The carbon and nitrogen stable isotope compositions of the sediment organic matter, fish feed and fish feces were measured to assess the impact of the aquaculture waste from the cage fish farm in Poyang Lake. The results provide evidence of the non-negligible effect of aquaculture waste on the sediment organic matter. The δ¹³C and δ¹⁵N of sediments varied from − 27.62 to − 25.66‰ and 4.83 to 6.92‰, respectively. The sediment organic matter had a mixed source of waste feed, fish feces and plankton. The average contribution ratio of waste feed and fish feces was 53.1% and 24.6%, respectively. The aquaculture derived organic matter ratio was high with ranging from 57.6 to 95.6%. The aquaculture waste seemed to disperse widely enough to influence the study site about 2.5 km distance from the cage. The dispersion and resuspension were the main two factors which can explain the great effect area found in this study.

测量了沉积物有机物，鱼饲料和鱼粪中碳和氮的稳定同位素组成，以评估Po阳湖网箱养鱼场的水产养殖废物的影响。结果提供了水产养殖废物对沉积物有机物不可忽视的影响的证据。的δ ¹³ C和δ ¹⁵沉积物N分别为− 27.62至− 25.66‰和4.83至6.92‰。沉积物有机物是废物，鱼粪和浮游生物的混合来源。废物饲料和鱼粪的平均贡献率分别为53.1％和24.6％。水产养殖衍生的有机物比例很高，介于57.6至95.6％之间。水产养殖废物似乎分散得足够广泛，从而影响了距网箱约2.5公里的研究地点。分散和再悬浮是可以解释本研究中发现的巨大影响区域的两个主要因素。