首页 | 本学科首页   官方微博 | 高级检索  
     


Nitrogen fixation by cyanobacteria stimulates production in Baltic food webs
Authors:Agnes M. L. Karlson  Jon Duberg  Nisha H. Motwani  Hedvig Hogfors  Isabell Klawonn  Helle Ploug  Jennie Barthel Svedén  Andrius Garbaras  Brita Sundelin  Susanna Hajdu  Ulf Larsson  Ragnar Elmgren  Elena Gorokhova
Affiliation:1.Department of Environmental Science and Analytical Chemistry,Stockholm University,Stockholm,Sweden;2.Department of Ecology, Environment and Plant Sciences,Stockholm University,Stockholm,Sweden;3.AquaBiota Water Research,Stockholm,Sweden;4.Department of Biology and Environmental Sciences,University of Gothenburg,Gothenburg,Sweden;5.Mass Spectrometry Laboratory,Center for Physical Sciences and Technology,Vilnius,Lithuania
Abstract:Filamentous, nitrogen-fixing cyanobacteria form extensive summer blooms in the Baltic Sea. Their ability to fix dissolved N2 allows cyanobacteria to circumvent the general summer nitrogen limitation, while also generating a supply of novel bioavailable nitrogen for the food web. However, the fate of the nitrogen fixed by cyanobacteria remains unresolved, as does its importance for secondary production in the Baltic Sea. Here, we synthesize recent experimental and field studies providing strong empirical evidence that cyanobacterial nitrogen is efficiently assimilated and transferred in Baltic food webs via two major pathways: directly by grazing on fresh or decaying cyanobacteria and indirectly through the uptake by other phytoplankton and microbes of bioavailable nitrogen exuded from cyanobacterial cells. This information is an essential step toward guiding nutrient management to minimize noxious blooms without overly reducing secondary production, and ultimately most probably fish production in the Baltic Sea.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号