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中国沙漠 ›› 2024, Vol. 44 ›› Issue (5): 163-169.DOI: 10.7522/j.issn.1000-694X.2024.00067

• • 上一篇    下一篇

围封沙冬青( Ammopiptanthus mongolicus )种群花部特征对传粉效率的影响

陈敏1(), 汪正蛟一1,2, 乔静娟1,2, 马旭君1   

  1. 1.中国科学院西北生态环境资源研究院 干旱区生态安全与可持续发展国家重点实验室/乌拉特荒漠草原研究站/甘肃省寒区旱区逆境生理与生态重点实验室,甘肃 兰州 730000
    2.中国科学院大学,北京 100049
  • 收稿日期:2024-05-23 修回日期:2024-07-18 出版日期:2024-09-20 发布日期:2024-10-15
  • 作者简介:陈敏(1986—),男,山东青岛人,副研究员,主要从事传粉生态学和植物适应性方面研究。E-mail: chenmin1360@126.com
  • 基金资助:
    中国科学院西部之光A类项目(E129050301)

Effect of floral traits on pollination efficiency of Ammopiptanthus mongolicus in enclosure

Min Chen1(), Zhengjiaoyi Wang1,2, Jingjuan Qiao1,2, Xujun Ma1   

  1. 1.Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands / Urat Desert-grassland Research Station / Key Laboratory of Stress Physiology and Ecology in Cold and Arid Region of Gansu Province,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2024-05-23 Revised:2024-07-18 Online:2024-09-20 Published:2024-10-15

摘要:

围栏封育后再适度利用是当前荒漠草原生态治理和种群恢复的重要措施,目前鲜有研究探讨围封对沙冬青(Ammopiptanthus mongolicus)种群传粉效率的影响。花部特征和虫媒传粉是陆地植物群落有性繁殖的重要组成部分,是传粉成功的重要影响因子。沙冬青是中国内蒙古荒漠区的重要灌木种群。为揭示围封状态下种群花部特征对种群传粉效率的影响机制,我们对围封样地和自然样地中沙冬青种群的花部结构、昆虫访花频率及行为、雌性适合度等进行观测。结果表明:围封样地中沙冬青的开花数显著高于对照样地,意大利蜂是重要访花昆虫;对照样地中沙冬青种群的花粉限制指数更高,即受到更严重的花粉限制。开花数与昆虫访花频率显著正相关,较高的昆虫访花频率能够显著促进沙冬青雌性适合度的增加。围封样地中沙冬青种群具有适应虫媒传粉的花部特征,种群较高的开花数目增加了昆虫访花频率,进而显著提高了种群传粉效率。围封处理有助于短时间内迅速提高荒漠草原沙冬青种群的有性繁殖效率。

关键词: 围封, 花部特征, 花粉限制, 访花频率, 雌性适合度

Abstract:

The appropriate utilization of enclosure is a crucial strategy for ecological management and population recovery in desert steppe ecosystems. Limited research has been conducted on the impact of enclosure on the pollination efficiency of Ammopiptanthus mongolicus. Floral traits and insect pollination play important roles in the sexual reproduction of terrestrial plant communities, exerting significant influence on pollination success. To elucidate the mechanism underlying floral traits' impact on pollination efficiency, we conducted observations on floral traits, pollinator visitation frequency and behavior, as well as female fitness of A. mongolicus in both enclosed and natural habitats. Our results revealed that the number of open flowers in the enclosed habitat was significantly higher than that in the natural habitat, with Apis mellifera being the predominant visitor. The pollen limitation index was higher in the natural habitat, indicating a more severe pollen limitation within this population. Additionally, a notable positive correlation was observed between the number of open flowers and pollinator visitation frequency, and increased pollinator visitation frequency significantly enhanced female fitness. Our founding suggested that plant populations within enclosed habitats exhibit floral traits adapted to insect pollination, leading to a higher number of open flowers which can elevate pollinator visitation frequency and subsequently enhance the pollination efficiency of A. mongolicus. Enclosure treatment proves beneficial for enhancing sexual reproduction efficiency of A. mongolicus in desert steppe.

Key words: enclosure, floral straits, pollen limitation, pollinator visitation frequency, female fitness

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