Acta Agrestia Sinica ›› 2019, Vol. 27 ›› Issue (5): 1364-1369.DOI: 10.11733/j.issn.1007-0435.2019.05.031

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The Relationship Between the Abundance of the Locust and Caterpillar and the Grassland Plant Characteristics in Alpine Meadow in Gannan,China

SU Jun-hu1,2, XU Guo-cheng3, KANG Yu-kun1,2, JI Wei-hong2,4, LIU Chang-zhong1,2,5   

  1. 1. College of Grassland Science, Key Laboratory of Grassland Ecosystem(Ministry of Education), Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;
    2. Gansu Agricultural University-Massey University Research Centre for Grassland Biodiversity, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;
    3. Garssland Technology Extension Station of Gansu Province, Lanzhou, Gansu Province 730010, China;
    4. Institute of Natural and Mathematical Sciences, Massey University, 0632 Auckland, New Zealand;
    5. Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, College of Plant Protection, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China
  • Received:2019-03-25 Revised:2019-08-08 Online:2019-10-15 Published:2019-11-09

甘南高寒草甸蝗虫和毛虫的分布与植被群落的关系

苏军虎1,2, 许国成3, 康宇坤1,2, 纪维红2,4, 刘长仲1,2,5   

  1. 1. 甘肃农业大学草业学院/草业生态系统教育部重点实验室/中美草地畜牧业可持续发展研究中心, 甘肃 兰州, 730070;
    2. 甘肃农业大学-新西兰梅西大学草地生物多样性研究中心, 甘肃 兰州, 730070;
    3. 甘肃省草原技术推广总站, 甘肃 兰州, 730010;
    4. Institute of Natural and Mathematical Sciences, Massey University, 0632, Auckland New Zealand;
    5. 甘肃农业大学植物保护学院甘肃省农作物病虫害生物防治工程实验室, 甘肃 兰州, 730070
  • 通讯作者: 刘长仲
  • 作者简介:苏军虎(1981-),甘肃西和人,博士,副教授,主要从事草地生态与草地保护研究,E-mail:sujh@gsau.edu.cn
  • 基金资助:
    国家自然科学基金项目(31660522,31760706);甘肃省陇原青年创新创业人才团队项目;甘肃农业大学“伏羲杰出人才”项目(Gaufx-02J03)资助

Abstract: Chorthippus sp. and Gynaephora sp. are two dominate pests in the eastern alpine meadow of Qinghai Tibetan Plateau. This study is aimed to reveal the relationship between the abundance of the locust and caterpillar,the grassland plant characteristics and topographic factors and to verify their microhabitats characteristics. The density of locust and caterpillar was investigated by non-replaced samples every five days from May to September during 2010 to 2014 in alpine meadow of Xiahe,Gannan,eastern Qinghai Tibetan Plateau. The abundance,coverage and aboveground biomass (dry weight) of vegetation factors and topographic factors were measured,and their correlationship was analyzed. The results showed that there are significant correlations between the abundance of these two species and vegetation,as well as topographic factors. Locusts preferred flat and sunny middle slope,while caterpillar preferred flat only. The vegetation coverage was an important factor predicting the presence of locust. Areas with high biomass in flat area were more likely to be occupied by both species. The population dynamics of locusts is significantly related with plant coverage and biomass. The abundance of three plant species Koeleria glauca,Melissilus ruthenicus,Achnatherum splendens significantly affected habitat selection by locusts. The alpine grassland topographic factors and plant characteristics influences the locust and caterpillar both habitat use and habitat preferences.

Key words: Alpine meadow, Locust, Caterpillar, Distribution, Vegetation characteristics

摘要: 为探明甘南州夏河县高寒草甸草原蝗虫(Chorthippus sp.)和草原毛虫(Gynaephora sp.)的分布与其地形和植被因子的关系,本研究于2010年至2014年连续5年,定点选择30个样区,每年从5月至9月在各样地进行无放回取样调查密度,测量了植被的多度、盖度和地上生物量,并分析它们之间的相关性。结果表明:蝗虫选择分布在平地和半阳坡、坡中位的坡地,而毛虫只选择平地;植被盖度和地上生物量是影响草地蝗虫和毛虫分布的关键因子,与其种群密度呈显著的负相关关系;地上生物量较高的平地是蝗虫和毛虫共同分布的主要区域;洽草(Koeleria glauca)、花苜蓿(Melissilus ruthenicus)和芨芨草(Achnatherum splendens)3种植物多度与蝗虫分布显著相关,与毛虫分布不相关。可见,高寒草甸草原蝗虫和草原毛虫的分布与地形和植被因子显著相关,其栖息地利用特征有显著的偏好性。

关键词: 高寒草甸, 蝗虫, 毛虫, 分布, 植被特征

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