乌鲁木齐河源区冰缘苔藓植物生态学特征研究

Bryophytes, with strong ability tolerant to cold, drought and， barren environments, are one kind of pioneer plants in succession processes. This project intends to investigated composition of the species, floristic composition , distribution diversity, community characteristics of bryophytes in Urumqi River head area, especially the Tianshan Glacier No.1. On this basis, bryophytes morphological characters, especially reproductive strategies, will be studied comparing to other specimens from similar or different habitats. Physiological and ecological adaptation of bryophytes to periglacial habitats, including chlorophyll content, free amino acids, soluble sugar content, soluble protein, ascorbic acid (AsA), malondialdehyde (MDA), antioxidant enzymes (SOD, CAT, and POD) activity, total flavonoid content and its antioxidant capacity, and nutritional elements content will be explored at the same time. What is bryophytes role in native vegetation succession process after Glacial retreat will be understood. The results will be the first to get information on the classification and ecology of bryophytes in periglacial areas in China. The project will broaden the research area of Chinese bryology, strengthen bryoflora and alpine ecology in cold and arid regions. Also for subsequent in-depth study to explore cold resistance mechanism of bryophytes.

苔藓植物具有很强的耐寒、耐旱、耐瘠薄等抗逆性状，是环境演替过程中最主要的先锋植物之一。本项目拟在乌鲁木齐河源区，特别是天山一号冰川退缩地, 对苔藓植物的种类构成、区系成分、分布规律、多样性、群落特征等进行调查，全面、系统地摸清乌鲁木齐河源区苔藓植物的"本底值"。在此基础上，与来自其他生境条件相似或差别较大地区的种类之间，进行植物体形态结构特征对比观察研究，重点关注其繁殖策略。探讨冰缘苔藓植物对周围环境的生理生态适应特征,包括叶绿素含量、游离氨基酸、可溶性糖含量、可溶性蛋白、抗坏血酸含量、丙二醛、抗氧化酶活性, 总黄酮含量及抗氧化能力, 营养元素含量等。并研究苔藓植物在冰川退缩地植被原生演替过程中的作用。研究结果将在国内首次获得冰缘区苔藓植物的分类及生态学信息。本项目将拓宽我国苔藓植物学的研究区域，加强高山寒区旱区的苔藓植物区系与生态学研究。也为后续深入探讨苔藓植物抗寒机理研究奠定基础。

对乌鲁木齐河源区退缩地的苔藓植物种类构成、区系成分及群落特征等进行了研究，全面、系统地摸清乌鲁木齐河源区苔藓植物的“本底值”和繁殖策略，研究了50种左右高寒地区苔藓植物的形态适应特征并测定了一些生理生态的基本指标；探讨了苔藓植物在冰川退缩地植被原生演替过程中的作用。研究结果将在国内首次获得冰缘区苔藓植物的分类及生态学信息，拓宽我国苔藓植物学的研究区域，加强高山寒区旱区的苔藓植物区系与生态学研究，也为后续深入探讨苔藓植物抗寒机理研究奠定基础