西藏墨脱藓类植物多样性及垂直分布规律研究
A Study of the Diversity and Vertical Distribution of Mosses in Motuo, Xizang
研究墨脱典型区域藓类植物的垂直分布,为整个墨脱地区苔藓植物分布及环境适应性的进一步研究提供基础资料。采用线路调查和普采相结合的方式,对该区进行野外标本采集、物种鉴定和生态学统计分析。结果显示:(1)共采集到该区藓类植物58科217属698种(含变种、亚种)。(2)该区5个垂直分布带TRF植被分布带藓类植物丰富度最高,共298种,占该区藓类植物总数的42.69%;ASM分布带中藓类植物丰富度最低,仅14种,占该区藓类植物总数的2.01%。(3)该区藓类植物的多样性随海拔升高呈先减后增再减的双峰趋势,其中海拔500 ~ 1 000 m的植被分布带多样性最为丰富,与1 000 ~ 1 800 m的SEB植被分布带相似度最高;而海拔在3 800 ~ 4 400 m的植被分布带中藓类植物多样性最稀少,与其它几个分布带的相似性都非常低。这说明随着海拔升高,相应的植被类型、气候条件的变化对藓类植物的分布和多样性有着显著影响,墨脱藓类植物随海拔升高呈现出明显的垂直分布规律。
To investigate the vertical distribution of mosses in representative areas of Motuo, providing baseline data for further studies on the distribution and ecological adaptation of bryophytes throughout the Motuo region, a combination of line survey and general mining was used to conduct field specimen collection, species identification and ecological statistical analysis in the area. (1) A total of 698 species (including varieties and subspecies) of mosses belonging to 217 genera and 58 families were collected in the area. (2) The richness of mosses in the TRF vegetation distribution zone among the five vertical distribution zones in the area was the highest, with a total of 298 species, accounting for 42.69% of the total number of mosses in the area; the richness of mosses in the ASM distribution zone was the lowest, with only 14 species, accounting for 2.01% of the total number of mosses in the area. (3) The diversity of mosses in the area showed a bimodal trend of first decreasing, then increasing, and then decreasing with increasing altitude. The vegetation distribution zone with an altitude range of 500 ~ 1 000 m had the richest diversity and had the highest similarity with the SEB vegetation distribution zone with an altitude range of 1 000 ~ 1 800 m, while the diversity of mosses in the vegetation distribution zone with an altitude range of 3 800 ~ 4 400 m was the rarest, and the similarity with the other distribution zones was very low. This showed that with the increase in altitude, the corresponding changes in vegetation types and climatic conditions had a significant impact on the distribution and diversity of mosses. The mosses in Motuo showed obvious vertical distribution pattern with increasing altitude.
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国家自然科学基金(32060264)
西藏自治区2023年科技计划项目(XZ202301ZY0041G)
西藏高原森林生态教育部重点实验室研究生创新计划项目(XZA-JYBSYS-2023-23)
西藏农牧学院农业资源与环境学科建设项目(2024)
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