| 草原蝗虫营养生态位的研究* |
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| 引用本文： | 康乐,陈永林.草原蝗虫营养生态位的研究*[J].昆虫学报,1994,37(2):178-189. |
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| 作者姓名： | 康乐 陈永林 |
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| 作者单位： | 中国科学院动物研究所 |
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| 基金项目： | 中国科学院“八五”重点研究项目 |
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| 摘 要： | 本文采用嗉囊内含物显微分析技术系统地研究了内蒙古典型草原蝗虫的选食特性和食物利用诺。根据11种蝗虫嗉囊内含物分析的结果，定量地研究了蝗虫的营养生态位以及生态位的重叠和宽度。11-种蝗虫依据生态位分化的特点，被划分为5个不同的营养需求类群：禾草取食者、禾草-杂草取食者、杂草-禾草取食者、杂草取食者和杂食者。作者通过对蝗虫食性及生物量的研究，提出了蝗虫潜在严重值和实际严重值的概念和计算方法，也就蝗虫在草原生态系统中的相互作用关系及共存关系进行了讨论。
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| 关 键 词： | 蝗虫 生态位 食性选择 资源利用和分化 草原生态系统 |
TROPHIC NICHE OF GRASSHOPPERS WITHIN STEPPEECOSYSTEM IN INNER MONGOLIA |
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| KANG LE, CHEN YONG LI.TROPHIC NICHE OF GRASSHOPPERS WITHIN STEPPEECOSYSTEM IN INNER MONGOLIA[J].Acta Entomologica Sinica,1994,37(2):178-189. |
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| Authors: | KANG LE CHEN YONG LI |
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| Abstract: | icroscopic examination of crop contents was used to determine the food preference of grasshoppers on typical steppe in Inner Mongolia. Results from the dietary analysis of 11 grasshopper species (Table 1) showed that 31 species of vascularplants, a species of fungus and mites were served as food sources (Table 3). Theoverlaps and breadths of trophic niches among these grasshopper species were studiedby methods of popular indices (Table 2 & 4). On the basis of partition in utilization of food resources, the 11 grasshopper species were divided into 5 groups by thePrincipal Component Analysis: graminivorous, mixed graminivorous, mixed forbivorous, forbivorous and phytocarnivorous species (Fig. 1 ). The authors proposed anew concept and methods for measurement of potential and realized serious valuesof grasshopper species by combining average biomass of individual and realized biomass of population of grasshopper with their plant value indices. The concept andmethods are very useful for the evaluation of economic importance of the grasshopper species in this region. The coexisted relationships among these grasshopperspecies within the ecosystem of typical steppe are discussed. |
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| Keywords: | Grasshopper-niche-food selection-utilization and partition of food resources-grassland ecosystem |
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