兽类学报

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内蒙古典型草原布氏田鼠营养生态位及其种间关系

岳 闯1 郭乾伟1 张卓然2 李鑫1 满都呼1 袁帅1 付和平1,3 武晓东1 金国4 刘建文5 李永善5   

  1. (1 内蒙古农业大学草原与资源环境学院,呼和浩特 010011)(2 内蒙古自治区草原工作站,呼和浩特,010020)(3 内蒙古农业大学生命科学学院,呼和浩特010011)(4 内蒙古自治区锡林郭勒盟东乌珠穆沁旗草原工作站,东乌珠穆沁旗  026300)(5 内蒙古阿拉善盟孪井滩气象站,阿拉善  750312)
  • 出版日期:2020-09-30 发布日期:2020-09-27
  • 通讯作者: 付和平 E-mail: fuheping@126.com;武晓东 E-mail: wuxiaodong_hgb@163.com
  • 基金资助:
    国家自然科学基金(31772667,31560669,31602003);内蒙古自然科学基金(2019MS03012,2018MS03014);内蒙古自治区科技计划资助项目(201702116);内蒙古自治区高等学校科学研究项目(NJZZ17055)

Trophic niche of Brandt’s voles (Lasiopodomys brandtii) and their interspecific relationships with other common rodents in a typical steppe, Inner Mongolia

YUE Chuang1, GUO Qianwei1, ZHANG Zhuoran2, LI Xin1, MAN Duhu1, YUAN Shuai1, FU Heping 1,3, WU Xiaodong1, JIN Guo4, LIU Jianwen5, LI Yongshan5#br#   

  1. (1 College of Grassland, Resources and Environment, Inner Mongolia Agriculture University, Hohhot 010011, China)
    (2 Inner Mongolia Autonomous Region Grassland Work Station, Hohhot 010020, China)
    (3 College of Life Sciences Inner Mongolia Agricultural University, Hohhot 010011, China)
    (4 Inner Mongolia East Wuzhumuqiqi Grassland Work Station, Dongwu Zhumuqin Banner 026300, China)
    (5 Weather Station of Luanjingtan in Alashan League, Inner Mongolia, Alashan, Inner Mongolia 750300, China)
  • Online:2020-09-30 Published:2020-09-27

摘要: 研究啮齿动物营养生态位不仅可以了解啮齿动物在生态系统中所占据的营养层,而且可以揭示啮齿动物不同生长发育时期的主要食物来源及变化,通过分析营养生态位的特征及变化,可以探讨多种啮齿动物的种间关系。本研究于2018年7月,在内蒙古典型草原采用铗日法捕获啮齿动物标本4种81只,应用稳定性13C、15N同位素技术对布氏田鼠(Lasiopodomys brandtii)营养生态位及其与达乌尔黄鼠(Spermophilus dauricus)、黑线毛足鼠(Phodopus sungorus)、五趾跳鼠(Allactaga sibirica)的种间关系进行研究。结果表明:(1)布氏田鼠不同年龄组骨骼组织营养生态位宽度即稳定同位素贝叶斯标准椭圆面积,Ⅲ龄组最高(0.802‰2),Ⅱ龄组次之(0.699‰2),Ⅳ龄组最低(0.666‰2),3个年龄组之间营养生态位共同重叠面积为0.064‰2,其共同食物源仅占不到10%;(2)布氏田鼠无论是长期食性或短期食性,与另外3种均不存在食物源竞争,但布氏田鼠生态位宽度较窄对食物的选择性较强,因此一旦食物源成分改变不再适于该鼠,布氏田鼠种群极有可能面临食物源短缺,种群迁移可能是最直接的选择。

关键词: 布氏田鼠, 稳定同位素, 营养生态位, 种群, 贝叶斯椭圆

Abstract: By studying the trophic niche of rodents, we can not only understand the nutrient layer occupied by rodents in the ecosystem, but also reveal their main food sources and their relationships with changes observed in rodents at different growth and development periods. In this study, 81 rodent specimens of 4 species were captured using the snap-trapping method in typical grasslands of Inner Mongolia in July 2018. The trophic niche of Brandt’s voles (Lasiopodomys brandtii) and their interspecific relationship with other three common rodents, i.e., Spermophilus dauricus, Phodopus sungorus and Allactaga sibirica, were analyzed using 13C and 15N stability isotope techniques. We found a marked age-specific trophic niche in the width of bone tissue in Brandt’s voles, i.e., the Ⅲ age group had the widest with 0.802 ‰2 Bayesian standard ellipse area,  followed by the Ⅱ age group with 0.699 ‰2 ellipse area, and the lowest in the Ⅳ age group with 0.666 ‰2.  The trophic niche overlap commonality area among the three age groups was 0.064 ‰2, and common food sources accounted for less than 10% of all food sources. Moreover, we did not find that Brandt's voles competed for food sources with the other three rodents in either the short-term or long-term diet. However, compared with the other three rodent species, the niche width of Brandt's voles was narrower and its food selectivity was stronger. These findings suggest that if food source composition changed and was no longer suitable for Brandt's voles in their habitat, the vole might face food shortage and emigration would be a direct and favorable strategy for the development of the voles’ population.

Key words: Brandt’s vole, Stable isotope, Nutritional niche, Population, Bayesian ellipse