绿潮硬毛藻分解对天鹅湖水体氮磷水平的影响

发布时间：2018-03-11 14:17

本文选题：硬毛藻分解　切入点：上覆水体　出处：《环境科学研究》2017年05期 　论文类型：期刊论文

【摘要】：为了解绿潮硬毛藻衰亡分解对上覆水体营养水平的影响,以荣成天鹅湖不同湖区的沉积物和暴发的硬毛藻为试材,通过室内模拟研究了藻类分解过程中水体氮磷水平及理化性质的变化,并评价了不同湖区沉积物中氮磷的释放潜力.结果表明:硬毛藻衰亡分解使上覆水体中ρ(TN)和ρ(NH_4~+-N)均明显上升,并且前期(0~16 d)上升较快,ρ(TN)和ρ(NH_4~+-N)最高分别可达12.40和7.98 mg/L;水体中ρ(TP)和ρ(SRP)表现为前期变化不大,19 d后大幅增加,含量变幅分别为0.02~1.14和0.01~0.40 mg/L.在试验中后期(约16 d后),不同湖区沉积物处理的水体中ρ(TN)、ρ(NH_4~+-N)、ρ(TP)、ρ(SRP)均表现为有沉积物含藻处理无沉积物含藻处理有沉积物无藻处理.在藻分解的条件下,不同湖区沉积物的氮磷释放能力存在很大差异,氮释放量的顺序为湖中心西北部南部,而磷表现为西北部湖中心南部.在硬毛藻绿潮的衰亡阶段,由于初期藻体营养盐的直接释放和后期促进沉积物内源释放的间接影响,水体中ρ(TN)和ρ(TP)均明显增加,进而加重了天鹅湖水体的富营养化水平.
[Abstract]:In order to understand the effect of the decaying decomposition of Chlorophyta on the nutrient level of the overlying water, the sediments of Rongcheng Lake in different lakes and the outbreak of Chlorophyta were used as the test material. The changes of nitrogen and phosphorus levels and physicochemical properties of water during algae decomposition were studied by laboratory simulation. The release potential of nitrogen and phosphorus in sediments of different lakes was evaluated. The results showed that the decaying decomposition of Chlorophyta caused the increase of 蟻 ~ (-N) and 蟻 ~ (NH _ 4 ~ -N) in overlying water. The peak values of 蟻 ~ (-N) and 蟻 ~ (-N) reached 12.40 and 7.98 mg / L, respectively, and 蟻 _ (TPN) and 蟻 ~ (-SRP) in water increased significantly after 19 d. The variation ranges of the contents were 0.02 ~ 1.14 and 0.01 ~ 0. 40 mg / L, respectively. In the middle and late period of the experiment (about 16 days later), 蟻 ~ (-), 蟻 ~ (NH _ 4 ~ -NN), 蟻 ~ (?) _ (TPN), 蟻 ~ ((1)), (~ (1)) ~ (1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) C ~ (-1) in the sediments of different lake sediments treated with sediment, were all shown as follows: there was no algal treatment with sediment, and no algal treatment with. The nitrogen and phosphorus release capacity of sediments in different lakes is very different. The order of nitrogen release is the south of the northwest of the lake center, and the phosphorus is the south of the northwestern lake. As a result of the direct release of algae nutrients and the indirect effect of promoting the endogenous release of sediments in the later stage, the concentrations of 蟻 (TNN) and 蟻 (TPN) in water increased significantly, which aggravated the eutrophication level of Swan Lake.
【作者单位】：烟台大学海洋学院;烟台大学生命科学学院;中国科学院烟台海岸带研究所;
【基金】：国家自然科学基金项目(41273130,41573120) 烟台大学研究生科技创新基金项目(YDZD1615)
【分类号】：X173;X524

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