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银川芦花台湿地昆虫群落营养结构及稳定性

杨贵军1**,王新谱2   

  1. (1宁夏大学生命科学学院, 银川 750021; 2宁夏大学农学院, 银川 750021)
  • 出版日期:2013-12-10 发布日期:2013-12-10

Nutritional structure and stability of insect community in Luhuatai wetland of Yinchuan, Ningxia of Northwest China.

YANG Gui-jun1**, WANG Xin-pu2   

  1. (1School of Life Science, Ningxia University, Yinchuan 750021, China; 2School of Agriculture, Ningxia University, Yinchuan 750021, China)
  • Online:2013-12-10 Published:2013-12-10

摘要:

2010年5—10月,对银川市芦花台湿地昆虫群落组成和结构变化进行了调查,共采集昆虫10578只,隶属12目70科217种。根据营养水平和取食关系归为3个营养层(基位物种、中位物种和顶位物种)和7个功能团,分析了昆虫群落的物种、功能团和营养层多样性的时序动态及群落稳定性。结果表明,食花芽类昆虫、刺吸类昆虫和中性昆虫为昆虫群落的优势功能团,个体数量分别占总数量的16.01%、32.35%和33.33%;优势类群为蚜科和摇蚊科昆虫,个体数量分别占总数量的10.57%和21.27%。在不同季节,昆虫群落营养层丰富度表现出基位物种>中位物种>顶位物种的规律,不同功能集团的优势类群丰富度随季节变化明显。物种多样性、营养层多样性与功能团多样性之间的相关性均达到极显著水平(P<0.01),变化趋势一致。不同月份昆虫群落的相对稳定性波动较大,但随季节演替时序分明,恢复力稳定性较强。
 

关键词: 摄食习性, 稳定同位素, 褐菖鲉, 马鞍列岛, 海洋牧场

Abstract: In May-October, 2010, an investigation was conducted on the composition and nutritional structure of insect community in Luhuatai wetland of Yinchuan, Ningxia. A total of 10578 insect individuals were collected, belonging to 217 species, 70 families, and 12 orders. According to the trophic level and feeding mode, three nutritional classes and seven functional groups were established. The temporal dynamics of the diversity in species, functional group, and nutritional class and the insect community stability were analyzed. The bud-eating insects, piercing-sucking insects, and neutral insects were the dominant functional groups in the insect community, accounting for 16.01%, 32.35%, and 33.33% of the total individuals, respectively. The dominant insect groups were aphids and chironomids, and their individual numbers occupied 10.57% and 21.27% of the total, respectively. In different seasons, the basal species of the insect community had the highest abundance, followed by the intermediate species, and the top species. The abundance of the dominant insect groups of different functional groups changed obviously with season. The species diversity and nutritional class diversity had significant correlations with the functional group diversity (P<0.01), and the functional group biodiversity and nutritional class diversity had the similar temporal variation trend as the species biodiversity. The relative stability of the insect community exhibited greater fluctuation during the period of this investigation, but the recovery stability became stronger with the seasonal succession.

Key words: stable isotope, Sebastiscus marmoratus, marine ranching, Ma’an Archipelago., feeding habit