Abstract: By measuring the δ¹³C and δ¹⁵N ratios 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 δ¹³C and δ¹⁵N values 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 δ¹³C values of the animals in different habitats. The δ¹⁵N values 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.

Key words: wheat, lodging index, lignin., lodging resistance, hemicelluloses