This paper aims to study characteristics and biodiversity of the Torreya fargesii community in the Jinfo Mountains to provide baseline information related to the protection of T. fargesii. The results indicated that a...This paper aims to study characteristics and biodiversity of the Torreya fargesii community in the Jinfo Mountains to provide baseline information related to the protection of T. fargesii. The results indicated that among the 5 plots(100 m2 each) set along an altitudinal gradient, 176 species of vascular plants, 136 genera and 64 families were recorded. These included 7 species of pteridophytes, 6 genera and 4 families, 3 species of gymnosperms, 3 genera and 2 families, and 166 species of angiosperms, 127 genera and 58 families. The community physiognomy was mainly dominated by phanerophytes with medium-sized herbaceous and simple leaves. The proportions of phanerophytes among the fl oristic spectrum, frequency spectrum and vegetational spectrum are 68.75%, 73.13% and 67.48% respectively. The vertical structure can be divided into the shrub and herb layers in this community. The dominant species in shrub layer were T. fargesii, Zanthoxylum ovalifolium, Rubus coreanus, Kerria japonica, Cotoneaster horizontalis etc.. The dominant herbs included Miscanthus sinensis, Carex gibba, Artemisia lactifl ora, Pteridium aquilinum var. latiusculum, Pilea notata, Aster ageratoides etc.. Species richness(S) and the Simpson(D), Shannon-Wiener(H') and Pielou evenness(Jsw) indices of shrub layer species richness are higher than those of the herb layer; the distribution of the species in the community is obviously uneven. The species richness and diversity indices increase with the rising altitude.展开更多
黑叶猴是国家一级保护动物,由于人类活动导致其生境破碎化加剧,威胁种群的生存安全。本文以黑叶猴在重庆的主要分布区金佛山为例,考虑地形、植被、人为活动和饮水因素等,选取与黑叶猴生境密切相关的7个环境影响因子,对黑叶猴生境适宜性...黑叶猴是国家一级保护动物,由于人类活动导致其生境破碎化加剧,威胁种群的生存安全。本文以黑叶猴在重庆的主要分布区金佛山为例,考虑地形、植被、人为活动和饮水因素等,选取与黑叶猴生境密切相关的7个环境影响因子,对黑叶猴生境适宜性进行了分析,并利用最小累积阻力(MCR)模型构建了潜在生境之间的生态廊道。结果表明,黑叶猴最适宜生境面积为178.07 km 2,仅占研究区总面积的12.15%,主要分布在金佛山中部和东北部地区的沟谷地带,潜在生境斑块呈条带状,破碎化状态明显,具有海拔高、坡度陡、临近水源、植被覆盖度高、远离人为活动干扰等特点;构建的生态廊道共有56条,廊道最小宽度为303.9 m,廊道总长度为147.82 km,总面积为43.89 km 2。本文的研究成果对黑叶猴种群和生境的保护具有重要指导意义。展开更多
基金Supported by National Natural Science Foundation of China(31470568)Project of Scientifi c Research Innovation Team of Yangtze Normal University(2014XJTD06)
文摘This paper aims to study characteristics and biodiversity of the Torreya fargesii community in the Jinfo Mountains to provide baseline information related to the protection of T. fargesii. The results indicated that among the 5 plots(100 m2 each) set along an altitudinal gradient, 176 species of vascular plants, 136 genera and 64 families were recorded. These included 7 species of pteridophytes, 6 genera and 4 families, 3 species of gymnosperms, 3 genera and 2 families, and 166 species of angiosperms, 127 genera and 58 families. The community physiognomy was mainly dominated by phanerophytes with medium-sized herbaceous and simple leaves. The proportions of phanerophytes among the fl oristic spectrum, frequency spectrum and vegetational spectrum are 68.75%, 73.13% and 67.48% respectively. The vertical structure can be divided into the shrub and herb layers in this community. The dominant species in shrub layer were T. fargesii, Zanthoxylum ovalifolium, Rubus coreanus, Kerria japonica, Cotoneaster horizontalis etc.. The dominant herbs included Miscanthus sinensis, Carex gibba, Artemisia lactifl ora, Pteridium aquilinum var. latiusculum, Pilea notata, Aster ageratoides etc.. Species richness(S) and the Simpson(D), Shannon-Wiener(H') and Pielou evenness(Jsw) indices of shrub layer species richness are higher than those of the herb layer; the distribution of the species in the community is obviously uneven. The species richness and diversity indices increase with the rising altitude.
文摘黑叶猴是国家一级保护动物,由于人类活动导致其生境破碎化加剧,威胁种群的生存安全。本文以黑叶猴在重庆的主要分布区金佛山为例,考虑地形、植被、人为活动和饮水因素等,选取与黑叶猴生境密切相关的7个环境影响因子,对黑叶猴生境适宜性进行了分析,并利用最小累积阻力(MCR)模型构建了潜在生境之间的生态廊道。结果表明,黑叶猴最适宜生境面积为178.07 km 2,仅占研究区总面积的12.15%,主要分布在金佛山中部和东北部地区的沟谷地带,潜在生境斑块呈条带状,破碎化状态明显,具有海拔高、坡度陡、临近水源、植被覆盖度高、远离人为活动干扰等特点;构建的生态廊道共有56条,廊道最小宽度为303.9 m,廊道总长度为147.82 km,总面积为43.89 km 2。本文的研究成果对黑叶猴种群和生境的保护具有重要指导意义。
