冶金区节肢动物碳、氮稳定同位素组成及营养级关系

Carbon and nitrogen stable isotopes composition and its relationships with trophic levels of arthropods in smelting areas

通过测定辽宁省葫芦岛锌厂不同生境植物和主要消费者的碳、氮稳定同位素比值,研究冶金区不同消费者碳、氮稳定同位素组成及不同消费者之间的关系。结果表明:节肢动物δ13C、δ15N值的变化范围分别为-12.61‰～-29.63‰、1.73‰～9.94‰,变化幅度较大。研究区植物以C3植物居多,导致不同群落生境动物δ13C值较低;螳螂、蜘蛛δ15N比值高于其他动物;通过营养级模型计算可知不同消费者之间的关系,蝗虫、蚱蜢等草食性动物形成第二营养级,即初级消费者;第三营养级包括蜘蛛、螳螂,为次级消费者。

By measuring the δ^13Cand δ^15Nratios of plants and their main consumers in different habitats of Huludao Zinc Plant, Liaoning Province of Northeast China, this paper studied the relationships between the carbon and nitrogen stable isotopes composition of different consumers and the consumers. In the study area, the δ^13Cand δ^15Nvalues of arthropods had a greater variation range, being -12.61‰--29.63‰ and 1.73‰-9.94‰, respectively. The C3 plants were dominant, which led to the lower δ^13Cvalues of the animals in different habitats. The δ^15Nvalues of Argiope bruennichii and Paraten odera sinensis were higher than those of the other animals. According to the trophic model, herbivores （Locusta migratoria manilensis and Acrida chinensis） were at the second trophic level, i.e., the primary consumers, whereas A. bruennichii and P. odera sinensis were at the third trophic level, i.e., the secondary consumers.