氮素输入和刈割对草甸草原植食性昆虫多度和物种丰富度的影响

doi:10.13287/j.1001-9332.202307.009

应用生态学报 ›› 2023, Vol. 34 ›› Issue (7): 1975-1980.doi: 10.13287/j.1001-9332.202307.009

氮素输入和刈割对草甸草原植食性昆虫多度和物种丰富度的影响

吴远秀^1,2, 刘婧桐^1,2, 丁聪², 张炳川², 梁潇洒², 宁宇², 殷江霞^1*, 吕晓涛²

¹辽宁大学生命科学院, 沈阳 110036;
²中国科学院沈阳应用生态研究所, 沈阳 110016

收稿日期:2023-04-10 接受日期:2023-05-18 出版日期:2023-07-15 发布日期:2024-01-15
通讯作者: *E-mail: xia0615@126.com
作者简介:吴远秀, 女, 1998年生, 硕士研究生。主要从事草地昆虫生态学研究。E-mail: wyx15563572097@163.com
基金资助:
国家重点研发计划项目(2022YFF1300603)

Effects of nitrogen inputs and mowing on the abundance and species richness of herbivorous insects in a meadow steppe

WU Yuanxiu^1,2, LIU Jingtong^1,2, DING Cong², ZHANG Bingchuan², LIANG Xiaosa², NING Yu², YIN Jiangxia^1*, LV Xiaotao²

¹School of Life Sciences, Liaoning University, Shenyang 110036, China;
²Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China

Received:2023-04-10 Accepted:2023-05-18 Online:2023-07-15 Published:2024-01-15

摘要/Abstract

摘要： 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。

关键词: 氮添加, 刈割, 草地, 昆虫群落, 多度, 丰富度

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.

Key words: nitrogen addition, mowing, grassland, insect community, abundance, richness

吴远秀, 刘婧桐, 丁聪, 张炳川, 梁潇洒, 宁宇, 殷江霞, 吕晓涛. 氮素输入和刈割对草甸草原植食性昆虫多度和物种丰富度的影响[J]. 应用生态学报, 2023, 34(7): 1975-1980.

WU Yuanxiu, LIU Jingtong, DING Cong, ZHANG Bingchuan, LIANG Xiaosa, NING Yu, YIN Jiangxia, LV Xiaotao. Effects of nitrogen inputs and mowing on the abundance and species richness of herbivorous insects in a meadow steppe[J]. Chinese Journal of Applied Ecology, 2023, 34(7): 1975-1980.

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氮素输入和刈割对草甸草原植食性昆虫多度和物种丰富度的影响

Effects of nitrogen inputs and mowing on the abundance and species richness of herbivorous insects in a meadow steppe

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