نتایج جستجو برای: algal bloom

تعداد نتایج: 18518  

2013
Yuhong Jia Zhen Yang Wen Su Dan Johnson Fanxiang Kong

Controlling of cyanobacteria bloom during bottleneck stages of algal cycling in shallow Lake Taihu (China) Yuhong Jia, Zhen Yang, Wen Su, Dan Johnson & Fanxiang Kong To cite this article: Yuhong Jia, Zhen Yang, Wen Su, Dan Johnson & Fanxiang Kong (2014) Controlling of cyanobacteria bloom during bottleneck stages of algal cycling in shallow Lake Taihu (China), Journal of Freshwater Ecology, 29:1...

Journal: :Applied and environmental microbiology 2008
Xavier Mayali Peter J S Franks Farooq Azam

Isolation and cultivation are a crucial step in elucidating the physiology, biogeochemistry, and ecosystem role of microorganisms. Many abundant marine bacteria, including the widespread Roseobacter clade-affiliated (RCA) cluster group, have not been cultured with traditional methods. Using novel techniques of cocultivation with algal cultures, we have accomplished successful isolation and prop...

2004
Are Folkestad Lasse H. Pettersson Dominique Durand

Several satellite-borne ocean colour Earth observation (EO) sensors are presently collecting data on an operational basis, including the Envisat MERIS sensor. This study aims at detecting differences in ocean colour EO sensor performances for ocean monitoring and in particular the study of algal bloom situations. The motivation for the present study is to explore how data from different sensors...

Journal: :Current Biology 2001
Frederick R Cross James M Roberts

The discovery of a homolog of the retinoblastoma protein (Rb) in a single-celled eukaryote--the alga Chlamydomonas--promises new and surprising insights into Rb's function in cell-cycle regulation.

Journal: :Remote Sensing 2017
Wenxia Tan Pengcheng Liu Yi Liu Shao Yang Shunan Feng

Long-term information of phytoplankton bloom is critical for assessing the processes driving blooms in lakes. A three-decade survey of the phytoplankton blooms was completed for Erhai Lake from 1987 to 2016 with Landsat imagery. A modified three-band model using Landsat broad bands is developed by comparing reflectance data from Landsat imagery to two field datasets. The model is applied to the...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2002
Paul C Pickhardt Carol L Folt Celia Y Chen Bjoern Klaue Joel D Blum

Mercury accumulation in fish is a global public health concern, because fish are the primary source of toxic methylmercury to humans. Fish from all lakes do not pose the same level of risk to consumers. One of the most intriguing patterns is that potentially dangerous mercury concentrations can be found in fish from clear, oligotrophic lakes whereas fish from greener, eutrophic lakes often carr...

2014
Todd A. Egerton Ryan E. Morse Harold G. Marshall Margaret R. Mulholland

Algal blooms are dynamic phenomena, often attributed to environmental parameters that vary on short timescales (e.g., hours to days). Phytoplankton monitoring programs are largely designed to examine long-term trends and interannual variability. In order to better understand and evaluate the relationships between water quality variables and the genesis of algal blooms, daily samples were collec...

2017
Michel Starr Stéphane Lair Sonia Michaud Michael Scarratt Michael Quilliam Denis Lefaivre Michel Robert Andrew Wotherspoon Robert Michaud Nadia Ménard Gilbert Sauvé Sylvie Lessard Pierre Béland Lena Measures

Following heavy precipitation, we observed an intense algal bloom in the St. Lawrence Estuary (SLE) that coincided with an unusually high mortality of several species of marine fish, birds and mammals, including species designated at risk. The algal species was identified as Alexandrium tamarense and was determined to contain a potent mixture of paralytic shellfish toxins (PST). Significant lev...

2008
Raphael M. Kudela Jenny Q. Lane William P. Cochlan

Cultural eutrophication is frequently invoked as one factor in the global increase in harmful algal blooms, but is difficult to definitively prove due to themyriad of factors influencing coastal phytoplankton bloom development. To assess whether eutrophication could be a factor in the development of harmful algal blooms in California (USA), we review the ecophysiological potential for urea upta...

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