These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Effects of nitrogen inputs and mowing on the abundance and species richness of herbivorous insects in a meadow steppe.
    Author: Wu YX, Liu JT, Ding C, Zhang BC, Liang XS, Ning Y, Yin JX, Lv XT.
    Journal: Ying Yong Sheng Tai Xue Bao; 2023 Jul; 34(7):1975-1980. PubMed ID: 37694482.
    Abstract:
    To reveal the effects of nitrogen (N) inputs and mowing on the abundance and richness of insect community in meadow steppe, we investigated the abundance and diversity of herbivorous insects under four treatments in Inner Mongolia meadow steppe in August 2022, including control, N addition, mowing, and combined N addition and mowing. At a long-term control experimental platform, we collected insects using the vacuum sampling method. The results showed that N addition significantly increased the abundance of herbivorous insects, and mowing significantly decreased the abundance of herbivorous insects. Nitrogen addition significantly increased insect abundance in unmown condition but not in the mown condition. The responses of insect abundance at the community level to N addition were mainly driven by the dominant groups, Cicadellidae and Lygaeidae, which was affected by the abundance of Gramineae species. In contrast, their responses to mowing were the opposite. Both N addition and mowing did not affect the diversity of herbivorous insects. Our results indicated that the responses of herbivorous insect abundance to N inputs and mowing were directly regulated by food resources. With increasing food resource availability, the abundance but not the diversity of herbivorous insects increased, with stronger responses of dominant groups than subordinate ones. 为了揭示氮素输入和刈割2种管理措施对草甸草原中昆虫群落多度和丰富度的影响,本研究基于长期控制实验平台,于2022年8月采用抽吸取样法调查对照、氮素添加、刈割以及氮素添加和刈割交互作用4种处理下内蒙古草甸草原植食性昆虫多度和多样性变化。结果表明: 氮素添加显著增加植食性昆虫群落多度,刈割显著降低植食性昆虫群落多度;在不刈割条件下,氮素添加对昆虫多度具有促进作用,而在刈割条件下作用不显著。氮素添加导致由禾本科植物多度增加介导的优势类群叶蝉科和长蝽科多度增加,进而增加了昆虫群落多度,刈割则恰好相反。氮素添加、刈割及其交互作用均不影响植食性昆虫的多样性。上述结果表明,植食性昆虫的多度受食物资源的直接调控,当资源可用性增多时,其数量会相应增加,且优势昆虫类群对资源变化的响应更为强烈。.
    [Abstract] [Full Text] [Related] [New Search]