赤水河上游主要森林植被中苔藓物种多样性研究

对赤水河上游典型森林植被中苔藓植物多样性调查分析。(1)苔藓植物有15科19属28种(含变种、亚种)；生活型有3种：交织型(64.29%)、矮丛集型(28.57%)和平铺型(7.14%)。(2)丰富度以竹叶林中最大(2.131)，残存阔叶林中次之(0.687)，针叶林中最小(-1.444)。(3)α多样性呈现一定的规律，竹叶林（3.170）＞残存阔叶林（3.000）＞人工植被地（2.807）＞灌木林（2.322）＞针叶林=谷顶区(1.585)，α多样性的排序规律与丰富度基本保持一致，均出现在竹叶林中最大。(4)β多样性出现灌木林—残存阔叶林生境中最高（1.000），竹叶林—残存阔叶林中次之（0.938），灌木林—针叶林（0.857）中最小的变化差异趋势。分析得出了植被型、湿度和荫蔽度是制约着该地区苔藓植物多样性的主要生态因素。通过苔藓植物多样性的探究，为保护该流域生态环境和生物多样性提供参考价值。

Species Diversity of Bryophytes in Main Forest Vegetations in Upper Reach of Chishui River

An investigation on the bryophyte species diversity in main forest vegetations was made in upper valley reach of Chishui river, Guizhou province, China. The results showed: (1)There were 28 taxa of bryophytes belonging to 19 genera and 15 families and the life-forms are wefts (64.29%), short turfs (28.57%) and mats (7.14%). (2)The species richness of bryophytes was the largest in bamboo forest (2.131), remnants of broadleaved forest was second (0.687) and the smallest in coniferous forest (-1.444). (3)α diversity index of bryophytes is bamboo forest (3.170)>remnants of broadleaved forest (3.000)>artificial vegetation area (2.807)>shrubbery forest (2.322)>coniferous forest and top valley area (1.585). (4)β diversity index of bryophytes was the highest between shrubbery forest and remnants of broadleaved forest (1.000), the second is between Bamboo Forest and Remnants of Broadleaved Forest (0.938) and the smallest is between shrubbery forest and coniferous forest (0.857). The biodiversity of bryophytes was correlated with forest vegetation, shade degrees and humidity in the forest. Research on the biodiversity of bryophytes is good for protection of biodiversity and providing scientific data and information.