| 生物土壤结皮对荒漠昆虫多样性的影响 |
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| 引用本文： | 陈进福,李新荣,陈应武,苏延桂. 生物土壤结皮对荒漠昆虫多样性的影响[J]. 中国沙漠, 2006, 26(6): 986-996 |
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| 作者姓名： | 陈进福 李新荣 陈应武 苏延桂 |
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| 作者单位： | 1.青海省林业科学研究所, 青海 西宁 810016; 2.中国科学院寒区旱区环境与工程研究所 沙坡头沙漠研究试验站, 甘肃 兰州 730000 |
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| 摘 要： | 生物土壤结皮广泛分布在干旱半干旱地区与寒区荒漠,是荒漠生态系统的主要组成和景观特征之一,其重要性已被大量的研究报道所证实。然而,关于生物土壤结皮与昆虫种类多样性之间关系的研究却很少。本文以腾格里沙漠东南缘的沙坡头地区半固定沙丘柠条－油蒿群落和固定沙丘柠条－油蒿群落为观测样地,选择具有不同类型生物土壤结皮分布的植被群落为观测样方。昆虫的调查采用100 m×100 m的样方,利用样筐和网捕法收集昆虫,记录昆虫数量,采集标本在室内进行鉴定。结果表明:与无结皮覆盖的植被区相比,生物土壤结皮在地表的覆盖显著地增加了昆虫的多样性和种的丰富度,其中以苔藓和地衣为主的结皮覆盖的植被样方中昆虫种的多样性和丰富度显著地高于以蓝藻和藻类为主的结皮样方。生物土壤结皮对荒漠昆虫多样性的贡献可能是由于稳定了土表、改善了植被系统中的土壤环境,为昆虫,特别是幼虫阶段提供相对适宜的土壤生境或部分食物来源。
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| 关 键 词： | 生物土壤结皮 腾格里沙漠 生物多样性 荒漠昆虫 |
| 文章编号： | 1000-694X（2006）06-0986-11 |
| 收稿时间： | 2006-01-24 |
| 修稿时间： | 2006-05-12 |
Effect of Soil Microbiotic Crust on Desert Insect Diversity |
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| CHEN Jin-fu,LI Xin-rong,CHEN Ying-wu,SU Yan-gui. Effect of Soil Microbiotic Crust on Desert Insect Diversity[J]. ournal of Desert Research, 2006, 26(6): 986-996 |
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| Authors: | CHEN Jin-fu LI Xin-rong CHEN Ying-wu SU Yan-gui |
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| Affiliation: | 1.Qinghai Institute of Forestry Research, Xining 810016, China; 2.Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | Soil microbiotic crusts are widespread in arid and semiarid regions, they are one of the major components of desert ecosystems, and their importance has been demonstrated by numerous researches. However, little research has been carried out on the relation between soil microbiotic crusts and the diversity of insect species. In this study, with the psammophilous Caragana Korshinskii-Artemisia ordosica communities on semifixed dunes and fixed dunes in Shapotou region at the southeastern fringe of the Tengger Desert as the observation sample plots, the survey quadrats were arranged in the vegetation community areas with different types and coverages of soil microbiotic crusts. The insects were surveyed in 100 m×100 m quadrats and caught by sampling frame and net-trap methods. The insects number was recorded and samples were collected for indoor identification. The surveyed results show that as compared to the uncovered vegetation area, the existence of soil microbiotic crusts in the Tengger Desert region significantly increases the diversity and abundance of insect species, especially the diversity and abundance in the quadrats mainly covered by moss and lichen crusts are significantly higher than those in the quadrats mainly covered by cyanobacteria and algal crusts. The contribution of soil microbiotic crusts to the diversity of insect species may be attributed to the facts that it stabilizes soil surface, improves soil environmental and there by provides suitable habitats and some food sources for the insects. |
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| Keywords: | soil microbiotic crusts Tengger Desert biodiversity desert insect |
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