底栖鞘丝藻对沉积物磷释放的影响研究
Study on effects of Leptolyngbya sp. on phosphorus release in sediments
投稿时间:2020-09-23  修订日期:2020-11-09
DOI:
中文关键词: 沉积物  底栖藻类  水体理化因子  磷形态  磷释放
英文关键词: sediment  benthic algae  water physical and chemical factors  phosphorus form  phosphorus release
基金项目:国家自然科学基金资助项目(No.30970550),中央高校基本科研业务专项基金资助项目(No.CZY20002)
作者单位E-mail
胡俊杰 中南民族大学 生命科学学院 1984669411@qq.com 
王涛 中南民族大学 生命科学学院  
谢纯林 中南民族大学 生命科学学院  
裴国凤 中南民族大学 生命科学学院 peigf@mail.scuec.edu.cn 
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中文摘要:
      以底栖鞘丝藻为研究对象,利用室内“上覆水体(富营养和寡营养型)-底栖鞘丝藻生物膜(有和无)-沉积物”培养系统,测定了各处理组水体的理化因子、磷浓度,底栖鞘丝藻生物膜与沉积物的磷形态组成及含量。结果表明不同营养型水体中底栖鞘丝藻生物膜的磷形态组成及其滞留磷的能力明显不同,60 d后,寡营养水体中底栖鞘丝藻生物膜的总磷浓度为3.75 mg·g-1(干重),以NH4Cl-P(占总磷42.76%)和Fe/Al-P(占总磷48.28%)为主,富营养水体中,以Fe/Al-P(占总磷56.91%)为主,总磷浓度是1.24 mg·g-1。结论:底栖鞘丝藻生物膜能够有效滞留水体中的磷和减缓富营养水体中沉积物磷的释放;同时,水体营养水平不仅影响底栖鞘丝藻生物膜的磷形态组成及其磷滞留能力,而且影响沉积物的磷释放,富营养水体中沉积物磷释放更加缓慢。
英文摘要:
      Selecting?Leptolyngbya sp. as?the?research?object, the indoor simulation experiments of overlying water(eutrophic or oligotrophic water)-Leptolyngbya sp.(with or without)-sediments were conducted to determine the water physical and chemical factors, phosphorus concentration in overlying water, the phosphorus fractions and the total phosphorus content of Leptolyngbya sp. and sediments. Results showed that the phosphorus form and the ability of phosphorus retention of Leptolyngbya sp. were various in different nutrient water. After 60 days, in the oligotrophic water, the main phosphorus forms of Leptolyngbya sp. were NH4Cl-P (42.76%) and Fe/Al-P (48.28%), and its total phosphorus concentration was 3.75 mg·g-1. In the eutrophic water, the main phosphorus form of Leptolyngbya sp. was Fe/Al-P (56.91%), and its total phosphorus concentration was 1.24 mg·g-1. Conclusion:Because of Leptolyngbya sp., phosphorus concentration in overlying water was reduced effectively, slowing phosphorus release from sediments to eutrophic water. In addition, water tropic status not only affected the phosphorus forms and the ability of phosphorus retention of Leptolyngbya sp., but also influenced phosphorus release from sediments to overlying water. Especially in eutrophic water, the rate of phosphorus release was slower .
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