生物结皮对荒漠草本植物群落结构的影响

doi:10.13866/j.azr.2017.06.16

干旱区研究

生物结皮对荒漠草本植物群落结构的影响

庄伟伟¹ 张元明^2*

（1新疆师范大学生命科学学院，新疆特殊环境物种保护与调控生物学实验室，干旱区植物逆境生物学实验室，乌鲁木齐，830054;2*中国科学院新疆生态与地理研究所，中国科学院干旱区生物地理与生物资源重点实验室，乌鲁木齐，830011）

收稿日期:2016-11-02 修回日期:2017-05-05 出版日期:2017-11-15 发布日期:2017-12-20
通讯作者: 张元明.E-mail:zhangym@ms.xjb.ac.cn
作者简介:庄伟伟(1986-)，女，博士研究生，主要从事干旱区植物生理生态方面的研究工作. E-mail: zww8611@sina.com
基金资助:
新疆师范大学干旱区植物逆境生物学重点实验室开放课题(XJNUSYS112017A02)；国家自然科学基金(41763009)；新疆维吾尔自治区自然科学基金(2016D01B049)；新疆师范大学博士启动基金(XJNUBS1607)；新疆联合基金项目(U1503101)和新疆维吾尔自治区百名博士引进计划(BS2016008)资助

Effect of Soil Microbiotic Crust on Plant Community in the Gurbantunggut Desert

ZHUANG Wei-wei¹, ZHANG Yuan-Ming^2*

(1.Xinjiang Key Laboratory of Special Species Conservation and Regulatory Biology, College of Life Sciences, Xinjiang Normal University, Urumqi, China, 830054; 2.Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Key Laboratory of Bioresource in Arid Land, Chinese Academy of Sciences, Urumqi, China, 830011.)

Received:2016-11-02 Revised:2017-05-05 Online:2017-11-15 Published:2017-12-20

摘要/Abstract

摘要： 摘要：通过人工去除生物结皮试验，分析古尔班通古特沙漠生物结皮对常见荒漠草本植物群落结构的影响。根据人为去除生物结皮的试验结果，结合生物结皮对种子萌发、幼苗存活以及土壤养分和水分等影响，综合分析生物结皮对草本植物多样性的影响。结果表明：尖喙牻牛儿苗[WTBX](Erodium oxyrrhynchum)、条叶庭荠(Alyssum linifolium)、琉苞菊(Hyalea pulchella)、荒漠庭荠(Alyssum desertorum)及旱麦草(Eremopyrum triticeum)[WTBZ]的生物量总和占总生物量的90%以上，是该沙漠的优势草本植物。去除生物结皮后，草本植物的植被高度、物种丰富度和多样性指数都显著提高；但是，植被盖度、密度和群落生物量却显著降低。说明生物结皮的存在改变了古尔班通古特沙漠南缘荒漠草本植物的群落结构，植被盖度和群落生物量提高，这对于防风固沙、稳定沙面具有重要的生态意义。

关键词: 生物结皮, 草本植物, 植物多样性, 群落结构, 生物量, 古尔班通古特沙漠

Abstract: Abstract：The plant communities in the microbiotic crustintact and microbiotic crustremoved plots in the Gurbantonggut Desert were investigated. The desert is mosaicspatched by vascular plants and soil microbiotic crust. The influence of soil microbiotic crust on seed germination,seedling survival,soil nutrient content and water distribution was firstly discussed,and then the influence of soil microbiotic crust on plant diversity was studied. The results showed that the sum of the biomass of five dominant herb species including Erodium oxyrrhynchum,Alyssum linifolium,Hyalea pulchella,Alyssum desertorum and Eremopyrum triticeum contributed more than 90% of the total aboveground biomass of the synusia. Compared with the microbiotic crustintact plot,the plant height,Shannon Wiener diversity index (H) and species richness (R) were significantly increased after the microbiotic crust was removed. However,the plant density,productivity and coverage were lower than those in microbiotic crustintact plot. These results indicated that the diversity and coverage of herbaceous plants were significantly affected by microbiotic crust. It is concluded that microbiotic crust could promote the restoration of desert ecosystem.

Key words: icrobiotic crust, herbaceous plant, plant diversity, community structure, biomass, the Gurbantunggut Desert

庄伟伟，张元明. 生物结皮对荒漠草本植物群落结构的影响[J]. 干旱区研究, 2017, 34(6): 1338-1344.

ZHUANG Weiwei,ZHANG Yuanming. Effect of Soil Microbiotic Crust on Plant Community in the Gurbantunggut Desert[J]. , 2017, 34(6): 1338-1344.

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生物结皮对荒漠草本植物群落结构的影响

Effect of Soil Microbiotic Crust on Plant Community in the Gurbantunggut Desert

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