包括树生、石生、土生）作为资源轴，对小秦岭56个样方中苔藓植物的生态位特征进行分析和对比。结果表明：（1）两种资源轴上苔藓物种的生态位特征存在一定差异，不同资源轴上，苔藓物种生态位宽度排序发生一定改变。两种资源轴上，青藓属（Brachythecium）均具有较大的生态位宽度，而酸土藓属（Oxystegus）和叶苔属（Jungermania）在不同资源轴上生态位宽度差异较大。（2）对比两种资源轴上的生态位重叠值，生长基质类型明显高于群丛类型；在不同资源轴上，个别物种生态位重叠值排序还会发生明显改变。树平藓属（Homaliodendron）与金灰藓属（Pylaisiella）在两种资源轴上表现出完全相反结果。（3）与维管植物相似，生态位宽度较大的苔藓物种生态位重叠值高，生态位宽度小的苔藓物种也会有较大生态位重叠。
Subjects: Biology >> Ecology submitted time 2017-11-10 Cooperative journals: 《生态学报》
Abstract：分别以群丛类型和生长基质类型（包括树生、石生、土生）作为资源轴，对小秦岭56个样方中苔藓植物的生态位特征进行分析和对比。结果表明：（1）两种资源轴上苔藓物种的生态位特征存在一定差异，不同资源轴上，苔藓物种生态位宽度排序发生一定改变。两种资源轴上，青藓属（Brachythecium）均具有较大的生态位宽度，而酸土藓属（Oxystegus）和叶苔属（Jungermania）在不同资源轴上生态位宽度差异较大。（2）对比两种资源轴上的生态位重叠值，生长基质类型明显高于群丛类型；在不同资源轴上，个别物种生态位重叠值排序还会发生明显改变。树平藓属（Homaliodendron）与金灰藓属（Pylaisiella）在两种资源轴上表现出完全相反结果。（3）与维管植物相似，生态位宽度较大的苔藓物种生态位重叠值高，生态位宽度小的苔藓物种也会有较大生态位重叠。
Subjects: Biology >> Ecology submitted time 2017-04-26 Cooperative journals: 《生态学报》
Abstract：苔藓物种多样性沿海拔梯度呈什么样的分布格局? 基于 53 个 20 m×20 m 样地，采集并鉴定了样地内所有生境中的苔藓 物种;采用多元回归树(multivariate regression trees， MRT)对苔藓植物进行分类;采用典范对应分析(canonical correspondence analysis， CCA)进行排序分析;用广义线性模型(Generalized Linear Model， GLM)研究苔藓物种多样性沿海拔的分布格局。 结果 如下:(1)采集的 1378 份苔藓植物标本经过鉴定，共有 33 科 89 属 240 种，其中藓类 226 种，苔类 14 种;(2)经交叉验证认为本 区苔藓植物可分为 4 类，I长肋青藓(Brachythecium populeum) +大叶匐灯藓(Plagiomnium succulentum) +圆叶匐灯藓 (Plagiomnium vesicatum) 群落，II灰白青藓(Brachythecium albicans) +宽叶青藓(Brachythecium curtum) +短肋羽藓(Thuidium kanedae)+平肋提灯藓(Mnium laevinerve) 群落，III短肋羽藓(Thuidium kanedae) +光萼叶苔(Jungermannia leiantha) +薄罗藓 (Leskea polycarpa) + 叉 肋 藓 ( Trachyphyllum inflexum) 群 落， IV 宽 叶 青 藓 ( Brachythecium curtum) + 垂 蒴 棉 藓 ( Plagiothecium nemorale)+全缘匐灯藓(Plagiomnium integrum) 群落;(3)海拔、坡度和坡向对苔藓物种分布的解释量为 7.29%;(4)苔藓物种多 样性随海拔的变化成明显的上升格局。 通过研究了解了小秦岭国家级自然保护区苔藓物种组成、群丛划分以及每种苔藓植物 的海拔分布范围;苔藓物种多样性随海拔的上升呈显著的上升格局，与乔木、灌木和草本的分布格局不同。 希望此研究能为苔 藓植物生态学研究和物种多样性保护提供参考。
Subjects: Biology >> Botany >> Applied botany submitted time 2023-07-26 Cooperative journals: 《广西植物》
Abstract： In order to understand the difference in microbial diversity between wild and cultivated Anemone altaica rhizosphere soil. and Illumina MiSeq high-throughput sequencing was used to study the microbial composition and diversity in rhizosphere soils between wild and cultivated A. altaica. The results were as follows: (1) Alpha diversity analysis showed that the diversity of fungi in the rhizosphere soil of wild A. altaica was significantly higher than that of cultivated A. altaica (P < 0.05), while the difference in bacterial diversity was not significant (P > 0.05). The non-metric multidimensional scaling (NMDS) revealed that the fungal community structures of wild and cultivated A. altaica rhizosphere soil had more significant differences. (2) A total of 9 566 operational taxonomic units (Otus) of bacteria belonged to 39 phyla, 127 classes, 315 orders, 500 families and 886 genera; and 2 670 operational taxonomic units (Otus) of fungi belonged to 15 phyla, 57 classes, 138 orders, 293 families and 597 genera. The bacterial phylum Proteobacteria, Acidobacteria, Actinobacteria and the fungal phylum Basidiomycota, Ascomycota, Mortierellomycota were the dominant phylas in the rhizosphere soil between wild and cultivated plants, despite their relative abundance was different. At genus level, Candidatus_udaeobacter, Norank_f_xanthobacteraceae and Rokubacteriales were the dominant rhizosphere soil bacteria of wild A. altaica. However, Candidatus_udaeobacter, Vicinamibacter and Rokubacteriales were the dominant rhizosphere soil bacteria of cultivated A. altaica. The dominant rhizosphere fungi of wild A. altaica were Mortierella, Sebacina and Russula, while the dominant rhizosphere fungi of the cultivated A. altaica were Sebacina, Mortierella and Unclassified_f_hyaloscyphaceae. (3) The redundancy analysis (RDA) showed that organic matter was the main factor affecting soil bacterial community (P < 0.05), and soil pH, alkali-hydrolyzable nitrogen and available phosphorus were the main factors affecting fungi communities (P < 0.05)., while bacterial community structure were not significantly correlated with soil pH, alkali-hydrolyzable nitrogen and available phosphorus (P > 0.05). In summary, our study revealed significant difference in the composition and diversity of rhizosphere microbial communities between wild and cultivated A. altaica, and the main soil factors influencing its rhizosphere microbial communities, the results of this study have certain significance for scientific planting and soil improvement of A. altaica.
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