摘要
以宁夏荒漠草原 1 2种蝗虫为对象 ,对荒漠草原蝗虫的营养生态位和种间食物竞争模型进行了研究 .采用嗉囊内含物分析技术分析了 1 2种蝗虫的取食特性和食物利用谱 ,并根据嗉囊内含物的分析结果 ,定量研究了蝗虫的营养生态位重叠和宽度 .依据生态位分化的特点 ,1 2种蝗虫可划分为 4个不同营养需求类群 :杂草取食者、杂草 禾草取食者、禾草 杂草取食者、禾草取食者 .通过蝗虫的取食频率、生物量以及种群密度 ,提出了蝗虫种间食物竞争力评估模型 ,对 1 2种蝗虫种间食物竞争的作用力进行了讨论 .
The trophic niche and interspecific food competitive model of 12 grasshopper species in Ningxia desert grassland were studied.Microscopic examination of crop contents was used to analyze the food preference and food utilization menu to determine the overlap and breadths of trophic niches among these grasshopper species.On the basis of the differentiation characteristics of ecological niches,the 12 grasshopper species were divided into 4 trophic demanded groups:forbivorous,mixed forbivorous,mixed graminivorous,and mixotrophicus species.A new model to evaluate the interspecific food competition was proposed by combining feeding frequency,biomass and population density of grasshopper,and the interspecific food competitive interactions among 12 grasshopper species were discussed.
出处
《应用生态学报》
CAS
CSCD
1997年第6期605-611,共7页
Chinese Journal of Applied Ecology
基金
国家自然科学基金资助项目!( 3 9560 0 1 8)
关键词
蝗虫
草原蝗虫
营养生态位
种间食物竞争
模型
Grassland grasshopper,Tropic niche,Food selection,Competitive evaluation, Grassland ecosystem.
