DOI: 10.1016/j.watres.2018.11.003
Scopus记录号: 2-s2.0-85056545292
论文题名: Interactions between suspended particulate matter and algal cells contributed to the reconstruction of phytoplankton communities in turbulent waters
作者: Kang L. ; He Y. ; Dai L. ; He Q. ; Ai H. ; Yang G. ; Liu M. ; Jiang W. ; Li H.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 251
结束页码: 262
语种: 英语
英文关键词: Phytoplankton
; Succession
; Suspended particulate matter
; Turbulence
; Turbulent dissipation rate
Scopus关键词: Turbulence
; Extracellular polymeric substances
; Homogeneous turbulence
; Phytoplankton community
; Phytoplankton densities
; Succession
; Suspended particulate matters
; Turbulence dissipation rate
; Turbulent dissipation rates
; Phytoplankton
; alga
; algal community
; behavioral response
; cell
; community response
; environmental effect
; growth
; phytoplankton
; reconstruction
; succession
; suspended particulate matter
; turbulence
; article
; forecasting
; human
; nonhuman
; particle size
; phytoplankton
; polymerization
; stress
; surface property
; suspended particulate matter
; algae
英文摘要: The effect of turbulence on phytoplankton growth has been widely studied; however, its effects with respects to suspended particulate matter (SPM) on the development of phytoplankton communities and the behavioral responses of phytoplankton to turbulence and SPM are poorly understood. Here, an approximately homogeneous turbulence simulation system (AHTS, mainly consisting of an oscillating-grid apparatus) was established to gain insight into the mechanisms underlying phytoplankton community responses in turbid, well-mixed waters. The results revealed that maintaining the turbulence dissipation rates (Ɛ) of 2.25 × 10 −3 and 1.80 × 10 −2 m 2 /s 3 caused significant reductions in algal density, and the effects could be substantially enhanced when 500 mg/L of SPM were added before day 12. In contrast to the constant decrease of algal density for the Ɛ of 2.25 × 10 −3 m 2 /s 3 , a dramatic increase in the phytoplankton density occurred after 16 days of incubation for a Ɛ of 1.80 × 10 −2 m 2 /s 3 , irrespective of SPM. Addition of SPM in the Ɛ of 1.80 × 10 −2 m 2 /s 3 treatments did not considerably affect the algal density profile compared to that without SPM, of which unicellular algae decreased and colonial algae dominated the phytoplankton community. On the other hand, the phytoplankton can regulate the SPM properties. During the 18 days’ coincubation, extracellular polymeric substances (EPS) released from algal cells induced larger particle sizes and round surfaces of SPM, which can reduce the damage received to algal cells. Here we demonstrated that the phytoplankton communities could actively counteract the effects of turbulence + SPM and adapt the couple stress, jointly through the release of EPS, the modification of SPM surface properties and the conversion of their assemblage pattern, thereby contributing to rebalance the ecosystem. These findings highlight the strategies employed during the reconstruction of phytoplankton under the dual effects of turbulence and SPM for the first time, consequently enabling the forecasting of the dominant species of phytoplankton in turbulent waters. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122159
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing, 400044, China; Biomass Energy Technology Research Center, Biogas Institute of Ministry of Agriculture, Chengdu, 610041, China
Recommended Citation:
Kang L.,He Y.,Dai L.,et al. Interactions between suspended particulate matter and algal cells contributed to the reconstruction of phytoplankton communities in turbulent waters[J]. Water Research,2019-01-01