论文部分内容阅读
以海蜇为研究对象,通过模拟实验研究了海蜇降解过程对水体溶解氧和营养盐的影响。研究结果表明:海蜇降解显著消耗水体溶解氧,在降解的前3 d溶解氧消耗速率最快,实验水体海蜇量越多其溶解氧消耗就越大。海蜇降解向水体释放大量的DOC、NH4-N,且随实验海蜇量的增多其NH4-N释放量逐渐增加;5 kg组NH4-N最高浓度可达2 150μmol/L,为对照组的100倍;由于反硝化作用NO3-N、NO2-N的浓度随实验时间的增加浓度逐渐降低,至第3 d其浓度降低至未检出。海蜇降解也向水体释放PO4-P和SiO3-Si,且随实验水体海蜇量的增多其PO4-P和SiO3-Si释放量逐渐增加,但SiO3-Si增加幅度较小。降解产物中N/P值较高,最高值高达1 707,平均值为195。水母大量暴发会对海洋生态系统产生重大影响。
Taking jellyfish as research object, the effects of degradation process of jellyfish on dissolved oxygen and nutrients in water were studied through simulation experiments. The results showed that the degradation of jellyfish significantly consume dissolved oxygen, the fastest dissolved oxygen consumption in the first 3 days of degradation, and the greater the consumption of dissolved oxygen in experimental water jellyfish. The degradation of jellyfish released a large amount of DOC and NH4-N into the water, and the release of NH4-N gradually increased with the increase of experimental jellyfish. The highest concentration of NH4-N in 5 kg group was 2 150μmol / L, which was 100 times that of the control group The concentrations of NO3-N and NO2-N gradually decreased with the increase of experimental time. The concentrations of NO3-N and NO2-N decreased to undetected on the 3rd day. The degradation of jellyfish also released PO4-P and SiO3-Si to water bodies. With the increase of experimental jellyfish, the release of PO4-P and SiO3-Si gradually increased, but the increase of SiO3-Si was smaller. Degradation products in the N / P value is high, the highest value of up to 1 707, with an average of 195. Massive jellyfish outbreaks can have a major impact on marine ecosystems.