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草业学报 ›› 2021, Vol. 30 ›› Issue (8): 137-145.DOI: 10.11686/cyxb2020296

• 研究论文 • 上一篇    

绢蒿荒漠粪甲虫多样性特征及其对粪便内种子的二次分配

曹佳敏1(), 郭亚亚1, 李娜娜1, 孙海荣1, 车昭碧1, 鲁为华1,2()   

  1. 1.石河子大学动物科技学院,新疆 石河子 832003
    2.省部共建绵羊遗传改良与健康养殖国家重点实验室,新疆 石河子 832003
  • 收稿日期:2020-06-29 修回日期:2020-08-19 出版日期:2021-07-09 发布日期:2021-07-09
  • 通讯作者: 鲁为华
  • 作者简介:Corresponding author. E-mail: winnerlwh@sina.com
    曹佳敏(1995-),女,新疆伊犁人,在读硕士。E-mail: 1055262387@qq.com
  • 基金资助:
    国家自然科学基金(31860667);省部共建绵羊遗传改良与健康养殖国家重点实验室优秀中青年人才培养引导计划专项(SKLSGIHP2016A03)

Diversity characteristics of dung beetle of Seirphidium semidesert and its secondary distribution of seeds in the feces

Jia-min CAO1(), Ya-ya GUO1, Na-na LI1, Hai-rong SUN1, Zhao-bi CHE1, Wei-hua LU1,2()   

  1. 1.College of Animal Science and Technology,Shihezi University,Shihezi 832003,China
    2.State Key Laboratory of Sheep Genetic Improvement and Healthy Production,Shihezi 832003,China
  • Received:2020-06-29 Revised:2020-08-19 Online:2021-07-09 Published:2021-07-09
  • Contact: Wei-hua LU

摘要:

石河子紫泥泉种羊场的典型绢蒿荒漠放牧地作为重要的春秋牧场,承担两季的放牧压力,粪甲虫的活动会对粪便内的种子进行二次传播,此行为对草地植被恢复具有重要意义,为研究粪甲虫对粪便内不同尺寸种子水平、垂直传播距离,确定绢蒿荒漠中粪甲虫的季节性变化及物种多样性特征,于2019年4-10月,在石河子紫泥泉种羊场的典型绢蒿荒漠放牧地牛粪中采集到食粪昆虫14797头,其中捕获粪甲虫分属3科17种,蜉金龟科9种、金龟科7种、粪金龟科1种。6月物种丰富度最高,优势种为红亮蜉金龟。10月个体数量最大,优势种为直蜉金龟。在6和10月进行粪甲虫进驻粪便行为观察试验,结果显示6月粪便放置8 h粪甲虫数量到达高峰,10月粪便放置4 h粪甲虫数量到达高峰。随着粪甲虫进驻粪便时间的延长和数量的增加,粪便分解程度不断提高。粪甲虫对粪便中种子的分配与种子大小有关。以小(1.3 mm)、中(3.6 mm)、大(5.8 mm)3种尺寸的珠子作为种子模拟物。结果显示,80%的种子模拟物被埋藏在水平距离20 cm以内及0~10 cm的土壤深度中。有20%的种子模拟物被粪甲虫埋藏到10 cm以下或移动到水平范围20 cm以外。随着种子模拟物大小的增加,埋入种子模拟物的比例逐渐降低。研究结果显示粪甲虫对粪便内种子的二次传播有助于绢蒿荒漠的生态恢复。

关键词: 绢蒿荒漠, 粪甲虫, 种子埋藏, 二次传播

Abstract:

Seriphidium semidesert grassland provides important spring and autumn pasture for sheep grazing in Xinjiang Province in China. The activities of dung beetles provide a mechanism of seed dispersal, which is of great significance for the restoration of grassland vegetation. The objectives of this study were to explore the horizontal and vertical displacement distances of seeds of different sizes in dung, resulting from the activities of dung beetles and to determine the seasonal changes in species diversity characteristics of dung beetles in the Seriphidium semidesert grassland. A total of 14797 dung-eating insects were captured, belonging to 17 species and 3 families, among which there were 9 species from the family Aphodiidae, 7 species of the family Scarabaeidae, 1 species of the family Geotrupidae. Diversity analysis demonstrated that the species richness index was highest in June at which time the dominant species is Aphodius impunctatus, whilethe largest number of individuals occurred in October at which time the dominant species is A. rectus. Observation of dung beetle behavior in June and October showed that in June the number of dung beetles reached a peak 8 hours after dung placement and in October 4 hours after dung placement. Over time after dung placement, the number of feces-eating insects entering the dung, and the degree of dung decomposition progressively increased. The distribution of seeds in dung by dung beetles depends on the size of the seeds. Three sizes of beads, small (1.3 mm), medium (3.6 mm), and large (5.8 mm), were used as artificial seeds to evaluate seed movement by dung beetles. It was found that about 80% of the artificial seeds were buried within a horizontal distance of 20 cm and to a soil depth in the range of 0-10 cm. Conversely, 20% of the seed simulants were moved beyond a horizontal range of 20 cm or buried below 10 cm by dung beetles. With larger-sized artificial seeds, the proportion that were buried decreased. The results of the study showed that the secondary dispersal by dung beetles of seeds in feces contributes to the ecological restoration of the Seriphidium semidesert grassland.

Key words: Seirphidium semidesert, dung beetle, seed buried, secondary dispersal