نتایج جستجو برای: algal bloom

تعداد نتایج: 18518  

Journal: :Environmental microbiology 2017
Michelle A Berry Timothy W Davis Rose M Cory Melissa B Duhaime Thomas H Johengen George W Kling John A Marino Paul A Den Uyl Duane Gossiaux Gregory J Dick Vincent J Denef

Human activities are causing a global proliferation of cyanobacterial harmful algal blooms (CHABs), yet we have limited understanding of how these events affect freshwater bacterial communities. Using weekly data from western Lake Erie in 2014, we investigated how the cyanobacterial community varied over space and time, and whether the bloom affected non-cyanobacterial (nc-bacterial) diversity ...

2014
Seung Oh Lee Sooyoung Kim Moonil Kim Kyoung Jae Lim Younghun Jung

Algal blooms have threatened the environmental functions of artificial seawater canals. Generally, water quality in a canal is managed by periodically circulating water from the sea into the canal. However, hydraulic characteristics from the canal design can interrupt the removal of algal blooms by water circulations in the canal. Accordingly, this study analyzed the effect of the hydraulic cha...

2017
Zhangran Chen Wei Zheng Luxi Yang Lisa A. Boughner Yun Tian Tianling Zheng Hong Xu

Phaeodactylum tricornutum is a dominant bloom forming species and potential biofuel feedstock. To control P. tricornutum bloom or to release lipids from P. tricornutum, we previously screened and identified the lytic bacterium Labrenzia sp. KD531 toward P. tricornutum. In the present study, we evaluated the lytic activity of Labrenzia sp. KD531 on microalgae and investigated its lytic mechanism...

2015
Mei Zhu Jun Zhang Qingliang You Gary S. Bañuelos Zengliang Yu Miao Li

Harmful algal bloom (HAB) produced by several cyanobacterial species is a significant threat to many aquatic ecosystems around the world. Recently frequent occurrence of serious algal bloom in Lake Taihu, Lake Dianchi and Lake Chaohu has become a serious concern in China. Although various methods are currently being used to control toxic blue-green algal water blooms, many of their techniques a...

Journal: :Mathematical biosciences 2013
Jinhuo Luo

In this paper, we derive and analyze a mathematical model for the interactions between phytoplankton and zooplankton in a periodic environment, in which the growth rate and the intrinsic carrying-capacity of phytoplankton are changing with respect to time and nutrient concentration. A threshold value: "Predator's average growth rate" is introduced and it is proved that the phytoplankton-zooplan...

2017
Yu-Ting Bai Xiao-Yi Wang Xue-Bo Jin Ji-Ping Xu Zhao-Yang Wang

As a typical phenomenon of eutrophication pollution, algal bloom threatens public health and water security. The governance of algal bloom is largely affected by administrators’ knowledge and experience, which may lead to a subjective and one-sided decision-making result. Meanwhile, experts in the specific field can provide professional support. How to utilize expert resources adequately and au...

2011
Riina Klais Timo Tamminen Anke Kremp Kristian Spilling Kalle Olli

The algal spring bloom in the Baltic Sea represents an anomaly from the winter-spring bloom patterns worldwide in terms of frequent and recurring dominance of dinoflagellates over diatoms. Analysis of approximately 3500 spring bloom samples from the Baltic Sea monitoring programs revealed (i) that within the major basins the proportion of dinoflagellates varied from 0.1 (Kattegat) to >0.8 (cent...

2013
C. Sivapragasam Nitin Muttil S. Muthukumar V. M. Arun

In this study an attempt is made to mathematically model and predict algal blooms in Tolo Harbour (Hong Kong) using Genetic Programming (GP). Chlorophyll plays a vital role and is taken as a measure of algal bloom biomass and 8 other variables are taken as input for its prediction. It is observed that GP evolves multiple models with almost same values of errors – of – measure. Previous studies ...

Journal: :Marine Drugs 2008
Lorraine C. Backer Wayne Carmichael Barbara Kirkpatrick Christopher Williams Mitch Irvin Yue Zhou Trisha B. Johnson Kate Nierenberg Vincent R. Hill Stephanie M. Kieszak Yung-Sung Cheng

We measured microcystins in blood from people at risk for swallowing water or inhaling spray while swimming, water skiing, jet skiing, or boating during an algal bloom. We monitored water samples from a small lake as a Microcystis aeruginosa bloom developed. We recruited 97 people planning recreational activities in that lake and seven others who volunteered to recreate in a nearby bloom-free l...

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